services

services/tiktak/.dockerignore

@@ -0,0 +1,2 @@
+public
+db_data

services/tiktak/Dockerfile

@@ -0,0 +1,12 @@
+FROM golang:1.12-alpine
+
+MAINTAINER tg: @jnovikov
+
+RUN apk update && apk add git gcc musl-dev ffmpeg
+
+WORKDIR /app
+COPY . .
+
+RUN go build -mod=vendor -o tiktak .
+
+ENTRYPOINT ["./tiktak"]

services/tiktak/db/db.go

@@ -0,0 +1,109 @@
+package db
+
+import (
+	"context"
+	"github.com/gocraft/dbr/v2"
+)
+
+type Storage struct {
+	conn *dbr.Connection
+}
+
+func New(conn *dbr.Connection) *Storage {
+	s := Storage{conn}
+	s.init()
+	return &s
+}
+
+func (s *Storage) init() {
+	for _, q := range []string{
+		"CREATE TABLE IF NOT EXISTS users(id INTEGER NOT NULL PRIMARY KEY AUTO_INCREMENT, login VARCHAR(200) UNIQUE , password VARCHAR(200))",
+		"CREATE TABLE IF NOT EXISTS video(id INTEGER NOT NULL PRIMARY KEY AUTO_INCREMENT, user_id INTEGER, description VARCHAR(500), private BOOLEAN, link VARCHAR(400))",
+		"CREATE TABLE IF NOT EXISTS access(id INTEGER NOT NULL PRIMARY KEY AUTO_INCREMENT, user_id INTEGER, video_id INTEGER)",
+	} {
+		_, err := s.conn.Exec(q)
+		if err != nil {
+			panic(err)
+		}
+	}
+}
+
+func (s *Storage) InsertUser(ctx context.Context, user *User) error {
+	sess := s.conn.NewSession(nil)
+	_, err := sess.InsertInto("users").Columns("login", "password").Record(user).ExecContext(ctx)
+	return err
+}
+
+func (s *Storage) FindUser(ctx context.Context, login, password string) (*User, error) {
+	sess := s.conn.NewSession(nil)
+	user := new(User)
+	err := sess.Select("*").
+		From("users").
+		Where("login = ?", login).
+		Where("password = ?", password).
+		LoadOneContext(ctx, user)
+	if err != nil {
+		return nil, err
+	}
+	return user, err
+}
+
+func (s *Storage) AddVideo(ctx context.Context, v *Video) error {
+	sess := s.conn.NewSession(nil)
+	_, err := sess.InsertInto("video").
+		Columns("user_id", "description", "private", "link").
+		Record(v).ExecContext(ctx)
+
+	return err
+}
+
+func (s *Storage) ListVideo(ctx context.Context, limit int) (v []Video, err error) {
+	sess := s.conn.NewSession(nil)
+	_, err = sess.Select("*").
+		From("video").
+		OrderDesc("id").
+		Limit(uint64(limit)).
+		LoadContext(ctx, &v)
+	return
+}
+
+func (s *Storage) ListUserVideo(ctx context.Context, userId int64) (v []Video, err error) {
+	sess := s.conn.NewSession(nil)
+	_, err = sess.Select("*").
+		From("video").
+		Where("user_id = ?", userId).
+		OrderDesc("id").LoadContext(ctx, &v)
+	return
+}
+
+func (s *Storage) GetVideo(ctx context.Context, id interface{}) (*Video, error) {
+	sess := s.conn.NewSession(nil)
+	v := new(Video)
+	err := sess.Select("*").From("video").Where("id = ?", id).LoadOneContext(ctx, v)
+	return v, err
+}
+
+func (s *Storage) HaveAccess(ctx context.Context, id interface{}, userId int64) bool {
+	sess := s.conn.NewSession(nil)
+
+	var c int
+	err := sess.Select("count(*)").
+		From("access").
+		Where("user_id = ?", userId).
+		Where("video_id = ?", id).
+		LoadOneContext(ctx, &c)
+	if err != nil {
+		return false
+	}
+	return c > 0
+}
+
+func (s *Storage) AddAccess(ctx context.Context, id int, userId int64) error {
+	sess := s.conn.NewSession(nil)
+
+	_, err := sess.InsertInto("access").
+		Pair("video_id", id).
+		Pair("user_id", userId).
+		ExecContext(ctx)
+	return err
+}

services/tiktak/db/db_test.go

@@ -0,0 +1,172 @@
+package db
+
+import (
+	"context"
+	"github.com/gocraft/dbr/v2"
+	_ "github.com/mattn/go-sqlite3"
+	"testing"
+)
+
+func setup() (*Storage, func()) {
+	conn, err := dbr.Open("sqlite3", ":memory:", nil)
+	if err != nil {
+		panic(err)
+	}
+	return New(conn), func() {
+		conn.Close()
+	}
+}
+
+func TestStorage_InsertUser(t *testing.T) {
+	db, teardown := setup()
+	defer teardown()
+	ctx := context.Background()
+	u := User{Login: "user", Password: "test"}
+	err := db.InsertUser(ctx, &u)
+	if err != nil {
+		t.Error("failed to insert user", err.Error())
+	}
+	if u.ID <= 0 {
+		t.Error("id should be positive")
+	}
+	err = db.InsertUser(ctx, &u)
+	if err == nil {
+		t.Error("should fail when inserting same user")
+	}
+}
+
+func TestStorage_FindUser(t *testing.T) {
+	db, teardown := setup()
+	defer teardown()
+	ctx := context.Background()
+	u := User{Login: "user", Password: "test"}
+	err := db.InsertUser(ctx, &u)
+	if err != nil {
+		t.Fatal("failed to insert user", err.Error())
+	}
+
+	u1, err := db.FindUser(ctx, "user", "test")
+	if err != nil {
+		t.Error("failed to retrieve user", err.Error())
+	}
+	if u1.Password != u.Password || u1.Login != u.Login {
+		t.Error("users should be equal")
+	}
+	u2, err := db.FindUser(ctx, "test", "test")
+	if err == nil {
+		t.Error("should fail because no user not found")
+	}
+	if u2 != nil {
+		t.Error("should be nil if user not found")
+	}
+}
+
+func TestStorage_AddVideo(t *testing.T) {
+	db, teardown := setup()
+	defer teardown()
+	ctx := context.Background()
+	v := Video{
+		UserID:      1,
+		Description: "Test",
+		Private:     false,
+		Link:        "test",
+	}
+	err := db.AddVideo(ctx, &v)
+	if err != nil {
+		t.Error("failed to insert video")
+	}
+
+	if v.ID <= 0 {
+		t.Error("id should be positive")
+	}
+}
+
+func TestStorage_ListVideo(t *testing.T) {
+	db, teardown := setup()
+	defer teardown()
+	ctx := context.Background()
+	v := Video{
+		UserID:      1,
+		Description: "Test",
+		Private:     false,
+		Link:        "test",
+	}
+	err := db.AddVideo(ctx, &v)
+	if err != nil {
+		t.Fatal("failed to insert video")
+	}
+
+	vds, err := db.ListVideo(ctx, 1)
+	if err != nil || len(vds) < 1 {
+		t.Error("failed to retrieve videos from db")
+	}
+
+	v.ID = vds[0].ID
+	if vds[0] != v {
+		t.Error("v != res[0]")
+	}
+}
+
+func TestStorage_ListUserVideo(t *testing.T) {
+	db, teardown := setup()
+	defer teardown()
+	ctx := context.Background()
+	for _, v := range []Video{
+		{UserID: 1, Description: "Test", Private: false, Link: "test"},
+		{UserID: 2, Description: "Test2", Private: false, Link: "test2"}} {
+		if err := db.AddVideo(ctx, &v); err != nil {
+			t.Fatal("failed to insert video:", err)
+		}
+
+	}
+
+	for _, u := range []int64{1, 2} {
+		vds, err := db.ListUserVideo(ctx, int64(u))
+		if err != nil || len(vds) != 1 {
+			t.Error("failed to retrieve videos from db for user: ", u)
+		}
+		if vds[0].UserID != u {
+			t.Errorf("video with wrong uid found. Expected %d, found %d", u, vds[0].UserID)
+		}
+	}
+}
+
+func TestStorage_GetVideo(t *testing.T) {
+	db, teardown := setup()
+	defer teardown()
+	ctx := context.Background()
+	v := Video{
+		UserID:      1,
+		Description: "Test",
+		Private:     false,
+		Link:        "test",
+	}
+	err := db.AddVideo(ctx, &v)
+	if err != nil {
+		t.Fatal("failed to insert video")
+	}
+
+	v2, err := db.GetVideo(ctx, v.ID)
+	if err != nil {
+		t.Errorf("failed to get video %v", err.Error())
+	}
+	if *v2 != v {
+		t.Errorf("videos dont match: expected %v, found %v", v, v2)
+	}
+}
+
+func TestStorage_AddAccess_HavAccess(t *testing.T) {
+	db, teardown := setup()
+	defer teardown()
+	ctx := context.Background()
+	if db.HaveAccess(ctx, 1, 2) {
+		t.Error("should not have access: empty table")
+	}
+	if err := db.AddAccess(ctx, 1, 2); err != nil {
+		t.Error("failed to add access", err)
+	}
+	if !db.HaveAccess(ctx, 1, 2) {
+		t.Error("should have access")
+	}
+
+}

services/tiktak/db/models.go

@@ -0,0 +1,15 @@
+package db
+
+type User struct {
+	ID       int64
+	Login    string
+	Password string
+}
+
+type Video struct {
+	ID          int64
+	UserID      int64
+	Description string
+	Private     bool
+	Link        string
+}

services/tiktak/docker-compose.yml

@@ -0,0 +1,20 @@
+version: '3'
+services:
+  tiktak:
+    build: .
+    ports:
+      - "5000:4000"
+    restart: always
+    volumes:
+      - ./public:/app/public
+    depends_on:
+      - db
+
+  db:
+    image: mysql:8.0.17
+    restart: always
+    volumes:
+      - ./db_data:/var/lib/mysql
+    environment:
+      MYSQL_ROOT_PASSWORD: root
+      MYSQL_DATABASE: tiktak

services/tiktak/go.mod

@@ -0,0 +1,17 @@
+module tiktak
+
+go 1.12
+
+require (
+	github.com/dgrijalva/jwt-go v3.2.0+incompatible // indirect
+	github.com/disintegration/imaging v1.6.2
+	github.com/go-sql-driver/mysql v1.5.0
+	github.com/gocraft/dbr/v2 v2.6.3
+	github.com/google/uuid v1.1.1
+	github.com/labstack/echo v3.3.10+incompatible
+	github.com/labstack/gommon v0.3.0 // indirect
+	github.com/mattn/go-sqlite3 v2.0.2+incompatible
+	github.com/thanhpk/randstr v1.0.4
+	github.com/valyala/fasttemplate v1.1.0 // indirect
+	golang.org/x/crypto v0.0.0-20200117160349-530e935923ad // indirect
+)

services/tiktak/go.sum

@@ -0,0 +1,64 @@
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services/tiktak/keygen/keygen.go

@@ -0,0 +1,27 @@
+package keygen
+
+/*
+#cgo LDFLAGS: ${SRCDIR}/legacy/keygen.a -lm
+#include <keygen.h>
+*/
+import "C"
+import (
+	"strings"
+	"unsafe"
+)
+
+func GenerateKey(vid int) string {
+	var key [C.TOK_SIZE]byte
+	keyPtr := (*C.char)(unsafe.Pointer(&key[0]))
+	C.GenerateToken(C.int(vid), keyPtr)
+	res := strings.Builder{}
+	for _, v := range key {
+		res.WriteByte(v)
+	}
+	return res.String()
+}
+
+func ValidateKey(token string, vid int) bool {
+	res := C.ValidateToken(C.int(vid), C.CString(token))
+	return res == 1
+}

services/tiktak/keygen/keygen.h

@@ -0,0 +1,12 @@
+//
+// Created by john on 1/24/20.
+//
+
+#ifndef KEYGEN_KEYGEN_H
+#define KEYGEN_KEYGEN_H
+
+#define TOK_SIZE 30
+
+void GenerateToken(int n, char* out);
+int ValidateToken(int n, char* token);
+#endif //KEYGEN_KEYGEN_H

services/tiktak/main.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	_ "github.com/go-sql-driver/mysql"
+	"github.com/gocraft/dbr/v2"
+	"github.com/thanhpk/randstr"
+	"net/http"
+	"os"
+	"os/signal"
+	"tiktak/db"
+	"tiktak/server"
+	"tiktak/server/auth"
+	"tiktak/video"
+	"time"
+)
+
+func main() {
+	conn, err := dbr.Open(
+		"mysql",
+		"root:root@tcp(db:3306)/tiktak", nil)
+
+	if err != nil {
+		panic(err)
+	}
+	defer conn.Close()
+
+	auth.SetSalt(randstr.Hex(20))
+	config := server.Config{
+		StaticFolder:    "public/static",
+		VttFolder:       "public/vtt",
+		TemplatesFolder: "templates",
+	}
+	srv := server.NewServer(db.New(conn), &video.Storage{Directory: "public/video"}, config)
+
+	// Start server
+	go func() {
+		if err := http.ListenAndServe(":4000", srv); err != nil {
+			fmt.Println("shutting down the server")
+		}
+	}()
+
+	// Graceful shutdown
+	quit := make(chan os.Signal)
+	signal.Notify(quit, os.Interrupt)
+	<-quit
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+	if err := srv.Shutdown(ctx); err != nil {
+		panic(err)
+	}
+}

services/tiktak/public/static/app.css

@@ -0,0 +1,14 @@
+body {
+}
+
+.ui.menu .item {
+    margin-right: 1.5em;
+}
+
+.main.container {
+    margin-top: 7em;
+}
+
+.wireframe {
+    margin-top: 2em;
+}

services/tiktak/server/auth/auth.go

@@ -0,0 +1,28 @@
+package auth
+
+import (
+	"crypto/sha256"
+	"fmt"
+)
+
+var Salt = ""
+
+func SetSalt(s string) {
+	Salt = s
+}
+
+func Validate(id string, hash string) bool {
+	return Generate(id) == hash
+}
+
+func Generate(id string) string {
+	return hashSha(Salt, id)
+}
+
+func hashSha(strings ...string) string {
+	h := sha256.New()
+	for _, s := range strings {
+		h.Write([]byte(s))
+	}
+	return fmt.Sprintf("%x", h.Sum(nil))
+}

services/tiktak/server/auth/context.go

@@ -0,0 +1,36 @@
+package auth
+
+import (
+	"github.com/labstack/echo"
+	"net/http"
+	"strconv"
+)
+
+const HashCookieName = "hash"
+const IdCookieName = "user_id"
+
+func Cookies(id int64) (*http.Cookie, *http.Cookie) {
+	ids := strconv.FormatInt(id, 10)
+	return &http.Cookie{Value: ids, Name: IdCookieName}, &http.Cookie{Value: Generate(ids), Name: HashCookieName}
+}
+
+type Context struct {
+	echo.Context
+}
+
+func (uc *Context) GetId() (uid int64) {
+	idc, err := uc.Cookie(IdCookieName)
+	if err != nil {
+		return
+	}
+	hashc, err := uc.Cookie(HashCookieName)
+	if err != nil {
+		return
+	}
+
+	v, err := strconv.ParseInt(idc.Value, 10, 64)
+	if Validate(idc.Value, hashc.Value) && err == nil {
+		uid = v
+	}
+	return
+}

services/tiktak/server/auth/middleware.go

@@ -0,0 +1,16 @@
+package auth
+
+import (
+	"github.com/labstack/echo"
+	"net/http"
+)
+
+func RequiredMiddleware(next echo.HandlerFunc) echo.HandlerFunc {
+	return func(c echo.Context) error {
+		ac := c.(*Context)
+		if ac == nil || ac.GetId() == 0 {
+			return c.Redirect(http.StatusFound, "/login")
+		}
+		return next(c)
+	}
+}

services/tiktak/server/config.go

@@ -0,0 +1,7 @@
+package server
+
+type Config struct {
+	StaticFolder    string
+	VttFolder       string
+	TemplatesFolder string
+}

services/tiktak/server/response.go

@@ -0,0 +1,43 @@
+package server
+
+import "fmt"
+
+func jsonError(s string) interface{} {
+	return map[string]string{"error": s}
+}
+
+func jsonErrorf(f string, a ...interface{}) interface{} {
+	return jsonError(fmt.Sprintf(f, a))
+}
+
+type BaseResponse struct {
+	UserId int
+	Error  string
+}
+
+type ErrorResponse struct {
+	Error string
+}
+
+type FeedResponse struct {
+	ID      int64
+	Preview string
+}
+
+type WatchResponse struct {
+	Description string
+	VttPath     string
+	VideoPath   string
+}
+
+type VideoResponse struct {
+	FeedResponse
+	Private     bool
+	Token       string
+	Description string
+}
+
+type AccessResponse struct {
+	ErrorResponse
+	ID int
+}

services/tiktak/server/server.go

@@ -0,0 +1,311 @@
+package server
+
+import (
+	"context"
+	"fmt"
+	"github.com/labstack/echo"
+	"github.com/labstack/echo/middleware"
+	"html/template"
+	"net/http"
+	"os"
+	"path"
+	"strconv"
+	"tiktak/db"
+	"tiktak/keygen"
+	"tiktak/server/auth"
+	"tiktak/video"
+	"time"
+)
+
+func NewServer(db *db.Storage, vs *video.Storage, c Config) *Server {
+	s := &Server{echo.New(), db, vs, c}
+
+	t := Template{template.Must(template.ParseGlob(c.TemplatesFolder + "/*.html"))}
+	s.e.Renderer = &t
+	s.e.Use(middleware.Recover())
+	s.e.Use(func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) error {
+			cc := &auth.Context{Context: c}
+			return next(cc)
+		}
+	})
+	s.routes()
+	return s
+}
+
+type Server struct {
+	e  *echo.Echo
+	db *db.Storage
+	vs *video.Storage
+	c  Config
+}
+
+func (s *Server) loginPage(c echo.Context) error {
+	return c.Render(200, "login", nil)
+}
+
+func (s *Server) handleLogin(c echo.Context) error {
+	login := c.FormValue("login")
+	password := c.FormValue("password")
+
+	user, err := s.db.FindUser(context.Background(), login, password)
+	if err != nil {
+		return c.Render(http.StatusUnprocessableEntity, "login", ErrorResponse{err.Error()})
+	}
+
+	c1, c2 := auth.Cookies(user.ID)
+	c.SetCookie(c1)
+	c.SetCookie(c2)
+
+	return c.Redirect(http.StatusFound, "/home")
+}
+
+func (s *Server) registerPage(c echo.Context) error {
+	return c.Render(200, "register", nil)
+}
+
+func (s *Server) handleRegister(c echo.Context) error {
+	login := c.FormValue("login")
+	password := c.FormValue("password")
+	if login == "" || password == "" {
+		return c.Render(http.StatusUnprocessableEntity, "register", ErrorResponse{"fill the form"})
+	}
+	u := db.User{Login: login, Password: password}
+	err := s.db.InsertUser(context.Background(), &u)
+	if err != nil {
+		return c.Render(http.StatusUnprocessableEntity, "register", ErrorResponse{err.Error()})
+	}
+
+	c1, c2 := auth.Cookies(u.ID)
+	c.SetCookie(c1)
+	c.SetCookie(c2)
+
+	return c.Redirect(http.StatusFound, "/home")
+}
+
+func (s *Server) createPage(c echo.Context) error {
+	return c.Render(http.StatusOK, "create", nil)
+}
+
+func (s *Server) handleCreate(c echo.Context) error {
+	ac := c.(*auth.Context)
+	uid := ac.GetId()
+
+	f, err := c.FormFile("video")
+
+	if err != nil {
+		return c.Render(http.StatusUnprocessableEntity, "create", ErrorResponse{err.Error()})
+	}
+	if f.Size > video.MaxSize {
+		return c.Render(http.StatusUnprocessableEntity, "create", ErrorResponse{"file is too large"})
+	}
+	vfile, err := f.Open()
+	if err != nil {
+		return c.Render(http.StatusUnprocessableEntity, "create", ErrorResponse{err.Error()})
+	}
+
+	link, err := s.vs.Store(vfile)
+	if err != nil {
+		return c.Render(http.StatusUnprocessableEntity, "create", ErrorResponse{"failed to store video: " + err.Error()})
+	}
+
+	descr := c.FormValue("description")
+	subt := c.FormValue("subtitles")
+	isPrivate := c.FormValue("private")
+	v := db.Video{UserID: uid, Description: descr, Private: isPrivate == "on", Link: link}
+
+	ctx := context.Background()
+	err = s.db.AddVideo(ctx, &v)
+	if err != nil {
+		return c.Render(http.StatusUnprocessableEntity, "create", ErrorResponse{"failed to store record: " + err.Error()})
+	}
+
+	ppath := s.previewPath(v.ID)
+
+	ctx, cancel := context.WithTimeout(ctx, time.Second*7)
+	defer cancel()
+
+	err = video.GeneratePreview(ctx, s.vs.Path(link), ppath)
+	if err != nil {
+		return c.Render(http.StatusUnprocessableEntity, "create", ErrorResponse{"failed to generate preview: " + err.Error()})
+	}
+	if err := s.storeVtt(ctx, v, subt); err != nil {
+		return c.Render(http.StatusUnprocessableEntity, "create", ErrorResponse{err.Error()})
+	}
+	if v.Private {
+		if err = video.Blur(ppath, s.privatePreviewPath(v.ID)); err != nil {
+			return c.Render(http.StatusUnprocessableEntity, "create", ErrorResponse{"failed to blur preview: " + err.Error()})
+		}
+	}
+	return c.Redirect(http.StatusFound, fmt.Sprintf("/watch/%d", v.ID))
+}
+
+func (s *Server) handleFeed(c echo.Context) error {
+	ctx := context.Background()
+	vds, err := s.db.ListVideo(ctx, 50)
+	if err != nil {
+		return c.JSON(http.StatusServiceUnavailable, jsonError(err.Error()))
+	}
+	resp := make([]FeedResponse, len(vds))
+	for i, v := range vds {
+		resp[i].ID = vds[i].ID
+		if v.Private {
+			resp[i].Preview = s.privatePreviewPath(v.ID)
+		} else {
+			resp[i].Preview = s.previewPath(v.ID)
+		}
+	}
+	return c.Render(http.StatusOK, "feed", resp)
+}
+
+func (s *Server) handleWatch(c echo.Context) error {
+	ac := c.(*auth.Context)
+	vid := c.Param("id")
+	ctx := context.Background()
+	v, err := s.db.GetVideo(ctx, vid)
+	if err != nil {
+		return c.NoContent(http.StatusNotFound)
+	}
+	uid := ac.GetId()
+	if s.haveAccess(ctx, uid, *v) {
+		resp := WatchResponse{
+			Description: v.Description,
+			VttPath:     "/vtt/?id=" + vid,
+			VideoPath:   s.vs.Path(v.Link),
+		}
+		return c.Render(http.StatusOK, "watch", resp)
+	}
+	return c.Render(http.StatusForbidden, "access", AccessResponse{ID: int(v.ID)})
+}
+
+func (s *Server) handleVtt(c echo.Context) error {
+	ac := c.(*auth.Context)
+	vid := c.QueryParam("id")
+	uid := ac.GetId()
+	ctx := context.Background()
+	v, _ := s.db.GetVideo(ctx, vid)
+	if !s.haveAccess(ctx, uid, *v) {
+		return c.NoContent(http.StatusForbidden)
+	}
+	vttPath := path.Join(s.c.VttFolder, vid+".vtt")
+	return c.File(vttPath)
+}
+
+func (s *Server) handleAccess(c echo.Context) error {
+	ac := c.(*auth.Context)
+	vidString := c.FormValue("videoID")
+	vid, err := strconv.Atoi(vidString)
+	if err != nil {
+		return c.Render(http.StatusUnprocessableEntity, "access", AccessResponse{
+			ErrorResponse: ErrorResponse{"bad video id: " + err.Error()},
+			ID:            0,
+		})
+	}
+
+	key := c.FormValue("token")
+	if keygen.ValidateKey(key, vid) {
+		ctx := context.Background()
+		if err := s.db.AddAccess(ctx, vid, ac.GetId()); err != nil {
+			return c.Render(http.StatusServiceUnavailable, "access", AccessResponse{
+				ErrorResponse: ErrorResponse{"try again later: " + err.Error()},
+				ID:            vid,
+			})
+		}
+		return c.Redirect(http.StatusFound, "/watch/"+strconv.Itoa(vid))
+	}
+	return c.Render(http.StatusUnprocessableEntity, "access", AccessResponse{
+		ErrorResponse: ErrorResponse{"Bad token"},
+		ID:            vid,
+	})
+
+}
+
+func (s *Server) homePage(c echo.Context) error {
+	ac := c.(*auth.Context)
+	vds, err := s.db.ListUserVideo(context.Background(), ac.GetId())
+	if err != nil {
+		return c.Render(http.StatusServiceUnavailable, "home", ErrorResponse{Error: err.Error()})
+	}
+	vresp := make([]VideoResponse, len(vds))
+	for i, v := range vds {
+		vresp[i].ID = v.ID
+		vresp[i].Private = v.Private
+		vresp[i].Description = v.Description
+		if v.Private {
+			vresp[i].Token = keygen.GenerateKey(int(v.ID))
+			vresp[i].Preview = s.privatePreviewPath(v.ID)
+		} else {
+			vresp[i].Preview = s.previewPath(v.ID)
+		}
+	}
+	return c.Render(http.StatusOK, "home", vresp)
+}
+
+func (s *Server) indexPage(c echo.Context) error {
+	ac := c.(*auth.Context)
+	if ac.GetId() != 0 {
+		return c.Redirect(http.StatusFound, "/home")
+	}
+	return c.Redirect(http.StatusFound, "/login")
+}
+
+func (s *Server) haveAccess(ctx context.Context, uid int64, v db.Video) bool {
+	if v.UserID == uid {
+		return true
+	}
+	if !v.Private {
+		return true
+	}
+	return s.db.HaveAccess(ctx, v.ID, uid)
+}
+
+func (s *Server) storeVtt(ctx context.Context, v db.Video, subtitles string) error {
+	vtt, err := video.GenerateVtt(ctx, s.vs.Path(v.Link), subtitles)
+	if err != nil {
+		return err
+	}
+
+	f, err := os.Create(path.Join(s.c.VttFolder, fmt.Sprintf("%d.vtt", v.ID)))
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+	fmt.Fprint(f, "WEBVTT Kind: captions; Language: ctf\n\n")
+	for _, line := range vtt {
+		fmt.Fprintln(f, line)
+	}
+	return nil
+}
+
+func (s *Server) previewPath(vid int64) string {
+	return path.Join(s.c.StaticFolder, fmt.Sprintf("preview_%d.png", vid))
+}
+
+func (s *Server) privatePreviewPath(vid int64) string {
+	return path.Join(s.c.StaticFolder, fmt.Sprintf("preview_%d_blured.png", vid))
+}
+
+func (s *Server) routes() {
+	s.e.GET("/login", s.loginPage)
+	s.e.POST("/login", s.handleLogin)
+	s.e.GET("/register", s.registerPage)
+	s.e.POST("/register", s.handleRegister)
+	s.e.GET("/create", s.createPage, auth.RequiredMiddleware)
+	s.e.POST("/create", s.handleCreate, auth.RequiredMiddleware)
+	s.e.GET("/feed", s.handleFeed)
+	s.e.GET("/watch/:id", s.handleWatch)
+	s.e.POST("/access", s.handleAccess, auth.RequiredMiddleware)
+	s.e.GET("/vtt/", s.handleVtt)
+	s.e.GET("/home", s.homePage, auth.RequiredMiddleware)
+	s.e.Static("/"+s.vs.Directory, s.vs.Directory)
+	s.e.Static("/"+s.c.StaticFolder, s.c.StaticFolder)
+	s.e.GET("/", s.indexPage)
+}
+
+func (s *Server) Shutdown(ctx context.Context) error {
+	return s.e.Shutdown(ctx)
+}
+
+func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	s.e.ServeHTTP(w, r)
+}

services/tiktak/server/templates.go

@@ -0,0 +1,15 @@
+package server
+
+import (
+	"github.com/labstack/echo"
+	"html/template"
+	"io"
+)
+
+type Template struct {
+	templates *template.Template
+}
+
+func (t *Template) Render(w io.Writer, name string, data interface{}, c echo.Context) error {
+	return t.templates.ExecuteTemplate(w, name, data)
+}

services/tiktak/templates/access.html

@@ -0,0 +1,26 @@
+{{define "access"}}
+    {{template "header" .Error}}
+    <div class="ui text container">
+        <h1 class="ui header">Access denied</h1>
+        <div class="ui one column grid">
+            <div class="column">
+                <div class="ui message">
+                    <h4 class="ui header">This video is private. You can get access to it using author's token.</h4>
+                </div>
+            </div>
+        </div>
+    </div>
+    <br>
+    <div class="ui text container">
+        <form class="ui form" method="post" action="/access" enctype="multipart/form-data">
+            <div class="field">
+                <label>Token:</label>
+                <input required type="text" style="width: 30%;" name="token" placeholder="aAbBcC">
+            </div>
+            <input name="videoID" type="hidden" value="{{ .ID}}">
+            <button class="ui button" type="submit">Submit</button>
+        </form>
+    </div>
+
+    {{template "footer"}}
+{{ end }}

services/tiktak/templates/base.html

@@ -0,0 +1,67 @@
+{{define "header"}}
+<!doctype html>
+<html class="no-js" lang="en">
+<head>
+    <meta charset="utf-8"/>
+    <meta http-equiv="x-ua-compatible" content="ie=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
+    <title>TikTak</title>
+    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/semantic-ui@2.4.2/dist/semantic.min.css">
+    <script
+            src="https://code.jquery.com/jquery-3.1.1.min.js"
+            integrity="sha256-hVVnYaiADRTO2PzUGmuLJr8BLUSjGIZsDYGmIJLv2b8="
+            crossorigin="anonymous"></script>
+    <script src="https://cdn.jsdelivr.net/npm/semantic-ui@2.4.2/dist/semantic.min.js"></script>
+</head>
+
+<style type="text/css">
+    body {
+        background-color: #ffffff;
+    }
+
+    .ui.menu .item img.logo {
+        margin-right: 1.5em;
+    }
+
+    .main.container {
+        margin-top: 7em;
+    }
+
+    .wireframe {
+        margin-top: 2em;
+    }
+
+    .ui.footer.segment {
+        margin: 5em 0em 0em;
+        padding: 5em 0em;
+    }
+</style>
+<body>
+
+<div class="ui inverted segment">
+    <div class="ui inverted secondary menu">
+        <a href="/" class="active item">
+            Home
+        </a>
+        <a href="/register" class="item">
+            Register
+        </a>
+        <a href="/login" class="item">
+            Login
+        </a>
+        <a href="/feed" class="item">
+            Feed
+        </a>
+    </div>
+</div>
+
+{{ if . }}
+    <div class="ui text container">
+        <div class="ui error message">    {{.}}</div>
+    </div>
+    <br>
+{{end}}
+
+
+{{end}}
+

services/tiktak/templates/create.html

@@ -0,0 +1,38 @@
+{{define "create"}}
+    {{template "header" .Error}}
+    <div class="ui text container">
+        <h1 class="ui header">Upload new video</h1>
+        <div class="ui one column grid">
+            <div class="column">
+                <div class="ui message">
+                    <h4 class="ui header">Upload your best moments (only webm is supported)</h4>
+                </div>
+            </div>
+        </div>
+    </div>
+    <br>
+    <div class="ui text container">
+        <form class="ui form" method="post" action="" enctype="multipart/form-data">
+            <div class="field">
+                <label>Description:</label>
+                <input required type="text" style="width: 30%;" name="description" placeholder="kek">
+            </div>
+            <div class="field">
+                <label>Add caption to your video</label>
+                <textarea required rows="3" style="width: 30%" name="subtitles" placeholder="Some text"></textarea>
+            </div>
+            <div class="field">
+                <div class="ui checkbox">
+                    <input name="private" type="checkbox" tabindex="0" class="hidden">
+                    <label>Make video private</label>
+                </div>
+            </div>
+            <div class="field">
+                <input type="file" name="video" required id="fileupload"/>
+            </div>
+            <button class="ui button" type="submit">Submit</button>
+        </form>
+    </div>
+
+    {{template "footer"}}
+{{ end }}

services/tiktak/templates/feed.html

@@ -0,0 +1,21 @@
+{{define "feed"}}
+    {{template "header" }}
+
+    <div class="ui text container">
+        <h3>Check out last videos: (some of them are private)</h3>
+    </div>
+        <br>
+    <div class="ui grid">
+        {{range .}}
+            <div class="four wide column">
+                <div class="ui secondary segment">
+                    <p><b>ID:</b> {{.ID}}</p>
+                    <p><a href="/watch/{{ .ID}}">Watch</a> </p>
+                    <a href="/watch/{{ .ID}}"><img class="thumbnail" width="256" height="144" src="{{ .Preview}}"></a>
+                </div>
+            </div>
+        {{ end}}
+    </div>
+
+    {{template "footer"}}
+{{ end }}

services/tiktak/templates/footer.html

@@ -0,0 +1,10 @@
+{{define "footer"}}
+
+    </body>
+    <script>
+        $('.ui.checkbox')
+            .checkbox()
+        ;
+    </script>
+    </html>
+{{ end }}

services/tiktak/templates/home.html

@@ -0,0 +1,26 @@
+{{define "home"}}
+    {{template "header" }}
+
+    <div class="ui text container">
+        <p>You can add new video <a href="/create">here</a></p>
+        <h3>Your videos:</h3>
+    </div>
+    <br>
+    <div class="ui grid">
+        {{range .}}
+            <div class="four wide column">
+                <div class="ui secondary segment">
+                    <p><b>ID:</b> {{.ID}}</p>
+                    <p><a href="/watch/{{ .ID}}">Watch</a></p>
+                    <a href="/watch/{{ .ID}}"><img class="thumbnail" width="256" height="144" src="{{ .Preview}}"></a>
+                    <p>Description: {{ .Description}}</p>
+                    {{ if .Private}}
+                        <p>Share Token: {{ .Token}}</p>
+                    {{ end }}
+                </div>
+            </div>
+        {{ end}}
+    </div>
+
+    {{template "footer"}}
+{{ end }}

services/tiktak/templates/login.html

@@ -0,0 +1,30 @@
+{{define "login"}}
+    {{template "header" .Error}}
+    <div class="ui text container">
+        <h1 class="ui header">Login</h1>
+        <div class="ui one column grid">
+            <div class="column">
+                <div class="ui message">
+                    <h4 class="ui header">Welcome to tiktak, best video service ever</h4>
+                </div>
+            </div>
+        </div>
+    </div>
+    <div class="ui text container">
+        <form class="ui form" method="post" action="">
+            <div class="field">
+                <label>Login</label>
+                <input type="text" required name="login" placeholder="admin">
+            </div>
+            <div class="field">
+                <label>Password</label>
+                <input type="password" required name="password" placeholder="">
+            </div>
+            <button class="ui button" type="submit">Submit</button>
+        </form>
+    </div>
+
+
+
+    {{template "footer"}}
+{{ end }}

services/tiktak/templates/register.html

@@ -0,0 +1,30 @@
+{{define "register"}}
+    {{template "header" .Error}}
+    <div class="ui text container">
+        <h1 class="ui header">Register</h1>
+        <div class="ui one column grid">
+            <div class="column">
+                <div class="ui message">
+                    <h4 class="ui header">Sign-up to tiktak, best video service ever</h4>
+                </div>
+            </div>
+        </div>
+    </div>
+    <div class="ui text container">
+        <form class="ui form" method="post" action="">
+            <div class="field">
+                <label>Login</label>
+                <input type="text" required name="login" placeholder="admin">
+            </div>
+            <div class="field">
+                <label>Password</label>
+                <input type="password" required name="password" placeholder="">
+            </div>
+            <button class="ui button" type="submit">Submit</button>
+        </form>
+    </div>
+
+
+
+    {{template "footer"}}
+{{ end }}

services/tiktak/templates/watch.html

@@ -0,0 +1,21 @@
+{{define "watch"}}
+    {{template "header"}}
+    <div class="ui text container">
+
+        <video controls width="640">
+            <source src="/{{ .VideoPath}}" type="video/webm"/>
+            <track label="Text" kind="subtitles" srclang="en" src="{{ .VttPath }}" default>
+            <p>Video is not supported in your browser</p>
+        </video>
+
+        <div class="ui one column grid">
+            <div class="column">
+                <div class="ui message">
+                    <h4 class="ui header">{{ .Description }}</h4>
+                </div>
+            </div>
+        </div>
+    </div>
+
+    {{template "footer"}}
+{{ end }}

services/tiktak/vendor/github.com/dgrijalva/jwt-go/.gitignore

@@ -0,0 +1,4 @@
+.DS_Store
+bin
+
+

services/tiktak/vendor/github.com/dgrijalva/jwt-go/.travis.yml

@@ -0,0 +1,13 @@
+language: go
+
+script:
+    - go vet ./...
+    - go test -v ./...
+
+go:
+  - 1.3
+  - 1.4
+  - 1.5
+  - 1.6
+  - 1.7
+  - tip

services/tiktak/vendor/github.com/dgrijalva/jwt-go/LICENSE

@@ -0,0 +1,8 @@
+Copyright (c) 2012 Dave Grijalva
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+

services/tiktak/vendor/github.com/dgrijalva/jwt-go/MIGRATION_GUIDE.md

@@ -0,0 +1,97 @@
+## Migration Guide from v2 -> v3
+
+Version 3 adds several new, frequently requested features.  To do so, it introduces a few breaking changes.  We've worked to keep these as minimal as possible.  This guide explains the breaking changes and how you can quickly update your code.
+
+### `Token.Claims` is now an interface type
+
+The most requested feature from the 2.0 verison of this library was the ability to provide a custom type to the JSON parser for claims. This was implemented by introducing a new interface, `Claims`, to replace `map[string]interface{}`.  We also included two concrete implementations of `Claims`: `MapClaims` and `StandardClaims`.
+
+`MapClaims` is an alias for `map[string]interface{}` with built in validation behavior.  It is the default claims type when using `Parse`.  The usage is unchanged except you must type cast the claims property.
+
+The old example for parsing a token looked like this..
+
+```go
+	if token, err := jwt.Parse(tokenString, keyLookupFunc); err == nil {
+		fmt.Printf("Token for user %v expires %v", token.Claims["user"], token.Claims["exp"])
+	}
+```
+
+is now directly mapped to...
+
+```go
+	if token, err := jwt.Parse(tokenString, keyLookupFunc); err == nil {
+		claims := token.Claims.(jwt.MapClaims)
+		fmt.Printf("Token for user %v expires %v", claims["user"], claims["exp"])
+	}
+```
+
+`StandardClaims` is designed to be embedded in your custom type.  You can supply a custom claims type with the new `ParseWithClaims` function.  Here's an example of using a custom claims type.
+
+```go
+	type MyCustomClaims struct {
+		User string
+		*StandardClaims
+	}
+	
+	if token, err := jwt.ParseWithClaims(tokenString, &MyCustomClaims{}, keyLookupFunc); err == nil {
+		claims := token.Claims.(*MyCustomClaims)
+		fmt.Printf("Token for user %v expires %v", claims.User, claims.StandardClaims.ExpiresAt)
+	}
+```
+
+### `ParseFromRequest` has been moved
+
+To keep this library focused on the tokens without becoming overburdened with complex request processing logic, `ParseFromRequest` and its new companion `ParseFromRequestWithClaims` have been moved to a subpackage, `request`.  The method signatues have also been augmented to receive a new argument: `Extractor`.
+
+`Extractors` do the work of picking the token string out of a request.  The interface is simple and composable.
+
+This simple parsing example:
+
+```go
+	if token, err := jwt.ParseFromRequest(tokenString, req, keyLookupFunc); err == nil {
+		fmt.Printf("Token for user %v expires %v", token.Claims["user"], token.Claims["exp"])
+	}
+```
+
+is directly mapped to:
+
+```go
+	if token, err := request.ParseFromRequest(req, request.OAuth2Extractor, keyLookupFunc); err == nil {
+		claims := token.Claims.(jwt.MapClaims)
+		fmt.Printf("Token for user %v expires %v", claims["user"], claims["exp"])
+	}
+```
+
+There are several concrete `Extractor` types provided for your convenience:
+
+* `HeaderExtractor` will search a list of headers until one contains content.
+* `ArgumentExtractor` will search a list of keys in request query and form arguments until one contains content.
+* `MultiExtractor` will try a list of `Extractors` in order until one returns content.
+* `AuthorizationHeaderExtractor` will look in the `Authorization` header for a `Bearer` token.
+* `OAuth2Extractor` searches the places an OAuth2 token would be specified (per the spec): `Authorization` header and `access_token` argument
+* `PostExtractionFilter` wraps an `Extractor`, allowing you to process the content before it's parsed.  A simple example is stripping the `Bearer ` text from a header
+
+
+### RSA signing methods no longer accept `[]byte` keys
+
+Due to a [critical vulnerability](https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/), we've decided the convenience of accepting `[]byte` instead of `rsa.PublicKey` or `rsa.PrivateKey` isn't worth the risk of misuse.
+
+To replace this behavior, we've added two helper methods: `ParseRSAPrivateKeyFromPEM(key []byte) (*rsa.PrivateKey, error)` and `ParseRSAPublicKeyFromPEM(key []byte) (*rsa.PublicKey, error)`.  These are just simple helpers for unpacking PEM encoded PKCS1 and PKCS8 keys. If your keys are encoded any other way, all you need to do is convert them to the `crypto/rsa` package's types.
+
+```go 
+	func keyLookupFunc(*Token) (interface{}, error) {
+		// Don't forget to validate the alg is what you expect:
+		if _, ok := token.Method.(*jwt.SigningMethodRSA); !ok {
+			return nil, fmt.Errorf("Unexpected signing method: %v", token.Header["alg"])
+		}
+		
+		// Look up key 
+		key, err := lookupPublicKey(token.Header["kid"])
+		if err != nil {
+			return nil, err
+		}
+		
+		// Unpack key from PEM encoded PKCS8
+		return jwt.ParseRSAPublicKeyFromPEM(key)
+	}
+```

services/tiktak/vendor/github.com/dgrijalva/jwt-go/README.md

@@ -0,0 +1,100 @@
+# jwt-go
+
+[![Build Status](https://travis-ci.org/dgrijalva/jwt-go.svg?branch=master)](https://travis-ci.org/dgrijalva/jwt-go)
+[![GoDoc](https://godoc.org/github.com/dgrijalva/jwt-go?status.svg)](https://godoc.org/github.com/dgrijalva/jwt-go)
+
+A [go](http://www.golang.org) (or 'golang' for search engine friendliness) implementation of [JSON Web Tokens](http://self-issued.info/docs/draft-ietf-oauth-json-web-token.html)
+
+**NEW VERSION COMING:** There have been a lot of improvements suggested since the version 3.0.0 released in 2016. I'm working now on cutting two different releases: 3.2.0 will contain any non-breaking changes or enhancements. 4.0.0 will follow shortly which will include breaking changes. See the 4.0.0 milestone to get an idea of what's coming. If you have other ideas, or would like to participate in 4.0.0, now's the time. If you depend on this library and don't want to be interrupted, I recommend you use your dependency mangement tool to pin to version 3. 
+
+**SECURITY NOTICE:** Some older versions of Go have a security issue in the cryotp/elliptic. Recommendation is to upgrade to at least 1.8.3. See issue #216 for more detail.
+
+**SECURITY NOTICE:** It's important that you [validate the `alg` presented is what you expect](https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/). This library attempts to make it easy to do the right thing by requiring key types match the expected alg, but you should take the extra step to verify it in your usage.  See the examples provided.
+
+## What the heck is a JWT?
+
+JWT.io has [a great introduction](https://jwt.io/introduction) to JSON Web Tokens.
+
+In short, it's a signed JSON object that does something useful (for example, authentication).  It's commonly used for `Bearer` tokens in Oauth 2.  A token is made of three parts, separated by `.`'s.  The first two parts are JSON objects, that have been [base64url](http://tools.ietf.org/html/rfc4648) encoded.  The last part is the signature, encoded the same way.
+
+The first part is called the header.  It contains the necessary information for verifying the last part, the signature.  For example, which encryption method was used for signing and what key was used.
+
+The part in the middle is the interesting bit.  It's called the Claims and contains the actual stuff you care about.  Refer to [the RFC](http://self-issued.info/docs/draft-jones-json-web-token.html) for information about reserved keys and the proper way to add your own.
+
+## What's in the box?
+
+This library supports the parsing and verification as well as the generation and signing of JWTs.  Current supported signing algorithms are HMAC SHA, RSA, RSA-PSS, and ECDSA, though hooks are present for adding your own.
+
+## Examples
+
+See [the project documentation](https://godoc.org/github.com/dgrijalva/jwt-go) for examples of usage:
+
+* [Simple example of parsing and validating a token](https://godoc.org/github.com/dgrijalva/jwt-go#example-Parse--Hmac)
+* [Simple example of building and signing a token](https://godoc.org/github.com/dgrijalva/jwt-go#example-New--Hmac)
+* [Directory of Examples](https://godoc.org/github.com/dgrijalva/jwt-go#pkg-examples)
+
+## Extensions
+
+This library publishes all the necessary components for adding your own signing methods.  Simply implement the `SigningMethod` interface and register a factory method using `RegisterSigningMethod`.  
+
+Here's an example of an extension that integrates with the Google App Engine signing tools: https://github.com/someone1/gcp-jwt-go
+
+## Compliance
+
+This library was last reviewed to comply with [RTF 7519](http://www.rfc-editor.org/info/rfc7519) dated May 2015 with a few notable differences:
+
+* In order to protect against accidental use of [Unsecured JWTs](http://self-issued.info/docs/draft-ietf-oauth-json-web-token.html#UnsecuredJWT), tokens using `alg=none` will only be accepted if the constant `jwt.UnsafeAllowNoneSignatureType` is provided as the key.
+
+## Project Status & Versioning
+
+This library is considered production ready.  Feedback and feature requests are appreciated.  The API should be considered stable.  There should be very few backwards-incompatible changes outside of major version updates (and only with good reason).
+
+This project uses [Semantic Versioning 2.0.0](http://semver.org).  Accepted pull requests will land on `master`.  Periodically, versions will be tagged from `master`.  You can find all the releases on [the project releases page](https://github.com/dgrijalva/jwt-go/releases).
+
+While we try to make it obvious when we make breaking changes, there isn't a great mechanism for pushing announcements out to users.  You may want to use this alternative package include: `gopkg.in/dgrijalva/jwt-go.v3`.  It will do the right thing WRT semantic versioning.
+
+**BREAKING CHANGES:*** 
+* Version 3.0.0 includes _a lot_ of changes from the 2.x line, including a few that break the API.  We've tried to break as few things as possible, so there should just be a few type signature changes.  A full list of breaking changes is available in `VERSION_HISTORY.md`.  See `MIGRATION_GUIDE.md` for more information on updating your code.
+
+## Usage Tips
+
+### Signing vs Encryption
+
+A token is simply a JSON object that is signed by its author. this tells you exactly two things about the data:
+
+* The author of the token was in the possession of the signing secret
+* The data has not been modified since it was signed
+
+It's important to know that JWT does not provide encryption, which means anyone who has access to the token can read its contents. If you need to protect (encrypt) the data, there is a companion spec, `JWE`, that provides this functionality. JWE is currently outside the scope of this library.
+
+### Choosing a Signing Method
+
+There are several signing methods available, and you should probably take the time to learn about the various options before choosing one.  The principal design decision is most likely going to be symmetric vs asymmetric.
+
+Symmetric signing methods, such as HSA, use only a single secret. This is probably the simplest signing method to use since any `[]byte` can be used as a valid secret. They are also slightly computationally faster to use, though this rarely is enough to matter. Symmetric signing methods work the best when both producers and consumers of tokens are trusted, or even the same system. Since the same secret is used to both sign and validate tokens, you can't easily distribute the key for validation.
+
+Asymmetric signing methods, such as RSA, use different keys for signing and verifying tokens. This makes it possible to produce tokens with a private key, and allow any consumer to access the public key for verification.
+
+### Signing Methods and Key Types
+
+Each signing method expects a different object type for its signing keys. See the package documentation for details. Here are the most common ones:
+
+* The [HMAC signing method](https://godoc.org/github.com/dgrijalva/jwt-go#SigningMethodHMAC) (`HS256`,`HS384`,`HS512`) expect `[]byte` values for signing and validation
+* The [RSA signing method](https://godoc.org/github.com/dgrijalva/jwt-go#SigningMethodRSA) (`RS256`,`RS384`,`RS512`) expect `*rsa.PrivateKey` for signing and `*rsa.PublicKey` for validation
+* The [ECDSA signing method](https://godoc.org/github.com/dgrijalva/jwt-go#SigningMethodECDSA) (`ES256`,`ES384`,`ES512`) expect `*ecdsa.PrivateKey` for signing and `*ecdsa.PublicKey` for validation
+
+### JWT and OAuth
+
+It's worth mentioning that OAuth and JWT are not the same thing. A JWT token is simply a signed JSON object. It can be used anywhere such a thing is useful. There is some confusion, though, as JWT is the most common type of bearer token used in OAuth2 authentication.
+
+Without going too far down the rabbit hole, here's a description of the interaction of these technologies:
+
+* OAuth is a protocol for allowing an identity provider to be separate from the service a user is logging in to. For example, whenever you use Facebook to log into a different service (Yelp, Spotify, etc), you are using OAuth.
+* OAuth defines several options for passing around authentication data. One popular method is called a "bearer token". A bearer token is simply a string that _should_ only be held by an authenticated user. Thus, simply presenting this token proves your identity. You can probably derive from here why a JWT might make a good bearer token.
+* Because bearer tokens are used for authentication, it's important they're kept secret. This is why transactions that use bearer tokens typically happen over SSL.
+
+## More
+
+Documentation can be found [on godoc.org](http://godoc.org/github.com/dgrijalva/jwt-go).
+
+The command line utility included in this project (cmd/jwt) provides a straightforward example of token creation and parsing as well as a useful tool for debugging your own integration. You'll also find several implementation examples in the documentation.

services/tiktak/vendor/github.com/dgrijalva/jwt-go/VERSION_HISTORY.md

@@ -0,0 +1,118 @@
+## `jwt-go` Version History
+
+#### 3.2.0
+
+* Added method `ParseUnverified` to allow users to split up the tasks of parsing and validation
+* HMAC signing method returns `ErrInvalidKeyType` instead of `ErrInvalidKey` where appropriate
+* Added options to `request.ParseFromRequest`, which allows for an arbitrary list of modifiers to parsing behavior. Initial set include `WithClaims` and `WithParser`. Existing usage of this function will continue to work as before.
+* Deprecated `ParseFromRequestWithClaims` to simplify API in the future.
+
+#### 3.1.0
+
+* Improvements to `jwt` command line tool
+* Added `SkipClaimsValidation` option to `Parser`
+* Documentation updates
+
+#### 3.0.0
+
+* **Compatibility Breaking Changes**: See MIGRATION_GUIDE.md for tips on updating your code
+	* Dropped support for `[]byte` keys when using RSA signing methods.  This convenience feature could contribute to security vulnerabilities involving mismatched key types with signing methods.
+	* `ParseFromRequest` has been moved to `request` subpackage and usage has changed
+	* The `Claims` property on `Token` is now type `Claims` instead of `map[string]interface{}`.  The default value is type `MapClaims`, which is an alias to `map[string]interface{}`.  This makes it possible to use a custom type when decoding claims.
+* Other Additions and Changes
+	* Added `Claims` interface type to allow users to decode the claims into a custom type
+	* Added `ParseWithClaims`, which takes a third argument of type `Claims`.  Use this function instead of `Parse` if you have a custom type you'd like to decode into.
+	* Dramatically improved the functionality and flexibility of `ParseFromRequest`, which is now in the `request` subpackage
+	* Added `ParseFromRequestWithClaims` which is the `FromRequest` equivalent of `ParseWithClaims`
+	* Added new interface type `Extractor`, which is used for extracting JWT strings from http requests.  Used with `ParseFromRequest` and `ParseFromRequestWithClaims`.
+	* Added several new, more specific, validation errors to error type bitmask
+	* Moved examples from README to executable example files
+	* Signing method registry is now thread safe
+	* Added new property to `ValidationError`, which contains the raw error returned by calls made by parse/verify (such as those returned by keyfunc or json parser)
+
+#### 2.7.0
+
+This will likely be the last backwards compatible release before 3.0.0, excluding essential bug fixes.
+
+* Added new option `-show` to the `jwt` command that will just output the decoded token without verifying
+* Error text for expired tokens includes how long it's been expired
+* Fixed incorrect error returned from `ParseRSAPublicKeyFromPEM`
+* Documentation updates
+
+#### 2.6.0
+
+* Exposed inner error within ValidationError
+* Fixed validation errors when using UseJSONNumber flag
+* Added several unit tests
+
+#### 2.5.0
+
+* Added support for signing method none.  You shouldn't use this.  The API tries to make this clear.
+* Updated/fixed some documentation
+* Added more helpful error message when trying to parse tokens that begin with `BEARER `
+
+#### 2.4.0
+
+* Added new type, Parser, to allow for configuration of various parsing parameters
+	* You can now specify a list of valid signing methods.  Anything outside this set will be rejected.
+	* You can now opt to use the `json.Number` type instead of `float64` when parsing token JSON
+* Added support for [Travis CI](https://travis-ci.org/dgrijalva/jwt-go)
+* Fixed some bugs with ECDSA parsing
+
+#### 2.3.0
+
+* Added support for ECDSA signing methods
+* Added support for RSA PSS signing methods (requires go v1.4)
+
+#### 2.2.0
+
+* Gracefully handle a `nil` `Keyfunc` being passed to `Parse`.  Result will now be the parsed token and an error, instead of a panic.
+
+#### 2.1.0
+
+Backwards compatible API change that was missed in 2.0.0.
+
+* The `SignedString` method on `Token` now takes `interface{}` instead of `[]byte`
+
+#### 2.0.0
+
+There were two major reasons for breaking backwards compatibility with this update.  The first was a refactor required to expand the width of the RSA and HMAC-SHA signing implementations.  There will likely be no required code changes to support this change.
+
+The second update, while unfortunately requiring a small change in integration, is required to open up this library to other signing methods.  Not all keys used for all signing methods have a single standard on-disk representation.  Requiring `[]byte` as the type for all keys proved too limiting.  Additionally, this implementation allows for pre-parsed tokens to be reused, which might matter in an application that parses a high volume of tokens with a small set of keys.  Backwards compatibilty has been maintained for passing `[]byte` to the RSA signing methods, but they will also accept `*rsa.PublicKey` and `*rsa.PrivateKey`.
+
+It is likely the only integration change required here will be to change `func(t *jwt.Token) ([]byte, error)` to `func(t *jwt.Token) (interface{}, error)` when calling `Parse`.
+
+* **Compatibility Breaking Changes**
+	* `SigningMethodHS256` is now `*SigningMethodHMAC` instead of `type struct`
+	* `SigningMethodRS256` is now `*SigningMethodRSA` instead of `type struct`
+	* `KeyFunc` now returns `interface{}` instead of `[]byte`
+	* `SigningMethod.Sign` now takes `interface{}` instead of `[]byte` for the key
+	* `SigningMethod.Verify` now takes `interface{}` instead of `[]byte` for the key
+* Renamed type `SigningMethodHS256` to `SigningMethodHMAC`.  Specific sizes are now just instances of this type.
+    * Added public package global `SigningMethodHS256`
+    * Added public package global `SigningMethodHS384`
+    * Added public package global `SigningMethodHS512`
+* Renamed type `SigningMethodRS256` to `SigningMethodRSA`.  Specific sizes are now just instances of this type.
+    * Added public package global `SigningMethodRS256`
+    * Added public package global `SigningMethodRS384`
+    * Added public package global `SigningMethodRS512`
+* Moved sample private key for HMAC tests from an inline value to a file on disk.  Value is unchanged.
+* Refactored the RSA implementation to be easier to read
+* Exposed helper methods `ParseRSAPrivateKeyFromPEM` and `ParseRSAPublicKeyFromPEM`
+
+#### 1.0.2
+
+* Fixed bug in parsing public keys from certificates
+* Added more tests around the parsing of keys for RS256
+* Code refactoring in RS256 implementation.  No functional changes
+
+#### 1.0.1
+
+* Fixed panic if RS256 signing method was passed an invalid key
+
+#### 1.0.0
+
+* First versioned release
+* API stabilized
+* Supports creating, signing, parsing, and validating JWT tokens
+* Supports RS256 and HS256 signing methods

services/tiktak/vendor/github.com/dgrijalva/jwt-go/claims.go

@@ -0,0 +1,134 @@
+package jwt
+
+import (
+	"crypto/subtle"
+	"fmt"
+	"time"
+)
+
+// For a type to be a Claims object, it must just have a Valid method that determines
+// if the token is invalid for any supported reason
+type Claims interface {
+	Valid() error
+}
+
+// Structured version of Claims Section, as referenced at
+// https://tools.ietf.org/html/rfc7519#section-4.1
+// See examples for how to use this with your own claim types
+type StandardClaims struct {
+	Audience  string `json:"aud,omitempty"`
+	ExpiresAt int64  `json:"exp,omitempty"`
+	Id        string `json:"jti,omitempty"`
+	IssuedAt  int64  `json:"iat,omitempty"`
+	Issuer    string `json:"iss,omitempty"`
+	NotBefore int64  `json:"nbf,omitempty"`
+	Subject   string `json:"sub,omitempty"`
+}
+
+// Validates time based claims "exp, iat, nbf".
+// There is no accounting for clock skew.
+// As well, if any of the above claims are not in the token, it will still
+// be considered a valid claim.
+func (c StandardClaims) Valid() error {
+	vErr := new(ValidationError)
+	now := TimeFunc().Unix()
+
+	// The claims below are optional, by default, so if they are set to the
+	// default value in Go, let's not fail the verification for them.
+	if c.VerifyExpiresAt(now, false) == false {
+		delta := time.Unix(now, 0).Sub(time.Unix(c.ExpiresAt, 0))
+		vErr.Inner = fmt.Errorf("token is expired by %v", delta)
+		vErr.Errors |= ValidationErrorExpired
+	}
+
+	if c.VerifyIssuedAt(now, false) == false {
+		vErr.Inner = fmt.Errorf("Token used before issued")
+		vErr.Errors |= ValidationErrorIssuedAt
+	}
+
+	if c.VerifyNotBefore(now, false) == false {
+		vErr.Inner = fmt.Errorf("token is not valid yet")
+		vErr.Errors |= ValidationErrorNotValidYet
+	}
+
+	if vErr.valid() {
+		return nil
+	}
+
+	return vErr
+}
+
+// Compares the aud claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (c *StandardClaims) VerifyAudience(cmp string, req bool) bool {
+	return verifyAud(c.Audience, cmp, req)
+}
+
+// Compares the exp claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (c *StandardClaims) VerifyExpiresAt(cmp int64, req bool) bool {
+	return verifyExp(c.ExpiresAt, cmp, req)
+}
+
+// Compares the iat claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (c *StandardClaims) VerifyIssuedAt(cmp int64, req bool) bool {
+	return verifyIat(c.IssuedAt, cmp, req)
+}
+
+// Compares the iss claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (c *StandardClaims) VerifyIssuer(cmp string, req bool) bool {
+	return verifyIss(c.Issuer, cmp, req)
+}
+
+// Compares the nbf claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (c *StandardClaims) VerifyNotBefore(cmp int64, req bool) bool {
+	return verifyNbf(c.NotBefore, cmp, req)
+}
+
+// ----- helpers
+
+func verifyAud(aud string, cmp string, required bool) bool {
+	if aud == "" {
+		return !required
+	}
+	if subtle.ConstantTimeCompare([]byte(aud), []byte(cmp)) != 0 {
+		return true
+	} else {
+		return false
+	}
+}
+
+func verifyExp(exp int64, now int64, required bool) bool {
+	if exp == 0 {
+		return !required
+	}
+	return now <= exp
+}
+
+func verifyIat(iat int64, now int64, required bool) bool {
+	if iat == 0 {
+		return !required
+	}
+	return now >= iat
+}
+
+func verifyIss(iss string, cmp string, required bool) bool {
+	if iss == "" {
+		return !required
+	}
+	if subtle.ConstantTimeCompare([]byte(iss), []byte(cmp)) != 0 {
+		return true
+	} else {
+		return false
+	}
+}
+
+func verifyNbf(nbf int64, now int64, required bool) bool {
+	if nbf == 0 {
+		return !required
+	}
+	return now >= nbf
+}

services/tiktak/vendor/github.com/dgrijalva/jwt-go/doc.go

@@ -0,0 +1,4 @@
+// Package jwt is a Go implementation of JSON Web Tokens: http://self-issued.info/docs/draft-jones-json-web-token.html
+//
+// See README.md for more info.
+package jwt

services/tiktak/vendor/github.com/dgrijalva/jwt-go/ecdsa.go

@@ -0,0 +1,148 @@
+package jwt
+
+import (
+	"crypto"
+	"crypto/ecdsa"
+	"crypto/rand"
+	"errors"
+	"math/big"
+)
+
+var (
+	// Sadly this is missing from crypto/ecdsa compared to crypto/rsa
+	ErrECDSAVerification = errors.New("crypto/ecdsa: verification error")
+)
+
+// Implements the ECDSA family of signing methods signing methods
+// Expects *ecdsa.PrivateKey for signing and *ecdsa.PublicKey for verification
+type SigningMethodECDSA struct {
+	Name      string
+	Hash      crypto.Hash
+	KeySize   int
+	CurveBits int
+}
+
+// Specific instances for EC256 and company
+var (
+	SigningMethodES256 *SigningMethodECDSA
+	SigningMethodES384 *SigningMethodECDSA
+	SigningMethodES512 *SigningMethodECDSA
+)
+
+func init() {
+	// ES256
+	SigningMethodES256 = &SigningMethodECDSA{"ES256", crypto.SHA256, 32, 256}
+	RegisterSigningMethod(SigningMethodES256.Alg(), func() SigningMethod {
+		return SigningMethodES256
+	})
+
+	// ES384
+	SigningMethodES384 = &SigningMethodECDSA{"ES384", crypto.SHA384, 48, 384}
+	RegisterSigningMethod(SigningMethodES384.Alg(), func() SigningMethod {
+		return SigningMethodES384
+	})
+
+	// ES512
+	SigningMethodES512 = &SigningMethodECDSA{"ES512", crypto.SHA512, 66, 521}
+	RegisterSigningMethod(SigningMethodES512.Alg(), func() SigningMethod {
+		return SigningMethodES512
+	})
+}
+
+func (m *SigningMethodECDSA) Alg() string {
+	return m.Name
+}
+
+// Implements the Verify method from SigningMethod
+// For this verify method, key must be an ecdsa.PublicKey struct
+func (m *SigningMethodECDSA) Verify(signingString, signature string, key interface{}) error {
+	var err error
+
+	// Decode the signature
+	var sig []byte
+	if sig, err = DecodeSegment(signature); err != nil {
+		return err
+	}
+
+	// Get the key
+	var ecdsaKey *ecdsa.PublicKey
+	switch k := key.(type) {
+	case *ecdsa.PublicKey:
+		ecdsaKey = k
+	default:
+		return ErrInvalidKeyType
+	}
+
+	if len(sig) != 2*m.KeySize {
+		return ErrECDSAVerification
+	}
+
+	r := big.NewInt(0).SetBytes(sig[:m.KeySize])
+	s := big.NewInt(0).SetBytes(sig[m.KeySize:])
+
+	// Create hasher
+	if !m.Hash.Available() {
+		return ErrHashUnavailable
+	}
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	// Verify the signature
+	if verifystatus := ecdsa.Verify(ecdsaKey, hasher.Sum(nil), r, s); verifystatus == true {
+		return nil
+	} else {
+		return ErrECDSAVerification
+	}
+}
+
+// Implements the Sign method from SigningMethod
+// For this signing method, key must be an ecdsa.PrivateKey struct
+func (m *SigningMethodECDSA) Sign(signingString string, key interface{}) (string, error) {
+	// Get the key
+	var ecdsaKey *ecdsa.PrivateKey
+	switch k := key.(type) {
+	case *ecdsa.PrivateKey:
+		ecdsaKey = k
+	default:
+		return "", ErrInvalidKeyType
+	}
+
+	// Create the hasher
+	if !m.Hash.Available() {
+		return "", ErrHashUnavailable
+	}
+
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	// Sign the string and return r, s
+	if r, s, err := ecdsa.Sign(rand.Reader, ecdsaKey, hasher.Sum(nil)); err == nil {
+		curveBits := ecdsaKey.Curve.Params().BitSize
+
+		if m.CurveBits != curveBits {
+			return "", ErrInvalidKey
+		}
+
+		keyBytes := curveBits / 8
+		if curveBits%8 > 0 {
+			keyBytes += 1
+		}
+
+		// We serialize the outpus (r and s) into big-endian byte arrays and pad
+		// them with zeros on the left to make sure the sizes work out. Both arrays
+		// must be keyBytes long, and the output must be 2*keyBytes long.
+		rBytes := r.Bytes()
+		rBytesPadded := make([]byte, keyBytes)
+		copy(rBytesPadded[keyBytes-len(rBytes):], rBytes)
+
+		sBytes := s.Bytes()
+		sBytesPadded := make([]byte, keyBytes)
+		copy(sBytesPadded[keyBytes-len(sBytes):], sBytes)
+
+		out := append(rBytesPadded, sBytesPadded...)
+
+		return EncodeSegment(out), nil
+	} else {
+		return "", err
+	}
+}

services/tiktak/vendor/github.com/dgrijalva/jwt-go/ecdsa_utils.go

@@ -0,0 +1,67 @@
+package jwt
+
+import (
+	"crypto/ecdsa"
+	"crypto/x509"
+	"encoding/pem"
+	"errors"
+)
+
+var (
+	ErrNotECPublicKey  = errors.New("Key is not a valid ECDSA public key")
+	ErrNotECPrivateKey = errors.New("Key is not a valid ECDSA private key")
+)
+
+// Parse PEM encoded Elliptic Curve Private Key Structure
+func ParseECPrivateKeyFromPEM(key []byte) (*ecdsa.PrivateKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	// Parse the key
+	var parsedKey interface{}
+	if parsedKey, err = x509.ParseECPrivateKey(block.Bytes); err != nil {
+		return nil, err
+	}
+
+	var pkey *ecdsa.PrivateKey
+	var ok bool
+	if pkey, ok = parsedKey.(*ecdsa.PrivateKey); !ok {
+		return nil, ErrNotECPrivateKey
+	}
+
+	return pkey, nil
+}
+
+// Parse PEM encoded PKCS1 or PKCS8 public key
+func ParseECPublicKeyFromPEM(key []byte) (*ecdsa.PublicKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	// Parse the key
+	var parsedKey interface{}
+	if parsedKey, err = x509.ParsePKIXPublicKey(block.Bytes); err != nil {
+		if cert, err := x509.ParseCertificate(block.Bytes); err == nil {
+			parsedKey = cert.PublicKey
+		} else {
+			return nil, err
+		}
+	}
+
+	var pkey *ecdsa.PublicKey
+	var ok bool
+	if pkey, ok = parsedKey.(*ecdsa.PublicKey); !ok {
+		return nil, ErrNotECPublicKey
+	}
+
+	return pkey, nil
+}

services/tiktak/vendor/github.com/dgrijalva/jwt-go/errors.go

@@ -0,0 +1,59 @@
+package jwt
+
+import (
+	"errors"
+)
+
+// Error constants
+var (
+	ErrInvalidKey      = errors.New("key is invalid")
+	ErrInvalidKeyType  = errors.New("key is of invalid type")
+	ErrHashUnavailable = errors.New("the requested hash function is unavailable")
+)
+
+// The errors that might occur when parsing and validating a token
+const (
+	ValidationErrorMalformed        uint32 = 1 << iota // Token is malformed
+	ValidationErrorUnverifiable                        // Token could not be verified because of signing problems
+	ValidationErrorSignatureInvalid                    // Signature validation failed
+
+	// Standard Claim validation errors
+	ValidationErrorAudience      // AUD validation failed
+	ValidationErrorExpired       // EXP validation failed
+	ValidationErrorIssuedAt      // IAT validation failed
+	ValidationErrorIssuer        // ISS validation failed
+	ValidationErrorNotValidYet   // NBF validation failed
+	ValidationErrorId            // JTI validation failed
+	ValidationErrorClaimsInvalid // Generic claims validation error
+)
+
+// Helper for constructing a ValidationError with a string error message
+func NewValidationError(errorText string, errorFlags uint32) *ValidationError {
+	return &ValidationError{
+		text:   errorText,
+		Errors: errorFlags,
+	}
+}
+
+// The error from Parse if token is not valid
+type ValidationError struct {
+	Inner  error  // stores the error returned by external dependencies, i.e.: KeyFunc
+	Errors uint32 // bitfield.  see ValidationError... constants
+	text   string // errors that do not have a valid error just have text
+}
+
+// Validation error is an error type
+func (e ValidationError) Error() string {
+	if e.Inner != nil {
+		return e.Inner.Error()
+	} else if e.text != "" {
+		return e.text
+	} else {
+		return "token is invalid"
+	}
+}
+
+// No errors
+func (e *ValidationError) valid() bool {
+	return e.Errors == 0
+}

services/tiktak/vendor/github.com/dgrijalva/jwt-go/hmac.go

@@ -0,0 +1,95 @@
+package jwt
+
+import (
+	"crypto"
+	"crypto/hmac"
+	"errors"
+)
+
+// Implements the HMAC-SHA family of signing methods signing methods
+// Expects key type of []byte for both signing and validation
+type SigningMethodHMAC struct {
+	Name string
+	Hash crypto.Hash
+}
+
+// Specific instances for HS256 and company
+var (
+	SigningMethodHS256  *SigningMethodHMAC
+	SigningMethodHS384  *SigningMethodHMAC
+	SigningMethodHS512  *SigningMethodHMAC
+	ErrSignatureInvalid = errors.New("signature is invalid")
+)
+
+func init() {
+	// HS256
+	SigningMethodHS256 = &SigningMethodHMAC{"HS256", crypto.SHA256}
+	RegisterSigningMethod(SigningMethodHS256.Alg(), func() SigningMethod {
+		return SigningMethodHS256
+	})
+
+	// HS384
+	SigningMethodHS384 = &SigningMethodHMAC{"HS384", crypto.SHA384}
+	RegisterSigningMethod(SigningMethodHS384.Alg(), func() SigningMethod {
+		return SigningMethodHS384
+	})
+
+	// HS512
+	SigningMethodHS512 = &SigningMethodHMAC{"HS512", crypto.SHA512}
+	RegisterSigningMethod(SigningMethodHS512.Alg(), func() SigningMethod {
+		return SigningMethodHS512
+	})
+}
+
+func (m *SigningMethodHMAC) Alg() string {
+	return m.Name
+}
+
+// Verify the signature of HSXXX tokens.  Returns nil if the signature is valid.
+func (m *SigningMethodHMAC) Verify(signingString, signature string, key interface{}) error {
+	// Verify the key is the right type
+	keyBytes, ok := key.([]byte)
+	if !ok {
+		return ErrInvalidKeyType
+	}
+
+	// Decode signature, for comparison
+	sig, err := DecodeSegment(signature)
+	if err != nil {
+		return err
+	}
+
+	// Can we use the specified hashing method?
+	if !m.Hash.Available() {
+		return ErrHashUnavailable
+	}
+
+	// This signing method is symmetric, so we validate the signature
+	// by reproducing the signature from the signing string and key, then
+	// comparing that against the provided signature.
+	hasher := hmac.New(m.Hash.New, keyBytes)
+	hasher.Write([]byte(signingString))
+	if !hmac.Equal(sig, hasher.Sum(nil)) {
+		return ErrSignatureInvalid
+	}
+
+	// No validation errors.  Signature is good.
+	return nil
+}
+
+// Implements the Sign method from SigningMethod for this signing method.
+// Key must be []byte
+func (m *SigningMethodHMAC) Sign(signingString string, key interface{}) (string, error) {
+	if keyBytes, ok := key.([]byte); ok {
+		if !m.Hash.Available() {
+			return "", ErrHashUnavailable
+		}
+
+		hasher := hmac.New(m.Hash.New, keyBytes)
+		hasher.Write([]byte(signingString))
+
+		return EncodeSegment(hasher.Sum(nil)), nil
+	}
+
+	return "", ErrInvalidKeyType
+}

services/tiktak/vendor/github.com/dgrijalva/jwt-go/map_claims.go

@@ -0,0 +1,94 @@
+package jwt
+
+import (
+	"encoding/json"
+	"errors"
+	// "fmt"
+)
+
+// Claims type that uses the map[string]interface{} for JSON decoding
+// This is the default claims type if you don't supply one
+type MapClaims map[string]interface{}
+
+// Compares the aud claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (m MapClaims) VerifyAudience(cmp string, req bool) bool {
+	aud, _ := m["aud"].(string)
+	return verifyAud(aud, cmp, req)
+}
+
+// Compares the exp claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (m MapClaims) VerifyExpiresAt(cmp int64, req bool) bool {
+	switch exp := m["exp"].(type) {
+	case float64:
+		return verifyExp(int64(exp), cmp, req)
+	case json.Number:
+		v, _ := exp.Int64()
+		return verifyExp(v, cmp, req)
+	}
+	return req == false
+}
+
+// Compares the iat claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (m MapClaims) VerifyIssuedAt(cmp int64, req bool) bool {
+	switch iat := m["iat"].(type) {
+	case float64:
+		return verifyIat(int64(iat), cmp, req)
+	case json.Number:
+		v, _ := iat.Int64()
+		return verifyIat(v, cmp, req)
+	}
+	return req == false
+}
+
+// Compares the iss claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (m MapClaims) VerifyIssuer(cmp string, req bool) bool {
+	iss, _ := m["iss"].(string)
+	return verifyIss(iss, cmp, req)
+}
+
+// Compares the nbf claim against cmp.
+// If required is false, this method will return true if the value matches or is unset
+func (m MapClaims) VerifyNotBefore(cmp int64, req bool) bool {
+	switch nbf := m["nbf"].(type) {
+	case float64:
+		return verifyNbf(int64(nbf), cmp, req)
+	case json.Number:
+		v, _ := nbf.Int64()
+		return verifyNbf(v, cmp, req)
+	}
+	return req == false
+}
+
+// Validates time based claims "exp, iat, nbf".
+// There is no accounting for clock skew.
+// As well, if any of the above claims are not in the token, it will still
+// be considered a valid claim.
+func (m MapClaims) Valid() error {
+	vErr := new(ValidationError)
+	now := TimeFunc().Unix()
+
+	if m.VerifyExpiresAt(now, false) == false {
+		vErr.Inner = errors.New("Token is expired")
+		vErr.Errors |= ValidationErrorExpired
+	}
+
+	if m.VerifyIssuedAt(now, false) == false {
+		vErr.Inner = errors.New("Token used before issued")
+		vErr.Errors |= ValidationErrorIssuedAt
+	}
+
+	if m.VerifyNotBefore(now, false) == false {
+		vErr.Inner = errors.New("Token is not valid yet")
+		vErr.Errors |= ValidationErrorNotValidYet
+	}
+
+	if vErr.valid() {
+		return nil
+	}
+
+	return vErr
+}

services/tiktak/vendor/github.com/dgrijalva/jwt-go/none.go

@@ -0,0 +1,52 @@
+package jwt
+
+// Implements the none signing method.  This is required by the spec
+// but you probably should never use it.
+var SigningMethodNone *signingMethodNone
+
+const UnsafeAllowNoneSignatureType unsafeNoneMagicConstant = "none signing method allowed"
+
+var NoneSignatureTypeDisallowedError error
+
+type signingMethodNone struct{}
+type unsafeNoneMagicConstant string
+
+func init() {
+	SigningMethodNone = &signingMethodNone{}
+	NoneSignatureTypeDisallowedError = NewValidationError("'none' signature type is not allowed", ValidationErrorSignatureInvalid)
+
+	RegisterSigningMethod(SigningMethodNone.Alg(), func() SigningMethod {
+		return SigningMethodNone
+	})
+}
+
+func (m *signingMethodNone) Alg() string {
+	return "none"
+}
+
+// Only allow 'none' alg type if UnsafeAllowNoneSignatureType is specified as the key
+func (m *signingMethodNone) Verify(signingString, signature string, key interface{}) (err error) {
+	// Key must be UnsafeAllowNoneSignatureType to prevent accidentally
+	// accepting 'none' signing method
+	if _, ok := key.(unsafeNoneMagicConstant); !ok {
+		return NoneSignatureTypeDisallowedError
+	}
+	// If signing method is none, signature must be an empty string
+	if signature != "" {
+		return NewValidationError(
+			"'none' signing method with non-empty signature",
+			ValidationErrorSignatureInvalid,
+		)
+	}
+
+	// Accept 'none' signing method.
+	return nil
+}
+
+// Only allow 'none' signing if UnsafeAllowNoneSignatureType is specified as the key
+func (m *signingMethodNone) Sign(signingString string, key interface{}) (string, error) {
+	if _, ok := key.(unsafeNoneMagicConstant); ok {
+		return "", nil
+	}
+	return "", NoneSignatureTypeDisallowedError
+}

services/tiktak/vendor/github.com/dgrijalva/jwt-go/parser.go

@@ -0,0 +1,148 @@
+package jwt
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"strings"
+)
+
+type Parser struct {
+	ValidMethods         []string // If populated, only these methods will be considered valid
+	UseJSONNumber        bool     // Use JSON Number format in JSON decoder
+	SkipClaimsValidation bool     // Skip claims validation during token parsing
+}
+
+// Parse, validate, and return a token.
+// keyFunc will receive the parsed token and should return the key for validating.
+// If everything is kosher, err will be nil
+func (p *Parser) Parse(tokenString string, keyFunc Keyfunc) (*Token, error) {
+	return p.ParseWithClaims(tokenString, MapClaims{}, keyFunc)
+}
+
+func (p *Parser) ParseWithClaims(tokenString string, claims Claims, keyFunc Keyfunc) (*Token, error) {
+	token, parts, err := p.ParseUnverified(tokenString, claims)
+	if err != nil {
+		return token, err
+	}
+
+	// Verify signing method is in the required set
+	if p.ValidMethods != nil {
+		var signingMethodValid = false
+		var alg = token.Method.Alg()
+		for _, m := range p.ValidMethods {
+			if m == alg {
+				signingMethodValid = true
+				break
+			}
+		}
+		if !signingMethodValid {
+			// signing method is not in the listed set
+			return token, NewValidationError(fmt.Sprintf("signing method %v is invalid", alg), ValidationErrorSignatureInvalid)
+		}
+	}
+
+	// Lookup key
+	var key interface{}
+	if keyFunc == nil {
+		// keyFunc was not provided.  short circuiting validation
+		return token, NewValidationError("no Keyfunc was provided.", ValidationErrorUnverifiable)
+	}
+	if key, err = keyFunc(token); err != nil {
+		// keyFunc returned an error
+		if ve, ok := err.(*ValidationError); ok {
+			return token, ve
+		}
+		return token, &ValidationError{Inner: err, Errors: ValidationErrorUnverifiable}
+	}
+
+	vErr := &ValidationError{}
+
+	// Validate Claims
+	if !p.SkipClaimsValidation {
+		if err := token.Claims.Valid(); err != nil {
+
+			// If the Claims Valid returned an error, check if it is a validation error,
+			// If it was another error type, create a ValidationError with a generic ClaimsInvalid flag set
+			if e, ok := err.(*ValidationError); !ok {
+				vErr = &ValidationError{Inner: err, Errors: ValidationErrorClaimsInvalid}
+			} else {
+				vErr = e
+			}
+		}
+	}
+
+	// Perform validation
+	token.Signature = parts[2]
+	if err = token.Method.Verify(strings.Join(parts[0:2], "."), token.Signature, key); err != nil {
+		vErr.Inner = err
+		vErr.Errors |= ValidationErrorSignatureInvalid
+	}
+
+	if vErr.valid() {
+		token.Valid = true
+		return token, nil
+	}
+
+	return token, vErr
+}
+
+// WARNING: Don't use this method unless you know what you're doing
+//
+// This method parses the token but doesn't validate the signature. It's only
+// ever useful in cases where you know the signature is valid (because it has
+// been checked previously in the stack) and you want to extract values from
+// it.
+func (p *Parser) ParseUnverified(tokenString string, claims Claims) (token *Token, parts []string, err error) {
+	parts = strings.Split(tokenString, ".")
+	if len(parts) != 3 {
+		return nil, parts, NewValidationError("token contains an invalid number of segments", ValidationErrorMalformed)
+	}
+
+	token = &Token{Raw: tokenString}
+
+	// parse Header
+	var headerBytes []byte
+	if headerBytes, err = DecodeSegment(parts[0]); err != nil {
+		if strings.HasPrefix(strings.ToLower(tokenString), "bearer ") {
+			return token, parts, NewValidationError("tokenstring should not contain 'bearer '", ValidationErrorMalformed)
+		}
+		return token, parts, &ValidationError{Inner: err, Errors: ValidationErrorMalformed}
+	}
+	if err = json.Unmarshal(headerBytes, &token.Header); err != nil {
+		return token, parts, &ValidationError{Inner: err, Errors: ValidationErrorMalformed}
+	}
+
+	// parse Claims
+	var claimBytes []byte
+	token.Claims = claims
+
+	if claimBytes, err = DecodeSegment(parts[1]); err != nil {
+		return token, parts, &ValidationError{Inner: err, Errors: ValidationErrorMalformed}
+	}
+	dec := json.NewDecoder(bytes.NewBuffer(claimBytes))
+	if p.UseJSONNumber {
+		dec.UseNumber()
+	}
+	// JSON Decode.  Special case for map type to avoid weird pointer behavior
+	if c, ok := token.Claims.(MapClaims); ok {
+		err = dec.Decode(&c)
+	} else {
+		err = dec.Decode(&claims)
+	}
+	// Handle decode error
+	if err != nil {
+		return token, parts, &ValidationError{Inner: err, Errors: ValidationErrorMalformed}
+	}
+
+	// Lookup signature method
+	if method, ok := token.Header["alg"].(string); ok {
+		if token.Method = GetSigningMethod(method); token.Method == nil {
+			return token, parts, NewValidationError("signing method (alg) is unavailable.", ValidationErrorUnverifiable)
+		}
+	} else {
+		return token, parts, NewValidationError("signing method (alg) is unspecified.", ValidationErrorUnverifiable)
+	}
+
+	return token, parts, nil
+}

services/tiktak/vendor/github.com/dgrijalva/jwt-go/rsa.go

@@ -0,0 +1,101 @@
+package jwt
+
+import (
+	"crypto"
+	"crypto/rand"
+	"crypto/rsa"
+)
+
+// Implements the RSA family of signing methods signing methods
+// Expects *rsa.PrivateKey for signing and *rsa.PublicKey for validation
+type SigningMethodRSA struct {
+	Name string
+	Hash crypto.Hash
+}
+
+// Specific instances for RS256 and company
+var (
+	SigningMethodRS256 *SigningMethodRSA
+	SigningMethodRS384 *SigningMethodRSA
+	SigningMethodRS512 *SigningMethodRSA
+)
+
+func init() {
+	// RS256
+	SigningMethodRS256 = &SigningMethodRSA{"RS256", crypto.SHA256}
+	RegisterSigningMethod(SigningMethodRS256.Alg(), func() SigningMethod {
+		return SigningMethodRS256
+	})
+
+	// RS384
+	SigningMethodRS384 = &SigningMethodRSA{"RS384", crypto.SHA384}
+	RegisterSigningMethod(SigningMethodRS384.Alg(), func() SigningMethod {
+		return SigningMethodRS384
+	})
+
+	// RS512
+	SigningMethodRS512 = &SigningMethodRSA{"RS512", crypto.SHA512}
+	RegisterSigningMethod(SigningMethodRS512.Alg(), func() SigningMethod {
+		return SigningMethodRS512
+	})
+}
+
+func (m *SigningMethodRSA) Alg() string {
+	return m.Name
+}
+
+// Implements the Verify method from SigningMethod
+// For this signing method, must be an *rsa.PublicKey structure.
+func (m *SigningMethodRSA) Verify(signingString, signature string, key interface{}) error {
+	var err error
+
+	// Decode the signature
+	var sig []byte
+	if sig, err = DecodeSegment(signature); err != nil {
+		return err
+	}
+
+	var rsaKey *rsa.PublicKey
+	var ok bool
+
+	if rsaKey, ok = key.(*rsa.PublicKey); !ok {
+		return ErrInvalidKeyType
+	}
+
+	// Create hasher
+	if !m.Hash.Available() {
+		return ErrHashUnavailable
+	}
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	// Verify the signature
+	return rsa.VerifyPKCS1v15(rsaKey, m.Hash, hasher.Sum(nil), sig)
+}
+
+// Implements the Sign method from SigningMethod
+// For this signing method, must be an *rsa.PrivateKey structure.
+func (m *SigningMethodRSA) Sign(signingString string, key interface{}) (string, error) {
+	var rsaKey *rsa.PrivateKey
+	var ok bool
+
+	// Validate type of key
+	if rsaKey, ok = key.(*rsa.PrivateKey); !ok {
+		return "", ErrInvalidKey
+	}
+
+	// Create the hasher
+	if !m.Hash.Available() {
+		return "", ErrHashUnavailable
+	}
+
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	// Sign the string and return the encoded bytes
+	if sigBytes, err := rsa.SignPKCS1v15(rand.Reader, rsaKey, m.Hash, hasher.Sum(nil)); err == nil {
+		return EncodeSegment(sigBytes), nil
+	} else {
+		return "", err
+	}
+}

services/tiktak/vendor/github.com/dgrijalva/jwt-go/rsa_pss.go

@@ -0,0 +1,126 @@
+// +build go1.4
+
+package jwt
+
+import (
+	"crypto"
+	"crypto/rand"
+	"crypto/rsa"
+)
+
+// Implements the RSAPSS family of signing methods signing methods
+type SigningMethodRSAPSS struct {
+	*SigningMethodRSA
+	Options *rsa.PSSOptions
+}
+
+// Specific instances for RS/PS and company
+var (
+	SigningMethodPS256 *SigningMethodRSAPSS
+	SigningMethodPS384 *SigningMethodRSAPSS
+	SigningMethodPS512 *SigningMethodRSAPSS
+)
+
+func init() {
+	// PS256
+	SigningMethodPS256 = &SigningMethodRSAPSS{
+		&SigningMethodRSA{
+			Name: "PS256",
+			Hash: crypto.SHA256,
+		},
+		&rsa.PSSOptions{
+			SaltLength: rsa.PSSSaltLengthAuto,
+			Hash:       crypto.SHA256,
+		},
+	}
+	RegisterSigningMethod(SigningMethodPS256.Alg(), func() SigningMethod {
+		return SigningMethodPS256
+	})
+
+	// PS384
+	SigningMethodPS384 = &SigningMethodRSAPSS{
+		&SigningMethodRSA{
+			Name: "PS384",
+			Hash: crypto.SHA384,
+		},
+		&rsa.PSSOptions{
+			SaltLength: rsa.PSSSaltLengthAuto,
+			Hash:       crypto.SHA384,
+		},
+	}
+	RegisterSigningMethod(SigningMethodPS384.Alg(), func() SigningMethod {
+		return SigningMethodPS384
+	})
+
+	// PS512
+	SigningMethodPS512 = &SigningMethodRSAPSS{
+		&SigningMethodRSA{
+			Name: "PS512",
+			Hash: crypto.SHA512,
+		},
+		&rsa.PSSOptions{
+			SaltLength: rsa.PSSSaltLengthAuto,
+			Hash:       crypto.SHA512,
+		},
+	}
+	RegisterSigningMethod(SigningMethodPS512.Alg(), func() SigningMethod {
+		return SigningMethodPS512
+	})
+}
+
+// Implements the Verify method from SigningMethod
+// For this verify method, key must be an rsa.PublicKey struct
+func (m *SigningMethodRSAPSS) Verify(signingString, signature string, key interface{}) error {
+	var err error
+
+	// Decode the signature
+	var sig []byte
+	if sig, err = DecodeSegment(signature); err != nil {
+		return err
+	}
+
+	var rsaKey *rsa.PublicKey
+	switch k := key.(type) {
+	case *rsa.PublicKey:
+		rsaKey = k
+	default:
+		return ErrInvalidKey
+	}
+
+	// Create hasher
+	if !m.Hash.Available() {
+		return ErrHashUnavailable
+	}
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	return rsa.VerifyPSS(rsaKey, m.Hash, hasher.Sum(nil), sig, m.Options)
+}
+
+// Implements the Sign method from SigningMethod
+// For this signing method, key must be an rsa.PrivateKey struct
+func (m *SigningMethodRSAPSS) Sign(signingString string, key interface{}) (string, error) {
+	var rsaKey *rsa.PrivateKey
+
+	switch k := key.(type) {
+	case *rsa.PrivateKey:
+		rsaKey = k
+	default:
+		return "", ErrInvalidKeyType
+	}
+
+	// Create the hasher
+	if !m.Hash.Available() {
+		return "", ErrHashUnavailable
+	}
+
+	hasher := m.Hash.New()
+	hasher.Write([]byte(signingString))
+
+	// Sign the string and return the encoded bytes
+	if sigBytes, err := rsa.SignPSS(rand.Reader, rsaKey, m.Hash, hasher.Sum(nil), m.Options); err == nil {
+		return EncodeSegment(sigBytes), nil
+	} else {
+		return "", err
+	}
+}

services/tiktak/vendor/github.com/dgrijalva/jwt-go/rsa_utils.go

@@ -0,0 +1,101 @@
+package jwt
+
+import (
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/pem"
+	"errors"
+)
+
+var (
+	ErrKeyMustBePEMEncoded = errors.New("Invalid Key: Key must be PEM encoded PKCS1 or PKCS8 private key")
+	ErrNotRSAPrivateKey    = errors.New("Key is not a valid RSA private key")
+	ErrNotRSAPublicKey     = errors.New("Key is not a valid RSA public key")
+)
+
+// Parse PEM encoded PKCS1 or PKCS8 private key
+func ParseRSAPrivateKeyFromPEM(key []byte) (*rsa.PrivateKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	var parsedKey interface{}
+	if parsedKey, err = x509.ParsePKCS1PrivateKey(block.Bytes); err != nil {
+		if parsedKey, err = x509.ParsePKCS8PrivateKey(block.Bytes); err != nil {
+			return nil, err
+		}
+	}
+
+	var pkey *rsa.PrivateKey
+	var ok bool
+	if pkey, ok = parsedKey.(*rsa.PrivateKey); !ok {
+		return nil, ErrNotRSAPrivateKey
+	}
+
+	return pkey, nil
+}
+
+// Parse PEM encoded PKCS1 or PKCS8 private key protected with password
+func ParseRSAPrivateKeyFromPEMWithPassword(key []byte, password string) (*rsa.PrivateKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	var parsedKey interface{}
+
+	var blockDecrypted []byte
+	if blockDecrypted, err = x509.DecryptPEMBlock(block, []byte(password)); err != nil {
+		return nil, err
+	}
+
+	if parsedKey, err = x509.ParsePKCS1PrivateKey(blockDecrypted); err != nil {
+		if parsedKey, err = x509.ParsePKCS8PrivateKey(blockDecrypted); err != nil {
+			return nil, err
+		}
+	}
+
+	var pkey *rsa.PrivateKey
+	var ok bool
+	if pkey, ok = parsedKey.(*rsa.PrivateKey); !ok {
+		return nil, ErrNotRSAPrivateKey
+	}
+
+	return pkey, nil
+}
+
+// Parse PEM encoded PKCS1 or PKCS8 public key
+func ParseRSAPublicKeyFromPEM(key []byte) (*rsa.PublicKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	// Parse the key
+	var parsedKey interface{}
+	if parsedKey, err = x509.ParsePKIXPublicKey(block.Bytes); err != nil {
+		if cert, err := x509.ParseCertificate(block.Bytes); err == nil {
+			parsedKey = cert.PublicKey
+		} else {
+			return nil, err
+		}
+	}
+
+	var pkey *rsa.PublicKey
+	var ok bool
+	if pkey, ok = parsedKey.(*rsa.PublicKey); !ok {
+		return nil, ErrNotRSAPublicKey
+	}
+
+	return pkey, nil
+}

services/tiktak/vendor/github.com/dgrijalva/jwt-go/signing_method.go

@@ -0,0 +1,35 @@
+package jwt
+
+import (
+	"sync"
+)
+
+var signingMethods = map[string]func() SigningMethod{}
+var signingMethodLock = new(sync.RWMutex)
+
+// Implement SigningMethod to add new methods for signing or verifying tokens.
+type SigningMethod interface {
+	Verify(signingString, signature string, key interface{}) error // Returns nil if signature is valid
+	Sign(signingString string, key interface{}) (string, error)    // Returns encoded signature or error
+	Alg() string                                                   // returns the alg identifier for this method (example: 'HS256')
+}
+
+// Register the "alg" name and a factory function for signing method.
+// This is typically done during init() in the method's implementation
+func RegisterSigningMethod(alg string, f func() SigningMethod) {
+	signingMethodLock.Lock()
+	defer signingMethodLock.Unlock()
+
+	signingMethods[alg] = f
+}
+
+// Get a signing method from an "alg" string
+func GetSigningMethod(alg string) (method SigningMethod) {
+	signingMethodLock.RLock()
+	defer signingMethodLock.RUnlock()
+
+	if methodF, ok := signingMethods[alg]; ok {
+		method = methodF()
+	}
+	return
+}

services/tiktak/vendor/github.com/dgrijalva/jwt-go/token.go

@@ -0,0 +1,108 @@
+package jwt
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"strings"
+	"time"
+)
+
+// TimeFunc provides the current time when parsing token to validate "exp" claim (expiration time).
+// You can override it to use another time value.  This is useful for testing or if your
+// server uses a different time zone than your tokens.
+var TimeFunc = time.Now
+
+// Parse methods use this callback function to supply
+// the key for verification.  The function receives the parsed,
+// but unverified Token.  This allows you to use properties in the
+// Header of the token (such as `kid`) to identify which key to use.
+type Keyfunc func(*Token) (interface{}, error)
+
+// A JWT Token.  Different fields will be used depending on whether you're
+// creating or parsing/verifying a token.
+type Token struct {
+	Raw       string                 // The raw token.  Populated when you Parse a token
+	Method    SigningMethod          // The signing method used or to be used
+	Header    map[string]interface{} // The first segment of the token
+	Claims    Claims                 // The second segment of the token
+	Signature string                 // The third segment of the token.  Populated when you Parse a token
+	Valid     bool                   // Is the token valid?  Populated when you Parse/Verify a token
+}
+
+// Create a new Token.  Takes a signing method
+func New(method SigningMethod) *Token {
+	return NewWithClaims(method, MapClaims{})
+}
+
+func NewWithClaims(method SigningMethod, claims Claims) *Token {
+	return &Token{
+		Header: map[string]interface{}{
+			"typ": "JWT",
+			"alg": method.Alg(),
+		},
+		Claims: claims,
+		Method: method,
+	}
+}
+
+// Get the complete, signed token
+func (t *Token) SignedString(key interface{}) (string, error) {
+	var sig, sstr string
+	var err error
+	if sstr, err = t.SigningString(); err != nil {
+		return "", err
+	}
+	if sig, err = t.Method.Sign(sstr, key); err != nil {
+		return "", err
+	}
+	return strings.Join([]string{sstr, sig}, "."), nil
+}
+
+// Generate the signing string.  This is the
+// most expensive part of the whole deal.  Unless you
+// need this for something special, just go straight for
+// the SignedString.
+func (t *Token) SigningString() (string, error) {
+	var err error
+	parts := make([]string, 2)
+	for i, _ := range parts {
+		var jsonValue []byte
+		if i == 0 {
+			if jsonValue, err = json.Marshal(t.Header); err != nil {
+				return "", err
+			}
+		} else {
+			if jsonValue, err = json.Marshal(t.Claims); err != nil {
+				return "", err
+			}
+		}
+
+		parts[i] = EncodeSegment(jsonValue)
+	}
+	return strings.Join(parts, "."), nil
+}
+
+// Parse, validate, and return a token.
+// keyFunc will receive the parsed token and should return the key for validating.
+// If everything is kosher, err will be nil
+func Parse(tokenString string, keyFunc Keyfunc) (*Token, error) {
+	return new(Parser).Parse(tokenString, keyFunc)
+}
+
+func ParseWithClaims(tokenString string, claims Claims, keyFunc Keyfunc) (*Token, error) {
+	return new(Parser).ParseWithClaims(tokenString, claims, keyFunc)
+}
+
+// Encode JWT specific base64url encoding with padding stripped
+func EncodeSegment(seg []byte) string {
+	return strings.TrimRight(base64.URLEncoding.EncodeToString(seg), "=")
+}
+
+// Decode JWT specific base64url encoding with padding stripped
+func DecodeSegment(seg string) ([]byte, error) {
+	if l := len(seg) % 4; l > 0 {
+		seg += strings.Repeat("=", 4-l)
+	}
+
+	return base64.URLEncoding.DecodeString(seg)
+}

services/tiktak/vendor/github.com/disintegration/imaging/.travis.yml

@@ -0,0 +1,12 @@
+language: go
+go:
+  - "1.10.x"
+  - "1.11.x"
+  - "1.12.x"
+
+before_install:
+  - go get github.com/mattn/goveralls
+
+script:
+  - go test -v -race -cover
+  - $GOPATH/bin/goveralls -service=travis-ci

services/tiktak/vendor/github.com/disintegration/imaging/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2012 Grigory Dryapak
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

services/tiktak/vendor/github.com/disintegration/imaging/README.md

@@ -0,0 +1,226 @@
+# Imaging
+
+[![GoDoc](https://godoc.org/github.com/disintegration/imaging?status.svg)](https://godoc.org/github.com/disintegration/imaging)
+[![Build Status](https://travis-ci.org/disintegration/imaging.svg?branch=master)](https://travis-ci.org/disintegration/imaging)
+[![Coverage Status](https://coveralls.io/repos/github/disintegration/imaging/badge.svg?branch=master&service=github)](https://coveralls.io/github/disintegration/imaging?branch=master)
+[![Go Report Card](https://goreportcard.com/badge/github.com/disintegration/imaging)](https://goreportcard.com/report/github.com/disintegration/imaging)
+
+Package imaging provides basic image processing functions (resize, rotate, crop, brightness/contrast adjustments, etc.).
+
+All the image processing functions provided by the package accept any image type that implements `image.Image` interface
+as an input, and return a new image of `*image.NRGBA` type (32bit RGBA colors, non-premultiplied alpha).
+
+## Installation
+
+    go get -u github.com/disintegration/imaging
+
+## Documentation
+
+http://godoc.org/github.com/disintegration/imaging
+
+## Usage examples
+
+A few usage examples can be found below. See the documentation for the full list of supported functions.
+
+### Image resizing
+
+```go
+// Resize srcImage to size = 128x128px using the Lanczos filter.
+dstImage128 := imaging.Resize(srcImage, 128, 128, imaging.Lanczos)
+
+// Resize srcImage to width = 800px preserving the aspect ratio.
+dstImage800 := imaging.Resize(srcImage, 800, 0, imaging.Lanczos)
+
+// Scale down srcImage to fit the 800x600px bounding box.
+dstImageFit := imaging.Fit(srcImage, 800, 600, imaging.Lanczos)
+
+// Resize and crop the srcImage to fill the 100x100px area.
+dstImageFill := imaging.Fill(srcImage, 100, 100, imaging.Center, imaging.Lanczos)
+```
+
+Imaging supports image resizing using various resampling filters. The most notable ones:
+- `Lanczos` - A high-quality resampling filter for photographic images yielding sharp results.
+- `CatmullRom` - A sharp cubic filter that is faster than Lanczos filter while providing similar results.
+- `MitchellNetravali` - A cubic filter that produces smoother results with less ringing artifacts than CatmullRom.
+- `Linear` - Bilinear resampling filter, produces smooth output. Faster than cubic filters.
+- `Box` - Simple and fast averaging filter appropriate for downscaling. When upscaling it's similar to NearestNeighbor.
+- `NearestNeighbor` - Fastest resampling filter, no antialiasing.
+
+The full list of supported filters:  NearestNeighbor, Box, Linear, Hermite, MitchellNetravali, CatmullRom, BSpline, Gaussian, Lanczos, Hann, Hamming, Blackman, Bartlett, Welch, Cosine. Custom filters can be created using ResampleFilter struct.
+
+**Resampling filters comparison**
+
+Original image:
+
+![srcImage](testdata/branches.png)
+
+The same image resized from 600x400px to 150x100px using different resampling filters.
+From faster (lower quality) to slower (higher quality):
+
+Filter                    | Resize result
+--------------------------|---------------------------------------------
+`imaging.NearestNeighbor` | ![dstImage](testdata/out_resize_nearest.png)
+`imaging.Linear`          | ![dstImage](testdata/out_resize_linear.png)
+`imaging.CatmullRom`      | ![dstImage](testdata/out_resize_catrom.png)
+`imaging.Lanczos`         | ![dstImage](testdata/out_resize_lanczos.png)
+
+
+### Gaussian Blur
+
+```go
+dstImage := imaging.Blur(srcImage, 0.5)
+```
+
+Sigma parameter allows to control the strength of the blurring effect.
+
+Original image                     | Sigma = 0.5                            | Sigma = 1.5
+-----------------------------------|----------------------------------------|---------------------------------------
+![srcImage](testdata/flowers_small.png) | ![dstImage](testdata/out_blur_0.5.png) | ![dstImage](testdata/out_blur_1.5.png)
+
+### Sharpening
+
+```go
+dstImage := imaging.Sharpen(srcImage, 0.5)
+```
+
+`Sharpen` uses gaussian function internally. Sigma parameter allows to control the strength of the sharpening effect.
+
+Original image                     | Sigma = 0.5                               | Sigma = 1.5
+-----------------------------------|-------------------------------------------|------------------------------------------
+![srcImage](testdata/flowers_small.png) | ![dstImage](testdata/out_sharpen_0.5.png) | ![dstImage](testdata/out_sharpen_1.5.png)
+
+### Gamma correction
+
+```go
+dstImage := imaging.AdjustGamma(srcImage, 0.75)
+```
+
+Original image                     | Gamma = 0.75                             | Gamma = 1.25
+-----------------------------------|------------------------------------------|-----------------------------------------
+![srcImage](testdata/flowers_small.png) | ![dstImage](testdata/out_gamma_0.75.png) | ![dstImage](testdata/out_gamma_1.25.png)
+
+### Contrast adjustment
+
+```go
+dstImage := imaging.AdjustContrast(srcImage, 20)
+```
+
+Original image                     | Contrast = 15                              | Contrast = -15
+-----------------------------------|--------------------------------------------|-------------------------------------------
+![srcImage](testdata/flowers_small.png) | ![dstImage](testdata/out_contrast_p15.png) | ![dstImage](testdata/out_contrast_m15.png)
+
+### Brightness adjustment
+
+```go
+dstImage := imaging.AdjustBrightness(srcImage, 20)
+```
+
+Original image                     | Brightness = 10                              | Brightness = -10
+-----------------------------------|----------------------------------------------|---------------------------------------------
+![srcImage](testdata/flowers_small.png) | ![dstImage](testdata/out_brightness_p10.png) | ![dstImage](testdata/out_brightness_m10.png)
+
+### Saturation adjustment
+
+```go
+dstImage := imaging.AdjustSaturation(srcImage, 20)
+```
+
+Original image                     | Saturation = 30                              | Saturation = -30
+-----------------------------------|----------------------------------------------|---------------------------------------------
+![srcImage](testdata/flowers_small.png) | ![dstImage](testdata/out_saturation_p30.png) | ![dstImage](testdata/out_saturation_m30.png)
+
+## FAQ
+
+### Incorrect image orientation after processing (e.g. an image appears rotated after resizing)
+
+Most probably, the given image contains the EXIF orientation tag.
+The stadard `image/*` packages do not support loading and saving
+this kind of information. To fix the issue, try opening images with
+the `AutoOrientation` decode option. If this option is set to `true`,
+the image orientation is changed after decoding, according to the
+orientation tag (if present). Here's the example:
+
+```go
+img, err := imaging.Open("test.jpg", imaging.AutoOrientation(true))
+```
+
+### What's the difference between `imaging` and `gift` packages?
+
+[imaging](https://github.com/disintegration/imaging)
+is designed to be a lightweight and simple image manipulation package.
+It provides basic image processing functions and a few helper functions
+such as `Open` and `Save`. It consistently returns *image.NRGBA image 
+type (8 bits per channel, RGBA).
+
+[gift](https://github.com/disintegration/gift)
+supports more advanced image processing, for example, sRGB/Linear color
+space conversions. It also supports different output image types
+(e.g. 16 bits per channel) and provides easy-to-use API for chaining
+multiple processing steps together.
+
+## Example code
+
+```go
+package main
+
+import (
+	"image"
+	"image/color"
+	"log"
+
+	"github.com/disintegration/imaging"
+)
+
+func main() {
+	// Open a test image.
+	src, err := imaging.Open("testdata/flowers.png")
+	if err != nil {
+		log.Fatalf("failed to open image: %v", err)
+	}
+
+	// Crop the original image to 300x300px size using the center anchor.
+	src = imaging.CropAnchor(src, 300, 300, imaging.Center)
+
+	// Resize the cropped image to width = 200px preserving the aspect ratio.
+	src = imaging.Resize(src, 200, 0, imaging.Lanczos)
+
+	// Create a blurred version of the image.
+	img1 := imaging.Blur(src, 5)
+
+	// Create a grayscale version of the image with higher contrast and sharpness.
+	img2 := imaging.Grayscale(src)
+	img2 = imaging.AdjustContrast(img2, 20)
+	img2 = imaging.Sharpen(img2, 2)
+
+	// Create an inverted version of the image.
+	img3 := imaging.Invert(src)
+
+	// Create an embossed version of the image using a convolution filter.
+	img4 := imaging.Convolve3x3(
+		src,
+		[9]float64{
+			-1, -1, 0,
+			-1, 1, 1,
+			0, 1, 1,
+		},
+		nil,
+	)
+
+	// Create a new image and paste the four produced images into it.
+	dst := imaging.New(400, 400, color.NRGBA{0, 0, 0, 0})
+	dst = imaging.Paste(dst, img1, image.Pt(0, 0))
+	dst = imaging.Paste(dst, img2, image.Pt(0, 200))
+	dst = imaging.Paste(dst, img3, image.Pt(200, 0))
+	dst = imaging.Paste(dst, img4, image.Pt(200, 200))
+
+	// Save the resulting image as JPEG.
+	err = imaging.Save(dst, "testdata/out_example.jpg")
+	if err != nil {
+		log.Fatalf("failed to save image: %v", err)
+	}
+}
+```
+
+Output:
+
+![dstImage](testdata/out_example.jpg)

services/tiktak/vendor/github.com/disintegration/imaging/adjust.go

@@ -0,0 +1,253 @@
+package imaging
+
+import (
+	"image"
+	"image/color"
+	"math"
+)
+
+// Grayscale produces a grayscale version of the image.
+func Grayscale(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	parallel(0, src.h, func(ys <-chan int) {
+		for y := range ys {
+			i := y * dst.Stride
+			src.scan(0, y, src.w, y+1, dst.Pix[i:i+src.w*4])
+			for x := 0; x < src.w; x++ {
+				d := dst.Pix[i : i+3 : i+3]
+				r := d[0]
+				g := d[1]
+				b := d[2]
+				f := 0.299*float64(r) + 0.587*float64(g) + 0.114*float64(b)
+				y := uint8(f + 0.5)
+				d[0] = y
+				d[1] = y
+				d[2] = y
+				i += 4
+			}
+		}
+	})
+	return dst
+}
+
+// Invert produces an inverted (negated) version of the image.
+func Invert(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	parallel(0, src.h, func(ys <-chan int) {
+		for y := range ys {
+			i := y * dst.Stride
+			src.scan(0, y, src.w, y+1, dst.Pix[i:i+src.w*4])
+			for x := 0; x < src.w; x++ {
+				d := dst.Pix[i : i+3 : i+3]
+				d[0] = 255 - d[0]
+				d[1] = 255 - d[1]
+				d[2] = 255 - d[2]
+				i += 4
+			}
+		}
+	})
+	return dst
+}
+
+// AdjustSaturation changes the saturation of the image using the percentage parameter and returns the adjusted image.
+// The percentage must be in the range (-100, 100).
+// The percentage = 0 gives the original image.
+// The percentage = 100 gives the image with the saturation value doubled for each pixel.
+// The percentage = -100 gives the image with the saturation value zeroed for each pixel (grayscale).
+//
+// Examples:
+//  dstImage = imaging.AdjustSaturation(srcImage, 25) // Increase image saturation by 25%.
+//  dstImage = imaging.AdjustSaturation(srcImage, -10) // Decrease image saturation by 10%.
+//
+func AdjustSaturation(img image.Image, percentage float64) *image.NRGBA {
+	percentage = math.Min(math.Max(percentage, -100), 100)
+	multiplier := 1 + percentage/100
+
+	return AdjustFunc(img, func(c color.NRGBA) color.NRGBA {
+		h, s, l := rgbToHSL(c.R, c.G, c.B)
+		s *= multiplier
+		if s > 1 {
+			s = 1
+		}
+		r, g, b := hslToRGB(h, s, l)
+		return color.NRGBA{r, g, b, c.A}
+	})
+}
+
+// AdjustContrast changes the contrast of the image using the percentage parameter and returns the adjusted image.
+// The percentage must be in range (-100, 100). The percentage = 0 gives the original image.
+// The percentage = -100 gives solid gray image.
+//
+// Examples:
+//
+//	dstImage = imaging.AdjustContrast(srcImage, -10) // Decrease image contrast by 10%.
+//	dstImage = imaging.AdjustContrast(srcImage, 20) // Increase image contrast by 20%.
+//
+func AdjustContrast(img image.Image, percentage float64) *image.NRGBA {
+	percentage = math.Min(math.Max(percentage, -100.0), 100.0)
+	lut := make([]uint8, 256)
+
+	v := (100.0 + percentage) / 100.0
+	for i := 0; i < 256; i++ {
+		switch {
+		case 0 <= v && v <= 1:
+			lut[i] = clamp((0.5 + (float64(i)/255.0-0.5)*v) * 255.0)
+		case 1 < v && v < 2:
+			lut[i] = clamp((0.5 + (float64(i)/255.0-0.5)*(1/(2.0-v))) * 255.0)
+		default:
+			lut[i] = uint8(float64(i)/255.0+0.5) * 255
+		}
+	}
+
+	return adjustLUT(img, lut)
+}
+
+// AdjustBrightness changes the brightness of the image using the percentage parameter and returns the adjusted image.
+// The percentage must be in range (-100, 100). The percentage = 0 gives the original image.
+// The percentage = -100 gives solid black image. The percentage = 100 gives solid white image.
+//
+// Examples:
+//
+//	dstImage = imaging.AdjustBrightness(srcImage, -15) // Decrease image brightness by 15%.
+//	dstImage = imaging.AdjustBrightness(srcImage, 10) // Increase image brightness by 10%.
+//
+func AdjustBrightness(img image.Image, percentage float64) *image.NRGBA {
+	percentage = math.Min(math.Max(percentage, -100.0), 100.0)
+	lut := make([]uint8, 256)
+
+	shift := 255.0 * percentage / 100.0
+	for i := 0; i < 256; i++ {
+		lut[i] = clamp(float64(i) + shift)
+	}
+
+	return adjustLUT(img, lut)
+}
+
+// AdjustGamma performs a gamma correction on the image and returns the adjusted image.
+// Gamma parameter must be positive. Gamma = 1.0 gives the original image.
+// Gamma less than 1.0 darkens the image and gamma greater than 1.0 lightens it.
+//
+// Example:
+//
+//	dstImage = imaging.AdjustGamma(srcImage, 0.7)
+//
+func AdjustGamma(img image.Image, gamma float64) *image.NRGBA {
+	e := 1.0 / math.Max(gamma, 0.0001)
+	lut := make([]uint8, 256)
+
+	for i := 0; i < 256; i++ {
+		lut[i] = clamp(math.Pow(float64(i)/255.0, e) * 255.0)
+	}
+
+	return adjustLUT(img, lut)
+}
+
+// AdjustSigmoid changes the contrast of the image using a sigmoidal function and returns the adjusted image.
+// It's a non-linear contrast change useful for photo adjustments as it preserves highlight and shadow detail.
+// The midpoint parameter is the midpoint of contrast that must be between 0 and 1, typically 0.5.
+// The factor parameter indicates how much to increase or decrease the contrast, typically in range (-10, 10).
+// If the factor parameter is positive the image contrast is increased otherwise the contrast is decreased.
+//
+// Examples:
+//
+//	dstImage = imaging.AdjustSigmoid(srcImage, 0.5, 3.0) // Increase the contrast.
+//	dstImage = imaging.AdjustSigmoid(srcImage, 0.5, -3.0) // Decrease the contrast.
+//
+func AdjustSigmoid(img image.Image, midpoint, factor float64) *image.NRGBA {
+	if factor == 0 {
+		return Clone(img)
+	}
+
+	lut := make([]uint8, 256)
+	a := math.Min(math.Max(midpoint, 0.0), 1.0)
+	b := math.Abs(factor)
+	sig0 := sigmoid(a, b, 0)
+	sig1 := sigmoid(a, b, 1)
+	e := 1.0e-6
+
+	if factor > 0 {
+		for i := 0; i < 256; i++ {
+			x := float64(i) / 255.0
+			sigX := sigmoid(a, b, x)
+			f := (sigX - sig0) / (sig1 - sig0)
+			lut[i] = clamp(f * 255.0)
+		}
+	} else {
+		for i := 0; i < 256; i++ {
+			x := float64(i) / 255.0
+			arg := math.Min(math.Max((sig1-sig0)*x+sig0, e), 1.0-e)
+			f := a - math.Log(1.0/arg-1.0)/b
+			lut[i] = clamp(f * 255.0)
+		}
+	}
+
+	return adjustLUT(img, lut)
+}
+
+func sigmoid(a, b, x float64) float64 {
+	return 1 / (1 + math.Exp(b*(a-x)))
+}
+
+// adjustLUT applies the given lookup table to the colors of the image.
+func adjustLUT(img image.Image, lut []uint8) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	lut = lut[0:256]
+	parallel(0, src.h, func(ys <-chan int) {
+		for y := range ys {
+			i := y * dst.Stride
+			src.scan(0, y, src.w, y+1, dst.Pix[i:i+src.w*4])
+			for x := 0; x < src.w; x++ {
+				d := dst.Pix[i : i+3 : i+3]
+				d[0] = lut[d[0]]
+				d[1] = lut[d[1]]
+				d[2] = lut[d[2]]
+				i += 4
+			}
+		}
+	})
+	return dst
+}
+
+// AdjustFunc applies the fn function to each pixel of the img image and returns the adjusted image.
+//
+// Example:
+//
+//	dstImage = imaging.AdjustFunc(
+//		srcImage,
+//		func(c color.NRGBA) color.NRGBA {
+//			// Shift the red channel by 16.
+//			r := int(c.R) + 16
+//			if r > 255 {
+//				r = 255
+//			}
+//			return color.NRGBA{uint8(r), c.G, c.B, c.A}
+//		}
+//	)
+//
+func AdjustFunc(img image.Image, fn func(c color.NRGBA) color.NRGBA) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	parallel(0, src.h, func(ys <-chan int) {
+		for y := range ys {
+			i := y * dst.Stride
+			src.scan(0, y, src.w, y+1, dst.Pix[i:i+src.w*4])
+			for x := 0; x < src.w; x++ {
+				d := dst.Pix[i : i+4 : i+4]
+				r := d[0]
+				g := d[1]
+				b := d[2]
+				a := d[3]
+				c := fn(color.NRGBA{r, g, b, a})
+				d[0] = c.R
+				d[1] = c.G
+				d[2] = c.B
+				d[3] = c.A
+				i += 4
+			}
+		}
+	})
+	return dst
+}

services/tiktak/vendor/github.com/disintegration/imaging/convolution.go

@@ -0,0 +1,148 @@
+package imaging
+
+import (
+	"image"
+)
+
+// ConvolveOptions are convolution parameters.
+type ConvolveOptions struct {
+	// If Normalize is true the kernel is normalized before convolution.
+	Normalize bool
+
+	// If Abs is true the absolute value of each color channel is taken after convolution.
+	Abs bool
+
+	// Bias is added to each color channel value after convolution.
+	Bias int
+}
+
+// Convolve3x3 convolves the image with the specified 3x3 convolution kernel.
+// Default parameters are used if a nil *ConvolveOptions is passed.
+func Convolve3x3(img image.Image, kernel [9]float64, options *ConvolveOptions) *image.NRGBA {
+	return convolve(img, kernel[:], options)
+}
+
+// Convolve5x5 convolves the image with the specified 5x5 convolution kernel.
+// Default parameters are used if a nil *ConvolveOptions is passed.
+func Convolve5x5(img image.Image, kernel [25]float64, options *ConvolveOptions) *image.NRGBA {
+	return convolve(img, kernel[:], options)
+}
+
+func convolve(img image.Image, kernel []float64, options *ConvolveOptions) *image.NRGBA {
+	src := toNRGBA(img)
+	w := src.Bounds().Max.X
+	h := src.Bounds().Max.Y
+	dst := image.NewNRGBA(image.Rect(0, 0, w, h))
+
+	if w < 1 || h < 1 {
+		return dst
+	}
+
+	if options == nil {
+		options = &ConvolveOptions{}
+	}
+
+	if options.Normalize {
+		normalizeKernel(kernel)
+	}
+
+	type coef struct {
+		x, y int
+		k    float64
+	}
+	var coefs []coef
+	var m int
+
+	switch len(kernel) {
+	case 9:
+		m = 1
+	case 25:
+		m = 2
+	}
+
+	i := 0
+	for y := -m; y <= m; y++ {
+		for x := -m; x <= m; x++ {
+			if kernel[i] != 0 {
+				coefs = append(coefs, coef{x: x, y: y, k: kernel[i]})
+			}
+			i++
+		}
+	}
+
+	parallel(0, h, func(ys <-chan int) {
+		for y := range ys {
+			for x := 0; x < w; x++ {
+				var r, g, b float64
+				for _, c := range coefs {
+					ix := x + c.x
+					if ix < 0 {
+						ix = 0
+					} else if ix >= w {
+						ix = w - 1
+					}
+
+					iy := y + c.y
+					if iy < 0 {
+						iy = 0
+					} else if iy >= h {
+						iy = h - 1
+					}
+
+					off := iy*src.Stride + ix*4
+					s := src.Pix[off : off+3 : off+3]
+					r += float64(s[0]) * c.k
+					g += float64(s[1]) * c.k
+					b += float64(s[2]) * c.k
+				}
+
+				if options.Abs {
+					if r < 0 {
+						r = -r
+					}
+					if g < 0 {
+						g = -g
+					}
+					if b < 0 {
+						b = -b
+					}
+				}
+
+				if options.Bias != 0 {
+					r += float64(options.Bias)
+					g += float64(options.Bias)
+					b += float64(options.Bias)
+				}
+
+				srcOff := y*src.Stride + x*4
+				dstOff := y*dst.Stride + x*4
+				d := dst.Pix[dstOff : dstOff+4 : dstOff+4]
+				d[0] = clamp(r)
+				d[1] = clamp(g)
+				d[2] = clamp(b)
+				d[3] = src.Pix[srcOff+3]
+			}
+		}
+	})
+
+	return dst
+}
+
+func normalizeKernel(kernel []float64) {
+	var sum, sumpos float64
+	for i := range kernel {
+		sum += kernel[i]
+		if kernel[i] > 0 {
+			sumpos += kernel[i]
+		}
+	}
+	if sum != 0 {
+		for i := range kernel {
+			kernel[i] /= sum
+		}
+	} else if sumpos != 0 {
+		for i := range kernel {
+			kernel[i] /= sumpos
+		}
+	}
+}

services/tiktak/vendor/github.com/disintegration/imaging/doc.go

@@ -0,0 +1,7 @@
+/*
+Package imaging provides basic image processing functions (resize, rotate, crop, brightness/contrast adjustments, etc.).
+
+All the image processing functions provided by the package accept any image type that implements image.Image interface
+as an input, and return a new image of *image.NRGBA type (32bit RGBA colors, non-premultiplied alpha).
+*/
+package imaging

services/tiktak/vendor/github.com/disintegration/imaging/effects.go

@@ -0,0 +1,169 @@
+package imaging
+
+import (
+	"image"
+	"math"
+)
+
+func gaussianBlurKernel(x, sigma float64) float64 {
+	return math.Exp(-(x*x)/(2*sigma*sigma)) / (sigma * math.Sqrt(2*math.Pi))
+}
+
+// Blur produces a blurred version of the image using a Gaussian function.
+// Sigma parameter must be positive and indicates how much the image will be blurred.
+//
+// Example:
+//
+//	dstImage := imaging.Blur(srcImage, 3.5)
+//
+func Blur(img image.Image, sigma float64) *image.NRGBA {
+	if sigma <= 0 {
+		return Clone(img)
+	}
+
+	radius := int(math.Ceil(sigma * 3.0))
+	kernel := make([]float64, radius+1)
+
+	for i := 0; i <= radius; i++ {
+		kernel[i] = gaussianBlurKernel(float64(i), sigma)
+	}
+
+	return blurVertical(blurHorizontal(img, kernel), kernel)
+}
+
+func blurHorizontal(img image.Image, kernel []float64) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	radius := len(kernel) - 1
+
+	parallel(0, src.h, func(ys <-chan int) {
+		scanLine := make([]uint8, src.w*4)
+		scanLineF := make([]float64, len(scanLine))
+		for y := range ys {
+			src.scan(0, y, src.w, y+1, scanLine)
+			for i, v := range scanLine {
+				scanLineF[i] = float64(v)
+			}
+			for x := 0; x < src.w; x++ {
+				min := x - radius
+				if min < 0 {
+					min = 0
+				}
+				max := x + radius
+				if max > src.w-1 {
+					max = src.w - 1
+				}
+				var r, g, b, a, wsum float64
+				for ix := min; ix <= max; ix++ {
+					i := ix * 4
+					weight := kernel[absint(x-ix)]
+					wsum += weight
+					s := scanLineF[i : i+4 : i+4]
+					wa := s[3] * weight
+					r += s[0] * wa
+					g += s[1] * wa
+					b += s[2] * wa
+					a += wa
+				}
+				if a != 0 {
+					aInv := 1 / a
+					j := y*dst.Stride + x*4
+					d := dst.Pix[j : j+4 : j+4]
+					d[0] = clamp(r * aInv)
+					d[1] = clamp(g * aInv)
+					d[2] = clamp(b * aInv)
+					d[3] = clamp(a / wsum)
+				}
+			}
+		}
+	})
+
+	return dst
+}
+
+func blurVertical(img image.Image, kernel []float64) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	radius := len(kernel) - 1
+
+	parallel(0, src.w, func(xs <-chan int) {
+		scanLine := make([]uint8, src.h*4)
+		scanLineF := make([]float64, len(scanLine))
+		for x := range xs {
+			src.scan(x, 0, x+1, src.h, scanLine)
+			for i, v := range scanLine {
+				scanLineF[i] = float64(v)
+			}
+			for y := 0; y < src.h; y++ {
+				min := y - radius
+				if min < 0 {
+					min = 0
+				}
+				max := y + radius
+				if max > src.h-1 {
+					max = src.h - 1
+				}
+				var r, g, b, a, wsum float64
+				for iy := min; iy <= max; iy++ {
+					i := iy * 4
+					weight := kernel[absint(y-iy)]
+					wsum += weight
+					s := scanLineF[i : i+4 : i+4]
+					wa := s[3] * weight
+					r += s[0] * wa
+					g += s[1] * wa
+					b += s[2] * wa
+					a += wa
+				}
+				if a != 0 {
+					aInv := 1 / a
+					j := y*dst.Stride + x*4
+					d := dst.Pix[j : j+4 : j+4]
+					d[0] = clamp(r * aInv)
+					d[1] = clamp(g * aInv)
+					d[2] = clamp(b * aInv)
+					d[3] = clamp(a / wsum)
+				}
+			}
+		}
+	})
+
+	return dst
+}
+
+// Sharpen produces a sharpened version of the image.
+// Sigma parameter must be positive and indicates how much the image will be sharpened.
+//
+// Example:
+//
+//	dstImage := imaging.Sharpen(srcImage, 3.5)
+//
+func Sharpen(img image.Image, sigma float64) *image.NRGBA {
+	if sigma <= 0 {
+		return Clone(img)
+	}
+
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	blurred := Blur(img, sigma)
+
+	parallel(0, src.h, func(ys <-chan int) {
+		scanLine := make([]uint8, src.w*4)
+		for y := range ys {
+			src.scan(0, y, src.w, y+1, scanLine)
+			j := y * dst.Stride
+			for i := 0; i < src.w*4; i++ {
+				val := int(scanLine[i])<<1 - int(blurred.Pix[j])
+				if val < 0 {
+					val = 0
+				} else if val > 0xff {
+					val = 0xff
+				}
+				dst.Pix[j] = uint8(val)
+				j++
+			}
+		}
+	})
+
+	return dst
+}

services/tiktak/vendor/github.com/disintegration/imaging/go.mod

@@ -0,0 +1,3 @@
+module github.com/disintegration/imaging
+
+require golang.org/x/image v0.0.0-20191009234506-e7c1f5e7dbb8

services/tiktak/vendor/github.com/disintegration/imaging/go.sum

@@ -0,0 +1,3 @@
+golang.org/x/image v0.0.0-20191009234506-e7c1f5e7dbb8 h1:hVwzHzIUGRjiF7EcUjqNxk3NCfkPxbDKRdnNE1Rpg0U=
+golang.org/x/image v0.0.0-20191009234506-e7c1f5e7dbb8/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=

services/tiktak/vendor/github.com/disintegration/imaging/histogram.go

@@ -0,0 +1,52 @@
+package imaging
+
+import (
+	"image"
+	"sync"
+)
+
+// Histogram returns a normalized histogram of an image.
+//
+// Resulting histogram is represented as an array of 256 floats, where
+// histogram[i] is a probability of a pixel being of a particular luminance i.
+func Histogram(img image.Image) [256]float64 {
+	var mu sync.Mutex
+	var histogram [256]float64
+	var total float64
+
+	src := newScanner(img)
+	if src.w == 0 || src.h == 0 {
+		return histogram
+	}
+
+	parallel(0, src.h, func(ys <-chan int) {
+		var tmpHistogram [256]float64
+		var tmpTotal float64
+		scanLine := make([]uint8, src.w*4)
+		for y := range ys {
+			src.scan(0, y, src.w, y+1, scanLine)
+			i := 0
+			for x := 0; x < src.w; x++ {
+				s := scanLine[i : i+3 : i+3]
+				r := s[0]
+				g := s[1]
+				b := s[2]
+				y := 0.299*float32(r) + 0.587*float32(g) + 0.114*float32(b)
+				tmpHistogram[int(y+0.5)]++
+				tmpTotal++
+				i += 4
+			}
+		}
+		mu.Lock()
+		for i := 0; i < 256; i++ {
+			histogram[i] += tmpHistogram[i]
+		}
+		total += tmpTotal
+		mu.Unlock()
+	})
+
+	for i := 0; i < 256; i++ {
+		histogram[i] = histogram[i] / total
+	}
+	return histogram
+}

services/tiktak/vendor/github.com/disintegration/imaging/io.go

@@ -0,0 +1,444 @@
+package imaging
+
+import (
+	"encoding/binary"
+	"errors"
+	"image"
+	"image/draw"
+	"image/gif"
+	"image/jpeg"
+	"image/png"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"golang.org/x/image/bmp"
+	"golang.org/x/image/tiff"
+)
+
+type fileSystem interface {
+	Create(string) (io.WriteCloser, error)
+	Open(string) (io.ReadCloser, error)
+}
+
+type localFS struct{}
+
+func (localFS) Create(name string) (io.WriteCloser, error) { return os.Create(name) }
+func (localFS) Open(name string) (io.ReadCloser, error)    { return os.Open(name) }
+
+var fs fileSystem = localFS{}
+
+type decodeConfig struct {
+	autoOrientation bool
+}
+
+var defaultDecodeConfig = decodeConfig{
+	autoOrientation: false,
+}
+
+// DecodeOption sets an optional parameter for the Decode and Open functions.
+type DecodeOption func(*decodeConfig)
+
+// AutoOrientation returns a DecodeOption that sets the auto-orientation mode.
+// If auto-orientation is enabled, the image will be transformed after decoding
+// according to the EXIF orientation tag (if present). By default it's disabled.
+func AutoOrientation(enabled bool) DecodeOption {
+	return func(c *decodeConfig) {
+		c.autoOrientation = enabled
+	}
+}
+
+// Decode reads an image from r.
+func Decode(r io.Reader, opts ...DecodeOption) (image.Image, error) {
+	cfg := defaultDecodeConfig
+	for _, option := range opts {
+		option(&cfg)
+	}
+
+	if !cfg.autoOrientation {
+		img, _, err := image.Decode(r)
+		return img, err
+	}
+
+	var orient orientation
+	pr, pw := io.Pipe()
+	r = io.TeeReader(r, pw)
+	done := make(chan struct{})
+	go func() {
+		defer close(done)
+		orient = readOrientation(pr)
+		io.Copy(ioutil.Discard, pr)
+	}()
+
+	img, _, err := image.Decode(r)
+	pw.Close()
+	<-done
+	if err != nil {
+		return nil, err
+	}
+
+	return fixOrientation(img, orient), nil
+}
+
+// Open loads an image from file.
+//
+// Examples:
+//
+//	// Load an image from file.
+//	img, err := imaging.Open("test.jpg")
+//
+//	// Load an image and transform it depending on the EXIF orientation tag (if present).
+//	img, err := imaging.Open("test.jpg", imaging.AutoOrientation(true))
+//
+func Open(filename string, opts ...DecodeOption) (image.Image, error) {
+	file, err := fs.Open(filename)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+	return Decode(file, opts...)
+}
+
+// Format is an image file format.
+type Format int
+
+// Image file formats.
+const (
+	JPEG Format = iota
+	PNG
+	GIF
+	TIFF
+	BMP
+)
+
+var formatExts = map[string]Format{
+	"jpg":  JPEG,
+	"jpeg": JPEG,
+	"png":  PNG,
+	"gif":  GIF,
+	"tif":  TIFF,
+	"tiff": TIFF,
+	"bmp":  BMP,
+}
+
+var formatNames = map[Format]string{
+	JPEG: "JPEG",
+	PNG:  "PNG",
+	GIF:  "GIF",
+	TIFF: "TIFF",
+	BMP:  "BMP",
+}
+
+func (f Format) String() string {
+	return formatNames[f]
+}
+
+// ErrUnsupportedFormat means the given image format is not supported.
+var ErrUnsupportedFormat = errors.New("imaging: unsupported image format")
+
+// FormatFromExtension parses image format from filename extension:
+// "jpg" (or "jpeg"), "png", "gif", "tif" (or "tiff") and "bmp" are supported.
+func FormatFromExtension(ext string) (Format, error) {
+	if f, ok := formatExts[strings.ToLower(strings.TrimPrefix(ext, "."))]; ok {
+		return f, nil
+	}
+	return -1, ErrUnsupportedFormat
+}
+
+// FormatFromFilename parses image format from filename:
+// "jpg" (or "jpeg"), "png", "gif", "tif" (or "tiff") and "bmp" are supported.
+func FormatFromFilename(filename string) (Format, error) {
+	ext := filepath.Ext(filename)
+	return FormatFromExtension(ext)
+}
+
+type encodeConfig struct {
+	jpegQuality         int
+	gifNumColors        int
+	gifQuantizer        draw.Quantizer
+	gifDrawer           draw.Drawer
+	pngCompressionLevel png.CompressionLevel
+}
+
+var defaultEncodeConfig = encodeConfig{
+	jpegQuality:         95,
+	gifNumColors:        256,
+	gifQuantizer:        nil,
+	gifDrawer:           nil,
+	pngCompressionLevel: png.DefaultCompression,
+}
+
+// EncodeOption sets an optional parameter for the Encode and Save functions.
+type EncodeOption func(*encodeConfig)
+
+// JPEGQuality returns an EncodeOption that sets the output JPEG quality.
+// Quality ranges from 1 to 100 inclusive, higher is better. Default is 95.
+func JPEGQuality(quality int) EncodeOption {
+	return func(c *encodeConfig) {
+		c.jpegQuality = quality
+	}
+}
+
+// GIFNumColors returns an EncodeOption that sets the maximum number of colors
+// used in the GIF-encoded image. It ranges from 1 to 256.  Default is 256.
+func GIFNumColors(numColors int) EncodeOption {
+	return func(c *encodeConfig) {
+		c.gifNumColors = numColors
+	}
+}
+
+// GIFQuantizer returns an EncodeOption that sets the quantizer that is used to produce
+// a palette of the GIF-encoded image.
+func GIFQuantizer(quantizer draw.Quantizer) EncodeOption {
+	return func(c *encodeConfig) {
+		c.gifQuantizer = quantizer
+	}
+}
+
+// GIFDrawer returns an EncodeOption that sets the drawer that is used to convert
+// the source image to the desired palette of the GIF-encoded image.
+func GIFDrawer(drawer draw.Drawer) EncodeOption {
+	return func(c *encodeConfig) {
+		c.gifDrawer = drawer
+	}
+}
+
+// PNGCompressionLevel returns an EncodeOption that sets the compression level
+// of the PNG-encoded image. Default is png.DefaultCompression.
+func PNGCompressionLevel(level png.CompressionLevel) EncodeOption {
+	return func(c *encodeConfig) {
+		c.pngCompressionLevel = level
+	}
+}
+
+// Encode writes the image img to w in the specified format (JPEG, PNG, GIF, TIFF or BMP).
+func Encode(w io.Writer, img image.Image, format Format, opts ...EncodeOption) error {
+	cfg := defaultEncodeConfig
+	for _, option := range opts {
+		option(&cfg)
+	}
+
+	switch format {
+	case JPEG:
+		if nrgba, ok := img.(*image.NRGBA); ok && nrgba.Opaque() {
+			rgba := &image.RGBA{
+				Pix:    nrgba.Pix,
+				Stride: nrgba.Stride,
+				Rect:   nrgba.Rect,
+			}
+			return jpeg.Encode(w, rgba, &jpeg.Options{Quality: cfg.jpegQuality})
+		}
+		return jpeg.Encode(w, img, &jpeg.Options{Quality: cfg.jpegQuality})
+
+	case PNG:
+		encoder := png.Encoder{CompressionLevel: cfg.pngCompressionLevel}
+		return encoder.Encode(w, img)
+
+	case GIF:
+		return gif.Encode(w, img, &gif.Options{
+			NumColors: cfg.gifNumColors,
+			Quantizer: cfg.gifQuantizer,
+			Drawer:    cfg.gifDrawer,
+		})
+
+	case TIFF:
+		return tiff.Encode(w, img, &tiff.Options{Compression: tiff.Deflate, Predictor: true})
+
+	case BMP:
+		return bmp.Encode(w, img)
+	}
+
+	return ErrUnsupportedFormat
+}
+
+// Save saves the image to file with the specified filename.
+// The format is determined from the filename extension:
+// "jpg" (or "jpeg"), "png", "gif", "tif" (or "tiff") and "bmp" are supported.
+//
+// Examples:
+//
+//	// Save the image as PNG.
+//	err := imaging.Save(img, "out.png")
+//
+//	// Save the image as JPEG with optional quality parameter set to 80.
+//	err := imaging.Save(img, "out.jpg", imaging.JPEGQuality(80))
+//
+func Save(img image.Image, filename string, opts ...EncodeOption) (err error) {
+	f, err := FormatFromFilename(filename)
+	if err != nil {
+		return err
+	}
+	file, err := fs.Create(filename)
+	if err != nil {
+		return err
+	}
+	err = Encode(file, img, f, opts...)
+	errc := file.Close()
+	if err == nil {
+		err = errc
+	}
+	return err
+}
+
+// orientation is an EXIF flag that specifies the transformation
+// that should be applied to image to display it correctly.
+type orientation int
+
+const (
+	orientationUnspecified = 0
+	orientationNormal      = 1
+	orientationFlipH       = 2
+	orientationRotate180   = 3
+	orientationFlipV       = 4
+	orientationTranspose   = 5
+	orientationRotate270   = 6
+	orientationTransverse  = 7
+	orientationRotate90    = 8
+)
+
+// readOrientation tries to read the orientation EXIF flag from image data in r.
+// If the EXIF data block is not found or the orientation flag is not found
+// or any other error occures while reading the data, it returns the
+// orientationUnspecified (0) value.
+func readOrientation(r io.Reader) orientation {
+	const (
+		markerSOI      = 0xffd8
+		markerAPP1     = 0xffe1
+		exifHeader     = 0x45786966
+		byteOrderBE    = 0x4d4d
+		byteOrderLE    = 0x4949
+		orientationTag = 0x0112
+	)
+
+	// Check if JPEG SOI marker is present.
+	var soi uint16
+	if err := binary.Read(r, binary.BigEndian, &soi); err != nil {
+		return orientationUnspecified
+	}
+	if soi != markerSOI {
+		return orientationUnspecified // Missing JPEG SOI marker.
+	}
+
+	// Find JPEG APP1 marker.
+	for {
+		var marker, size uint16
+		if err := binary.Read(r, binary.BigEndian, &marker); err != nil {
+			return orientationUnspecified
+		}
+		if err := binary.Read(r, binary.BigEndian, &size); err != nil {
+			return orientationUnspecified
+		}
+		if marker>>8 != 0xff {
+			return orientationUnspecified // Invalid JPEG marker.
+		}
+		if marker == markerAPP1 {
+			break
+		}
+		if size < 2 {
+			return orientationUnspecified // Invalid block size.
+		}
+		if _, err := io.CopyN(ioutil.Discard, r, int64(size-2)); err != nil {
+			return orientationUnspecified
+		}
+	}
+
+	// Check if EXIF header is present.
+	var header uint32
+	if err := binary.Read(r, binary.BigEndian, &header); err != nil {
+		return orientationUnspecified
+	}
+	if header != exifHeader {
+		return orientationUnspecified
+	}
+	if _, err := io.CopyN(ioutil.Discard, r, 2); err != nil {
+		return orientationUnspecified
+	}
+
+	// Read byte order information.
+	var (
+		byteOrderTag uint16
+		byteOrder    binary.ByteOrder
+	)
+	if err := binary.Read(r, binary.BigEndian, &byteOrderTag); err != nil {
+		return orientationUnspecified
+	}
+	switch byteOrderTag {
+	case byteOrderBE:
+		byteOrder = binary.BigEndian
+	case byteOrderLE:
+		byteOrder = binary.LittleEndian
+	default:
+		return orientationUnspecified // Invalid byte order flag.
+	}
+	if _, err := io.CopyN(ioutil.Discard, r, 2); err != nil {
+		return orientationUnspecified
+	}
+
+	// Skip the EXIF offset.
+	var offset uint32
+	if err := binary.Read(r, byteOrder, &offset); err != nil {
+		return orientationUnspecified
+	}
+	if offset < 8 {
+		return orientationUnspecified // Invalid offset value.
+	}
+	if _, err := io.CopyN(ioutil.Discard, r, int64(offset-8)); err != nil {
+		return orientationUnspecified
+	}
+
+	// Read the number of tags.
+	var numTags uint16
+	if err := binary.Read(r, byteOrder, &numTags); err != nil {
+		return orientationUnspecified
+	}
+
+	// Find the orientation tag.
+	for i := 0; i < int(numTags); i++ {
+		var tag uint16
+		if err := binary.Read(r, byteOrder, &tag); err != nil {
+			return orientationUnspecified
+		}
+		if tag != orientationTag {
+			if _, err := io.CopyN(ioutil.Discard, r, 10); err != nil {
+				return orientationUnspecified
+			}
+			continue
+		}
+		if _, err := io.CopyN(ioutil.Discard, r, 6); err != nil {
+			return orientationUnspecified
+		}
+		var val uint16
+		if err := binary.Read(r, byteOrder, &val); err != nil {
+			return orientationUnspecified
+		}
+		if val < 1 || val > 8 {
+			return orientationUnspecified // Invalid tag value.
+		}
+		return orientation(val)
+	}
+	return orientationUnspecified // Missing orientation tag.
+}
+
+// fixOrientation applies a transform to img corresponding to the given orientation flag.
+func fixOrientation(img image.Image, o orientation) image.Image {
+	switch o {
+	case orientationNormal:
+	case orientationFlipH:
+		img = FlipH(img)
+	case orientationFlipV:
+		img = FlipV(img)
+	case orientationRotate90:
+		img = Rotate90(img)
+	case orientationRotate180:
+		img = Rotate180(img)
+	case orientationRotate270:
+		img = Rotate270(img)
+	case orientationTranspose:
+		img = Transpose(img)
+	case orientationTransverse:
+		img = Transverse(img)
+	}
+	return img
+}

services/tiktak/vendor/github.com/disintegration/imaging/resize.go

@@ -0,0 +1,595 @@
+package imaging
+
+import (
+	"image"
+	"math"
+)
+
+type indexWeight struct {
+	index  int
+	weight float64
+}
+
+func precomputeWeights(dstSize, srcSize int, filter ResampleFilter) [][]indexWeight {
+	du := float64(srcSize) / float64(dstSize)
+	scale := du
+	if scale < 1.0 {
+		scale = 1.0
+	}
+	ru := math.Ceil(scale * filter.Support)
+
+	out := make([][]indexWeight, dstSize)
+	tmp := make([]indexWeight, 0, dstSize*int(ru+2)*2)
+
+	for v := 0; v < dstSize; v++ {
+		fu := (float64(v)+0.5)*du - 0.5
+
+		begin := int(math.Ceil(fu - ru))
+		if begin < 0 {
+			begin = 0
+		}
+		end := int(math.Floor(fu + ru))
+		if end > srcSize-1 {
+			end = srcSize - 1
+		}
+
+		var sum float64
+		for u := begin; u <= end; u++ {
+			w := filter.Kernel((float64(u) - fu) / scale)
+			if w != 0 {
+				sum += w
+				tmp = append(tmp, indexWeight{index: u, weight: w})
+			}
+		}
+		if sum != 0 {
+			for i := range tmp {
+				tmp[i].weight /= sum
+			}
+		}
+
+		out[v] = tmp
+		tmp = tmp[len(tmp):]
+	}
+
+	return out
+}
+
+// Resize resizes the image to the specified width and height using the specified resampling
+// filter and returns the transformed image. If one of width or height is 0, the image aspect
+// ratio is preserved.
+//
+// Example:
+//
+//	dstImage := imaging.Resize(srcImage, 800, 600, imaging.Lanczos)
+//
+func Resize(img image.Image, width, height int, filter ResampleFilter) *image.NRGBA {
+	dstW, dstH := width, height
+	if dstW < 0 || dstH < 0 {
+		return &image.NRGBA{}
+	}
+	if dstW == 0 && dstH == 0 {
+		return &image.NRGBA{}
+	}
+
+	srcW := img.Bounds().Dx()
+	srcH := img.Bounds().Dy()
+	if srcW <= 0 || srcH <= 0 {
+		return &image.NRGBA{}
+	}
+
+	// If new width or height is 0 then preserve aspect ratio, minimum 1px.
+	if dstW == 0 {
+		tmpW := float64(dstH) * float64(srcW) / float64(srcH)
+		dstW = int(math.Max(1.0, math.Floor(tmpW+0.5)))
+	}
+	if dstH == 0 {
+		tmpH := float64(dstW) * float64(srcH) / float64(srcW)
+		dstH = int(math.Max(1.0, math.Floor(tmpH+0.5)))
+	}
+
+	if filter.Support <= 0 {
+		// Nearest-neighbor special case.
+		return resizeNearest(img, dstW, dstH)
+	}
+
+	if srcW != dstW && srcH != dstH {
+		return resizeVertical(resizeHorizontal(img, dstW, filter), dstH, filter)
+	}
+	if srcW != dstW {
+		return resizeHorizontal(img, dstW, filter)
+	}
+	if srcH != dstH {
+		return resizeVertical(img, dstH, filter)
+	}
+	return Clone(img)
+}
+
+func resizeHorizontal(img image.Image, width int, filter ResampleFilter) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, width, src.h))
+	weights := precomputeWeights(width, src.w, filter)
+	parallel(0, src.h, func(ys <-chan int) {
+		scanLine := make([]uint8, src.w*4)
+		for y := range ys {
+			src.scan(0, y, src.w, y+1, scanLine)
+			j0 := y * dst.Stride
+			for x := range weights {
+				var r, g, b, a float64
+				for _, w := range weights[x] {
+					i := w.index * 4
+					s := scanLine[i : i+4 : i+4]
+					aw := float64(s[3]) * w.weight
+					r += float64(s[0]) * aw
+					g += float64(s[1]) * aw
+					b += float64(s[2]) * aw
+					a += aw
+				}
+				if a != 0 {
+					aInv := 1 / a
+					j := j0 + x*4
+					d := dst.Pix[j : j+4 : j+4]
+					d[0] = clamp(r * aInv)
+					d[1] = clamp(g * aInv)
+					d[2] = clamp(b * aInv)
+					d[3] = clamp(a)
+				}
+			}
+		}
+	})
+	return dst
+}
+
+func resizeVertical(img image.Image, height int, filter ResampleFilter) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, height))
+	weights := precomputeWeights(height, src.h, filter)
+	parallel(0, src.w, func(xs <-chan int) {
+		scanLine := make([]uint8, src.h*4)
+		for x := range xs {
+			src.scan(x, 0, x+1, src.h, scanLine)
+			for y := range weights {
+				var r, g, b, a float64
+				for _, w := range weights[y] {
+					i := w.index * 4
+					s := scanLine[i : i+4 : i+4]
+					aw := float64(s[3]) * w.weight
+					r += float64(s[0]) * aw
+					g += float64(s[1]) * aw
+					b += float64(s[2]) * aw
+					a += aw
+				}
+				if a != 0 {
+					aInv := 1 / a
+					j := y*dst.Stride + x*4
+					d := dst.Pix[j : j+4 : j+4]
+					d[0] = clamp(r * aInv)
+					d[1] = clamp(g * aInv)
+					d[2] = clamp(b * aInv)
+					d[3] = clamp(a)
+				}
+			}
+		}
+	})
+	return dst
+}
+
+// resizeNearest is a fast nearest-neighbor resize, no filtering.
+func resizeNearest(img image.Image, width, height int) *image.NRGBA {
+	dst := image.NewNRGBA(image.Rect(0, 0, width, height))
+	dx := float64(img.Bounds().Dx()) / float64(width)
+	dy := float64(img.Bounds().Dy()) / float64(height)
+
+	if dx > 1 && dy > 1 {
+		src := newScanner(img)
+		parallel(0, height, func(ys <-chan int) {
+			for y := range ys {
+				srcY := int((float64(y) + 0.5) * dy)
+				dstOff := y * dst.Stride
+				for x := 0; x < width; x++ {
+					srcX := int((float64(x) + 0.5) * dx)
+					src.scan(srcX, srcY, srcX+1, srcY+1, dst.Pix[dstOff:dstOff+4])
+					dstOff += 4
+				}
+			}
+		})
+	} else {
+		src := toNRGBA(img)
+		parallel(0, height, func(ys <-chan int) {
+			for y := range ys {
+				srcY := int((float64(y) + 0.5) * dy)
+				srcOff0 := srcY * src.Stride
+				dstOff := y * dst.Stride
+				for x := 0; x < width; x++ {
+					srcX := int((float64(x) + 0.5) * dx)
+					srcOff := srcOff0 + srcX*4
+					copy(dst.Pix[dstOff:dstOff+4], src.Pix[srcOff:srcOff+4])
+					dstOff += 4
+				}
+			}
+		})
+	}
+
+	return dst
+}
+
+// Fit scales down the image using the specified resample filter to fit the specified
+// maximum width and height and returns the transformed image.
+//
+// Example:
+//
+//	dstImage := imaging.Fit(srcImage, 800, 600, imaging.Lanczos)
+//
+func Fit(img image.Image, width, height int, filter ResampleFilter) *image.NRGBA {
+	maxW, maxH := width, height
+
+	if maxW <= 0 || maxH <= 0 {
+		return &image.NRGBA{}
+	}
+
+	srcBounds := img.Bounds()
+	srcW := srcBounds.Dx()
+	srcH := srcBounds.Dy()
+
+	if srcW <= 0 || srcH <= 0 {
+		return &image.NRGBA{}
+	}
+
+	if srcW <= maxW && srcH <= maxH {
+		return Clone(img)
+	}
+
+	srcAspectRatio := float64(srcW) / float64(srcH)
+	maxAspectRatio := float64(maxW) / float64(maxH)
+
+	var newW, newH int
+	if srcAspectRatio > maxAspectRatio {
+		newW = maxW
+		newH = int(float64(newW) / srcAspectRatio)
+	} else {
+		newH = maxH
+		newW = int(float64(newH) * srcAspectRatio)
+	}
+
+	return Resize(img, newW, newH, filter)
+}
+
+// Fill creates an image with the specified dimensions and fills it with the scaled source image.
+// To achieve the correct aspect ratio without stretching, the source image will be cropped.
+//
+// Example:
+//
+//	dstImage := imaging.Fill(srcImage, 800, 600, imaging.Center, imaging.Lanczos)
+//
+func Fill(img image.Image, width, height int, anchor Anchor, filter ResampleFilter) *image.NRGBA {
+	dstW, dstH := width, height
+
+	if dstW <= 0 || dstH <= 0 {
+		return &image.NRGBA{}
+	}
+
+	srcBounds := img.Bounds()
+	srcW := srcBounds.Dx()
+	srcH := srcBounds.Dy()
+
+	if srcW <= 0 || srcH <= 0 {
+		return &image.NRGBA{}
+	}
+
+	if srcW == dstW && srcH == dstH {
+		return Clone(img)
+	}
+
+	if srcW >= 100 && srcH >= 100 {
+		return cropAndResize(img, dstW, dstH, anchor, filter)
+	}
+	return resizeAndCrop(img, dstW, dstH, anchor, filter)
+}
+
+// cropAndResize crops the image to the smallest possible size that has the required aspect ratio using
+// the given anchor point, then scales it to the specified dimensions and returns the transformed image.
+//
+// This is generally faster than resizing first, but may result in inaccuracies when used on small source images.
+func cropAndResize(img image.Image, width, height int, anchor Anchor, filter ResampleFilter) *image.NRGBA {
+	dstW, dstH := width, height
+
+	srcBounds := img.Bounds()
+	srcW := srcBounds.Dx()
+	srcH := srcBounds.Dy()
+	srcAspectRatio := float64(srcW) / float64(srcH)
+	dstAspectRatio := float64(dstW) / float64(dstH)
+
+	var tmp *image.NRGBA
+	if srcAspectRatio < dstAspectRatio {
+		cropH := float64(srcW) * float64(dstH) / float64(dstW)
+		tmp = CropAnchor(img, srcW, int(math.Max(1, cropH)+0.5), anchor)
+	} else {
+		cropW := float64(srcH) * float64(dstW) / float64(dstH)
+		tmp = CropAnchor(img, int(math.Max(1, cropW)+0.5), srcH, anchor)
+	}
+
+	return Resize(tmp, dstW, dstH, filter)
+}
+
+// resizeAndCrop resizes the image to the smallest possible size that will cover the specified dimensions,
+// crops the resized image to the specified dimensions using the given anchor point and returns
+// the transformed image.
+func resizeAndCrop(img image.Image, width, height int, anchor Anchor, filter ResampleFilter) *image.NRGBA {
+	dstW, dstH := width, height
+
+	srcBounds := img.Bounds()
+	srcW := srcBounds.Dx()
+	srcH := srcBounds.Dy()
+	srcAspectRatio := float64(srcW) / float64(srcH)
+	dstAspectRatio := float64(dstW) / float64(dstH)
+
+	var tmp *image.NRGBA
+	if srcAspectRatio < dstAspectRatio {
+		tmp = Resize(img, dstW, 0, filter)
+	} else {
+		tmp = Resize(img, 0, dstH, filter)
+	}
+
+	return CropAnchor(tmp, dstW, dstH, anchor)
+}
+
+// Thumbnail scales the image up or down using the specified resample filter, crops it
+// to the specified width and hight and returns the transformed image.
+//
+// Example:
+//
+//	dstImage := imaging.Thumbnail(srcImage, 100, 100, imaging.Lanczos)
+//
+func Thumbnail(img image.Image, width, height int, filter ResampleFilter) *image.NRGBA {
+	return Fill(img, width, height, Center, filter)
+}
+
+// ResampleFilter specifies a resampling filter to be used for image resizing.
+//
+//	General filter recommendations:
+//
+//	- Lanczos
+//		A high-quality resampling filter for photographic images yielding sharp results.
+//
+//	- CatmullRom
+//		A sharp cubic filter that is faster than Lanczos filter while providing similar results.
+//
+//	- MitchellNetravali
+//		A cubic filter that produces smoother results with less ringing artifacts than CatmullRom.
+//
+//	- Linear
+//		Bilinear resampling filter, produces a smooth output. Faster than cubic filters.
+//
+//	- Box
+//		Simple and fast averaging filter appropriate for downscaling.
+//		When upscaling it's similar to NearestNeighbor.
+//
+//	- NearestNeighbor
+//		Fastest resampling filter, no antialiasing.
+//
+type ResampleFilter struct {
+	Support float64
+	Kernel  func(float64) float64
+}
+
+// NearestNeighbor is a nearest-neighbor filter (no anti-aliasing).
+var NearestNeighbor ResampleFilter
+
+// Box filter (averaging pixels).
+var Box ResampleFilter
+
+// Linear filter.
+var Linear ResampleFilter
+
+// Hermite cubic spline filter (BC-spline; B=0; C=0).
+var Hermite ResampleFilter
+
+// MitchellNetravali is Mitchell-Netravali cubic filter (BC-spline; B=1/3; C=1/3).
+var MitchellNetravali ResampleFilter
+
+// CatmullRom is a Catmull-Rom - sharp cubic filter (BC-spline; B=0; C=0.5).
+var CatmullRom ResampleFilter
+
+// BSpline is a smooth cubic filter (BC-spline; B=1; C=0).
+var BSpline ResampleFilter
+
+// Gaussian is a Gaussian blurring filter.
+var Gaussian ResampleFilter
+
+// Bartlett is a Bartlett-windowed sinc filter (3 lobes).
+var Bartlett ResampleFilter
+
+// Lanczos filter (3 lobes).
+var Lanczos ResampleFilter
+
+// Hann is a Hann-windowed sinc filter (3 lobes).
+var Hann ResampleFilter
+
+// Hamming is a Hamming-windowed sinc filter (3 lobes).
+var Hamming ResampleFilter
+
+// Blackman is a Blackman-windowed sinc filter (3 lobes).
+var Blackman ResampleFilter
+
+// Welch is a Welch-windowed sinc filter (parabolic window, 3 lobes).
+var Welch ResampleFilter
+
+// Cosine is a Cosine-windowed sinc filter (3 lobes).
+var Cosine ResampleFilter
+
+func bcspline(x, b, c float64) float64 {
+	var y float64
+	x = math.Abs(x)
+	if x < 1.0 {
+		y = ((12-9*b-6*c)*x*x*x + (-18+12*b+6*c)*x*x + (6 - 2*b)) / 6
+	} else if x < 2.0 {
+		y = ((-b-6*c)*x*x*x + (6*b+30*c)*x*x + (-12*b-48*c)*x + (8*b + 24*c)) / 6
+	}
+	return y
+}
+
+func sinc(x float64) float64 {
+	if x == 0 {
+		return 1
+	}
+	return math.Sin(math.Pi*x) / (math.Pi * x)
+}
+
+func init() {
+	NearestNeighbor = ResampleFilter{
+		Support: 0.0, // special case - not applying the filter
+	}
+
+	Box = ResampleFilter{
+		Support: 0.5,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x <= 0.5 {
+				return 1.0
+			}
+			return 0
+		},
+	}
+
+	Linear = ResampleFilter{
+		Support: 1.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 1.0 {
+				return 1.0 - x
+			}
+			return 0
+		},
+	}
+
+	Hermite = ResampleFilter{
+		Support: 1.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 1.0 {
+				return bcspline(x, 0.0, 0.0)
+			}
+			return 0
+		},
+	}
+
+	MitchellNetravali = ResampleFilter{
+		Support: 2.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 2.0 {
+				return bcspline(x, 1.0/3.0, 1.0/3.0)
+			}
+			return 0
+		},
+	}
+
+	CatmullRom = ResampleFilter{
+		Support: 2.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 2.0 {
+				return bcspline(x, 0.0, 0.5)
+			}
+			return 0
+		},
+	}
+
+	BSpline = ResampleFilter{
+		Support: 2.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 2.0 {
+				return bcspline(x, 1.0, 0.0)
+			}
+			return 0
+		},
+	}
+
+	Gaussian = ResampleFilter{
+		Support: 2.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 2.0 {
+				return math.Exp(-2 * x * x)
+			}
+			return 0
+		},
+	}
+
+	Bartlett = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * (3.0 - x) / 3.0
+			}
+			return 0
+		},
+	}
+
+	Lanczos = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * sinc(x/3.0)
+			}
+			return 0
+		},
+	}
+
+	Hann = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * (0.5 + 0.5*math.Cos(math.Pi*x/3.0))
+			}
+			return 0
+		},
+	}
+
+	Hamming = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * (0.54 + 0.46*math.Cos(math.Pi*x/3.0))
+			}
+			return 0
+		},
+	}
+
+	Blackman = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * (0.42 - 0.5*math.Cos(math.Pi*x/3.0+math.Pi) + 0.08*math.Cos(2.0*math.Pi*x/3.0))
+			}
+			return 0
+		},
+	}
+
+	Welch = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * (1.0 - (x * x / 9.0))
+			}
+			return 0
+		},
+	}
+
+	Cosine = ResampleFilter{
+		Support: 3.0,
+		Kernel: func(x float64) float64 {
+			x = math.Abs(x)
+			if x < 3.0 {
+				return sinc(x) * math.Cos((math.Pi/2.0)*(x/3.0))
+			}
+			return 0
+		},
+	}
+}

services/tiktak/vendor/github.com/disintegration/imaging/scanner.go

@@ -0,0 +1,285 @@
+package imaging
+
+import (
+	"image"
+	"image/color"
+)
+
+type scanner struct {
+	image   image.Image
+	w, h    int
+	palette []color.NRGBA
+}
+
+func newScanner(img image.Image) *scanner {
+	s := &scanner{
+		image: img,
+		w:     img.Bounds().Dx(),
+		h:     img.Bounds().Dy(),
+	}
+	if img, ok := img.(*image.Paletted); ok {
+		s.palette = make([]color.NRGBA, len(img.Palette))
+		for i := 0; i < len(img.Palette); i++ {
+			s.palette[i] = color.NRGBAModel.Convert(img.Palette[i]).(color.NRGBA)
+		}
+	}
+	return s
+}
+
+// scan scans the given rectangular region of the image into dst.
+func (s *scanner) scan(x1, y1, x2, y2 int, dst []uint8) {
+	switch img := s.image.(type) {
+	case *image.NRGBA:
+		size := (x2 - x1) * 4
+		j := 0
+		i := y1*img.Stride + x1*4
+		if size == 4 {
+			for y := y1; y < y2; y++ {
+				d := dst[j : j+4 : j+4]
+				s := img.Pix[i : i+4 : i+4]
+				d[0] = s[0]
+				d[1] = s[1]
+				d[2] = s[2]
+				d[3] = s[3]
+				j += size
+				i += img.Stride
+			}
+		} else {
+			for y := y1; y < y2; y++ {
+				copy(dst[j:j+size], img.Pix[i:i+size])
+				j += size
+				i += img.Stride
+			}
+		}
+
+	case *image.NRGBA64:
+		j := 0
+		for y := y1; y < y2; y++ {
+			i := y*img.Stride + x1*8
+			for x := x1; x < x2; x++ {
+				s := img.Pix[i : i+8 : i+8]
+				d := dst[j : j+4 : j+4]
+				d[0] = s[0]
+				d[1] = s[2]
+				d[2] = s[4]
+				d[3] = s[6]
+				j += 4
+				i += 8
+			}
+		}
+
+	case *image.RGBA:
+		j := 0
+		for y := y1; y < y2; y++ {
+			i := y*img.Stride + x1*4
+			for x := x1; x < x2; x++ {
+				d := dst[j : j+4 : j+4]
+				a := img.Pix[i+3]
+				switch a {
+				case 0:
+					d[0] = 0
+					d[1] = 0
+					d[2] = 0
+					d[3] = a
+				case 0xff:
+					s := img.Pix[i : i+4 : i+4]
+					d[0] = s[0]
+					d[1] = s[1]
+					d[2] = s[2]
+					d[3] = a
+				default:
+					s := img.Pix[i : i+4 : i+4]
+					r16 := uint16(s[0])
+					g16 := uint16(s[1])
+					b16 := uint16(s[2])
+					a16 := uint16(a)
+					d[0] = uint8(r16 * 0xff / a16)
+					d[1] = uint8(g16 * 0xff / a16)
+					d[2] = uint8(b16 * 0xff / a16)
+					d[3] = a
+				}
+				j += 4
+				i += 4
+			}
+		}
+
+	case *image.RGBA64:
+		j := 0
+		for y := y1; y < y2; y++ {
+			i := y*img.Stride + x1*8
+			for x := x1; x < x2; x++ {
+				s := img.Pix[i : i+8 : i+8]
+				d := dst[j : j+4 : j+4]
+				a := s[6]
+				switch a {
+				case 0:
+					d[0] = 0
+					d[1] = 0
+					d[2] = 0
+				case 0xff:
+					d[0] = s[0]
+					d[1] = s[2]
+					d[2] = s[4]
+				default:
+					r32 := uint32(s[0])<<8 | uint32(s[1])
+					g32 := uint32(s[2])<<8 | uint32(s[3])
+					b32 := uint32(s[4])<<8 | uint32(s[5])
+					a32 := uint32(s[6])<<8 | uint32(s[7])
+					d[0] = uint8((r32 * 0xffff / a32) >> 8)
+					d[1] = uint8((g32 * 0xffff / a32) >> 8)
+					d[2] = uint8((b32 * 0xffff / a32) >> 8)
+				}
+				d[3] = a
+				j += 4
+				i += 8
+			}
+		}
+
+	case *image.Gray:
+		j := 0
+		for y := y1; y < y2; y++ {
+			i := y*img.Stride + x1
+			for x := x1; x < x2; x++ {
+				c := img.Pix[i]
+				d := dst[j : j+4 : j+4]
+				d[0] = c
+				d[1] = c
+				d[2] = c
+				d[3] = 0xff
+				j += 4
+				i++
+			}
+		}
+
+	case *image.Gray16:
+		j := 0
+		for y := y1; y < y2; y++ {
+			i := y*img.Stride + x1*2
+			for x := x1; x < x2; x++ {
+				c := img.Pix[i]
+				d := dst[j : j+4 : j+4]
+				d[0] = c
+				d[1] = c
+				d[2] = c
+				d[3] = 0xff
+				j += 4
+				i += 2
+			}
+		}
+
+	case *image.YCbCr:
+		j := 0
+		x1 += img.Rect.Min.X
+		x2 += img.Rect.Min.X
+		y1 += img.Rect.Min.Y
+		y2 += img.Rect.Min.Y
+
+		hy := img.Rect.Min.Y / 2
+		hx := img.Rect.Min.X / 2
+		for y := y1; y < y2; y++ {
+			iy := (y-img.Rect.Min.Y)*img.YStride + (x1 - img.Rect.Min.X)
+
+			var yBase int
+			switch img.SubsampleRatio {
+			case image.YCbCrSubsampleRatio444, image.YCbCrSubsampleRatio422:
+				yBase = (y - img.Rect.Min.Y) * img.CStride
+			case image.YCbCrSubsampleRatio420, image.YCbCrSubsampleRatio440:
+				yBase = (y/2 - hy) * img.CStride
+			}
+
+			for x := x1; x < x2; x++ {
+				var ic int
+				switch img.SubsampleRatio {
+				case image.YCbCrSubsampleRatio444, image.YCbCrSubsampleRatio440:
+					ic = yBase + (x - img.Rect.Min.X)
+				case image.YCbCrSubsampleRatio422, image.YCbCrSubsampleRatio420:
+					ic = yBase + (x/2 - hx)
+				default:
+					ic = img.COffset(x, y)
+				}
+
+				yy1 := int32(img.Y[iy]) * 0x10101
+				cb1 := int32(img.Cb[ic]) - 128
+				cr1 := int32(img.Cr[ic]) - 128
+
+				r := yy1 + 91881*cr1
+				if uint32(r)&0xff000000 == 0 {
+					r >>= 16
+				} else {
+					r = ^(r >> 31)
+				}
+
+				g := yy1 - 22554*cb1 - 46802*cr1
+				if uint32(g)&0xff000000 == 0 {
+					g >>= 16
+				} else {
+					g = ^(g >> 31)
+				}
+
+				b := yy1 + 116130*cb1
+				if uint32(b)&0xff000000 == 0 {
+					b >>= 16
+				} else {
+					b = ^(b >> 31)
+				}
+
+				d := dst[j : j+4 : j+4]
+				d[0] = uint8(r)
+				d[1] = uint8(g)
+				d[2] = uint8(b)
+				d[3] = 0xff
+
+				iy++
+				j += 4
+			}
+		}
+
+	case *image.Paletted:
+		j := 0
+		for y := y1; y < y2; y++ {
+			i := y*img.Stride + x1
+			for x := x1; x < x2; x++ {
+				c := s.palette[img.Pix[i]]
+				d := dst[j : j+4 : j+4]
+				d[0] = c.R
+				d[1] = c.G
+				d[2] = c.B
+				d[3] = c.A
+				j += 4
+				i++
+			}
+		}
+
+	default:
+		j := 0
+		b := s.image.Bounds()
+		x1 += b.Min.X
+		x2 += b.Min.X
+		y1 += b.Min.Y
+		y2 += b.Min.Y
+		for y := y1; y < y2; y++ {
+			for x := x1; x < x2; x++ {
+				r16, g16, b16, a16 := s.image.At(x, y).RGBA()
+				d := dst[j : j+4 : j+4]
+				switch a16 {
+				case 0xffff:
+					d[0] = uint8(r16 >> 8)
+					d[1] = uint8(g16 >> 8)
+					d[2] = uint8(b16 >> 8)
+					d[3] = 0xff
+				case 0:
+					d[0] = 0
+					d[1] = 0
+					d[2] = 0
+					d[3] = 0
+				default:
+					d[0] = uint8(((r16 * 0xffff) / a16) >> 8)
+					d[1] = uint8(((g16 * 0xffff) / a16) >> 8)
+					d[2] = uint8(((b16 * 0xffff) / a16) >> 8)
+					d[3] = uint8(a16 >> 8)
+				}
+				j += 4
+			}
+		}
+	}
+}

services/tiktak/vendor/github.com/disintegration/imaging/tools.go

@@ -0,0 +1,249 @@
+package imaging
+
+import (
+	"bytes"
+	"image"
+	"image/color"
+	"math"
+)
+
+// New creates a new image with the specified width and height, and fills it with the specified color.
+func New(width, height int, fillColor color.Color) *image.NRGBA {
+	if width <= 0 || height <= 0 {
+		return &image.NRGBA{}
+	}
+
+	c := color.NRGBAModel.Convert(fillColor).(color.NRGBA)
+	if (c == color.NRGBA{0, 0, 0, 0}) {
+		return image.NewNRGBA(image.Rect(0, 0, width, height))
+	}
+
+	return &image.NRGBA{
+		Pix:    bytes.Repeat([]byte{c.R, c.G, c.B, c.A}, width*height),
+		Stride: 4 * width,
+		Rect:   image.Rect(0, 0, width, height),
+	}
+}
+
+// Clone returns a copy of the given image.
+func Clone(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
+	size := src.w * 4
+	parallel(0, src.h, func(ys <-chan int) {
+		for y := range ys {
+			i := y * dst.Stride
+			src.scan(0, y, src.w, y+1, dst.Pix[i:i+size])
+		}
+	})
+	return dst
+}
+
+// Anchor is the anchor point for image alignment.
+type Anchor int
+
+// Anchor point positions.
+const (
+	Center Anchor = iota
+	TopLeft
+	Top
+	TopRight
+	Left
+	Right
+	BottomLeft
+	Bottom
+	BottomRight
+)
+
+func anchorPt(b image.Rectangle, w, h int, anchor Anchor) image.Point {
+	var x, y int
+	switch anchor {
+	case TopLeft:
+		x = b.Min.X
+		y = b.Min.Y
+	case Top:
+		x = b.Min.X + (b.Dx()-w)/2
+		y = b.Min.Y
+	case TopRight:
+		x = b.Max.X - w
+		y = b.Min.Y
+	case Left:
+		x = b.Min.X
+		y = b.Min.Y + (b.Dy()-h)/2
+	case Right:
+		x = b.Max.X - w
+		y = b.Min.Y + (b.Dy()-h)/2
+	case BottomLeft:
+		x = b.Min.X
+		y = b.Max.Y - h
+	case Bottom:
+		x = b.Min.X + (b.Dx()-w)/2
+		y = b.Max.Y - h
+	case BottomRight:
+		x = b.Max.X - w
+		y = b.Max.Y - h
+	default:
+		x = b.Min.X + (b.Dx()-w)/2
+		y = b.Min.Y + (b.Dy()-h)/2
+	}
+	return image.Pt(x, y)
+}
+
+// Crop cuts out a rectangular region with the specified bounds
+// from the image and returns the cropped image.
+func Crop(img image.Image, rect image.Rectangle) *image.NRGBA {
+	r := rect.Intersect(img.Bounds()).Sub(img.Bounds().Min)
+	if r.Empty() {
+		return &image.NRGBA{}
+	}
+	src := newScanner(img)
+	dst := image.NewNRGBA(image.Rect(0, 0, r.Dx(), r.Dy()))
+	rowSize := r.Dx() * 4
+	parallel(r.Min.Y, r.Max.Y, func(ys <-chan int) {
+		for y := range ys {
+			i := (y - r.Min.Y) * dst.Stride
+			src.scan(r.Min.X, y, r.Max.X, y+1, dst.Pix[i:i+rowSize])
+		}
+	})
+	return dst
+}
+
+// CropAnchor cuts out a rectangular region with the specified size
+// from the image using the specified anchor point and returns the cropped image.
+func CropAnchor(img image.Image, width, height int, anchor Anchor) *image.NRGBA {
+	srcBounds := img.Bounds()
+	pt := anchorPt(srcBounds, width, height, anchor)
+	r := image.Rect(0, 0, width, height).Add(pt)
+	b := srcBounds.Intersect(r)
+	return Crop(img, b)
+}
+
+// CropCenter cuts out a rectangular region with the specified size
+// from the center of the image and returns the cropped image.
+func CropCenter(img image.Image, width, height int) *image.NRGBA {
+	return CropAnchor(img, width, height, Center)
+}
+
+// Paste pastes the img image to the background image at the specified position and returns the combined image.
+func Paste(background, img image.Image, pos image.Point) *image.NRGBA {
+	dst := Clone(background)
+	pos = pos.Sub(background.Bounds().Min)
+	pasteRect := image.Rectangle{Min: pos, Max: pos.Add(img.Bounds().Size())}
+	interRect := pasteRect.Intersect(dst.Bounds())
+	if interRect.Empty() {
+		return dst
+	}
+	src := newScanner(img)
+	parallel(interRect.Min.Y, interRect.Max.Y, func(ys <-chan int) {
+		for y := range ys {
+			x1 := interRect.Min.X - pasteRect.Min.X
+			x2 := interRect.Max.X - pasteRect.Min.X
+			y1 := y - pasteRect.Min.Y
+			y2 := y1 + 1
+			i1 := y*dst.Stride + interRect.Min.X*4
+			i2 := i1 + interRect.Dx()*4
+			src.scan(x1, y1, x2, y2, dst.Pix[i1:i2])
+		}
+	})
+	return dst
+}
+
+// PasteCenter pastes the img image to the center of the background image and returns the combined image.
+func PasteCenter(background, img image.Image) *image.NRGBA {
+	bgBounds := background.Bounds()
+	bgW := bgBounds.Dx()
+	bgH := bgBounds.Dy()
+	bgMinX := bgBounds.Min.X
+	bgMinY := bgBounds.Min.Y
+
+	centerX := bgMinX + bgW/2
+	centerY := bgMinY + bgH/2
+
+	x0 := centerX - img.Bounds().Dx()/2
+	y0 := centerY - img.Bounds().Dy()/2
+
+	return Paste(background, img, image.Pt(x0, y0))
+}
+
+// Overlay draws the img image over the background image at given position
+// and returns the combined image. Opacity parameter is the opacity of the img
+// image layer, used to compose the images, it must be from 0.0 to 1.0.
+//
+// Examples:
+//
+//	// Draw spriteImage over backgroundImage at the given position (x=50, y=50).
+//	dstImage := imaging.Overlay(backgroundImage, spriteImage, image.Pt(50, 50), 1.0)
+//
+//	// Blend two opaque images of the same size.
+//	dstImage := imaging.Overlay(imageOne, imageTwo, image.Pt(0, 0), 0.5)
+//
+func Overlay(background, img image.Image, pos image.Point, opacity float64) *image.NRGBA {
+	opacity = math.Min(math.Max(opacity, 0.0), 1.0) // Ensure 0.0 <= opacity <= 1.0.
+	dst := Clone(background)
+	pos = pos.Sub(background.Bounds().Min)
+	pasteRect := image.Rectangle{Min: pos, Max: pos.Add(img.Bounds().Size())}
+	interRect := pasteRect.Intersect(dst.Bounds())
+	if interRect.Empty() {
+		return dst
+	}
+	src := newScanner(img)
+	parallel(interRect.Min.Y, interRect.Max.Y, func(ys <-chan int) {
+		scanLine := make([]uint8, interRect.Dx()*4)
+		for y := range ys {
+			x1 := interRect.Min.X - pasteRect.Min.X
+			x2 := interRect.Max.X - pasteRect.Min.X
+			y1 := y - pasteRect.Min.Y
+			y2 := y1 + 1
+			src.scan(x1, y1, x2, y2, scanLine)
+			i := y*dst.Stride + interRect.Min.X*4
+			j := 0
+			for x := interRect.Min.X; x < interRect.Max.X; x++ {
+				d := dst.Pix[i : i+4 : i+4]
+				r1 := float64(d[0])
+				g1 := float64(d[1])
+				b1 := float64(d[2])
+				a1 := float64(d[3])
+
+				s := scanLine[j : j+4 : j+4]
+				r2 := float64(s[0])
+				g2 := float64(s[1])
+				b2 := float64(s[2])
+				a2 := float64(s[3])
+
+				coef2 := opacity * a2 / 255
+				coef1 := (1 - coef2) * a1 / 255
+				coefSum := coef1 + coef2
+				coef1 /= coefSum
+				coef2 /= coefSum
+
+				d[0] = uint8(r1*coef1 + r2*coef2)
+				d[1] = uint8(g1*coef1 + g2*coef2)
+				d[2] = uint8(b1*coef1 + b2*coef2)
+				d[3] = uint8(math.Min(a1+a2*opacity*(255-a1)/255, 255))
+
+				i += 4
+				j += 4
+			}
+		}
+	})
+	return dst
+}
+
+// OverlayCenter overlays the img image to the center of the background image and
+// returns the combined image. Opacity parameter is the opacity of the img
+// image layer, used to compose the images, it must be from 0.0 to 1.0.
+func OverlayCenter(background, img image.Image, opacity float64) *image.NRGBA {
+	bgBounds := background.Bounds()
+	bgW := bgBounds.Dx()
+	bgH := bgBounds.Dy()
+	bgMinX := bgBounds.Min.X
+	bgMinY := bgBounds.Min.Y
+
+	centerX := bgMinX + bgW/2
+	centerY := bgMinY + bgH/2
+
+	x0 := centerX - img.Bounds().Dx()/2
+	y0 := centerY - img.Bounds().Dy()/2
+
+	return Overlay(background, img, image.Point{x0, y0}, opacity)
+}

services/tiktak/vendor/github.com/disintegration/imaging/transform.go

@@ -0,0 +1,268 @@
+package imaging
+
+import (
+	"image"
+	"image/color"
+	"math"
+)
+
+// FlipH flips the image horizontally (from left to right) and returns the transformed image.
+func FlipH(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dstW := src.w
+	dstH := src.h
+	rowSize := dstW * 4
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			i := dstY * dst.Stride
+			srcY := dstY
+			src.scan(0, srcY, src.w, srcY+1, dst.Pix[i:i+rowSize])
+			reverse(dst.Pix[i : i+rowSize])
+		}
+	})
+	return dst
+}
+
+// FlipV flips the image vertically (from top to bottom) and returns the transformed image.
+func FlipV(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dstW := src.w
+	dstH := src.h
+	rowSize := dstW * 4
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			i := dstY * dst.Stride
+			srcY := dstH - dstY - 1
+			src.scan(0, srcY, src.w, srcY+1, dst.Pix[i:i+rowSize])
+		}
+	})
+	return dst
+}
+
+// Transpose flips the image horizontally and rotates 90 degrees counter-clockwise.
+func Transpose(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dstW := src.h
+	dstH := src.w
+	rowSize := dstW * 4
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			i := dstY * dst.Stride
+			srcX := dstY
+			src.scan(srcX, 0, srcX+1, src.h, dst.Pix[i:i+rowSize])
+		}
+	})
+	return dst
+}
+
+// Transverse flips the image vertically and rotates 90 degrees counter-clockwise.
+func Transverse(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dstW := src.h
+	dstH := src.w
+	rowSize := dstW * 4
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			i := dstY * dst.Stride
+			srcX := dstH - dstY - 1
+			src.scan(srcX, 0, srcX+1, src.h, dst.Pix[i:i+rowSize])
+			reverse(dst.Pix[i : i+rowSize])
+		}
+	})
+	return dst
+}
+
+// Rotate90 rotates the image 90 degrees counter-clockwise and returns the transformed image.
+func Rotate90(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dstW := src.h
+	dstH := src.w
+	rowSize := dstW * 4
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			i := dstY * dst.Stride
+			srcX := dstH - dstY - 1
+			src.scan(srcX, 0, srcX+1, src.h, dst.Pix[i:i+rowSize])
+		}
+	})
+	return dst
+}
+
+// Rotate180 rotates the image 180 degrees counter-clockwise and returns the transformed image.
+func Rotate180(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dstW := src.w
+	dstH := src.h
+	rowSize := dstW * 4
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			i := dstY * dst.Stride
+			srcY := dstH - dstY - 1
+			src.scan(0, srcY, src.w, srcY+1, dst.Pix[i:i+rowSize])
+			reverse(dst.Pix[i : i+rowSize])
+		}
+	})
+	return dst
+}
+
+// Rotate270 rotates the image 270 degrees counter-clockwise and returns the transformed image.
+func Rotate270(img image.Image) *image.NRGBA {
+	src := newScanner(img)
+	dstW := src.h
+	dstH := src.w
+	rowSize := dstW * 4
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			i := dstY * dst.Stride
+			srcX := dstY
+			src.scan(srcX, 0, srcX+1, src.h, dst.Pix[i:i+rowSize])
+			reverse(dst.Pix[i : i+rowSize])
+		}
+	})
+	return dst
+}
+
+// Rotate rotates an image by the given angle counter-clockwise .
+// The angle parameter is the rotation angle in degrees.
+// The bgColor parameter specifies the color of the uncovered zone after the rotation.
+func Rotate(img image.Image, angle float64, bgColor color.Color) *image.NRGBA {
+	angle = angle - math.Floor(angle/360)*360
+
+	switch angle {
+	case 0:
+		return Clone(img)
+	case 90:
+		return Rotate90(img)
+	case 180:
+		return Rotate180(img)
+	case 270:
+		return Rotate270(img)
+	}
+
+	src := toNRGBA(img)
+	srcW := src.Bounds().Max.X
+	srcH := src.Bounds().Max.Y
+	dstW, dstH := rotatedSize(srcW, srcH, angle)
+	dst := image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
+
+	if dstW <= 0 || dstH <= 0 {
+		return dst
+	}
+
+	srcXOff := float64(srcW)/2 - 0.5
+	srcYOff := float64(srcH)/2 - 0.5
+	dstXOff := float64(dstW)/2 - 0.5
+	dstYOff := float64(dstH)/2 - 0.5
+
+	bgColorNRGBA := color.NRGBAModel.Convert(bgColor).(color.NRGBA)
+	sin, cos := math.Sincos(math.Pi * angle / 180)
+
+	parallel(0, dstH, func(ys <-chan int) {
+		for dstY := range ys {
+			for dstX := 0; dstX < dstW; dstX++ {
+				xf, yf := rotatePoint(float64(dstX)-dstXOff, float64(dstY)-dstYOff, sin, cos)
+				xf, yf = xf+srcXOff, yf+srcYOff
+				interpolatePoint(dst, dstX, dstY, src, xf, yf, bgColorNRGBA)
+			}
+		}
+	})
+
+	return dst
+}
+
+func rotatePoint(x, y, sin, cos float64) (float64, float64) {
+	return x*cos - y*sin, x*sin + y*cos
+}
+
+func rotatedSize(w, h int, angle float64) (int, int) {
+	if w <= 0 || h <= 0 {
+		return 0, 0
+	}
+
+	sin, cos := math.Sincos(math.Pi * angle / 180)
+	x1, y1 := rotatePoint(float64(w-1), 0, sin, cos)
+	x2, y2 := rotatePoint(float64(w-1), float64(h-1), sin, cos)
+	x3, y3 := rotatePoint(0, float64(h-1), sin, cos)
+
+	minx := math.Min(x1, math.Min(x2, math.Min(x3, 0)))
+	maxx := math.Max(x1, math.Max(x2, math.Max(x3, 0)))
+	miny := math.Min(y1, math.Min(y2, math.Min(y3, 0)))
+	maxy := math.Max(y1, math.Max(y2, math.Max(y3, 0)))
+
+	neww := maxx - minx + 1
+	if neww-math.Floor(neww) > 0.1 {
+		neww++
+	}
+	newh := maxy - miny + 1
+	if newh-math.Floor(newh) > 0.1 {
+		newh++
+	}
+
+	return int(neww), int(newh)
+}
+
+func interpolatePoint(dst *image.NRGBA, dstX, dstY int, src *image.NRGBA, xf, yf float64, bgColor color.NRGBA) {
+	j := dstY*dst.Stride + dstX*4
+	d := dst.Pix[j : j+4 : j+4]
+
+	x0 := int(math.Floor(xf))
+	y0 := int(math.Floor(yf))
+	bounds := src.Bounds()
+	if !image.Pt(x0, y0).In(image.Rect(bounds.Min.X-1, bounds.Min.Y-1, bounds.Max.X, bounds.Max.Y)) {
+		d[0] = bgColor.R
+		d[1] = bgColor.G
+		d[2] = bgColor.B
+		d[3] = bgColor.A
+		return
+	}
+
+	xq := xf - float64(x0)
+	yq := yf - float64(y0)
+	points := [4]image.Point{
+		{x0, y0},
+		{x0 + 1, y0},
+		{x0, y0 + 1},
+		{x0 + 1, y0 + 1},
+	}
+	weights := [4]float64{
+		(1 - xq) * (1 - yq),
+		xq * (1 - yq),
+		(1 - xq) * yq,
+		xq * yq,
+	}
+
+	var r, g, b, a float64
+	for i := 0; i < 4; i++ {
+		p := points[i]
+		w := weights[i]
+		if p.In(bounds) {
+			i := p.Y*src.Stride + p.X*4
+			s := src.Pix[i : i+4 : i+4]
+			wa := float64(s[3]) * w
+			r += float64(s[0]) * wa
+			g += float64(s[1]) * wa
+			b += float64(s[2]) * wa
+			a += wa
+		} else {
+			wa := float64(bgColor.A) * w
+			r += float64(bgColor.R) * wa
+			g += float64(bgColor.G) * wa
+			b += float64(bgColor.B) * wa
+			a += wa
+		}
+	}
+	if a != 0 {
+		aInv := 1 / a
+		d[0] = clamp(r * aInv)
+		d[1] = clamp(g * aInv)
+		d[2] = clamp(b * aInv)
+		d[3] = clamp(a)
+	}
+}

services/tiktak/vendor/github.com/disintegration/imaging/utils.go

@@ -0,0 +1,167 @@
+package imaging
+
+import (
+	"image"
+	"math"
+	"runtime"
+	"sync"
+)
+
+// parallel processes the data in separate goroutines.
+func parallel(start, stop int, fn func(<-chan int)) {
+	count := stop - start
+	if count < 1 {
+		return
+	}
+
+	procs := runtime.GOMAXPROCS(0)
+	if procs > count {
+		procs = count
+	}
+
+	c := make(chan int, count)
+	for i := start; i < stop; i++ {
+		c <- i
+	}
+	close(c)
+
+	var wg sync.WaitGroup
+	for i := 0; i < procs; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			fn(c)
+		}()
+	}
+	wg.Wait()
+}
+
+// absint returns the absolute value of i.
+func absint(i int) int {
+	if i < 0 {
+		return -i
+	}
+	return i
+}
+
+// clamp rounds and clamps float64 value to fit into uint8.
+func clamp(x float64) uint8 {
+	v := int64(x + 0.5)
+	if v > 255 {
+		return 255
+	}
+	if v > 0 {
+		return uint8(v)
+	}
+	return 0
+}
+
+func reverse(pix []uint8) {
+	if len(pix) <= 4 {
+		return
+	}
+	i := 0
+	j := len(pix) - 4
+	for i < j {
+		pi := pix[i : i+4 : i+4]
+		pj := pix[j : j+4 : j+4]
+		pi[0], pj[0] = pj[0], pi[0]
+		pi[1], pj[1] = pj[1], pi[1]
+		pi[2], pj[2] = pj[2], pi[2]
+		pi[3], pj[3] = pj[3], pi[3]
+		i += 4
+		j -= 4
+	}
+}
+
+func toNRGBA(img image.Image) *image.NRGBA {
+	if img, ok := img.(*image.NRGBA); ok {
+		return &image.NRGBA{
+			Pix:    img.Pix,
+			Stride: img.Stride,
+			Rect:   img.Rect.Sub(img.Rect.Min),
+		}
+	}
+	return Clone(img)
+}
+
+// rgbToHSL converts a color from RGB to HSL.
+func rgbToHSL(r, g, b uint8) (float64, float64, float64) {
+	rr := float64(r) / 255
+	gg := float64(g) / 255
+	bb := float64(b) / 255
+
+	max := math.Max(rr, math.Max(gg, bb))
+	min := math.Min(rr, math.Min(gg, bb))
+
+	l := (max + min) / 2
+
+	if max == min {
+		return 0, 0, l
+	}
+
+	var h, s float64
+	d := max - min
+	if l > 0.5 {
+		s = d / (2 - max - min)
+	} else {
+		s = d / (max + min)
+	}
+
+	switch max {
+	case rr:
+		h = (gg - bb) / d
+		if g < b {
+			h += 6
+		}
+	case gg:
+		h = (bb-rr)/d + 2
+	case bb:
+		h = (rr-gg)/d + 4
+	}
+	h /= 6
+
+	return h, s, l
+}
+
+// hslToRGB converts a color from HSL to RGB.
+func hslToRGB(h, s, l float64) (uint8, uint8, uint8) {
+	var r, g, b float64
+	if s == 0 {
+		v := clamp(l * 255)
+		return v, v, v
+	}
+
+	var q float64
+	if l < 0.5 {
+		q = l * (1 + s)
+	} else {
+		q = l + s - l*s
+	}
+	p := 2*l - q
+
+	r = hueToRGB(p, q, h+1/3.0)
+	g = hueToRGB(p, q, h)
+	b = hueToRGB(p, q, h-1/3.0)
+
+	return clamp(r * 255), clamp(g * 255), clamp(b * 255)
+}
+
+func hueToRGB(p, q, t float64) float64 {
+	if t < 0 {
+		t++
+	}
+	if t > 1 {
+		t--
+	}
+	if t < 1/6.0 {
+		return p + (q-p)*6*t
+	}
+	if t < 1/2.0 {
+		return q
+	}
+	if t < 2/3.0 {
+		return p + (q-p)*(2/3.0-t)*6
+	}
+	return p
+}

services/tiktak/vendor/github.com/go-sql-driver/mysql/.gitignore

@@ -0,0 +1,9 @@
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+Icon?
+ehthumbs.db
+Thumbs.db
+.idea

services/tiktak/vendor/github.com/go-sql-driver/mysql/.travis.yml

@@ -0,0 +1,129 @@
+sudo: false
+language: go
+go:
+  - 1.10.x
+  - 1.11.x
+  - 1.12.x
+  - 1.13.x
+  - master
+
+before_install:
+  - go get golang.org/x/tools/cmd/cover
+  - go get github.com/mattn/goveralls
+
+before_script:
+  - echo -e "[server]\ninnodb_log_file_size=256MB\ninnodb_buffer_pool_size=512MB\nmax_allowed_packet=16MB" | sudo tee -a /etc/mysql/my.cnf
+  - sudo service mysql restart
+  - .travis/wait_mysql.sh
+  - mysql -e 'create database gotest;'
+
+matrix:
+  include:
+    - env: DB=MYSQL8
+      sudo: required
+      dist: trusty
+      go: 1.10.x
+      services:
+        - docker
+      before_install:
+        - go get golang.org/x/tools/cmd/cover
+        - go get github.com/mattn/goveralls
+        - docker pull mysql:8.0
+        - docker run -d -p 127.0.0.1:3307:3306 --name mysqld -e MYSQL_DATABASE=gotest -e MYSQL_USER=gotest -e MYSQL_PASSWORD=secret -e MYSQL_ROOT_PASSWORD=verysecret
+          mysql:8.0 --innodb_log_file_size=256MB --innodb_buffer_pool_size=512MB --max_allowed_packet=16MB --local-infile=1
+        - cp .travis/docker.cnf ~/.my.cnf
+        - .travis/wait_mysql.sh
+      before_script:
+        - export MYSQL_TEST_USER=gotest
+        - export MYSQL_TEST_PASS=secret
+        - export MYSQL_TEST_ADDR=127.0.0.1:3307
+        - export MYSQL_TEST_CONCURRENT=1
+
+    - env: DB=MYSQL57
+      sudo: required
+      dist: trusty
+      go: 1.10.x
+      services:
+        - docker
+      before_install:
+        - go get golang.org/x/tools/cmd/cover
+        - go get github.com/mattn/goveralls
+        - docker pull mysql:5.7
+        - docker run -d -p 127.0.0.1:3307:3306 --name mysqld -e MYSQL_DATABASE=gotest -e MYSQL_USER=gotest -e MYSQL_PASSWORD=secret -e MYSQL_ROOT_PASSWORD=verysecret
+          mysql:5.7 --innodb_log_file_size=256MB --innodb_buffer_pool_size=512MB --max_allowed_packet=16MB --local-infile=1
+        - cp .travis/docker.cnf ~/.my.cnf
+        - .travis/wait_mysql.sh
+      before_script:
+        - export MYSQL_TEST_USER=gotest
+        - export MYSQL_TEST_PASS=secret
+        - export MYSQL_TEST_ADDR=127.0.0.1:3307
+        - export MYSQL_TEST_CONCURRENT=1
+
+    - env: DB=MARIA55
+      sudo: required
+      dist: trusty
+      go: 1.10.x
+      services:
+        - docker
+      before_install:
+        - go get golang.org/x/tools/cmd/cover
+        - go get github.com/mattn/goveralls
+        - docker pull mariadb:5.5
+        - docker run -d -p 127.0.0.1:3307:3306 --name mysqld -e MYSQL_DATABASE=gotest -e MYSQL_USER=gotest -e MYSQL_PASSWORD=secret -e MYSQL_ROOT_PASSWORD=verysecret
+          mariadb:5.5 --innodb_log_file_size=256MB --innodb_buffer_pool_size=512MB --max_allowed_packet=16MB --local-infile=1
+        - cp .travis/docker.cnf ~/.my.cnf
+        - .travis/wait_mysql.sh
+      before_script:
+        - export MYSQL_TEST_USER=gotest
+        - export MYSQL_TEST_PASS=secret
+        - export MYSQL_TEST_ADDR=127.0.0.1:3307
+        - export MYSQL_TEST_CONCURRENT=1
+
+    - env: DB=MARIA10_1
+      sudo: required
+      dist: trusty
+      go: 1.10.x
+      services:
+        - docker
+      before_install:
+        - go get golang.org/x/tools/cmd/cover
+        - go get github.com/mattn/goveralls
+        - docker pull mariadb:10.1
+        - docker run -d -p 127.0.0.1:3307:3306 --name mysqld -e MYSQL_DATABASE=gotest -e MYSQL_USER=gotest -e MYSQL_PASSWORD=secret -e MYSQL_ROOT_PASSWORD=verysecret
+          mariadb:10.1 --innodb_log_file_size=256MB --innodb_buffer_pool_size=512MB --max_allowed_packet=16MB --local-infile=1
+        - cp .travis/docker.cnf ~/.my.cnf
+        - .travis/wait_mysql.sh
+      before_script:
+        - export MYSQL_TEST_USER=gotest
+        - export MYSQL_TEST_PASS=secret
+        - export MYSQL_TEST_ADDR=127.0.0.1:3307
+        - export MYSQL_TEST_CONCURRENT=1
+
+    - os: osx
+      osx_image: xcode10.1
+      addons:
+        homebrew:
+          packages:
+            - mysql
+          update: true
+      go: 1.12.x
+      before_install:
+        - go get golang.org/x/tools/cmd/cover
+        - go get github.com/mattn/goveralls
+      before_script:
+        - echo -e "[server]\ninnodb_log_file_size=256MB\ninnodb_buffer_pool_size=512MB\nmax_allowed_packet=16MB\nlocal_infile=1" >> /usr/local/etc/my.cnf
+        - mysql.server start
+        - mysql -uroot -e 'CREATE USER gotest IDENTIFIED BY "secret"'
+        - mysql -uroot -e 'GRANT ALL ON *.* TO gotest'
+        - mysql -uroot -e 'create database gotest;'
+        - export MYSQL_TEST_USER=gotest
+        - export MYSQL_TEST_PASS=secret
+        - export MYSQL_TEST_ADDR=127.0.0.1:3306
+        - export MYSQL_TEST_CONCURRENT=1
+
+script:
+  - go test -v -covermode=count -coverprofile=coverage.out
+  - go vet ./...
+  - .travis/gofmt.sh
+after_script:
+  - $HOME/gopath/bin/goveralls -coverprofile=coverage.out -service=travis-ci

services/tiktak/vendor/github.com/go-sql-driver/mysql/AUTHORS

@@ -0,0 +1,105 @@
+# This is the official list of Go-MySQL-Driver authors for copyright purposes.
+
+# If you are submitting a patch, please add your name or the name of the
+# organization which holds the copyright to this list in alphabetical order.
+
+# Names should be added to this file as
+#	Name <email address>
+# The email address is not required for organizations.
+# Please keep the list sorted.
+
+
+# Individual Persons
+
+Aaron Hopkins <go-sql-driver at die.net>
+Achille Roussel <achille.roussel at gmail.com>
+Alexey Palazhchenko <alexey.palazhchenko at gmail.com>
+Andrew Reid <andrew.reid at tixtrack.com>
+Arne Hormann <arnehormann at gmail.com>
+Asta Xie <xiemengjun at gmail.com>
+Bulat Gaifullin <gaifullinbf at gmail.com>
+Carlos Nieto <jose.carlos at menteslibres.net>
+Chris Moos <chris at tech9computers.com>
+Craig Wilson <craiggwilson at gmail.com>
+Daniel Montoya <dsmontoyam at gmail.com>
+Daniel Nichter <nil at codenode.com>
+Daniël van Eeden <git at myname.nl>
+Dave Protasowski <dprotaso at gmail.com>
+DisposaBoy <disposaboy at dby.me>
+Egor Smolyakov <egorsmkv at gmail.com>
+Erwan Martin <hello at erwan.io>
+Evan Shaw <evan at vendhq.com>
+Frederick Mayle <frederickmayle at gmail.com>
+Gustavo Kristic <gkristic at gmail.com>
+Hajime Nakagami <nakagami at gmail.com>
+Hanno Braun <mail at hannobraun.com>
+Henri Yandell <flamefew at gmail.com>
+Hirotaka Yamamoto <ymmt2005 at gmail.com>
+Huyiguang <hyg at webterren.com>
+ICHINOSE Shogo <shogo82148 at gmail.com>
+Ilia Cimpoes <ichimpoesh at gmail.com>
+INADA Naoki <songofacandy at gmail.com>
+Jacek Szwec <szwec.jacek at gmail.com>
+James Harr <james.harr at gmail.com>
+Jeff Hodges <jeff at somethingsimilar.com>
+Jeffrey Charles <jeffreycharles at gmail.com>
+Jerome Meyer <jxmeyer at gmail.com>
+Jiajia Zhong <zhong2plus at gmail.com>
+Jian Zhen <zhenjl at gmail.com>
+Joshua Prunier <joshua.prunier at gmail.com>
+Julien Lefevre <julien.lefevr at gmail.com>
+Julien Schmidt <go-sql-driver at julienschmidt.com>
+Justin Li <jli at j-li.net>
+Justin Nuß <nuss.justin at gmail.com>
+Kamil Dziedzic <kamil at klecza.pl>
+Kevin Malachowski <kevin at chowski.com>
+Kieron Woodhouse <kieron.woodhouse at infosum.com>
+Lennart Rudolph <lrudolph at hmc.edu>
+Leonardo YongUk Kim <dalinaum at gmail.com>
+Linh Tran Tuan <linhduonggnu at gmail.com>
+Lion Yang <lion at aosc.xyz>
+Luca Looz <luca.looz92 at gmail.com>
+Lucas Liu <extrafliu at gmail.com>
+Luke Scott <luke at webconnex.com>
+Maciej Zimnoch <maciej.zimnoch at codilime.com>
+Michael Woolnough <michael.woolnough at gmail.com>
+Nathanial Murphy <nathanial.murphy at gmail.com>
+Nicola Peduzzi <thenikso at gmail.com>
+Olivier Mengué <dolmen at cpan.org>
+oscarzhao <oscarzhaosl at gmail.com>
+Paul Bonser <misterpib at gmail.com>
+Peter Schultz <peter.schultz at classmarkets.com>
+Rebecca Chin <rchin at pivotal.io>
+Reed Allman <rdallman10 at gmail.com>
+Richard Wilkes <wilkes at me.com>
+Robert Russell <robert at rrbrussell.com>
+Runrioter Wung <runrioter at gmail.com>
+Shuode Li <elemount at qq.com>
+Simon J Mudd <sjmudd at pobox.com>
+Soroush Pour <me at soroushjp.com>
+Stan Putrya <root.vagner at gmail.com>
+Stanley Gunawan <gunawan.stanley at gmail.com>
+Steven Hartland <steven.hartland at multiplay.co.uk>
+Thomas Wodarek <wodarekwebpage at gmail.com>
+Tim Ruffles <timruffles at gmail.com>
+Tom Jenkinson <tom at tjenkinson.me>
+Vladimir Kovpak <cn007b at gmail.com>
+Xiangyu Hu <xiangyu.hu at outlook.com>
+Xiaobing Jiang <s7v7nislands at gmail.com>
+Xiuming Chen <cc at cxm.cc>
+Zhenye Xie <xiezhenye at gmail.com>
+
+# Organizations
+
+Barracuda Networks, Inc.
+Counting Ltd.
+DigitalOcean Inc.
+Facebook Inc.
+GitHub Inc.
+Google Inc.
+InfoSum Ltd.
+Keybase Inc.
+Multiplay Ltd.
+Percona LLC
+Pivotal Inc.
+Stripe Inc.

services/tiktak/vendor/github.com/go-sql-driver/mysql/CHANGELOG.md

@@ -0,0 +1,206 @@
+## Version 1.5 (2020-01-07)
+
+Changes:
+
+  - Dropped support Go 1.9 and lower (#823, #829, #886, #1016, #1017)
+  - Improve buffer handling (#890)
+  - Document potentially insecure TLS configs (#901)
+  - Use a double-buffering scheme to prevent data races (#943)
+  - Pass uint64 values without converting them to string (#838, #955)
+  - Update collations and make utf8mb4 default (#877, #1054)
+  - Make NullTime compatible with sql.NullTime in Go 1.13+ (#995)
+  - Removed CloudSQL support (#993, #1007)
+  - Add Go Module support (#1003)
+
+New Features:
+
+  - Implement support of optional TLS (#900)
+  - Check connection liveness (#934, #964, #997, #1048, #1051, #1052)
+  - Implement Connector Interface (#941, #958, #1020, #1035)
+
+Bugfixes:
+
+  - Mark connections as bad on error during ping (#875)
+  - Mark connections as bad on error during dial (#867)
+  - Fix connection leak caused by rapid context cancellation (#1024)
+  - Mark connections as bad on error during Conn.Prepare (#1030)
+
+
+## Version 1.4.1 (2018-11-14)
+
+Bugfixes:
+
+ - Fix TIME format for binary columns (#818)
+ - Fix handling of empty auth plugin names (#835)
+ - Fix caching_sha2_password with empty password (#826)
+ - Fix canceled context broke mysqlConn (#862)
+ - Fix OldAuthSwitchRequest support (#870)
+ - Fix Auth Response packet for cleartext password (#887)
+
+## Version 1.4 (2018-06-03)
+
+Changes:
+
+ - Documentation fixes (#530, #535, #567)
+ - Refactoring (#575, #579, #580, #581, #603, #615, #704)
+ - Cache column names (#444)
+ - Sort the DSN parameters in DSNs generated from a config (#637)
+ - Allow native password authentication by default (#644)
+ - Use the default port if it is missing in the DSN (#668)
+ - Removed the `strict` mode (#676)
+ - Do not query `max_allowed_packet` by default (#680)
+ - Dropped support Go 1.6 and lower (#696)
+ - Updated `ConvertValue()` to match the database/sql/driver implementation (#760)
+ - Document the usage of `0000-00-00T00:00:00` as the time.Time zero value (#783)
+ - Improved the compatibility of the authentication system (#807)
+
+New Features:
+
+ - Multi-Results support (#537)
+ - `rejectReadOnly` DSN option (#604)
+ - `context.Context` support (#608, #612, #627, #761)
+ - Transaction isolation level support (#619, #744)
+ - Read-Only transactions support (#618, #634)
+ - `NewConfig` function which initializes a config with default values (#679)
+ - Implemented the `ColumnType` interfaces (#667, #724)
+ - Support for custom string types in `ConvertValue` (#623)
+ - Implemented `NamedValueChecker`, improving support for uint64 with high bit set (#690, #709, #710)
+ - `caching_sha2_password` authentication plugin support (#794, #800, #801, #802)
+ - Implemented `driver.SessionResetter` (#779)
+ - `sha256_password` authentication plugin support (#808)
+
+Bugfixes:
+
+ - Use the DSN hostname as TLS default ServerName if `tls=true` (#564, #718)
+ - Fixed LOAD LOCAL DATA INFILE for empty files (#590)
+ - Removed columns definition cache since it sometimes cached invalid data (#592)
+ - Don't mutate registered TLS configs (#600)
+ - Make RegisterTLSConfig concurrency-safe (#613)
+ - Handle missing auth data in the handshake packet correctly (#646)
+ - Do not retry queries when data was written to avoid data corruption (#302, #736)
+ - Cache the connection pointer for error handling before invalidating it (#678)
+ - Fixed imports for appengine/cloudsql (#700)
+ - Fix sending STMT_LONG_DATA for 0 byte data (#734)
+ - Set correct capacity for []bytes read from length-encoded strings (#766)
+ - Make RegisterDial concurrency-safe (#773)
+
+
+## Version 1.3 (2016-12-01)
+
+Changes:
+
+ - Go 1.1 is no longer supported
+ - Use decimals fields in MySQL to format time types (#249)
+ - Buffer optimizations (#269)
+ - TLS ServerName defaults to the host (#283)
+ - Refactoring (#400, #410, #437)
+ - Adjusted documentation for second generation CloudSQL (#485)
+ - Documented DSN system var quoting rules (#502)
+ - Made statement.Close() calls idempotent to avoid errors in Go 1.6+ (#512)
+
+New Features:
+
+ - Enable microsecond resolution on TIME, DATETIME and TIMESTAMP (#249)
+ - Support for returning table alias on Columns() (#289, #359, #382)
+ - Placeholder interpolation, can be actived with the DSN parameter `interpolateParams=true` (#309, #318, #490)
+ - Support for uint64 parameters with high bit set (#332, #345)
+ - Cleartext authentication plugin support (#327)
+ - Exported ParseDSN function and the Config struct (#403, #419, #429)
+ - Read / Write timeouts (#401)
+ - Support for JSON field type (#414)
+ - Support for multi-statements and multi-results (#411, #431)
+ - DSN parameter to set the driver-side max_allowed_packet value manually (#489)
+ - Native password authentication plugin support (#494, #524)
+
+Bugfixes:
+
+ - Fixed handling of queries without columns and rows (#255)
+ - Fixed a panic when SetKeepAlive() failed (#298)
+ - Handle ERR packets while reading rows (#321)
+ - Fixed reading NULL length-encoded integers in MySQL 5.6+ (#349)
+ - Fixed absolute paths support in LOAD LOCAL DATA INFILE (#356)
+ - Actually zero out bytes in handshake response (#378)
+ - Fixed race condition in registering LOAD DATA INFILE handler (#383)
+ - Fixed tests with MySQL 5.7.9+ (#380)
+ - QueryUnescape TLS config names (#397)
+ - Fixed "broken pipe" error by writing to closed socket (#390)
+ - Fixed LOAD LOCAL DATA INFILE buffering (#424)
+ - Fixed parsing of floats into float64 when placeholders are used (#434)
+ - Fixed DSN tests with Go 1.7+ (#459)
+ - Handle ERR packets while waiting for EOF (#473)
+ - Invalidate connection on error while discarding additional results (#513)
+ - Allow terminating packets of length 0 (#516)
+
+
+## Version 1.2 (2014-06-03)
+
+Changes:
+
+ - We switched back to a "rolling release". `go get` installs the current master branch again
+ - Version v1 of the driver will not be maintained anymore. Go 1.0 is no longer supported by this driver
+ - Exported errors to allow easy checking from application code
+ - Enabled TCP Keepalives on TCP connections
+ - Optimized INFILE handling (better buffer size calculation, lazy init, ...)
+ - The DSN parser also checks for a missing separating slash
+ - Faster binary date / datetime to string formatting
+ - Also exported the MySQLWarning type
+ - mysqlConn.Close returns the first error encountered instead of ignoring all errors
+ - writePacket() automatically writes the packet size to the header
+ - readPacket() uses an iterative approach instead of the recursive approach to merge splitted packets
+
+New Features:
+
+ - `RegisterDial` allows the usage of a custom dial function to establish the network connection
+ - Setting the connection collation is possible with the `collation` DSN parameter. This parameter should be preferred over the `charset` parameter
+ - Logging of critical errors is configurable with `SetLogger`
+ - Google CloudSQL support
+
+Bugfixes:
+
+ - Allow more than 32 parameters in prepared statements
+ - Various old_password fixes
+ - Fixed TestConcurrent test to pass Go's race detection
+ - Fixed appendLengthEncodedInteger for large numbers
+ - Renamed readLengthEnodedString to readLengthEncodedString and skipLengthEnodedString to skipLengthEncodedString (fixed typo)
+
+
+## Version 1.1 (2013-11-02)
+
+Changes:
+
+  - Go-MySQL-Driver now requires Go 1.1
+  - Connections now use the collation `utf8_general_ci` by default. Adding `&charset=UTF8` to the DSN should not be necessary anymore
+  - Made closing rows and connections error tolerant. This allows for example deferring rows.Close() without checking for errors
+  - `[]byte(nil)` is now treated as a NULL value. Before, it was treated like an empty string / `[]byte("")`
+  - DSN parameter values must now be url.QueryEscape'ed. This allows text values to contain special characters, such as '&'.
+  - Use the IO buffer also for writing. This results in zero allocations (by the driver) for most queries
+  - Optimized the buffer for reading
+  - stmt.Query now caches column metadata
+  - New Logo
+  - Changed the copyright header to include all contributors
+  - Improved the LOAD INFILE documentation
+  - The driver struct is now exported to make the driver directly accessible
+  - Refactored the driver tests
+  - Added more benchmarks and moved all to a separate file
+  - Other small refactoring
+
+New Features:
+
+  - Added *old_passwords* support: Required in some cases, but must be enabled by adding `allowOldPasswords=true` to the DSN since it is insecure
+  - Added a `clientFoundRows` parameter: Return the number of matching rows instead of the number of rows changed on UPDATEs
+  - Added TLS/SSL support: Use a TLS/SSL encrypted connection to the server. Custom TLS configs can be registered and used
+
+Bugfixes:
+
+  - Fixed MySQL 4.1 support: MySQL 4.1 sends packets with lengths which differ from the specification
+  - Convert to DB timezone when inserting `time.Time`
+  - Splitted packets (more than 16MB) are now merged correctly
+  - Fixed false positive `io.EOF` errors when the data was fully read
+  - Avoid panics on reuse of closed connections
+  - Fixed empty string producing false nil values
+  - Fixed sign byte for positive TIME fields
+
+
+## Version 1.0 (2013-05-14)
+
+Initial Release

services/tiktak/vendor/github.com/go-sql-driver/mysql/LICENSE

@@ -0,0 +1,373 @@
+Mozilla Public License Version 2.0
+==================================
+
+1. Definitions
+--------------
+
+1.1. "Contributor"
+    means each individual or legal entity that creates, contributes to
+    the creation of, or owns Covered Software.
+
+1.2. "Contributor Version"
+    means the combination of the Contributions of others (if any) used
+    by a Contributor and that particular Contributor's Contribution.
+
+1.3. "Contribution"
+    means Covered Software of a particular Contributor.
+
+1.4. "Covered Software"
+    means Source Code Form to which the initial Contributor has attached
+    the notice in Exhibit A, the Executable Form of such Source Code
+    Form, and Modifications of such Source Code Form, in each case
+    including portions thereof.
+
+1.5. "Incompatible With Secondary Licenses"
+    means
+
+    (a) that the initial Contributor has attached the notice described
+        in Exhibit B to the Covered Software; or
+
+    (b) that the Covered Software was made available under the terms of
+        version 1.1 or earlier of the License, but not also under the
+        terms of a Secondary License.
+
+1.6. "Executable Form"
+    means any form of the work other than Source Code Form.
+
+1.7. "Larger Work"
+    means a work that combines Covered Software with other material, in 
+    a separate file or files, that is not Covered Software.
+
+1.8. "License"
+    means this document.
+
+1.9. "Licensable"
+    means having the right to grant, to the maximum extent possible,
+    whether at the time of the initial grant or subsequently, any and
+    all of the rights conveyed by this License.
+
+1.10. "Modifications"
+    means any of the following:
+
+    (a) any file in Source Code Form that results from an addition to,
+        deletion from, or modification of the contents of Covered
+        Software; or
+
+    (b) any new file in Source Code Form that contains any Covered
+        Software.
+
+1.11. "Patent Claims" of a Contributor
+    means any patent claim(s), including without limitation, method,
+    process, and apparatus claims, in any patent Licensable by such
+    Contributor that would be infringed, but for the grant of the
+    License, by the making, using, selling, offering for sale, having
+    made, import, or transfer of either its Contributions or its
+    Contributor Version.
+
+1.12. "Secondary License"
+    means either the GNU General Public License, Version 2.0, the GNU
+    Lesser General Public License, Version 2.1, the GNU Affero General
+    Public License, Version 3.0, or any later versions of those
+    licenses.
+
+1.13. "Source Code Form"
+    means the form of the work preferred for making modifications.
+
+1.14. "You" (or "Your")
+    means an individual or a legal entity exercising rights under this
+    License. For legal entities, "You" includes any entity that
+    controls, is controlled by, or is under common control with You. For
+    purposes of this definition, "control" means (a) the power, direct
+    or indirect, to cause the direction or management of such entity,
+    whether by contract or otherwise, or (b) ownership of more than
+    fifty percent (50%) of the outstanding shares or beneficial
+    ownership of such entity.
+
+2. License Grants and Conditions
+--------------------------------
+
+2.1. Grants
+
+Each Contributor hereby grants You a world-wide, royalty-free,
+non-exclusive license:
+
+(a) under intellectual property rights (other than patent or trademark)
+    Licensable by such Contributor to use, reproduce, make available,
+    modify, display, perform, distribute, and otherwise exploit its
+    Contributions, either on an unmodified basis, with Modifications, or
+    as part of a Larger Work; and
+
+(b) under Patent Claims of such Contributor to make, use, sell, offer
+    for sale, have made, import, and otherwise transfer either its
+    Contributions or its Contributor Version.
+
+2.2. Effective Date
+
+The licenses granted in Section 2.1 with respect to any Contribution
+become effective for each Contribution on the date the Contributor first
+distributes such Contribution.
+
+2.3. Limitations on Grant Scope
+
+The licenses granted in this Section 2 are the only rights granted under
+this License. No additional rights or licenses will be implied from the
+distribution or licensing of Covered Software under this License.
+Notwithstanding Section 2.1(b) above, no patent license is granted by a
+Contributor:
+
+(a) for any code that a Contributor has removed from Covered Software;
+    or
+
+(b) for infringements caused by: (i) Your and any other third party's
+    modifications of Covered Software, or (ii) the combination of its
+    Contributions with other software (except as part of its Contributor
+    Version); or
+
+(c) under Patent Claims infringed by Covered Software in the absence of
+    its Contributions.
+
+This License does not grant any rights in the trademarks, service marks,
+or logos of any Contributor (except as may be necessary to comply with
+the notice requirements in Section 3.4).
+
+2.4. Subsequent Licenses
+
+No Contributor makes additional grants as a result of Your choice to
+distribute the Covered Software under a subsequent version of this
+License (see Section 10.2) or under the terms of a Secondary License (if
+permitted under the terms of Section 3.3).
+
+2.5. Representation
+
+Each Contributor represents that the Contributor believes its
+Contributions are its original creation(s) or it has sufficient rights
+to grant the rights to its Contributions conveyed by this License.
+
+2.6. Fair Use
+
+This License is not intended to limit any rights You have under
+applicable copyright doctrines of fair use, fair dealing, or other
+equivalents.
+
+2.7. Conditions
+
+Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
+in Section 2.1.
+
+3. Responsibilities
+-------------------
+
+3.1. Distribution of Source Form
+
+All distribution of Covered Software in Source Code Form, including any
+Modifications that You create or to which You contribute, must be under
+the terms of this License. You must inform recipients that the Source
+Code Form of the Covered Software is governed by the terms of this
+License, and how they can obtain a copy of this License. You may not
+attempt to alter or restrict the recipients' rights in the Source Code
+Form.
+
+3.2. Distribution of Executable Form
+
+If You distribute Covered Software in Executable Form then:
+
+(a) such Covered Software must also be made available in Source Code
+    Form, as described in Section 3.1, and You must inform recipients of
+    the Executable Form how they can obtain a copy of such Source Code
+    Form by reasonable means in a timely manner, at a charge no more
+    than the cost of distribution to the recipient; and
+
+(b) You may distribute such Executable Form under the terms of this
+    License, or sublicense it under different terms, provided that the
+    license for the Executable Form does not attempt to limit or alter
+    the recipients' rights in the Source Code Form under this License.
+
+3.3. Distribution of a Larger Work
+
+You may create and distribute a Larger Work under terms of Your choice,
+provided that You also comply with the requirements of this License for
+the Covered Software. If the Larger Work is a combination of Covered
+Software with a work governed by one or more Secondary Licenses, and the
+Covered Software is not Incompatible With Secondary Licenses, this
+License permits You to additionally distribute such Covered Software
+under the terms of such Secondary License(s), so that the recipient of
+the Larger Work may, at their option, further distribute the Covered
+Software under the terms of either this License or such Secondary
+License(s).
+
+3.4. Notices
+
+You may not remove or alter the substance of any license notices
+(including copyright notices, patent notices, disclaimers of warranty,
+or limitations of liability) contained within the Source Code Form of
+the Covered Software, except that You may alter any license notices to
+the extent required to remedy known factual inaccuracies.
+
+3.5. Application of Additional Terms
+
+You may choose to offer, and to charge a fee for, warranty, support,
+indemnity or liability obligations to one or more recipients of Covered
+Software. However, You may do so only on Your own behalf, and not on
+behalf of any Contributor. You must make it absolutely clear that any
+such warranty, support, indemnity, or liability obligation is offered by
+You alone, and You hereby agree to indemnify every Contributor for any
+liability incurred by such Contributor as a result of warranty, support,
+indemnity or liability terms You offer. You may include additional
+disclaimers of warranty and limitations of liability specific to any
+jurisdiction.
+
+4. Inability to Comply Due to Statute or Regulation
+---------------------------------------------------
+
+If it is impossible for You to comply with any of the terms of this
+License with respect to some or all of the Covered Software due to
+statute, judicial order, or regulation then You must: (a) comply with
+the terms of this License to the maximum extent possible; and (b)
+describe the limitations and the code they affect. Such description must
+be placed in a text file included with all distributions of the Covered
+Software under this License. Except to the extent prohibited by statute
+or regulation, such description must be sufficiently detailed for a
+recipient of ordinary skill to be able to understand it.
+
+5. Termination
+--------------
+
+5.1. The rights granted under this License will terminate automatically
+if You fail to comply with any of its terms. However, if You become
+compliant, then the rights granted under this License from a particular
+Contributor are reinstated (a) provisionally, unless and until such
+Contributor explicitly and finally terminates Your grants, and (b) on an
+ongoing basis, if such Contributor fails to notify You of the
+non-compliance by some reasonable means prior to 60 days after You have
+come back into compliance. Moreover, Your grants from a particular
+Contributor are reinstated on an ongoing basis if such Contributor
+notifies You of the non-compliance by some reasonable means, this is the
+first time You have received notice of non-compliance with this License
+from such Contributor, and You become compliant prior to 30 days after
+Your receipt of the notice.
+
+5.2. If You initiate litigation against any entity by asserting a patent
+infringement claim (excluding declaratory judgment actions,
+counter-claims, and cross-claims) alleging that a Contributor Version
+directly or indirectly infringes any patent, then the rights granted to
+You by any and all Contributors for the Covered Software under Section
+2.1 of this License shall terminate.
+
+5.3. In the event of termination under Sections 5.1 or 5.2 above, all
+end user license agreements (excluding distributors and resellers) which
+have been validly granted by You or Your distributors under this License
+prior to termination shall survive termination.
+
+************************************************************************
+*                                                                      *
+*  6. Disclaimer of Warranty                                           *
+*  -------------------------                                           *
+*                                                                      *
+*  Covered Software is provided under this License on an "as is"       *
+*  basis, without warranty of any kind, either expressed, implied, or  *
+*  statutory, including, without limitation, warranties that the       *
+*  Covered Software is free of defects, merchantable, fit for a        *
+*  particular purpose or non-infringing. The entire risk as to the     *
+*  quality and performance of the Covered Software is with You.        *
+*  Should any Covered Software prove defective in any respect, You     *
+*  (not any Contributor) assume the cost of any necessary servicing,   *
+*  repair, or correction. This disclaimer of warranty constitutes an   *
+*  essential part of this License. No use of any Covered Software is   *
+*  authorized under this License except under this disclaimer.         *
+*                                                                      *
+************************************************************************
+
+************************************************************************
+*                                                                      *
+*  7. Limitation of Liability                                          *
+*  --------------------------                                          *
+*                                                                      *
+*  Under no circumstances and under no legal theory, whether tort      *
+*  (including negligence), contract, or otherwise, shall any           *
+*  Contributor, or anyone who distributes Covered Software as          *
+*  permitted above, be liable to You for any direct, indirect,         *
+*  special, incidental, or consequential damages of any character      *
+*  including, without limitation, damages for lost profits, loss of    *
+*  goodwill, work stoppage, computer failure or malfunction, or any    *
+*  and all other commercial damages or losses, even if such party      *
+*  shall have been informed of the possibility of such damages. This   *
+*  limitation of liability shall not apply to liability for death or   *
+*  personal injury resulting from such party's negligence to the       *
+*  extent applicable law prohibits such limitation. Some               *
+*  jurisdictions do not allow the exclusion or limitation of           *
+*  incidental or consequential damages, so this exclusion and          *
+*  limitation may not apply to You.                                    *
+*                                                                      *
+************************************************************************
+
+8. Litigation
+-------------
+
+Any litigation relating to this License may be brought only in the
+courts of a jurisdiction where the defendant maintains its principal
+place of business and such litigation shall be governed by laws of that
+jurisdiction, without reference to its conflict-of-law provisions.
+Nothing in this Section shall prevent a party's ability to bring
+cross-claims or counter-claims.
+
+9. Miscellaneous
+----------------
+
+This License represents the complete agreement concerning the subject
+matter hereof. If any provision of this License is held to be
+unenforceable, such provision shall be reformed only to the extent
+necessary to make it enforceable. Any law or regulation which provides
+that the language of a contract shall be construed against the drafter
+shall not be used to construe this License against a Contributor.
+
+10. Versions of the License
+---------------------------
+
+10.1. New Versions
+
+Mozilla Foundation is the license steward. Except as provided in Section
+10.3, no one other than the license steward has the right to modify or
+publish new versions of this License. Each version will be given a
+distinguishing version number.
+
+10.2. Effect of New Versions
+
+You may distribute the Covered Software under the terms of the version
+of the License under which You originally received the Covered Software,
+or under the terms of any subsequent version published by the license
+steward.
+
+10.3. Modified Versions
+
+If you create software not governed by this License, and you want to
+create a new license for such software, you may create and use a
+modified version of this License if you rename the license and remove
+any references to the name of the license steward (except to note that
+such modified license differs from this License).
+
+10.4. Distributing Source Code Form that is Incompatible With Secondary
+Licenses
+
+If You choose to distribute Source Code Form that is Incompatible With
+Secondary Licenses under the terms of this version of the License, the
+notice described in Exhibit B of this License must be attached.
+
+Exhibit A - Source Code Form License Notice
+-------------------------------------------
+
+  This Source Code Form is subject to the terms of the Mozilla Public
+  License, v. 2.0. If a copy of the MPL was not distributed with this
+  file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular
+file, then You may include the notice in a location (such as a LICENSE
+file in a relevant directory) where a recipient would be likely to look
+for such a notice.
+
+You may add additional accurate notices of copyright ownership.
+
+Exhibit B - "Incompatible With Secondary Licenses" Notice
+---------------------------------------------------------
+
+  This Source Code Form is "Incompatible With Secondary Licenses", as
+  defined by the Mozilla Public License, v. 2.0.

services/tiktak/vendor/github.com/go-sql-driver/mysql/README.md

@@ -0,0 +1,501 @@
+# Go-MySQL-Driver
+
+A MySQL-Driver for Go's [database/sql](https://golang.org/pkg/database/sql/) package
+
+![Go-MySQL-Driver logo](https://raw.github.com/wiki/go-sql-driver/mysql/gomysql_m.png "Golang Gopher holding the MySQL Dolphin")
+
+---------------------------------------
+  * [Features](#features)
+  * [Requirements](#requirements)
+  * [Installation](#installation)
+  * [Usage](#usage)
+    * [DSN (Data Source Name)](#dsn-data-source-name)
+      * [Password](#password)
+      * [Protocol](#protocol)
+      * [Address](#address)
+      * [Parameters](#parameters)
+      * [Examples](#examples)
+    * [Connection pool and timeouts](#connection-pool-and-timeouts)
+    * [context.Context Support](#contextcontext-support)
+    * [ColumnType Support](#columntype-support)
+    * [LOAD DATA LOCAL INFILE support](#load-data-local-infile-support)
+    * [time.Time support](#timetime-support)
+    * [Unicode support](#unicode-support)
+  * [Testing / Development](#testing--development)
+  * [License](#license)
+
+---------------------------------------
+
+## Features
+  * Lightweight and [fast](https://github.com/go-sql-driver/sql-benchmark "golang MySQL-Driver performance")
+  * Native Go implementation. No C-bindings, just pure Go
+  * Connections over TCP/IPv4, TCP/IPv6, Unix domain sockets or [custom protocols](https://godoc.org/github.com/go-sql-driver/mysql#DialFunc)
+  * Automatic handling of broken connections
+  * Automatic Connection Pooling *(by database/sql package)*
+  * Supports queries larger than 16MB
+  * Full [`sql.RawBytes`](https://golang.org/pkg/database/sql/#RawBytes) support.
+  * Intelligent `LONG DATA` handling in prepared statements
+  * Secure `LOAD DATA LOCAL INFILE` support with file Whitelisting and `io.Reader` support
+  * Optional `time.Time` parsing
+  * Optional placeholder interpolation
+
+## Requirements
+  * Go 1.10 or higher. We aim to support the 3 latest versions of Go.
+  * MySQL (4.1+), MariaDB, Percona Server, Google CloudSQL or Sphinx (2.2.3+)
+
+---------------------------------------
+
+## Installation
+Simple install the package to your [$GOPATH](https://github.com/golang/go/wiki/GOPATH "GOPATH") with the [go tool](https://golang.org/cmd/go/ "go command") from shell:
+```bash
+$ go get -u github.com/go-sql-driver/mysql
+```
+Make sure [Git is installed](https://git-scm.com/downloads) on your machine and in your system's `PATH`.
+
+## Usage
+_Go MySQL Driver_ is an implementation of Go's `database/sql/driver` interface. You only need to import the driver and can use the full [`database/sql`](https://golang.org/pkg/database/sql/) API then.
+
+Use `mysql` as `driverName` and a valid [DSN](#dsn-data-source-name)  as `dataSourceName`:
+```go
+import "database/sql"
+import _ "github.com/go-sql-driver/mysql"
+
+db, err := sql.Open("mysql", "user:password@/dbname")
+```
+
+[Examples are available in our Wiki](https://github.com/go-sql-driver/mysql/wiki/Examples "Go-MySQL-Driver Examples").
+
+
+### DSN (Data Source Name)
+
+The Data Source Name has a common format, like e.g. [PEAR DB](http://pear.php.net/manual/en/package.database.db.intro-dsn.php) uses it, but without type-prefix (optional parts marked by squared brackets):
+```
+[username[:password]@][protocol[(address)]]/dbname[?param1=value1&...&paramN=valueN]
+```
+
+A DSN in its fullest form:
+```
+username:password@protocol(address)/dbname?param=value
+```
+
+Except for the databasename, all values are optional. So the minimal DSN is:
+```
+/dbname
+```
+
+If you do not want to preselect a database, leave `dbname` empty:
+```
+/
+```
+This has the same effect as an empty DSN string:
+```
+
+```
+
+Alternatively, [Config.FormatDSN](https://godoc.org/github.com/go-sql-driver/mysql#Config.FormatDSN) can be used to create a DSN string by filling a struct.
+
+#### Password
+Passwords can consist of any character. Escaping is **not** necessary.
+
+#### Protocol
+See [net.Dial](https://golang.org/pkg/net/#Dial) for more information which networks are available.
+In general you should use an Unix domain socket if available and TCP otherwise for best performance.
+
+#### Address
+For TCP and UDP networks, addresses have the form `host[:port]`.
+If `port` is omitted, the default port will be used.
+If `host` is a literal IPv6 address, it must be enclosed in square brackets.
+The functions [net.JoinHostPort](https://golang.org/pkg/net/#JoinHostPort) and [net.SplitHostPort](https://golang.org/pkg/net/#SplitHostPort) manipulate addresses in this form.
+
+For Unix domain sockets the address is the absolute path to the MySQL-Server-socket, e.g. `/var/run/mysqld/mysqld.sock` or `/tmp/mysql.sock`.
+
+#### Parameters
+*Parameters are case-sensitive!*
+
+Notice that any of `true`, `TRUE`, `True` or `1` is accepted to stand for a true boolean value. Not surprisingly, false can be specified as any of: `false`, `FALSE`, `False` or `0`.
+
+##### `allowAllFiles`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        false
+```
+
+`allowAllFiles=true` disables the file Whitelist for `LOAD DATA LOCAL INFILE` and allows *all* files.
+[*Might be insecure!*](http://dev.mysql.com/doc/refman/5.7/en/load-data-local.html)
+
+##### `allowCleartextPasswords`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        false
+```
+
+`allowCleartextPasswords=true` allows using the [cleartext client side plugin](http://dev.mysql.com/doc/en/cleartext-authentication-plugin.html) if required by an account, such as one defined with the [PAM authentication plugin](http://dev.mysql.com/doc/en/pam-authentication-plugin.html). Sending passwords in clear text may be a security problem in some configurations. To avoid problems if there is any possibility that the password would be intercepted, clients should connect to MySQL Server using a method that protects the password. Possibilities include [TLS / SSL](#tls), IPsec, or a private network.
+
+##### `allowNativePasswords`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        true
+```
+`allowNativePasswords=false` disallows the usage of MySQL native password method.
+
+##### `allowOldPasswords`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        false
+```
+`allowOldPasswords=true` allows the usage of the insecure old password method. This should be avoided, but is necessary in some cases. See also [the old_passwords wiki page](https://github.com/go-sql-driver/mysql/wiki/old_passwords).
+
+##### `charset`
+
+```
+Type:           string
+Valid Values:   <name>
+Default:        none
+```
+
+Sets the charset used for client-server interaction (`"SET NAMES <value>"`). If multiple charsets are set (separated by a comma), the following charset is used if setting the charset failes. This enables for example support for `utf8mb4` ([introduced in MySQL 5.5.3](http://dev.mysql.com/doc/refman/5.5/en/charset-unicode-utf8mb4.html)) with fallback to `utf8` for older servers (`charset=utf8mb4,utf8`).
+
+Usage of the `charset` parameter is discouraged because it issues additional queries to the server.
+Unless you need the fallback behavior, please use `collation` instead.
+
+##### `checkConnLiveness`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        true
+```
+
+On supported platforms connections retrieved from the connection pool are checked for liveness before using them. If the check fails, the respective connection is marked as bad and the query retried with another connection.
+`checkConnLiveness=false` disables this liveness check of connections.
+
+##### `collation`
+
+```
+Type:           string
+Valid Values:   <name>
+Default:        utf8mb4_general_ci
+```
+
+Sets the collation used for client-server interaction on connection. In contrast to `charset`, `collation` does not issue additional queries. If the specified collation is unavailable on the target server, the connection will fail.
+
+A list of valid charsets for a server is retrievable with `SHOW COLLATION`.
+
+The default collation (`utf8mb4_general_ci`) is supported from MySQL 5.5.  You should use an older collation (e.g. `utf8_general_ci`) for older MySQL.
+
+Collations for charset "ucs2", "utf16", "utf16le", and "utf32" can not be used ([ref](https://dev.mysql.com/doc/refman/5.7/en/charset-connection.html#charset-connection-impermissible-client-charset)).
+
+
+##### `clientFoundRows`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        false
+```
+
+`clientFoundRows=true` causes an UPDATE to return the number of matching rows instead of the number of rows changed.
+
+##### `columnsWithAlias`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        false
+```
+
+When `columnsWithAlias` is true, calls to `sql.Rows.Columns()` will return the table alias and the column name separated by a dot. For example:
+
+```
+SELECT u.id FROM users as u
+```
+
+will return `u.id` instead of just `id` if `columnsWithAlias=true`.
+
+##### `interpolateParams`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        false
+```
+
+If `interpolateParams` is true, placeholders (`?`) in calls to `db.Query()` and `db.Exec()` are interpolated into a single query string with given parameters. This reduces the number of roundtrips, since the driver has to prepare a statement, execute it with given parameters and close the statement again with `interpolateParams=false`.
+
+*This can not be used together with the multibyte encodings BIG5, CP932, GB2312, GBK or SJIS. These are blacklisted as they may [introduce a SQL injection vulnerability](http://stackoverflow.com/a/12118602/3430118)!*
+
+##### `loc`
+
+```
+Type:           string
+Valid Values:   <escaped name>
+Default:        UTC
+```
+
+Sets the location for time.Time values (when using `parseTime=true`). *"Local"* sets the system's location. See [time.LoadLocation](https://golang.org/pkg/time/#LoadLocation) for details.
+
+Note that this sets the location for time.Time values but does not change MySQL's [time_zone setting](https://dev.mysql.com/doc/refman/5.5/en/time-zone-support.html). For that see the [time_zone system variable](#system-variables), which can also be set as a DSN parameter.
+
+Please keep in mind, that param values must be [url.QueryEscape](https://golang.org/pkg/net/url/#QueryEscape)'ed. Alternatively you can manually replace the `/` with `%2F`. For example `US/Pacific` would be `loc=US%2FPacific`.
+
+##### `maxAllowedPacket`
+```
+Type:          decimal number
+Default:       4194304
+```
+
+Max packet size allowed in bytes. The default value is 4 MiB and should be adjusted to match the server settings. `maxAllowedPacket=0` can be used to automatically fetch the `max_allowed_packet` variable from server *on every connection*.
+
+##### `multiStatements`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        false
+```
+
+Allow multiple statements in one query. While this allows batch queries, it also greatly increases the risk of SQL injections. Only the result of the first query is returned, all other results are silently discarded.
+
+When `multiStatements` is used, `?` parameters must only be used in the first statement.
+
+##### `parseTime`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        false
+```
+
+`parseTime=true` changes the output type of `DATE` and `DATETIME` values to `time.Time` instead of `[]byte` / `string`
+The date or datetime like `0000-00-00 00:00:00` is converted into zero value of `time.Time`.
+
+
+##### `readTimeout`
+
+```
+Type:           duration
+Default:        0
+```
+
+I/O read timeout. The value must be a decimal number with a unit suffix (*"ms"*, *"s"*, *"m"*, *"h"*), such as *"30s"*, *"0.5m"* or *"1m30s"*.
+
+##### `rejectReadOnly`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        false
+```
+
+
+`rejectReadOnly=true` causes the driver to reject read-only connections. This
+is for a possible race condition during an automatic failover, where the mysql
+client gets connected to a read-only replica after the failover.
+
+Note that this should be a fairly rare case, as an automatic failover normally
+happens when the primary is down, and the race condition shouldn't happen
+unless it comes back up online as soon as the failover is kicked off. On the
+other hand, when this happens, a MySQL application can get stuck on a
+read-only connection until restarted. It is however fairly easy to reproduce,
+for example, using a manual failover on AWS Aurora's MySQL-compatible cluster.
+
+If you are not relying on read-only transactions to reject writes that aren't
+supposed to happen, setting this on some MySQL providers (such as AWS Aurora)
+is safer for failovers.
+
+Note that ERROR 1290 can be returned for a `read-only` server and this option will
+cause a retry for that error. However the same error number is used for some
+other cases. You should ensure your application will never cause an ERROR 1290
+except for `read-only` mode when enabling this option.
+
+
+##### `serverPubKey`
+
+```
+Type:           string
+Valid Values:   <name>
+Default:        none
+```
+
+Server public keys can be registered with [`mysql.RegisterServerPubKey`](https://godoc.org/github.com/go-sql-driver/mysql#RegisterServerPubKey), which can then be used by the assigned name in the DSN.
+Public keys are used to transmit encrypted data, e.g. for authentication.
+If the server's public key is known, it should be set manually to avoid expensive and potentially insecure transmissions of the public key from the server to the client each time it is required.
+
+
+##### `timeout`
+
+```
+Type:           duration
+Default:        OS default
+```
+
+Timeout for establishing connections, aka dial timeout. The value must be a decimal number with a unit suffix (*"ms"*, *"s"*, *"m"*, *"h"*), such as *"30s"*, *"0.5m"* or *"1m30s"*.
+
+
+##### `tls`
+
+```
+Type:           bool / string
+Valid Values:   true, false, skip-verify, preferred, <name>
+Default:        false
+```
+
+`tls=true` enables TLS / SSL encrypted connection to the server. Use `skip-verify` if you want to use a self-signed or invalid certificate (server side) or use `preferred` to use TLS only when advertised by the server. This is similar to `skip-verify`, but additionally allows a fallback to a connection which is not encrypted. Neither `skip-verify` nor `preferred` add any reliable security. You can use a custom TLS config after registering it with [`mysql.RegisterTLSConfig`](https://godoc.org/github.com/go-sql-driver/mysql#RegisterTLSConfig).
+
+
+##### `writeTimeout`
+
+```
+Type:           duration
+Default:        0
+```
+
+I/O write timeout. The value must be a decimal number with a unit suffix (*"ms"*, *"s"*, *"m"*, *"h"*), such as *"30s"*, *"0.5m"* or *"1m30s"*.
+
+
+##### System Variables
+
+Any other parameters are interpreted as system variables:
+  * `<boolean_var>=<value>`: `SET <boolean_var>=<value>`
+  * `<enum_var>=<value>`: `SET <enum_var>=<value>`
+  * `<string_var>=%27<value>%27`: `SET <string_var>='<value>'`
+
+Rules:
+* The values for string variables must be quoted with `'`.
+* The values must also be [url.QueryEscape](http://golang.org/pkg/net/url/#QueryEscape)'ed!
+ (which implies values of string variables must be wrapped with `%27`).
+
+Examples:
+  * `autocommit=1`: `SET autocommit=1`
+  * [`time_zone=%27Europe%2FParis%27`](https://dev.mysql.com/doc/refman/5.5/en/time-zone-support.html): `SET time_zone='Europe/Paris'`
+  * [`tx_isolation=%27REPEATABLE-READ%27`](https://dev.mysql.com/doc/refman/5.5/en/server-system-variables.html#sysvar_tx_isolation): `SET tx_isolation='REPEATABLE-READ'`
+
+
+#### Examples
+```
+user@unix(/path/to/socket)/dbname
+```
+
+```
+root:pw@unix(/tmp/mysql.sock)/myDatabase?loc=Local
+```
+
+```
+user:password@tcp(localhost:5555)/dbname?tls=skip-verify&autocommit=true
+```
+
+Treat warnings as errors by setting the system variable [`sql_mode`](https://dev.mysql.com/doc/refman/5.7/en/sql-mode.html):
+```
+user:password@/dbname?sql_mode=TRADITIONAL
+```
+
+TCP via IPv6:
+```
+user:password@tcp([de:ad:be:ef::ca:fe]:80)/dbname?timeout=90s&collation=utf8mb4_unicode_ci
+```
+
+TCP on a remote host, e.g. Amazon RDS:
+```
+id:password@tcp(your-amazonaws-uri.com:3306)/dbname
+```
+
+Google Cloud SQL on App Engine:
+```
+user:password@unix(/cloudsql/project-id:region-name:instance-name)/dbname
+```
+
+TCP using default port (3306) on localhost:
+```
+user:password@tcp/dbname?charset=utf8mb4,utf8&sys_var=esc%40ped
+```
+
+Use the default protocol (tcp) and host (localhost:3306):
+```
+user:password@/dbname
+```
+
+No Database preselected:
+```
+user:password@/
+```
+
+
+### Connection pool and timeouts
+The connection pool is managed by Go's database/sql package. For details on how to configure the size of the pool and how long connections stay in the pool see `*DB.SetMaxOpenConns`, `*DB.SetMaxIdleConns`, and `*DB.SetConnMaxLifetime` in the [database/sql documentation](https://golang.org/pkg/database/sql/). The read, write, and dial timeouts for each individual connection are configured with the DSN parameters [`readTimeout`](#readtimeout), [`writeTimeout`](#writetimeout), and [`timeout`](#timeout), respectively.
+
+## `ColumnType` Support
+This driver supports the [`ColumnType` interface](https://golang.org/pkg/database/sql/#ColumnType) introduced in Go 1.8, with the exception of [`ColumnType.Length()`](https://golang.org/pkg/database/sql/#ColumnType.Length), which is currently not supported.
+
+## `context.Context` Support
+Go 1.8 added `database/sql` support for `context.Context`. This driver supports query timeouts and cancellation via contexts.
+See [context support in the database/sql package](https://golang.org/doc/go1.8#database_sql) for more details.
+
+
+### `LOAD DATA LOCAL INFILE` support
+For this feature you need direct access to the package. Therefore you must change the import path (no `_`):
+```go
+import "github.com/go-sql-driver/mysql"
+```
+
+Files must be whitelisted by registering them with `mysql.RegisterLocalFile(filepath)` (recommended) or the Whitelist check must be deactivated by using the DSN parameter `allowAllFiles=true` ([*Might be insecure!*](http://dev.mysql.com/doc/refman/5.7/en/load-data-local.html)).
+
+To use a `io.Reader` a handler function must be registered with `mysql.RegisterReaderHandler(name, handler)` which returns a `io.Reader` or `io.ReadCloser`. The Reader is available with the filepath `Reader::<name>` then. Choose different names for different handlers and `DeregisterReaderHandler` when you don't need it anymore.
+
+See the [godoc of Go-MySQL-Driver](https://godoc.org/github.com/go-sql-driver/mysql "golang mysql driver documentation") for details.
+
+
+### `time.Time` support
+The default internal output type of MySQL `DATE` and `DATETIME` values is `[]byte` which allows you to scan the value into a `[]byte`, `string` or `sql.RawBytes` variable in your program.
+
+However, many want to scan MySQL `DATE` and `DATETIME` values into `time.Time` variables, which is the logical equivalent in Go to `DATE` and `DATETIME` in MySQL. You can do that by changing the internal output type from `[]byte` to `time.Time` with the DSN parameter `parseTime=true`. You can set the default [`time.Time` location](https://golang.org/pkg/time/#Location) with the `loc` DSN parameter.
+
+**Caution:** As of Go 1.1, this makes `time.Time` the only variable type you can scan `DATE` and `DATETIME` values into. This breaks for example [`sql.RawBytes` support](https://github.com/go-sql-driver/mysql/wiki/Examples#rawbytes).
+
+Alternatively you can use the [`NullTime`](https://godoc.org/github.com/go-sql-driver/mysql#NullTime) type as the scan destination, which works with both `time.Time` and `string` / `[]byte`.
+
+
+### Unicode support
+Since version 1.5 Go-MySQL-Driver automatically uses the collation ` utf8mb4_general_ci` by default.
+
+Other collations / charsets can be set using the [`collation`](#collation) DSN parameter.
+
+Version 1.0 of the driver recommended adding `&charset=utf8` (alias for `SET NAMES utf8`) to the DSN to enable proper UTF-8 support. This is not necessary anymore. The [`collation`](#collation) parameter should be preferred to set another collation / charset than the default.
+
+See http://dev.mysql.com/doc/refman/8.0/en/charset-unicode.html for more details on MySQL's Unicode support.
+
+## Testing / Development
+To run the driver tests you may need to adjust the configuration. See the [Testing Wiki-Page](https://github.com/go-sql-driver/mysql/wiki/Testing "Testing") for details.
+
+Go-MySQL-Driver is not feature-complete yet. Your help is very appreciated.
+If you want to contribute, you can work on an [open issue](https://github.com/go-sql-driver/mysql/issues?state=open) or review a [pull request](https://github.com/go-sql-driver/mysql/pulls).
+
+See the [Contribution Guidelines](https://github.com/go-sql-driver/mysql/blob/master/CONTRIBUTING.md) for details.
+
+---------------------------------------
+
+## License
+Go-MySQL-Driver is licensed under the [Mozilla Public License Version 2.0](https://raw.github.com/go-sql-driver/mysql/master/LICENSE)
+
+Mozilla summarizes the license scope as follows:
+> MPL: The copyleft applies to any files containing MPLed code.
+
+
+That means:
+  * You can **use** the **unchanged** source code both in private and commercially.
+  * When distributing, you **must publish** the source code of any **changed files** licensed under the MPL 2.0 under a) the MPL 2.0 itself or b) a compatible license (e.g. GPL 3.0 or Apache License 2.0).
+  * You **needn't publish** the source code of your library as long as the files licensed under the MPL 2.0 are **unchanged**.
+
+Please read the [MPL 2.0 FAQ](https://www.mozilla.org/en-US/MPL/2.0/FAQ/) if you have further questions regarding the license.
+
+You can read the full terms here: [LICENSE](https://raw.github.com/go-sql-driver/mysql/master/LICENSE).
+
+![Go Gopher and MySQL Dolphin](https://raw.github.com/wiki/go-sql-driver/mysql/go-mysql-driver_m.jpg "Golang Gopher transporting the MySQL Dolphin in a wheelbarrow")
+

services/tiktak/vendor/github.com/go-sql-driver/mysql/auth.go

@@ -0,0 +1,422 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2018 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package mysql
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/sha1"
+	"crypto/sha256"
+	"crypto/x509"
+	"encoding/pem"
+	"sync"
+)
+
+// server pub keys registry
+var (
+	serverPubKeyLock     sync.RWMutex
+	serverPubKeyRegistry map[string]*rsa.PublicKey
+)
+
+// RegisterServerPubKey registers a server RSA public key which can be used to
+// send data in a secure manner to the server without receiving the public key
+// in a potentially insecure way from the server first.
+// Registered keys can afterwards be used adding serverPubKey=<name> to the DSN.
+//
+// Note: The provided rsa.PublicKey instance is exclusively owned by the driver
+// after registering it and may not be modified.
+//
+//  data, err := ioutil.ReadFile("mykey.pem")
+//  if err != nil {
+//  	log.Fatal(err)
+//  }
+//
+//  block, _ := pem.Decode(data)
+//  if block == nil || block.Type != "PUBLIC KEY" {
+//  	log.Fatal("failed to decode PEM block containing public key")
+//  }
+//
+//  pub, err := x509.ParsePKIXPublicKey(block.Bytes)
+//  if err != nil {
+//  	log.Fatal(err)
+//  }
+//
+//  if rsaPubKey, ok := pub.(*rsa.PublicKey); ok {
+//  	mysql.RegisterServerPubKey("mykey", rsaPubKey)
+//  } else {
+//  	log.Fatal("not a RSA public key")
+//  }
+//
+func RegisterServerPubKey(name string, pubKey *rsa.PublicKey) {
+	serverPubKeyLock.Lock()
+	if serverPubKeyRegistry == nil {
+		serverPubKeyRegistry = make(map[string]*rsa.PublicKey)
+	}
+
+	serverPubKeyRegistry[name] = pubKey
+	serverPubKeyLock.Unlock()
+}
+
+// DeregisterServerPubKey removes the public key registered with the given name.
+func DeregisterServerPubKey(name string) {
+	serverPubKeyLock.Lock()
+	if serverPubKeyRegistry != nil {
+		delete(serverPubKeyRegistry, name)
+	}
+	serverPubKeyLock.Unlock()
+}
+
+func getServerPubKey(name string) (pubKey *rsa.PublicKey) {
+	serverPubKeyLock.RLock()
+	if v, ok := serverPubKeyRegistry[name]; ok {
+		pubKey = v
+	}
+	serverPubKeyLock.RUnlock()
+	return
+}
+
+// Hash password using pre 4.1 (old password) method
+// https://github.com/atcurtis/mariadb/blob/master/mysys/my_rnd.c
+type myRnd struct {
+	seed1, seed2 uint32
+}
+
+const myRndMaxVal = 0x3FFFFFFF
+
+// Pseudo random number generator
+func newMyRnd(seed1, seed2 uint32) *myRnd {
+	return &myRnd{
+		seed1: seed1 % myRndMaxVal,
+		seed2: seed2 % myRndMaxVal,
+	}
+}
+
+// Tested to be equivalent to MariaDB's floating point variant
+// http://play.golang.org/p/QHvhd4qved
+// http://play.golang.org/p/RG0q4ElWDx
+func (r *myRnd) NextByte() byte {
+	r.seed1 = (r.seed1*3 + r.seed2) % myRndMaxVal
+	r.seed2 = (r.seed1 + r.seed2 + 33) % myRndMaxVal
+
+	return byte(uint64(r.seed1) * 31 / myRndMaxVal)
+}
+
+// Generate binary hash from byte string using insecure pre 4.1 method
+func pwHash(password []byte) (result [2]uint32) {
+	var add uint32 = 7
+	var tmp uint32
+
+	result[0] = 1345345333
+	result[1] = 0x12345671
+
+	for _, c := range password {
+		// skip spaces and tabs in password
+		if c == ' ' || c == '\t' {
+			continue
+		}
+
+		tmp = uint32(c)
+		result[0] ^= (((result[0] & 63) + add) * tmp) + (result[0] << 8)
+		result[1] += (result[1] << 8) ^ result[0]
+		add += tmp
+	}
+
+	// Remove sign bit (1<<31)-1)
+	result[0] &= 0x7FFFFFFF
+	result[1] &= 0x7FFFFFFF
+
+	return
+}
+
+// Hash password using insecure pre 4.1 method
+func scrambleOldPassword(scramble []byte, password string) []byte {
+	if len(password) == 0 {
+		return nil
+	}
+
+	scramble = scramble[:8]
+
+	hashPw := pwHash([]byte(password))
+	hashSc := pwHash(scramble)
+
+	r := newMyRnd(hashPw[0]^hashSc[0], hashPw[1]^hashSc[1])
+
+	var out [8]byte
+	for i := range out {
+		out[i] = r.NextByte() + 64
+	}
+
+	mask := r.NextByte()
+	for i := range out {
+		out[i] ^= mask
+	}
+
+	return out[:]
+}
+
+// Hash password using 4.1+ method (SHA1)
+func scramblePassword(scramble []byte, password string) []byte {
+	if len(password) == 0 {
+		return nil
+	}
+
+	// stage1Hash = SHA1(password)
+	crypt := sha1.New()
+	crypt.Write([]byte(password))
+	stage1 := crypt.Sum(nil)
+
+	// scrambleHash = SHA1(scramble + SHA1(stage1Hash))
+	// inner Hash
+	crypt.Reset()
+	crypt.Write(stage1)
+	hash := crypt.Sum(nil)
+
+	// outer Hash
+	crypt.Reset()
+	crypt.Write(scramble)
+	crypt.Write(hash)
+	scramble = crypt.Sum(nil)
+
+	// token = scrambleHash XOR stage1Hash
+	for i := range scramble {
+		scramble[i] ^= stage1[i]
+	}
+	return scramble
+}
+
+// Hash password using MySQL 8+ method (SHA256)
+func scrambleSHA256Password(scramble []byte, password string) []byte {
+	if len(password) == 0 {
+		return nil
+	}
+
+	// XOR(SHA256(password), SHA256(SHA256(SHA256(password)), scramble))
+
+	crypt := sha256.New()
+	crypt.Write([]byte(password))
+	message1 := crypt.Sum(nil)
+
+	crypt.Reset()
+	crypt.Write(message1)
+	message1Hash := crypt.Sum(nil)
+
+	crypt.Reset()
+	crypt.Write(message1Hash)
+	crypt.Write(scramble)
+	message2 := crypt.Sum(nil)
+
+	for i := range message1 {
+		message1[i] ^= message2[i]
+	}
+
+	return message1
+}
+
+func encryptPassword(password string, seed []byte, pub *rsa.PublicKey) ([]byte, error) {
+	plain := make([]byte, len(password)+1)
+	copy(plain, password)
+	for i := range plain {
+		j := i % len(seed)
+		plain[i] ^= seed[j]
+	}
+	sha1 := sha1.New()
+	return rsa.EncryptOAEP(sha1, rand.Reader, pub, plain, nil)
+}
+
+func (mc *mysqlConn) sendEncryptedPassword(seed []byte, pub *rsa.PublicKey) error {
+	enc, err := encryptPassword(mc.cfg.Passwd, seed, pub)
+	if err != nil {
+		return err
+	}
+	return mc.writeAuthSwitchPacket(enc)
+}
+
+func (mc *mysqlConn) auth(authData []byte, plugin string) ([]byte, error) {
+	switch plugin {
+	case "caching_sha2_password":
+		authResp := scrambleSHA256Password(authData, mc.cfg.Passwd)
+		return authResp, nil
+
+	case "mysql_old_password":
+		if !mc.cfg.AllowOldPasswords {
+			return nil, ErrOldPassword
+		}
+		// Note: there are edge cases where this should work but doesn't;
+		// this is currently "wontfix":
+		// https://github.com/go-sql-driver/mysql/issues/184
+		authResp := append(scrambleOldPassword(authData[:8], mc.cfg.Passwd), 0)
+		return authResp, nil
+
+	case "mysql_clear_password":
+		if !mc.cfg.AllowCleartextPasswords {
+			return nil, ErrCleartextPassword
+		}
+		// http://dev.mysql.com/doc/refman/5.7/en/cleartext-authentication-plugin.html
+		// http://dev.mysql.com/doc/refman/5.7/en/pam-authentication-plugin.html
+		return append([]byte(mc.cfg.Passwd), 0), nil
+
+	case "mysql_native_password":
+		if !mc.cfg.AllowNativePasswords {
+			return nil, ErrNativePassword
+		}
+		// https://dev.mysql.com/doc/internals/en/secure-password-authentication.html
+		// Native password authentication only need and will need 20-byte challenge.
+		authResp := scramblePassword(authData[:20], mc.cfg.Passwd)
+		return authResp, nil
+
+	case "sha256_password":
+		if len(mc.cfg.Passwd) == 0 {
+			return []byte{0}, nil
+		}
+		if mc.cfg.tls != nil || mc.cfg.Net == "unix" {
+			// write cleartext auth packet
+			return append([]byte(mc.cfg.Passwd), 0), nil
+		}
+
+		pubKey := mc.cfg.pubKey
+		if pubKey == nil {
+			// request public key from server
+			return []byte{1}, nil
+		}
+
+		// encrypted password
+		enc, err := encryptPassword(mc.cfg.Passwd, authData, pubKey)
+		return enc, err
+
+	default:
+		errLog.Print("unknown auth plugin:", plugin)
+		return nil, ErrUnknownPlugin
+	}
+}
+
+func (mc *mysqlConn) handleAuthResult(oldAuthData []byte, plugin string) error {
+	// Read Result Packet
+	authData, newPlugin, err := mc.readAuthResult()
+	if err != nil {
+		return err
+	}
+
+	// handle auth plugin switch, if requested
+	if newPlugin != "" {
+		// If CLIENT_PLUGIN_AUTH capability is not supported, no new cipher is
+		// sent and we have to keep using the cipher sent in the init packet.
+		if authData == nil {
+			authData = oldAuthData
+		} else {
+			// copy data from read buffer to owned slice
+			copy(oldAuthData, authData)
+		}
+
+		plugin = newPlugin
+
+		authResp, err := mc.auth(authData, plugin)
+		if err != nil {
+			return err
+		}
+		if err = mc.writeAuthSwitchPacket(authResp); err != nil {
+			return err
+		}
+
+		// Read Result Packet
+		authData, newPlugin, err = mc.readAuthResult()
+		if err != nil {
+			return err
+		}
+
+		// Do not allow to change the auth plugin more than once
+		if newPlugin != "" {
+			return ErrMalformPkt
+		}
+	}
+
+	switch plugin {
+
+	// https://insidemysql.com/preparing-your-community-connector-for-mysql-8-part-2-sha256/
+	case "caching_sha2_password":
+		switch len(authData) {
+		case 0:
+			return nil // auth successful
+		case 1:
+			switch authData[0] {
+			case cachingSha2PasswordFastAuthSuccess:
+				if err = mc.readResultOK(); err == nil {
+					return nil // auth successful
+				}
+
+			case cachingSha2PasswordPerformFullAuthentication:
+				if mc.cfg.tls != nil || mc.cfg.Net == "unix" {
+					// write cleartext auth packet
+					err = mc.writeAuthSwitchPacket(append([]byte(mc.cfg.Passwd), 0))
+					if err != nil {
+						return err
+					}
+				} else {
+					pubKey := mc.cfg.pubKey
+					if pubKey == nil {
+						// request public key from server
+						data, err := mc.buf.takeSmallBuffer(4 + 1)
+						if err != nil {
+							return err
+						}
+						data[4] = cachingSha2PasswordRequestPublicKey
+						mc.writePacket(data)
+
+						// parse public key
+						if data, err = mc.readPacket(); err != nil {
+							return err
+						}
+
+						block, _ := pem.Decode(data[1:])
+						pkix, err := x509.ParsePKIXPublicKey(block.Bytes)
+						if err != nil {
+							return err
+						}
+						pubKey = pkix.(*rsa.PublicKey)
+					}
+
+					// send encrypted password
+					err = mc.sendEncryptedPassword(oldAuthData, pubKey)
+					if err != nil {
+						return err
+					}
+				}
+				return mc.readResultOK()
+
+			default:
+				return ErrMalformPkt
+			}
+		default:
+			return ErrMalformPkt
+		}
+
+	case "sha256_password":
+		switch len(authData) {
+		case 0:
+			return nil // auth successful
+		default:
+			block, _ := pem.Decode(authData)
+			pub, err := x509.ParsePKIXPublicKey(block.Bytes)
+			if err != nil {
+				return err
+			}
+
+			// send encrypted password
+			err = mc.sendEncryptedPassword(oldAuthData, pub.(*rsa.PublicKey))
+			if err != nil {
+				return err
+			}
+			return mc.readResultOK()
+		}
+
+	default:
+		return nil // auth successful
+	}
+
+	return err
+}

services/tiktak/vendor/github.com/go-sql-driver/mysql/buffer.go

@@ -0,0 +1,182 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2013 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package mysql
+
+import (
+	"io"
+	"net"
+	"time"
+)
+
+const defaultBufSize = 4096
+const maxCachedBufSize = 256 * 1024
+
+// A buffer which is used for both reading and writing.
+// This is possible since communication on each connection is synchronous.
+// In other words, we can't write and read simultaneously on the same connection.
+// The buffer is similar to bufio.Reader / Writer but zero-copy-ish
+// Also highly optimized for this particular use case.
+// This buffer is backed by two byte slices in a double-buffering scheme
+type buffer struct {
+	buf     []byte // buf is a byte buffer who's length and capacity are equal.
+	nc      net.Conn
+	idx     int
+	length  int
+	timeout time.Duration
+	dbuf    [2][]byte // dbuf is an array with the two byte slices that back this buffer
+	flipcnt uint      // flipccnt is the current buffer counter for double-buffering
+}
+
+// newBuffer allocates and returns a new buffer.
+func newBuffer(nc net.Conn) buffer {
+	fg := make([]byte, defaultBufSize)
+	return buffer{
+		buf:  fg,
+		nc:   nc,
+		dbuf: [2][]byte{fg, nil},
+	}
+}
+
+// flip replaces the active buffer with the background buffer
+// this is a delayed flip that simply increases the buffer counter;
+// the actual flip will be performed the next time we call `buffer.fill`
+func (b *buffer) flip() {
+	b.flipcnt += 1
+}
+
+// fill reads into the buffer until at least _need_ bytes are in it
+func (b *buffer) fill(need int) error {
+	n := b.length
+	// fill data into its double-buffering target: if we've called
+	// flip on this buffer, we'll be copying to the background buffer,
+	// and then filling it with network data; otherwise we'll just move
+	// the contents of the current buffer to the front before filling it
+	dest := b.dbuf[b.flipcnt&1]
+
+	// grow buffer if necessary to fit the whole packet.
+	if need > len(dest) {
+		// Round up to the next multiple of the default size
+		dest = make([]byte, ((need/defaultBufSize)+1)*defaultBufSize)
+
+		// if the allocated buffer is not too large, move it to backing storage
+		// to prevent extra allocations on applications that perform large reads
+		if len(dest) <= maxCachedBufSize {
+			b.dbuf[b.flipcnt&1] = dest
+		}
+	}
+
+	// if we're filling the fg buffer, move the existing data to the start of it.
+	// if we're filling the bg buffer, copy over the data
+	if n > 0 {
+		copy(dest[:n], b.buf[b.idx:])
+	}
+
+	b.buf = dest
+	b.idx = 0
+
+	for {
+		if b.timeout > 0 {
+			if err := b.nc.SetReadDeadline(time.Now().Add(b.timeout)); err != nil {
+				return err
+			}
+		}
+
+		nn, err := b.nc.Read(b.buf[n:])
+		n += nn
+
+		switch err {
+		case nil:
+			if n < need {
+				continue
+			}
+			b.length = n
+			return nil
+
+		case io.EOF:
+			if n >= need {
+				b.length = n
+				return nil
+			}
+			return io.ErrUnexpectedEOF
+
+		default:
+			return err
+		}
+	}
+}
+
+// returns next N bytes from buffer.
+// The returned slice is only guaranteed to be valid until the next read
+func (b *buffer) readNext(need int) ([]byte, error) {
+	if b.length < need {
+		// refill
+		if err := b.fill(need); err != nil {
+			return nil, err
+		}
+	}
+
+	offset := b.idx
+	b.idx += need
+	b.length -= need
+	return b.buf[offset:b.idx], nil
+}
+
+// takeBuffer returns a buffer with the requested size.
+// If possible, a slice from the existing buffer is returned.
+// Otherwise a bigger buffer is made.
+// Only one buffer (total) can be used at a time.
+func (b *buffer) takeBuffer(length int) ([]byte, error) {
+	if b.length > 0 {
+		return nil, ErrBusyBuffer
+	}
+
+	// test (cheap) general case first
+	if length <= cap(b.buf) {
+		return b.buf[:length], nil
+	}
+
+	if length < maxPacketSize {
+		b.buf = make([]byte, length)
+		return b.buf, nil
+	}
+
+	// buffer is larger than we want to store.
+	return make([]byte, length), nil
+}
+
+// takeSmallBuffer is shortcut which can be used if length is
+// known to be smaller than defaultBufSize.
+// Only one buffer (total) can be used at a time.
+func (b *buffer) takeSmallBuffer(length int) ([]byte, error) {
+	if b.length > 0 {
+		return nil, ErrBusyBuffer
+	}
+	return b.buf[:length], nil
+}
+
+// takeCompleteBuffer returns the complete existing buffer.
+// This can be used if the necessary buffer size is unknown.
+// cap and len of the returned buffer will be equal.
+// Only one buffer (total) can be used at a time.
+func (b *buffer) takeCompleteBuffer() ([]byte, error) {
+	if b.length > 0 {
+		return nil, ErrBusyBuffer
+	}
+	return b.buf, nil
+}
+
+// store stores buf, an updated buffer, if its suitable to do so.
+func (b *buffer) store(buf []byte) error {
+	if b.length > 0 {
+		return ErrBusyBuffer
+	} else if cap(buf) <= maxPacketSize && cap(buf) > cap(b.buf) {
+		b.buf = buf[:cap(buf)]
+	}
+	return nil
+}

services/tiktak/vendor/github.com/go-sql-driver/mysql/collations.go

@@ -0,0 +1,265 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2014 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package mysql
+
+const defaultCollation = "utf8mb4_general_ci"
+const binaryCollation = "binary"
+
+// A list of available collations mapped to the internal ID.
+// To update this map use the following MySQL query:
+//     SELECT COLLATION_NAME, ID FROM information_schema.COLLATIONS WHERE ID<256 ORDER BY ID
+//
+// Handshake packet have only 1 byte for collation_id.  So we can't use collations with ID > 255.
+//
+// ucs2, utf16, and utf32 can't be used for connection charset.
+// https://dev.mysql.com/doc/refman/5.7/en/charset-connection.html#charset-connection-impermissible-client-charset
+// They are commented out to reduce this map.
+var collations = map[string]byte{
+	"big5_chinese_ci":      1,
+	"latin2_czech_cs":      2,
+	"dec8_swedish_ci":      3,
+	"cp850_general_ci":     4,
+	"latin1_german1_ci":    5,
+	"hp8_english_ci":       6,
+	"koi8r_general_ci":     7,
+	"latin1_swedish_ci":    8,
+	"latin2_general_ci":    9,
+	"swe7_swedish_ci":      10,
+	"ascii_general_ci":     11,
+	"ujis_japanese_ci":     12,
+	"sjis_japanese_ci":     13,
+	"cp1251_bulgarian_ci":  14,
+	"latin1_danish_ci":     15,
+	"hebrew_general_ci":    16,
+	"tis620_thai_ci":       18,
+	"euckr_korean_ci":      19,
+	"latin7_estonian_cs":   20,
+	"latin2_hungarian_ci":  21,
+	"koi8u_general_ci":     22,
+	"cp1251_ukrainian_ci":  23,
+	"gb2312_chinese_ci":    24,
+	"greek_general_ci":     25,
+	"cp1250_general_ci":    26,
+	"latin2_croatian_ci":   27,
+	"gbk_chinese_ci":       28,
+	"cp1257_lithuanian_ci": 29,
+	"latin5_turkish_ci":    30,
+	"latin1_german2_ci":    31,
+	"armscii8_general_ci":  32,
+	"utf8_general_ci":      33,
+	"cp1250_czech_cs":      34,
+	//"ucs2_general_ci":          35,
+	"cp866_general_ci":    36,
+	"keybcs2_general_ci":  37,
+	"macce_general_ci":    38,
+	"macroman_general_ci": 39,
+	"cp852_general_ci":    40,
+	"latin7_general_ci":   41,
+	"latin7_general_cs":   42,
+	"macce_bin":           43,
+	"cp1250_croatian_ci":  44,
+	"utf8mb4_general_ci":  45,
+	"utf8mb4_bin":         46,
+	"latin1_bin":          47,
+	"latin1_general_ci":   48,
+	"latin1_general_cs":   49,
+	"cp1251_bin":          50,
+	"cp1251_general_ci":   51,
+	"cp1251_general_cs":   52,
+	"macroman_bin":        53,
+	//"utf16_general_ci":         54,
+	//"utf16_bin":                55,
+	//"utf16le_general_ci":       56,
+	"cp1256_general_ci": 57,
+	"cp1257_bin":        58,
+	"cp1257_general_ci": 59,
+	//"utf32_general_ci":         60,
+	//"utf32_bin":                61,
+	//"utf16le_bin":              62,
+	"binary":          63,
+	"armscii8_bin":    64,
+	"ascii_bin":       65,
+	"cp1250_bin":      66,
+	"cp1256_bin":      67,
+	"cp866_bin":       68,
+	"dec8_bin":        69,
+	"greek_bin":       70,
+	"hebrew_bin":      71,
+	"hp8_bin":         72,
+	"keybcs2_bin":     73,
+	"koi8r_bin":       74,
+	"koi8u_bin":       75,
+	"utf8_tolower_ci": 76,
+	"latin2_bin":      77,
+	"latin5_bin":      78,
+	"latin7_bin":      79,
+	"cp850_bin":       80,
+	"cp852_bin":       81,
+	"swe7_bin":        82,
+	"utf8_bin":        83,
+	"big5_bin":        84,
+	"euckr_bin":       85,
+	"gb2312_bin":      86,
+	"gbk_bin":         87,
+	"sjis_bin":        88,
+	"tis620_bin":      89,
+	//"ucs2_bin":                 90,
+	"ujis_bin":            91,
+	"geostd8_general_ci":  92,
+	"geostd8_bin":         93,
+	"latin1_spanish_ci":   94,
+	"cp932_japanese_ci":   95,
+	"cp932_bin":           96,
+	"eucjpms_japanese_ci": 97,
+	"eucjpms_bin":         98,
+	"cp1250_polish_ci":    99,
+	//"utf16_unicode_ci":         101,
+	//"utf16_icelandic_ci":       102,
+	//"utf16_latvian_ci":         103,
+	//"utf16_romanian_ci":        104,
+	//"utf16_slovenian_ci":       105,
+	//"utf16_polish_ci":          106,
+	//"utf16_estonian_ci":        107,
+	//"utf16_spanish_ci":         108,
+	//"utf16_swedish_ci":         109,
+	//"utf16_turkish_ci":         110,
+	//"utf16_czech_ci":           111,
+	//"utf16_danish_ci":          112,
+	//"utf16_lithuanian_ci":      113,
+	//"utf16_slovak_ci":          114,
+	//"utf16_spanish2_ci":        115,
+	//"utf16_roman_ci":           116,
+	//"utf16_persian_ci":         117,
+	//"utf16_esperanto_ci":       118,
+	//"utf16_hungarian_ci":       119,
+	//"utf16_sinhala_ci":         120,
+	//"utf16_german2_ci":         121,
+	//"utf16_croatian_ci":        122,
+	//"utf16_unicode_520_ci":     123,
+	//"utf16_vietnamese_ci":      124,
+	//"ucs2_unicode_ci":          128,
+	//"ucs2_icelandic_ci":        129,
+	//"ucs2_latvian_ci":          130,
+	//"ucs2_romanian_ci":         131,
+	//"ucs2_slovenian_ci":        132,
+	//"ucs2_polish_ci":           133,
+	//"ucs2_estonian_ci":         134,
+	//"ucs2_spanish_ci":          135,
+	//"ucs2_swedish_ci":          136,
+	//"ucs2_turkish_ci":          137,
+	//"ucs2_czech_ci":            138,
+	//"ucs2_danish_ci":           139,
+	//"ucs2_lithuanian_ci":       140,
+	//"ucs2_slovak_ci":           141,
+	//"ucs2_spanish2_ci":         142,
+	//"ucs2_roman_ci":            143,
+	//"ucs2_persian_ci":          144,
+	//"ucs2_esperanto_ci":        145,
+	//"ucs2_hungarian_ci":        146,
+	//"ucs2_sinhala_ci":          147,
+	//"ucs2_german2_ci":          148,
+	//"ucs2_croatian_ci":         149,
+	//"ucs2_unicode_520_ci":      150,
+	//"ucs2_vietnamese_ci":       151,
+	//"ucs2_general_mysql500_ci": 159,
+	//"utf32_unicode_ci":         160,
+	//"utf32_icelandic_ci":       161,
+	//"utf32_latvian_ci":         162,
+	//"utf32_romanian_ci":        163,
+	//"utf32_slovenian_ci":       164,
+	//"utf32_polish_ci":          165,
+	//"utf32_estonian_ci":        166,
+	//"utf32_spanish_ci":         167,
+	//"utf32_swedish_ci":         168,
+	//"utf32_turkish_ci":         169,
+	//"utf32_czech_ci":           170,
+	//"utf32_danish_ci":          171,
+	//"utf32_lithuanian_ci":      172,
+	//"utf32_slovak_ci":          173,
+	//"utf32_spanish2_ci":        174,
+	//"utf32_roman_ci":           175,
+	//"utf32_persian_ci":         176,
+	//"utf32_esperanto_ci":       177,
+	//"utf32_hungarian_ci":       178,
+	//"utf32_sinhala_ci":         179,
+	//"utf32_german2_ci":         180,
+	//"utf32_croatian_ci":        181,
+	//"utf32_unicode_520_ci":     182,
+	//"utf32_vietnamese_ci":      183,
+	"utf8_unicode_ci":          192,
+	"utf8_icelandic_ci":        193,
+	"utf8_latvian_ci":          194,
+	"utf8_romanian_ci":         195,
+	"utf8_slovenian_ci":        196,
+	"utf8_polish_ci":           197,
+	"utf8_estonian_ci":         198,
+	"utf8_spanish_ci":          199,
+	"utf8_swedish_ci":          200,
+	"utf8_turkish_ci":          201,
+	"utf8_czech_ci":            202,
+	"utf8_danish_ci":           203,
+	"utf8_lithuanian_ci":       204,
+	"utf8_slovak_ci":           205,
+	"utf8_spanish2_ci":         206,
+	"utf8_roman_ci":            207,
+	"utf8_persian_ci":          208,
+	"utf8_esperanto_ci":        209,
+	"utf8_hungarian_ci":        210,
+	"utf8_sinhala_ci":          211,
+	"utf8_german2_ci":          212,
+	"utf8_croatian_ci":         213,
+	"utf8_unicode_520_ci":      214,
+	"utf8_vietnamese_ci":       215,
+	"utf8_general_mysql500_ci": 223,
+	"utf8mb4_unicode_ci":       224,
+	"utf8mb4_icelandic_ci":     225,
+	"utf8mb4_latvian_ci":       226,
+	"utf8mb4_romanian_ci":      227,
+	"utf8mb4_slovenian_ci":     228,
+	"utf8mb4_polish_ci":        229,
+	"utf8mb4_estonian_ci":      230,
+	"utf8mb4_spanish_ci":       231,
+	"utf8mb4_swedish_ci":       232,
+	"utf8mb4_turkish_ci":       233,
+	"utf8mb4_czech_ci":         234,
+	"utf8mb4_danish_ci":        235,
+	"utf8mb4_lithuanian_ci":    236,
+	"utf8mb4_slovak_ci":        237,
+	"utf8mb4_spanish2_ci":      238,
+	"utf8mb4_roman_ci":         239,
+	"utf8mb4_persian_ci":       240,
+	"utf8mb4_esperanto_ci":     241,
+	"utf8mb4_hungarian_ci":     242,
+	"utf8mb4_sinhala_ci":       243,
+	"utf8mb4_german2_ci":       244,
+	"utf8mb4_croatian_ci":      245,
+	"utf8mb4_unicode_520_ci":   246,
+	"utf8mb4_vietnamese_ci":    247,
+	"gb18030_chinese_ci":       248,
+	"gb18030_bin":              249,
+	"gb18030_unicode_520_ci":   250,
+	"utf8mb4_0900_ai_ci":       255,
+}
+
+// A blacklist of collations which is unsafe to interpolate parameters.
+// These multibyte encodings may contains 0x5c (`\`) in their trailing bytes.
+var unsafeCollations = map[string]bool{
+	"big5_chinese_ci":        true,
+	"sjis_japanese_ci":       true,
+	"gbk_chinese_ci":         true,
+	"big5_bin":               true,
+	"gb2312_bin":             true,
+	"gbk_bin":                true,
+	"sjis_bin":               true,
+	"cp932_japanese_ci":      true,
+	"cp932_bin":              true,
+	"gb18030_chinese_ci":     true,
+	"gb18030_bin":            true,
+	"gb18030_unicode_520_ci": true,
+}

services/tiktak/vendor/github.com/go-sql-driver/mysql/conncheck.go

@@ -0,0 +1,54 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2019 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+// +build linux darwin dragonfly freebsd netbsd openbsd solaris illumos
+
+package mysql
+
+import (
+	"errors"
+	"io"
+	"net"
+	"syscall"
+)
+
+var errUnexpectedRead = errors.New("unexpected read from socket")
+
+func connCheck(conn net.Conn) error {
+	var sysErr error
+
+	sysConn, ok := conn.(syscall.Conn)
+	if !ok {
+		return nil
+	}
+	rawConn, err := sysConn.SyscallConn()
+	if err != nil {
+		return err
+	}
+
+	err = rawConn.Read(func(fd uintptr) bool {
+		var buf [1]byte
+		n, err := syscall.Read(int(fd), buf[:])
+		switch {
+		case n == 0 && err == nil:
+			sysErr = io.EOF
+		case n > 0:
+			sysErr = errUnexpectedRead
+		case err == syscall.EAGAIN || err == syscall.EWOULDBLOCK:
+			sysErr = nil
+		default:
+			sysErr = err
+		}
+		return true
+	})
+	if err != nil {
+		return err
+	}
+
+	return sysErr
+}

services/tiktak/vendor/github.com/go-sql-driver/mysql/conncheck_dummy.go

@@ -0,0 +1,17 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2019 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+// +build !linux,!darwin,!dragonfly,!freebsd,!netbsd,!openbsd,!solaris,!illumos
+
+package mysql
+
+import "net"
+
+func connCheck(conn net.Conn) error {
+	return nil
+}

services/tiktak/vendor/github.com/go-sql-driver/mysql/connection.go

@@ -0,0 +1,651 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package mysql
+
+import (
+	"context"
+	"database/sql"
+	"database/sql/driver"
+	"io"
+	"net"
+	"strconv"
+	"strings"
+	"time"
+)
+
+type mysqlConn struct {
+	buf              buffer
+	netConn          net.Conn
+	rawConn          net.Conn // underlying connection when netConn is TLS connection.
+	affectedRows     uint64
+	insertId         uint64
+	cfg              *Config
+	maxAllowedPacket int
+	maxWriteSize     int
+	writeTimeout     time.Duration
+	flags            clientFlag
+	status           statusFlag
+	sequence         uint8
+	parseTime        bool
+	reset            bool // set when the Go SQL package calls ResetSession
+
+	// for context support (Go 1.8+)
+	watching bool
+	watcher  chan<- context.Context
+	closech  chan struct{}
+	finished chan<- struct{}
+	canceled atomicError // set non-nil if conn is canceled
+	closed   atomicBool  // set when conn is closed, before closech is closed
+}
+
+// Handles parameters set in DSN after the connection is established
+func (mc *mysqlConn) handleParams() (err error) {
+	for param, val := range mc.cfg.Params {
+		switch param {
+		// Charset
+		case "charset":
+			charsets := strings.Split(val, ",")
+			for i := range charsets {
+				// ignore errors here - a charset may not exist
+				err = mc.exec("SET NAMES " + charsets[i])
+				if err == nil {
+					break
+				}
+			}
+			if err != nil {
+				return
+			}
+
+		// System Vars
+		default:
+			err = mc.exec("SET " + param + "=" + val + "")
+			if err != nil {
+				return
+			}
+		}
+	}
+
+	return
+}
+
+func (mc *mysqlConn) markBadConn(err error) error {
+	if mc == nil {
+		return err
+	}
+	if err != errBadConnNoWrite {
+		return err
+	}
+	return driver.ErrBadConn
+}
+
+func (mc *mysqlConn) Begin() (driver.Tx, error) {
+	return mc.begin(false)
+}
+
+func (mc *mysqlConn) begin(readOnly bool) (driver.Tx, error) {
+	if mc.closed.IsSet() {
+		errLog.Print(ErrInvalidConn)
+		return nil, driver.ErrBadConn
+	}
+	var q string
+	if readOnly {
+		q = "START TRANSACTION READ ONLY"
+	} else {
+		q = "START TRANSACTION"
+	}
+	err := mc.exec(q)
+	if err == nil {
+		return &mysqlTx{mc}, err
+	}
+	return nil, mc.markBadConn(err)
+}
+
+func (mc *mysqlConn) Close() (err error) {
+	// Makes Close idempotent
+	if !mc.closed.IsSet() {
+		err = mc.writeCommandPacket(comQuit)
+	}
+
+	mc.cleanup()
+
+	return
+}
+
+// Closes the network connection and unsets internal variables. Do not call this
+// function after successfully authentication, call Close instead. This function
+// is called before auth or on auth failure because MySQL will have already
+// closed the network connection.
+func (mc *mysqlConn) cleanup() {
+	if !mc.closed.TrySet(true) {
+		return
+	}
+
+	// Makes cleanup idempotent
+	close(mc.closech)
+	if mc.netConn == nil {
+		return
+	}
+	if err := mc.netConn.Close(); err != nil {
+		errLog.Print(err)
+	}
+}
+
+func (mc *mysqlConn) error() error {
+	if mc.closed.IsSet() {
+		if err := mc.canceled.Value(); err != nil {
+			return err
+		}
+		return ErrInvalidConn
+	}
+	return nil
+}
+
+func (mc *mysqlConn) Prepare(query string) (driver.Stmt, error) {
+	if mc.closed.IsSet() {
+		errLog.Print(ErrInvalidConn)
+		return nil, driver.ErrBadConn
+	}
+	// Send command
+	err := mc.writeCommandPacketStr(comStmtPrepare, query)
+	if err != nil {
+		// STMT_PREPARE is safe to retry.  So we can return ErrBadConn here.
+		errLog.Print(err)
+		return nil, driver.ErrBadConn
+	}
+
+	stmt := &mysqlStmt{
+		mc: mc,
+	}
+
+	// Read Result
+	columnCount, err := stmt.readPrepareResultPacket()
+	if err == nil {
+		if stmt.paramCount > 0 {
+			if err = mc.readUntilEOF(); err != nil {
+				return nil, err
+			}
+		}
+
+		if columnCount > 0 {
+			err = mc.readUntilEOF()
+		}
+	}
+
+	return stmt, err
+}
+
+func (mc *mysqlConn) interpolateParams(query string, args []driver.Value) (string, error) {
+	// Number of ? should be same to len(args)
+	if strings.Count(query, "?") != len(args) {
+		return "", driver.ErrSkip
+	}
+
+	buf, err := mc.buf.takeCompleteBuffer()
+	if err != nil {
+		// can not take the buffer. Something must be wrong with the connection
+		errLog.Print(err)
+		return "", ErrInvalidConn
+	}
+	buf = buf[:0]
+	argPos := 0
+
+	for i := 0; i < len(query); i++ {
+		q := strings.IndexByte(query[i:], '?')
+		if q == -1 {
+			buf = append(buf, query[i:]...)
+			break
+		}
+		buf = append(buf, query[i:i+q]...)
+		i += q
+
+		arg := args[argPos]
+		argPos++
+
+		if arg == nil {
+			buf = append(buf, "NULL"...)
+			continue
+		}
+
+		switch v := arg.(type) {
+		case int64:
+			buf = strconv.AppendInt(buf, v, 10)
+		case uint64:
+			// Handle uint64 explicitly because our custom ConvertValue emits unsigned values
+			buf = strconv.AppendUint(buf, v, 10)
+		case float64:
+			buf = strconv.AppendFloat(buf, v, 'g', -1, 64)
+		case bool:
+			if v {
+				buf = append(buf, '1')
+			} else {
+				buf = append(buf, '0')
+			}
+		case time.Time:
+			if v.IsZero() {
+				buf = append(buf, "'0000-00-00'"...)
+			} else {
+				v := v.In(mc.cfg.Loc)
+				v = v.Add(time.Nanosecond * 500) // To round under microsecond
+				year := v.Year()
+				year100 := year / 100
+				year1 := year % 100
+				month := v.Month()
+				day := v.Day()
+				hour := v.Hour()
+				minute := v.Minute()
+				second := v.Second()
+				micro := v.Nanosecond() / 1000
+
+				buf = append(buf, []byte{
+					'\'',
+					digits10[year100], digits01[year100],
+					digits10[year1], digits01[year1],
+					'-',
+					digits10[month], digits01[month],
+					'-',
+					digits10[day], digits01[day],
+					' ',
+					digits10[hour], digits01[hour],
+					':',
+					digits10[minute], digits01[minute],
+					':',
+					digits10[second], digits01[second],
+				}...)
+
+				if micro != 0 {
+					micro10000 := micro / 10000
+					micro100 := micro / 100 % 100
+					micro1 := micro % 100
+					buf = append(buf, []byte{
+						'.',
+						digits10[micro10000], digits01[micro10000],
+						digits10[micro100], digits01[micro100],
+						digits10[micro1], digits01[micro1],
+					}...)
+				}
+				buf = append(buf, '\'')
+			}
+		case []byte:
+			if v == nil {
+				buf = append(buf, "NULL"...)
+			} else {
+				buf = append(buf, "_binary'"...)
+				if mc.status&statusNoBackslashEscapes == 0 {
+					buf = escapeBytesBackslash(buf, v)
+				} else {
+					buf = escapeBytesQuotes(buf, v)
+				}
+				buf = append(buf, '\'')
+			}
+		case string:
+			buf = append(buf, '\'')
+			if mc.status&statusNoBackslashEscapes == 0 {
+				buf = escapeStringBackslash(buf, v)
+			} else {
+				buf = escapeStringQuotes(buf, v)
+			}
+			buf = append(buf, '\'')
+		default:
+			return "", driver.ErrSkip
+		}
+
+		if len(buf)+4 > mc.maxAllowedPacket {
+			return "", driver.ErrSkip
+		}
+	}
+	if argPos != len(args) {
+		return "", driver.ErrSkip
+	}
+	return string(buf), nil
+}
+
+func (mc *mysqlConn) Exec(query string, args []driver.Value) (driver.Result, error) {
+	if mc.closed.IsSet() {
+		errLog.Print(ErrInvalidConn)
+		return nil, driver.ErrBadConn
+	}
+	if len(args) != 0 {
+		if !mc.cfg.InterpolateParams {
+			return nil, driver.ErrSkip
+		}
+		// try to interpolate the parameters to save extra roundtrips for preparing and closing a statement
+		prepared, err := mc.interpolateParams(query, args)
+		if err != nil {
+			return nil, err
+		}
+		query = prepared
+	}
+	mc.affectedRows = 0
+	mc.insertId = 0
+
+	err := mc.exec(query)
+	if err == nil {
+		return &mysqlResult{
+			affectedRows: int64(mc.affectedRows),
+			insertId:     int64(mc.insertId),
+		}, err
+	}
+	return nil, mc.markBadConn(err)
+}
+
+// Internal function to execute commands
+func (mc *mysqlConn) exec(query string) error {
+	// Send command
+	if err := mc.writeCommandPacketStr(comQuery, query); err != nil {
+		return mc.markBadConn(err)
+	}
+
+	// Read Result
+	resLen, err := mc.readResultSetHeaderPacket()
+	if err != nil {
+		return err
+	}
+
+	if resLen > 0 {
+		// columns
+		if err := mc.readUntilEOF(); err != nil {
+			return err
+		}
+
+		// rows
+		if err := mc.readUntilEOF(); err != nil {
+			return err
+		}
+	}
+
+	return mc.discardResults()
+}
+
+func (mc *mysqlConn) Query(query string, args []driver.Value) (driver.Rows, error) {
+	return mc.query(query, args)
+}
+
+func (mc *mysqlConn) query(query string, args []driver.Value) (*textRows, error) {
+	if mc.closed.IsSet() {
+		errLog.Print(ErrInvalidConn)
+		return nil, driver.ErrBadConn
+	}
+	if len(args) != 0 {
+		if !mc.cfg.InterpolateParams {
+			return nil, driver.ErrSkip
+		}
+		// try client-side prepare to reduce roundtrip
+		prepared, err := mc.interpolateParams(query, args)
+		if err != nil {
+			return nil, err
+		}
+		query = prepared
+	}
+	// Send command
+	err := mc.writeCommandPacketStr(comQuery, query)
+	if err == nil {
+		// Read Result
+		var resLen int
+		resLen, err = mc.readResultSetHeaderPacket()
+		if err == nil {
+			rows := new(textRows)
+			rows.mc = mc
+
+			if resLen == 0 {
+				rows.rs.done = true
+
+				switch err := rows.NextResultSet(); err {
+				case nil, io.EOF:
+					return rows, nil
+				default:
+					return nil, err
+				}
+			}
+
+			// Columns
+			rows.rs.columns, err = mc.readColumns(resLen)
+			return rows, err
+		}
+	}
+	return nil, mc.markBadConn(err)
+}
+
+// Gets the value of the given MySQL System Variable
+// The returned byte slice is only valid until the next read
+func (mc *mysqlConn) getSystemVar(name string) ([]byte, error) {
+	// Send command
+	if err := mc.writeCommandPacketStr(comQuery, "SELECT @@"+name); err != nil {
+		return nil, err
+	}
+
+	// Read Result
+	resLen, err := mc.readResultSetHeaderPacket()
+	if err == nil {
+		rows := new(textRows)
+		rows.mc = mc
+		rows.rs.columns = []mysqlField{{fieldType: fieldTypeVarChar}}
+
+		if resLen > 0 {
+			// Columns
+			if err := mc.readUntilEOF(); err != nil {
+				return nil, err
+			}
+		}
+
+		dest := make([]driver.Value, resLen)
+		if err = rows.readRow(dest); err == nil {
+			return dest[0].([]byte), mc.readUntilEOF()
+		}
+	}
+	return nil, err
+}
+
+// finish is called when the query has canceled.
+func (mc *mysqlConn) cancel(err error) {
+	mc.canceled.Set(err)
+	mc.cleanup()
+}
+
+// finish is called when the query has succeeded.
+func (mc *mysqlConn) finish() {
+	if !mc.watching || mc.finished == nil {
+		return
+	}
+	select {
+	case mc.finished <- struct{}{}:
+		mc.watching = false
+	case <-mc.closech:
+	}
+}
+
+// Ping implements driver.Pinger interface
+func (mc *mysqlConn) Ping(ctx context.Context) (err error) {
+	if mc.closed.IsSet() {
+		errLog.Print(ErrInvalidConn)
+		return driver.ErrBadConn
+	}
+
+	if err = mc.watchCancel(ctx); err != nil {
+		return
+	}
+	defer mc.finish()
+
+	if err = mc.writeCommandPacket(comPing); err != nil {
+		return mc.markBadConn(err)
+	}
+
+	return mc.readResultOK()
+}
+
+// BeginTx implements driver.ConnBeginTx interface
+func (mc *mysqlConn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) {
+	if err := mc.watchCancel(ctx); err != nil {
+		return nil, err
+	}
+	defer mc.finish()
+
+	if sql.IsolationLevel(opts.Isolation) != sql.LevelDefault {
+		level, err := mapIsolationLevel(opts.Isolation)
+		if err != nil {
+			return nil, err
+		}
+		err = mc.exec("SET TRANSACTION ISOLATION LEVEL " + level)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return mc.begin(opts.ReadOnly)
+}
+
+func (mc *mysqlConn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Rows, error) {
+	dargs, err := namedValueToValue(args)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := mc.watchCancel(ctx); err != nil {
+		return nil, err
+	}
+
+	rows, err := mc.query(query, dargs)
+	if err != nil {
+		mc.finish()
+		return nil, err
+	}
+	rows.finish = mc.finish
+	return rows, err
+}
+
+func (mc *mysqlConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Result, error) {
+	dargs, err := namedValueToValue(args)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := mc.watchCancel(ctx); err != nil {
+		return nil, err
+	}
+	defer mc.finish()
+
+	return mc.Exec(query, dargs)
+}
+
+func (mc *mysqlConn) PrepareContext(ctx context.Context, query string) (driver.Stmt, error) {
+	if err := mc.watchCancel(ctx); err != nil {
+		return nil, err
+	}
+
+	stmt, err := mc.Prepare(query)
+	mc.finish()
+	if err != nil {
+		return nil, err
+	}
+
+	select {
+	default:
+	case <-ctx.Done():
+		stmt.Close()
+		return nil, ctx.Err()
+	}
+	return stmt, nil
+}
+
+func (stmt *mysqlStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (driver.Rows, error) {
+	dargs, err := namedValueToValue(args)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := stmt.mc.watchCancel(ctx); err != nil {
+		return nil, err
+	}
+
+	rows, err := stmt.query(dargs)
+	if err != nil {
+		stmt.mc.finish()
+		return nil, err
+	}
+	rows.finish = stmt.mc.finish
+	return rows, err
+}
+
+func (stmt *mysqlStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (driver.Result, error) {
+	dargs, err := namedValueToValue(args)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := stmt.mc.watchCancel(ctx); err != nil {
+		return nil, err
+	}
+	defer stmt.mc.finish()
+
+	return stmt.Exec(dargs)
+}
+
+func (mc *mysqlConn) watchCancel(ctx context.Context) error {
+	if mc.watching {
+		// Reach here if canceled,
+		// so the connection is already invalid
+		mc.cleanup()
+		return nil
+	}
+	// When ctx is already cancelled, don't watch it.
+	if err := ctx.Err(); err != nil {
+		return err
+	}
+	// When ctx is not cancellable, don't watch it.
+	if ctx.Done() == nil {
+		return nil
+	}
+	// When watcher is not alive, can't watch it.
+	if mc.watcher == nil {
+		return nil
+	}
+
+	mc.watching = true
+	mc.watcher <- ctx
+	return nil
+}
+
+func (mc *mysqlConn) startWatcher() {
+	watcher := make(chan context.Context, 1)
+	mc.watcher = watcher
+	finished := make(chan struct{})
+	mc.finished = finished
+	go func() {
+		for {
+			var ctx context.Context
+			select {
+			case ctx = <-watcher:
+			case <-mc.closech:
+				return
+			}
+
+			select {
+			case <-ctx.Done():
+				mc.cancel(ctx.Err())
+			case <-finished:
+			case <-mc.closech:
+				return
+			}
+		}
+	}()
+}
+
+func (mc *mysqlConn) CheckNamedValue(nv *driver.NamedValue) (err error) {
+	nv.Value, err = converter{}.ConvertValue(nv.Value)
+	return
+}
+
+// ResetSession implements driver.SessionResetter.
+// (From Go 1.10)
+func (mc *mysqlConn) ResetSession(ctx context.Context) error {
+	if mc.closed.IsSet() {
+		return driver.ErrBadConn
+	}
+	mc.reset = true
+	return nil
+}

services/tiktak/vendor/github.com/go-sql-driver/mysql/connector.go

@@ -0,0 +1,146 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2018 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package mysql
+
+import (
+	"context"
+	"database/sql/driver"
+	"net"
+)
+
+type connector struct {
+	cfg *Config // immutable private copy.
+}
+
+// Connect implements driver.Connector interface.
+// Connect returns a connection to the database.
+func (c *connector) Connect(ctx context.Context) (driver.Conn, error) {
+	var err error
+
+	// New mysqlConn
+	mc := &mysqlConn{
+		maxAllowedPacket: maxPacketSize,
+		maxWriteSize:     maxPacketSize - 1,
+		closech:          make(chan struct{}),
+		cfg:              c.cfg,
+	}
+	mc.parseTime = mc.cfg.ParseTime
+
+	// Connect to Server
+	dialsLock.RLock()
+	dial, ok := dials[mc.cfg.Net]
+	dialsLock.RUnlock()
+	if ok {
+		dctx := ctx
+		if mc.cfg.Timeout > 0 {
+			var cancel context.CancelFunc
+			dctx, cancel = context.WithTimeout(ctx, c.cfg.Timeout)
+			defer cancel()
+		}
+		mc.netConn, err = dial(dctx, mc.cfg.Addr)
+	} else {
+		nd := net.Dialer{Timeout: mc.cfg.Timeout}
+		mc.netConn, err = nd.DialContext(ctx, mc.cfg.Net, mc.cfg.Addr)
+	}
+
+	if err != nil {
+		return nil, err
+	}
+
+	// Enable TCP Keepalives on TCP connections
+	if tc, ok := mc.netConn.(*net.TCPConn); ok {
+		if err := tc.SetKeepAlive(true); err != nil {
+			// Don't send COM_QUIT before handshake.
+			mc.netConn.Close()
+			mc.netConn = nil
+			return nil, err
+		}
+	}
+
+	// Call startWatcher for context support (From Go 1.8)
+	mc.startWatcher()
+	if err := mc.watchCancel(ctx); err != nil {
+		mc.cleanup()
+		return nil, err
+	}
+	defer mc.finish()
+
+	mc.buf = newBuffer(mc.netConn)
+
+	// Set I/O timeouts
+	mc.buf.timeout = mc.cfg.ReadTimeout
+	mc.writeTimeout = mc.cfg.WriteTimeout
+
+	// Reading Handshake Initialization Packet
+	authData, plugin, err := mc.readHandshakePacket()
+	if err != nil {
+		mc.cleanup()
+		return nil, err
+	}
+
+	if plugin == "" {
+		plugin = defaultAuthPlugin
+	}
+
+	// Send Client Authentication Packet
+	authResp, err := mc.auth(authData, plugin)
+	if err != nil {
+		// try the default auth plugin, if using the requested plugin failed
+		errLog.Print("could not use requested auth plugin '"+plugin+"': ", err.Error())
+		plugin = defaultAuthPlugin
+		authResp, err = mc.auth(authData, plugin)
+		if err != nil {
+			mc.cleanup()
+			return nil, err
+		}
+	}
+	if err = mc.writeHandshakeResponsePacket(authResp, plugin); err != nil {
+		mc.cleanup()
+		return nil, err
+	}
+
+	// Handle response to auth packet, switch methods if possible
+	if err = mc.handleAuthResult(authData, plugin); err != nil {
+		// Authentication failed and MySQL has already closed the connection
+		// (https://dev.mysql.com/doc/internals/en/authentication-fails.html).
+		// Do not send COM_QUIT, just cleanup and return the error.
+		mc.cleanup()
+		return nil, err
+	}
+
+	if mc.cfg.MaxAllowedPacket > 0 {
+		mc.maxAllowedPacket = mc.cfg.MaxAllowedPacket
+	} else {
+		// Get max allowed packet size
+		maxap, err := mc.getSystemVar("max_allowed_packet")
+		if err != nil {
+			mc.Close()
+			return nil, err
+		}
+		mc.maxAllowedPacket = stringToInt(maxap) - 1
+	}
+	if mc.maxAllowedPacket < maxPacketSize {
+		mc.maxWriteSize = mc.maxAllowedPacket
+	}
+
+	// Handle DSN Params
+	err = mc.handleParams()
+	if err != nil {
+		mc.Close()
+		return nil, err
+	}
+
+	return mc, nil
+}
+
+// Driver implements driver.Connector interface.
+// Driver returns &MySQLDriver{}.
+func (c *connector) Driver() driver.Driver {
+	return &MySQLDriver{}
+}

services/tiktak/vendor/github.com/go-sql-driver/mysql/const.go

@@ -0,0 +1,174 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package mysql
+
+const (
+	defaultAuthPlugin       = "mysql_native_password"
+	defaultMaxAllowedPacket = 4 << 20 // 4 MiB
+	minProtocolVersion      = 10
+	maxPacketSize           = 1<<24 - 1
+	timeFormat              = "2006-01-02 15:04:05.999999"
+)
+
+// MySQL constants documentation:
+// http://dev.mysql.com/doc/internals/en/client-server-protocol.html
+
+const (
+	iOK           byte = 0x00
+	iAuthMoreData byte = 0x01
+	iLocalInFile  byte = 0xfb
+	iEOF          byte = 0xfe
+	iERR          byte = 0xff
+)
+
+// https://dev.mysql.com/doc/internals/en/capability-flags.html#packet-Protocol::CapabilityFlags
+type clientFlag uint32
+
+const (
+	clientLongPassword clientFlag = 1 << iota
+	clientFoundRows
+	clientLongFlag
+	clientConnectWithDB
+	clientNoSchema
+	clientCompress
+	clientODBC
+	clientLocalFiles
+	clientIgnoreSpace
+	clientProtocol41
+	clientInteractive
+	clientSSL
+	clientIgnoreSIGPIPE
+	clientTransactions
+	clientReserved
+	clientSecureConn
+	clientMultiStatements
+	clientMultiResults
+	clientPSMultiResults
+	clientPluginAuth
+	clientConnectAttrs
+	clientPluginAuthLenEncClientData
+	clientCanHandleExpiredPasswords
+	clientSessionTrack
+	clientDeprecateEOF
+)
+
+const (
+	comQuit byte = iota + 1
+	comInitDB
+	comQuery
+	comFieldList
+	comCreateDB
+	comDropDB
+	comRefresh
+	comShutdown
+	comStatistics
+	comProcessInfo
+	comConnect
+	comProcessKill
+	comDebug
+	comPing
+	comTime
+	comDelayedInsert
+	comChangeUser
+	comBinlogDump
+	comTableDump
+	comConnectOut
+	comRegisterSlave
+	comStmtPrepare
+	comStmtExecute
+	comStmtSendLongData
+	comStmtClose
+	comStmtReset
+	comSetOption
+	comStmtFetch
+)
+
+// https://dev.mysql.com/doc/internals/en/com-query-response.html#packet-Protocol::ColumnType
+type fieldType byte
+
+const (
+	fieldTypeDecimal fieldType = iota
+	fieldTypeTiny
+	fieldTypeShort
+	fieldTypeLong
+	fieldTypeFloat
+	fieldTypeDouble
+	fieldTypeNULL
+	fieldTypeTimestamp
+	fieldTypeLongLong
+	fieldTypeInt24
+	fieldTypeDate
+	fieldTypeTime
+	fieldTypeDateTime
+	fieldTypeYear
+	fieldTypeNewDate
+	fieldTypeVarChar
+	fieldTypeBit
+)
+const (
+	fieldTypeJSON fieldType = iota + 0xf5
+	fieldTypeNewDecimal
+	fieldTypeEnum
+	fieldTypeSet
+	fieldTypeTinyBLOB
+	fieldTypeMediumBLOB
+	fieldTypeLongBLOB
+	fieldTypeBLOB
+	fieldTypeVarString
+	fieldTypeString
+	fieldTypeGeometry
+)
+
+type fieldFlag uint16
+
+const (
+	flagNotNULL fieldFlag = 1 << iota
+	flagPriKey
+	flagUniqueKey
+	flagMultipleKey
+	flagBLOB
+	flagUnsigned
+	flagZeroFill
+	flagBinary
+	flagEnum
+	flagAutoIncrement
+	flagTimestamp
+	flagSet
+	flagUnknown1
+	flagUnknown2
+	flagUnknown3
+	flagUnknown4
+)
+
+// http://dev.mysql.com/doc/internals/en/status-flags.html
+type statusFlag uint16
+
+const (
+	statusInTrans statusFlag = 1 << iota
+	statusInAutocommit
+	statusReserved // Not in documentation
+	statusMoreResultsExists
+	statusNoGoodIndexUsed
+	statusNoIndexUsed
+	statusCursorExists
+	statusLastRowSent
+	statusDbDropped
+	statusNoBackslashEscapes
+	statusMetadataChanged
+	statusQueryWasSlow
+	statusPsOutParams
+	statusInTransReadonly
+	statusSessionStateChanged
+)
+
+const (
+	cachingSha2PasswordRequestPublicKey          = 2
+	cachingSha2PasswordFastAuthSuccess           = 3
+	cachingSha2PasswordPerformFullAuthentication = 4
+)

services/tiktak/vendor/github.com/go-sql-driver/mysql/driver.go

@@ -0,0 +1,107 @@
+// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+// Package mysql provides a MySQL driver for Go's database/sql package.
+//
+// The driver should be used via the database/sql package:
+//
+//  import "database/sql"
+//  import _ "github.com/go-sql-driver/mysql"
+//
+//  db, err := sql.Open("mysql", "user:password@/dbname")
+//
+// See https://github.com/go-sql-driver/mysql#usage for details
+package mysql
+
+import (
+	"context"
+	"database/sql"
+	"database/sql/driver"
+	"net"
+	"sync"
+)
+
+// MySQLDriver is exported to make the driver directly accessible.
+// In general the driver is used via the database/sql package.
+type MySQLDriver struct{}
+
+// DialFunc is a function which can be used to establish the network connection.
+// Custom dial functions must be registered with RegisterDial
+//
+// Deprecated: users should register a DialContextFunc instead
+type DialFunc func(addr string) (net.Conn, error)
+
+// DialContextFunc is a function which can be used to establish the network connection.
+// Custom dial functions must be registered with RegisterDialContext
+type DialContextFunc func(ctx context.Context, addr string) (net.Conn, error)
+
+var (
+	dialsLock sync.RWMutex
+	dials     map[string]DialContextFunc
+)
+
+// RegisterDialContext registers a custom dial function. It can then be used by the
+// network address mynet(addr), where mynet is the registered new network.
+// The current context for the connection and its address is passed to the dial function.
+func RegisterDialContext(net string, dial DialContextFunc) {
+	dialsLock.Lock()
+	defer dialsLock.Unlock()
+	if dials == nil {
+		dials = make(map[string]DialContextFunc)
+	}
+	dials[net] = dial
+}
+
+// RegisterDial registers a custom dial function. It can then be used by the
+// network address mynet(addr), where mynet is the registered new network.
+// addr is passed as a parameter to the dial function.
+//
+// Deprecated: users should call RegisterDialContext instead
+func RegisterDial(network string, dial DialFunc) {
+	RegisterDialContext(network, func(_ context.Context, addr string) (net.Conn, error) {
+		return dial(addr)
+	})
+}
+
+// Open new Connection.
+// See https://github.com/go-sql-driver/mysql#dsn-data-source-name for how
+// the DSN string is formatted
+func (d MySQLDriver) Open(dsn string) (driver.Conn, error) {
+	cfg, err := ParseDSN(dsn)
+	if err != nil {
+		return nil, err
+	}
+	c := &connector{
+		cfg: cfg,
+	}
+	return c.Connect(context.Background())
+}
+
+func init() {
+	sql.Register("mysql", &MySQLDriver{})
+}
+
+// NewConnector returns new driver.Connector.
+func NewConnector(cfg *Config) (driver.Connector, error) {
+	cfg = cfg.Clone()
+	// normalize the contents of cfg so calls to NewConnector have the same
+	// behavior as MySQLDriver.OpenConnector
+	if err := cfg.normalize(); err != nil {
+		return nil, err
+	}
+	return &connector{cfg: cfg}, nil
+}
+
+// OpenConnector implements driver.DriverContext.
+func (d MySQLDriver) OpenConnector(dsn string) (driver.Connector, error) {
+	cfg, err := ParseDSN(dsn)
+	if err != nil {
+		return nil, err
+	}
+	return &connector{
+		cfg: cfg,
+	}, nil
+}

services/tiktak/vendor/github.com/go-sql-driver/mysql/dsn.go

@@ -0,0 +1,560 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2016 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package mysql
+
+import (
+	"bytes"
+	"crypto/rsa"
+	"crypto/tls"
+	"errors"
+	"fmt"
+	"math/big"
+	"net"
+	"net/url"
+	"sort"
+	"strconv"
+	"strings"
+	"time"
+)
+
+var (
+	errInvalidDSNUnescaped       = errors.New("invalid DSN: did you forget to escape a param value?")
+	errInvalidDSNAddr            = errors.New("invalid DSN: network address not terminated (missing closing brace)")
+	errInvalidDSNNoSlash         = errors.New("invalid DSN: missing the slash separating the database name")
+	errInvalidDSNUnsafeCollation = errors.New("invalid DSN: interpolateParams can not be used with unsafe collations")
+)
+
+// Config is a configuration parsed from a DSN string.
+// If a new Config is created instead of being parsed from a DSN string,
+// the NewConfig function should be used, which sets default values.
+type Config struct {
+	User             string            // Username
+	Passwd           string            // Password (requires User)
+	Net              string            // Network type
+	Addr             string            // Network address (requires Net)
+	DBName           string            // Database name
+	Params           map[string]string // Connection parameters
+	Collation        string            // Connection collation
+	Loc              *time.Location    // Location for time.Time values
+	MaxAllowedPacket int               // Max packet size allowed
+	ServerPubKey     string            // Server public key name
+	pubKey           *rsa.PublicKey    // Server public key
+	TLSConfig        string            // TLS configuration name
+	tls              *tls.Config       // TLS configuration
+	Timeout          time.Duration     // Dial timeout
+	ReadTimeout      time.Duration     // I/O read timeout
+	WriteTimeout     time.Duration     // I/O write timeout
+
+	AllowAllFiles           bool // Allow all files to be used with LOAD DATA LOCAL INFILE
+	AllowCleartextPasswords bool // Allows the cleartext client side plugin
+	AllowNativePasswords    bool // Allows the native password authentication method
+	AllowOldPasswords       bool // Allows the old insecure password method
+	CheckConnLiveness       bool // Check connections for liveness before using them
+	ClientFoundRows         bool // Return number of matching rows instead of rows changed
+	ColumnsWithAlias        bool // Prepend table alias to column names
+	InterpolateParams       bool // Interpolate placeholders into query string
+	MultiStatements         bool // Allow multiple statements in one query
+	ParseTime               bool // Parse time values to time.Time
+	RejectReadOnly          bool // Reject read-only connections
+}
+
+// NewConfig creates a new Config and sets default values.
+func NewConfig() *Config {
+	return &Config{
+		Collation:            defaultCollation,
+		Loc:                  time.UTC,
+		MaxAllowedPacket:     defaultMaxAllowedPacket,
+		AllowNativePasswords: true,
+		CheckConnLiveness:    true,
+	}
+}
+
+func (cfg *Config) Clone() *Config {
+	cp := *cfg
+	if cp.tls != nil {
+		cp.tls = cfg.tls.Clone()
+	}
+	if len(cp.Params) > 0 {
+		cp.Params = make(map[string]string, len(cfg.Params))
+		for k, v := range cfg.Params {
+			cp.Params[k] = v
+		}
+	}
+	if cfg.pubKey != nil {
+		cp.pubKey = &rsa.PublicKey{
+			N: new(big.Int).Set(cfg.pubKey.N),
+			E: cfg.pubKey.E,
+		}
+	}
+	return &cp
+}
+
+func (cfg *Config) normalize() error {
+	if cfg.InterpolateParams && unsafeCollations[cfg.Collation] {
+		return errInvalidDSNUnsafeCollation
+	}
+
+	// Set default network if empty
+	if cfg.Net == "" {
+		cfg.Net = "tcp"
+	}
+
+	// Set default address if empty
+	if cfg.Addr == "" {
+		switch cfg.Net {
+		case "tcp":
+			cfg.Addr = "127.0.0.1:3306"
+		case "unix":
+			cfg.Addr = "/tmp/mysql.sock"
+		default:
+			return errors.New("default addr for network '" + cfg.Net + "' unknown")
+		}
+	} else if cfg.Net == "tcp" {
+		cfg.Addr = ensureHavePort(cfg.Addr)
+	}
+
+	switch cfg.TLSConfig {
+	case "false", "":
+		// don't set anything
+	case "true":
+		cfg.tls = &tls.Config{}
+	case "skip-verify", "preferred":
+		cfg.tls = &tls.Config{InsecureSkipVerify: true}
+	default:
+		cfg.tls = getTLSConfigClone(cfg.TLSConfig)
+		if cfg.tls == nil {
+			return errors.New("invalid value / unknown config name: " + cfg.TLSConfig)
+		}
+	}
+
+	if cfg.tls != nil && cfg.tls.ServerName == "" && !cfg.tls.InsecureSkipVerify {
+		host, _, err := net.SplitHostPort(cfg.Addr)
+		if err == nil {
+			cfg.tls.ServerName = host
+		}
+	}
+
+	if cfg.ServerPubKey != "" {
+		cfg.pubKey = getServerPubKey(cfg.ServerPubKey)
+		if cfg.pubKey == nil {
+			return errors.New("invalid value / unknown server pub key name: " + cfg.ServerPubKey)
+		}
+	}
+
+	return nil
+}
+
+func writeDSNParam(buf *bytes.Buffer, hasParam *bool, name, value string) {
+	buf.Grow(1 + len(name) + 1 + len(value))
+	if !*hasParam {
+		*hasParam = true
+		buf.WriteByte('?')
+	} else {
+		buf.WriteByte('&')
+	}
+	buf.WriteString(name)
+	buf.WriteByte('=')
+	buf.WriteString(value)
+}
+
+// FormatDSN formats the given Config into a DSN string which can be passed to
+// the driver.
+func (cfg *Config) FormatDSN() string {
+	var buf bytes.Buffer
+
+	// [username[:password]@]
+	if len(cfg.User) > 0 {
+		buf.WriteString(cfg.User)
+		if len(cfg.Passwd) > 0 {
+			buf.WriteByte(':')
+			buf.WriteString(cfg.Passwd)
+		}
+		buf.WriteByte('@')
+	}
+
+	// [protocol[(address)]]
+	if len(cfg.Net) > 0 {
+		buf.WriteString(cfg.Net)
+		if len(cfg.Addr) > 0 {
+			buf.WriteByte('(')
+			buf.WriteString(cfg.Addr)
+			buf.WriteByte(')')
+		}
+	}
+
+	// /dbname
+	buf.WriteByte('/')
+	buf.WriteString(cfg.DBName)
+
+	// [?param1=value1&...&paramN=valueN]
+	hasParam := false
+
+	if cfg.AllowAllFiles {
+		hasParam = true
+		buf.WriteString("?allowAllFiles=true")
+	}
+
+	if cfg.AllowCleartextPasswords {
+		writeDSNParam(&buf, &hasParam, "allowCleartextPasswords", "true")
+	}
+
+	if !cfg.AllowNativePasswords {
+		writeDSNParam(&buf, &hasParam, "allowNativePasswords", "false")
+	}
+
+	if cfg.AllowOldPasswords {
+		writeDSNParam(&buf, &hasParam, "allowOldPasswords", "true")
+	}
+
+	if !cfg.CheckConnLiveness {
+		writeDSNParam(&buf, &hasParam, "checkConnLiveness", "false")
+	}
+
+	if cfg.ClientFoundRows {
+		writeDSNParam(&buf, &hasParam, "clientFoundRows", "true")
+	}
+
+	if col := cfg.Collation; col != defaultCollation && len(col) > 0 {
+		writeDSNParam(&buf, &hasParam, "collation", col)
+	}
+
+	if cfg.ColumnsWithAlias {
+		writeDSNParam(&buf, &hasParam, "columnsWithAlias", "true")
+	}
+
+	if cfg.InterpolateParams {
+		writeDSNParam(&buf, &hasParam, "interpolateParams", "true")
+	}
+
+	if cfg.Loc != time.UTC && cfg.Loc != nil {
+		writeDSNParam(&buf, &hasParam, "loc", url.QueryEscape(cfg.Loc.String()))
+	}
+
+	if cfg.MultiStatements {
+		writeDSNParam(&buf, &hasParam, "multiStatements", "true")
+	}
+
+	if cfg.ParseTime {
+		writeDSNParam(&buf, &hasParam, "parseTime", "true")
+	}
+
+	if cfg.ReadTimeout > 0 {
+		writeDSNParam(&buf, &hasParam, "readTimeout", cfg.ReadTimeout.String())
+	}
+
+	if cfg.RejectReadOnly {
+		writeDSNParam(&buf, &hasParam, "rejectReadOnly", "true")
+	}
+
+	if len(cfg.ServerPubKey) > 0 {
+		writeDSNParam(&buf, &hasParam, "serverPubKey", url.QueryEscape(cfg.ServerPubKey))
+	}
+
+	if cfg.Timeout > 0 {
+		writeDSNParam(&buf, &hasParam, "timeout", cfg.Timeout.String())
+	}
+
+	if len(cfg.TLSConfig) > 0 {
+		writeDSNParam(&buf, &hasParam, "tls", url.QueryEscape(cfg.TLSConfig))
+	}
+
+	if cfg.WriteTimeout > 0 {
+		writeDSNParam(&buf, &hasParam, "writeTimeout", cfg.WriteTimeout.String())
+	}
+
+	if cfg.MaxAllowedPacket != defaultMaxAllowedPacket {
+		writeDSNParam(&buf, &hasParam, "maxAllowedPacket", strconv.Itoa(cfg.MaxAllowedPacket))
+	}
+
+	// other params
+	if cfg.Params != nil {
+		var params []string
+		for param := range cfg.Params {
+			params = append(params, param)
+		}
+		sort.Strings(params)
+		for _, param := range params {
+			writeDSNParam(&buf, &hasParam, param, url.QueryEscape(cfg.Params[param]))
+		}
+	}
+
+	return buf.String()
+}
+
+// ParseDSN parses the DSN string to a Config
+func ParseDSN(dsn string) (cfg *Config, err error) {
+	// New config with some default values
+	cfg = NewConfig()
+
+	// [user[:password]@][net[(addr)]]/dbname[?param1=value1&paramN=valueN]
+	// Find the last '/' (since the password or the net addr might contain a '/')
+	foundSlash := false
+	for i := len(dsn) - 1; i >= 0; i-- {
+		if dsn[i] == '/' {
+			foundSlash = true
+			var j, k int
+
+			// left part is empty if i <= 0
+			if i > 0 {
+				// [username[:password]@][protocol[(address)]]
+				// Find the last '@' in dsn[:i]
+				for j = i; j >= 0; j-- {
+					if dsn[j] == '@' {
+						// username[:password]
+						// Find the first ':' in dsn[:j]
+						for k = 0; k < j; k++ {
+							if dsn[k] == ':' {
+								cfg.Passwd = dsn[k+1 : j]
+								break
+							}
+						}
+						cfg.User = dsn[:k]
+
+						break
+					}
+				}
+
+				// [protocol[(address)]]
+				// Find the first '(' in dsn[j+1:i]
+				for k = j + 1; k < i; k++ {
+					if dsn[k] == '(' {
+						// dsn[i-1] must be == ')' if an address is specified
+						if dsn[i-1] != ')' {
+							if strings.ContainsRune(dsn[k+1:i], ')') {
+								return nil, errInvalidDSNUnescaped
+							}
+							return nil, errInvalidDSNAddr
+						}
+						cfg.Addr = dsn[k+1 : i-1]
+						break
+					}
+				}
+				cfg.Net = dsn[j+1 : k]
+			}
+
+			// dbname[?param1=value1&...&paramN=valueN]
+			// Find the first '?' in dsn[i+1:]
+			for j = i + 1; j < len(dsn); j++ {
+				if dsn[j] == '?' {
+					if err = parseDSNParams(cfg, dsn[j+1:]); err != nil {
+						return
+					}
+					break
+				}
+			}
+			cfg.DBName = dsn[i+1 : j]
+
+			break
+		}
+	}
+
+	if !foundSlash && len(dsn) > 0 {
+		return nil, errInvalidDSNNoSlash
+	}
+
+	if err = cfg.normalize(); err != nil {
+		return nil, err
+	}
+	return
+}
+
+// parseDSNParams parses the DSN "query string"
+// Values must be url.QueryEscape'ed
+func parseDSNParams(cfg *Config, params string) (err error) {
+	for _, v := range strings.Split(params, "&") {
+		param := strings.SplitN(v, "=", 2)
+		if len(param) != 2 {
+			continue
+		}
+
+		// cfg params
+		switch value := param[1]; param[0] {
+		// Disable INFILE whitelist / enable all files
+		case "allowAllFiles":
+			var isBool bool
+			cfg.AllowAllFiles, isBool = readBool(value)
+			if !isBool {
+				return errors.New("invalid bool value: " + value)
+			}
+
+		// Use cleartext authentication mode (MySQL 5.5.10+)
+		case "allowCleartextPasswords":
+			var isBool bool
+			cfg.AllowCleartextPasswords, isBool = readBool(value)
+			if !isBool {
+				return errors.New("invalid bool value: " + value)
+			}
+
+		// Use native password authentication
+		case "allowNativePasswords":
+			var isBool bool
+			cfg.AllowNativePasswords, isBool = readBool(value)
+			if !isBool {
+				return errors.New("invalid bool value: " + value)
+			}
+
+		// Use old authentication mode (pre MySQL 4.1)
+		case "allowOldPasswords":
+			var isBool bool
+			cfg.AllowOldPasswords, isBool = readBool(value)
+			if !isBool {
+				return errors.New("invalid bool value: " + value)
+			}
+
+		// Check connections for Liveness before using them
+		case "checkConnLiveness":
+			var isBool bool
+			cfg.CheckConnLiveness, isBool = readBool(value)
+			if !isBool {
+				return errors.New("invalid bool value: " + value)
+			}
+
+		// Switch "rowsAffected" mode
+		case "clientFoundRows":
+			var isBool bool
+			cfg.ClientFoundRows, isBool = readBool(value)
+			if !isBool {
+				return errors.New("invalid bool value: " + value)
+			}
+
+		// Collation
+		case "collation":
+			cfg.Collation = value
+			break
+
+		case "columnsWithAlias":
+			var isBool bool
+			cfg.ColumnsWithAlias, isBool = readBool(value)
+			if !isBool {
+				return errors.New("invalid bool value: " + value)
+			}
+
+		// Compression
+		case "compress":
+			return errors.New("compression not implemented yet")
+
+		// Enable client side placeholder substitution
+		case "interpolateParams":
+			var isBool bool
+			cfg.InterpolateParams, isBool = readBool(value)
+			if !isBool {
+				return errors.New("invalid bool value: " + value)
+			}
+
+		// Time Location
+		case "loc":
+			if value, err = url.QueryUnescape(value); err != nil {
+				return
+			}
+			cfg.Loc, err = time.LoadLocation(value)
+			if err != nil {
+				return
+			}
+
+		// multiple statements in one query
+		case "multiStatements":
+			var isBool bool
+			cfg.MultiStatements, isBool = readBool(value)
+			if !isBool {
+				return errors.New("invalid bool value: " + value)
+			}
+
+		// time.Time parsing
+		case "parseTime":
+			var isBool bool
+			cfg.ParseTime, isBool = readBool(value)
+			if !isBool {
+				return errors.New("invalid bool value: " + value)
+			}
+
+		// I/O read Timeout
+		case "readTimeout":
+			cfg.ReadTimeout, err = time.ParseDuration(value)
+			if err != nil {
+				return
+			}
+
+		// Reject read-only connections
+		case "rejectReadOnly":
+			var isBool bool
+			cfg.RejectReadOnly, isBool = readBool(value)
+			if !isBool {
+				return errors.New("invalid bool value: " + value)
+			}
+
+		// Server public key
+		case "serverPubKey":
+			name, err := url.QueryUnescape(value)
+			if err != nil {
+				return fmt.Errorf("invalid value for server pub key name: %v", err)
+			}
+			cfg.ServerPubKey = name
+
+		// Strict mode
+		case "strict":
+			panic("strict mode has been removed. See https://github.com/go-sql-driver/mysql/wiki/strict-mode")
+
+		// Dial Timeout
+		case "timeout":
+			cfg.Timeout, err = time.ParseDuration(value)
+			if err != nil {
+				return
+			}
+
+		// TLS-Encryption
+		case "tls":
+			boolValue, isBool := readBool(value)
+			if isBool {
+				if boolValue {
+					cfg.TLSConfig = "true"
+				} else {
+					cfg.TLSConfig = "false"
+				}
+			} else if vl := strings.ToLower(value); vl == "skip-verify" || vl == "preferred" {
+				cfg.TLSConfig = vl
+			} else {
+				name, err := url.QueryUnescape(value)
+				if err != nil {
+					return fmt.Errorf("invalid value for TLS config name: %v", err)
+				}
+				cfg.TLSConfig = name
+			}
+
+		// I/O write Timeout
+		case "writeTimeout":
+			cfg.WriteTimeout, err = time.ParseDuration(value)
+			if err != nil {
+				return
+			}
+		case "maxAllowedPacket":
+			cfg.MaxAllowedPacket, err = strconv.Atoi(value)
+			if err != nil {
+				return
+			}
+		default:
+			// lazy init
+			if cfg.Params == nil {
+				cfg.Params = make(map[string]string)
+			}
+
+			if cfg.Params[param[0]], err = url.QueryUnescape(value); err != nil {
+				return
+			}
+		}
+	}
+
+	return
+}
+
+func ensureHavePort(addr string) string {
+	if _, _, err := net.SplitHostPort(addr); err != nil {
+		return net.JoinHostPort(addr, "3306")
+	}
+	return addr
+}

services/tiktak/vendor/github.com/go-sql-driver/mysql/errors.go

@@ -0,0 +1,65 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2013 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package mysql
+
+import (
+	"errors"
+	"fmt"
+	"log"
+	"os"
+)
+
+// Various errors the driver might return. Can change between driver versions.
+var (
+	ErrInvalidConn       = errors.New("invalid connection")
+	ErrMalformPkt        = errors.New("malformed packet")
+	ErrNoTLS             = errors.New("TLS requested but server does not support TLS")
+	ErrCleartextPassword = errors.New("this user requires clear text authentication. If you still want to use it, please add 'allowCleartextPasswords=1' to your DSN")
+	ErrNativePassword    = errors.New("this user requires mysql native password authentication.")
+	ErrOldPassword       = errors.New("this user requires old password authentication. If you still want to use it, please add 'allowOldPasswords=1' to your DSN. See also https://github.com/go-sql-driver/mysql/wiki/old_passwords")
+	ErrUnknownPlugin     = errors.New("this authentication plugin is not supported")
+	ErrOldProtocol       = errors.New("MySQL server does not support required protocol 41+")
+	ErrPktSync           = errors.New("commands out of sync. You can't run this command now")
+	ErrPktSyncMul        = errors.New("commands out of sync. Did you run multiple statements at once?")
+	ErrPktTooLarge       = errors.New("packet for query is too large. Try adjusting the 'max_allowed_packet' variable on the server")
+	ErrBusyBuffer        = errors.New("busy buffer")
+
+	// errBadConnNoWrite is used for connection errors where nothing was sent to the database yet.
+	// If this happens first in a function starting a database interaction, it should be replaced by driver.ErrBadConn
+	// to trigger a resend.
+	// See https://github.com/go-sql-driver/mysql/pull/302
+	errBadConnNoWrite = errors.New("bad connection")
+)
+
+var errLog = Logger(log.New(os.Stderr, "[mysql] ", log.Ldate|log.Ltime|log.Lshortfile))
+
+// Logger is used to log critical error messages.
+type Logger interface {
+	Print(v ...interface{})
+}
+
+// SetLogger is used to set the logger for critical errors.
+// The initial logger is os.Stderr.
+func SetLogger(logger Logger) error {
+	if logger == nil {
+		return errors.New("logger is nil")
+	}
+	errLog = logger
+	return nil
+}
+
+// MySQLError is an error type which represents a single MySQL error
+type MySQLError struct {
+	Number  uint16
+	Message string
+}
+
+func (me *MySQLError) Error() string {
+	return fmt.Sprintf("Error %d: %s", me.Number, me.Message)
+}

services/tiktak/vendor/github.com/go-sql-driver/mysql/fields.go

@@ -0,0 +1,194 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2017 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package mysql
+
+import (
+	"database/sql"
+	"reflect"
+)
+
+func (mf *mysqlField) typeDatabaseName() string {
+	switch mf.fieldType {
+	case fieldTypeBit:
+		return "BIT"
+	case fieldTypeBLOB:
+		if mf.charSet != collations[binaryCollation] {
+			return "TEXT"
+		}
+		return "BLOB"
+	case fieldTypeDate:
+		return "DATE"
+	case fieldTypeDateTime:
+		return "DATETIME"
+	case fieldTypeDecimal:
+		return "DECIMAL"
+	case fieldTypeDouble:
+		return "DOUBLE"
+	case fieldTypeEnum:
+		return "ENUM"
+	case fieldTypeFloat:
+		return "FLOAT"
+	case fieldTypeGeometry:
+		return "GEOMETRY"
+	case fieldTypeInt24:
+		return "MEDIUMINT"
+	case fieldTypeJSON:
+		return "JSON"
+	case fieldTypeLong:
+		return "INT"
+	case fieldTypeLongBLOB:
+		if mf.charSet != collations[binaryCollation] {
+			return "LONGTEXT"
+		}
+		return "LONGBLOB"
+	case fieldTypeLongLong:
+		return "BIGINT"
+	case fieldTypeMediumBLOB:
+		if mf.charSet != collations[binaryCollation] {
+			return "MEDIUMTEXT"
+		}
+		return "MEDIUMBLOB"
+	case fieldTypeNewDate:
+		return "DATE"
+	case fieldTypeNewDecimal:
+		return "DECIMAL"
+	case fieldTypeNULL:
+		return "NULL"
+	case fieldTypeSet:
+		return "SET"
+	case fieldTypeShort:
+		return "SMALLINT"
+	case fieldTypeString:
+		if mf.charSet == collations[binaryCollation] {
+			return "BINARY"
+		}
+		return "CHAR"
+	case fieldTypeTime:
+		return "TIME"
+	case fieldTypeTimestamp:
+		return "TIMESTAMP"
+	case fieldTypeTiny:
+		return "TINYINT"
+	case fieldTypeTinyBLOB:
+		if mf.charSet != collations[binaryCollation] {
+			return "TINYTEXT"
+		}
+		return "TINYBLOB"
+	case fieldTypeVarChar:
+		if mf.charSet == collations[binaryCollation] {
+			return "VARBINARY"
+		}
+		return "VARCHAR"
+	case fieldTypeVarString:
+		if mf.charSet == collations[binaryCollation] {
+			return "VARBINARY"
+		}
+		return "VARCHAR"
+	case fieldTypeYear:
+		return "YEAR"
+	default:
+		return ""
+	}
+}
+
+var (
+	scanTypeFloat32   = reflect.TypeOf(float32(0))
+	scanTypeFloat64   = reflect.TypeOf(float64(0))
+	scanTypeInt8      = reflect.TypeOf(int8(0))
+	scanTypeInt16     = reflect.TypeOf(int16(0))
+	scanTypeInt32     = reflect.TypeOf(int32(0))
+	scanTypeInt64     = reflect.TypeOf(int64(0))
+	scanTypeNullFloat = reflect.TypeOf(sql.NullFloat64{})
+	scanTypeNullInt   = reflect.TypeOf(sql.NullInt64{})
+	scanTypeNullTime  = reflect.TypeOf(NullTime{})
+	scanTypeUint8     = reflect.TypeOf(uint8(0))
+	scanTypeUint16    = reflect.TypeOf(uint16(0))
+	scanTypeUint32    = reflect.TypeOf(uint32(0))
+	scanTypeUint64    = reflect.TypeOf(uint64(0))
+	scanTypeRawBytes  = reflect.TypeOf(sql.RawBytes{})
+	scanTypeUnknown   = reflect.TypeOf(new(interface{}))
+)
+
+type mysqlField struct {
+	tableName string
+	name      string
+	length    uint32
+	flags     fieldFlag
+	fieldType fieldType
+	decimals  byte
+	charSet   uint8
+}
+
+func (mf *mysqlField) scanType() reflect.Type {
+	switch mf.fieldType {
+	case fieldTypeTiny:
+		if mf.flags&flagNotNULL != 0 {
+			if mf.flags&flagUnsigned != 0 {
+				return scanTypeUint8
+			}
+			return scanTypeInt8
+		}
+		return scanTypeNullInt
+
+	case fieldTypeShort, fieldTypeYear:
+		if mf.flags&flagNotNULL != 0 {
+			if mf.flags&flagUnsigned != 0 {
+				return scanTypeUint16
+			}
+			return scanTypeInt16
+		}
+		return scanTypeNullInt
+
+	case fieldTypeInt24, fieldTypeLong:
+		if mf.flags&flagNotNULL != 0 {
+			if mf.flags&flagUnsigned != 0 {
+				return scanTypeUint32
+			}
+			return scanTypeInt32
+		}
+		return scanTypeNullInt
+
+	case fieldTypeLongLong:
+		if mf.flags&flagNotNULL != 0 {
+			if mf.flags&flagUnsigned != 0 {
+				return scanTypeUint64
+			}
+			return scanTypeInt64
+		}
+		return scanTypeNullInt
+
+	case fieldTypeFloat:
+		if mf.flags&flagNotNULL != 0 {
+			return scanTypeFloat32
+		}
+		return scanTypeNullFloat
+
+	case fieldTypeDouble:
+		if mf.flags&flagNotNULL != 0 {
+			return scanTypeFloat64
+		}
+		return scanTypeNullFloat
+
+	case fieldTypeDecimal, fieldTypeNewDecimal, fieldTypeVarChar,
+		fieldTypeBit, fieldTypeEnum, fieldTypeSet, fieldTypeTinyBLOB,
+		fieldTypeMediumBLOB, fieldTypeLongBLOB, fieldTypeBLOB,
+		fieldTypeVarString, fieldTypeString, fieldTypeGeometry, fieldTypeJSON,
+		fieldTypeTime:
+		return scanTypeRawBytes
+
+	case fieldTypeDate, fieldTypeNewDate,
+		fieldTypeTimestamp, fieldTypeDateTime:
+		// NullTime is always returned for more consistent behavior as it can
+		// handle both cases of parseTime regardless if the field is nullable.
+		return scanTypeNullTime
+
+	default:
+		return scanTypeUnknown
+	}
+}

services/tiktak/vendor/github.com/go-sql-driver/mysql/go.mod

@@ -0,0 +1,3 @@
+module github.com/go-sql-driver/mysql
+
+go 1.10

services/tiktak/vendor/github.com/go-sql-driver/mysql/infile.go

@@ -0,0 +1,182 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2013 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package mysql
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"strings"
+	"sync"
+)
+
+var (
+	fileRegister       map[string]bool
+	fileRegisterLock   sync.RWMutex
+	readerRegister     map[string]func() io.Reader
+	readerRegisterLock sync.RWMutex
+)
+
+// RegisterLocalFile adds the given file to the file whitelist,
+// so that it can be used by "LOAD DATA LOCAL INFILE <filepath>".
+// Alternatively you can allow the use of all local files with
+// the DSN parameter 'allowAllFiles=true'
+//
+//  filePath := "/home/gopher/data.csv"
+//  mysql.RegisterLocalFile(filePath)
+//  err := db.Exec("LOAD DATA LOCAL INFILE '" + filePath + "' INTO TABLE foo")
+//  if err != nil {
+//  ...
+//
+func RegisterLocalFile(filePath string) {
+	fileRegisterLock.Lock()
+	// lazy map init
+	if fileRegister == nil {
+		fileRegister = make(map[string]bool)
+	}
+
+	fileRegister[strings.Trim(filePath, `"`)] = true
+	fileRegisterLock.Unlock()
+}
+
+// DeregisterLocalFile removes the given filepath from the whitelist.
+func DeregisterLocalFile(filePath string) {
+	fileRegisterLock.Lock()
+	delete(fileRegister, strings.Trim(filePath, `"`))
+	fileRegisterLock.Unlock()
+}
+
+// RegisterReaderHandler registers a handler function which is used
+// to receive a io.Reader.
+// The Reader can be used by "LOAD DATA LOCAL INFILE Reader::<name>".
+// If the handler returns a io.ReadCloser Close() is called when the
+// request is finished.
+//
+//  mysql.RegisterReaderHandler("data", func() io.Reader {
+//  	var csvReader io.Reader // Some Reader that returns CSV data
+//  	... // Open Reader here
+//  	return csvReader
+//  })
+//  err := db.Exec("LOAD DATA LOCAL INFILE 'Reader::data' INTO TABLE foo")
+//  if err != nil {
+//  ...
+//
+func RegisterReaderHandler(name string, handler func() io.Reader) {
+	readerRegisterLock.Lock()
+	// lazy map init
+	if readerRegister == nil {
+		readerRegister = make(map[string]func() io.Reader)
+	}
+
+	readerRegister[name] = handler
+	readerRegisterLock.Unlock()
+}
+
+// DeregisterReaderHandler removes the ReaderHandler function with
+// the given name from the registry.
+func DeregisterReaderHandler(name string) {
+	readerRegisterLock.Lock()
+	delete(readerRegister, name)
+	readerRegisterLock.Unlock()
+}
+
+func deferredClose(err *error, closer io.Closer) {
+	closeErr := closer.Close()
+	if *err == nil {
+		*err = closeErr
+	}
+}
+
+func (mc *mysqlConn) handleInFileRequest(name string) (err error) {
+	var rdr io.Reader
+	var data []byte
+	packetSize := 16 * 1024 // 16KB is small enough for disk readahead and large enough for TCP
+	if mc.maxWriteSize < packetSize {
+		packetSize = mc.maxWriteSize
+	}
+
+	if idx := strings.Index(name, "Reader::"); idx == 0 || (idx > 0 && name[idx-1] == '/') { // io.Reader
+		// The server might return an an absolute path. See issue #355.
+		name = name[idx+8:]
+
+		readerRegisterLock.RLock()
+		handler, inMap := readerRegister[name]
+		readerRegisterLock.RUnlock()
+
+		if inMap {
+			rdr = handler()
+			if rdr != nil {
+				if cl, ok := rdr.(io.Closer); ok {
+					defer deferredClose(&err, cl)
+				}
+			} else {
+				err = fmt.Errorf("Reader '%s' is <nil>", name)
+			}
+		} else {
+			err = fmt.Errorf("Reader '%s' is not registered", name)
+		}
+	} else { // File
+		name = strings.Trim(name, `"`)
+		fileRegisterLock.RLock()
+		fr := fileRegister[name]
+		fileRegisterLock.RUnlock()
+		if mc.cfg.AllowAllFiles || fr {
+			var file *os.File
+			var fi os.FileInfo
+
+			if file, err = os.Open(name); err == nil {
+				defer deferredClose(&err, file)
+
+				// get file size
+				if fi, err = file.Stat(); err == nil {
+					rdr = file
+					if fileSize := int(fi.Size()); fileSize < packetSize {
+						packetSize = fileSize
+					}
+				}
+			}
+		} else {
+			err = fmt.Errorf("local file '%s' is not registered", name)
+		}
+	}
+
+	// send content packets
+	// if packetSize == 0, the Reader contains no data
+	if err == nil && packetSize > 0 {
+		data := make([]byte, 4+packetSize)
+		var n int
+		for err == nil {
+			n, err = rdr.Read(data[4:])
+			if n > 0 {
+				if ioErr := mc.writePacket(data[:4+n]); ioErr != nil {
+					return ioErr
+				}
+			}
+		}
+		if err == io.EOF {
+			err = nil
+		}
+	}
+
+	// send empty packet (termination)
+	if data == nil {
+		data = make([]byte, 4)
+	}
+	if ioErr := mc.writePacket(data[:4]); ioErr != nil {
+		return ioErr
+	}
+
+	// read OK packet
+	if err == nil {
+		return mc.readResultOK()
+	}
+
+	mc.readPacket()
+	return err
+}

services/tiktak/vendor/github.com/go-sql-driver/mysql/nulltime.go

@@ -0,0 +1,50 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2013 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package mysql
+
+import (
+	"database/sql/driver"
+	"fmt"
+	"time"
+)
+
+// Scan implements the Scanner interface.
+// The value type must be time.Time or string / []byte (formatted time-string),
+// otherwise Scan fails.
+func (nt *NullTime) Scan(value interface{}) (err error) {
+	if value == nil {
+		nt.Time, nt.Valid = time.Time{}, false
+		return
+	}
+
+	switch v := value.(type) {
+	case time.Time:
+		nt.Time, nt.Valid = v, true
+		return
+	case []byte:
+		nt.Time, err = parseDateTime(string(v), time.UTC)
+		nt.Valid = (err == nil)
+		return
+	case string:
+		nt.Time, err = parseDateTime(v, time.UTC)
+		nt.Valid = (err == nil)
+		return
+	}
+
+	nt.Valid = false
+	return fmt.Errorf("Can't convert %T to time.Time", value)
+}
+
+// Value implements the driver Valuer interface.
+func (nt NullTime) Value() (driver.Value, error) {
+	if !nt.Valid {
+		return nil, nil
+	}
+	return nt.Time, nil
+}

services/tiktak/vendor/github.com/go-sql-driver/mysql/nulltime_go113.go

@@ -0,0 +1,31 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2013 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+// +build go1.13
+
+package mysql
+
+import (
+	"database/sql"
+)
+
+// NullTime represents a time.Time that may be NULL.
+// NullTime implements the Scanner interface so
+// it can be used as a scan destination:
+//
+//  var nt NullTime
+//  err := db.QueryRow("SELECT time FROM foo WHERE id=?", id).Scan(&nt)
+//  ...
+//  if nt.Valid {
+//     // use nt.Time
+//  } else {
+//     // NULL value
+//  }
+//
+// This NullTime implementation is not driver-specific
+type NullTime sql.NullTime

services/tiktak/vendor/github.com/go-sql-driver/mysql/nulltime_legacy.go

@@ -0,0 +1,34 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2013 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+// +build !go1.13
+
+package mysql
+
+import (
+	"time"
+)
+
+// NullTime represents a time.Time that may be NULL.
+// NullTime implements the Scanner interface so
+// it can be used as a scan destination:
+//
+//  var nt NullTime
+//  err := db.QueryRow("SELECT time FROM foo WHERE id=?", id).Scan(&nt)
+//  ...
+//  if nt.Valid {
+//     // use nt.Time
+//  } else {
+//     // NULL value
+//  }
+//
+// This NullTime implementation is not driver-specific
+type NullTime struct {
+	Time  time.Time
+	Valid bool // Valid is true if Time is not NULL
+}

services/tiktak/vendor/github.com/go-sql-driver/mysql/result.go

@@ -0,0 +1,22 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package mysql
+
+type mysqlResult struct {
+	affectedRows int64
+	insertId     int64
+}
+
+func (res *mysqlResult) LastInsertId() (int64, error) {
+	return res.insertId, nil
+}
+
+func (res *mysqlResult) RowsAffected() (int64, error) {
+	return res.affectedRows, nil
+}

services/tiktak/vendor/github.com/go-sql-driver/mysql/rows.go

@@ -0,0 +1,223 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package mysql
+
+import (
+	"database/sql/driver"
+	"io"
+	"math"
+	"reflect"
+)
+
+type resultSet struct {
+	columns     []mysqlField
+	columnNames []string
+	done        bool
+}
+
+type mysqlRows struct {
+	mc     *mysqlConn
+	rs     resultSet
+	finish func()
+}
+
+type binaryRows struct {
+	mysqlRows
+}
+
+type textRows struct {
+	mysqlRows
+}
+
+func (rows *mysqlRows) Columns() []string {
+	if rows.rs.columnNames != nil {
+		return rows.rs.columnNames
+	}
+
+	columns := make([]string, len(rows.rs.columns))
+	if rows.mc != nil && rows.mc.cfg.ColumnsWithAlias {
+		for i := range columns {
+			if tableName := rows.rs.columns[i].tableName; len(tableName) > 0 {
+				columns[i] = tableName + "." + rows.rs.columns[i].name
+			} else {
+				columns[i] = rows.rs.columns[i].name
+			}
+		}
+	} else {
+		for i := range columns {
+			columns[i] = rows.rs.columns[i].name
+		}
+	}
+
+	rows.rs.columnNames = columns
+	return columns
+}
+
+func (rows *mysqlRows) ColumnTypeDatabaseTypeName(i int) string {
+	return rows.rs.columns[i].typeDatabaseName()
+}
+
+// func (rows *mysqlRows) ColumnTypeLength(i int) (length int64, ok bool) {
+// 	return int64(rows.rs.columns[i].length), true
+// }
+
+func (rows *mysqlRows) ColumnTypeNullable(i int) (nullable, ok bool) {
+	return rows.rs.columns[i].flags&flagNotNULL == 0, true
+}
+
+func (rows *mysqlRows) ColumnTypePrecisionScale(i int) (int64, int64, bool) {
+	column := rows.rs.columns[i]
+	decimals := int64(column.decimals)
+
+	switch column.fieldType {
+	case fieldTypeDecimal, fieldTypeNewDecimal:
+		if decimals > 0 {
+			return int64(column.length) - 2, decimals, true
+		}
+		return int64(column.length) - 1, decimals, true
+	case fieldTypeTimestamp, fieldTypeDateTime, fieldTypeTime:
+		return decimals, decimals, true
+	case fieldTypeFloat, fieldTypeDouble:
+		if decimals == 0x1f {
+			return math.MaxInt64, math.MaxInt64, true
+		}
+		return math.MaxInt64, decimals, true
+	}
+
+	return 0, 0, false
+}
+
+func (rows *mysqlRows) ColumnTypeScanType(i int) reflect.Type {
+	return rows.rs.columns[i].scanType()
+}
+
+func (rows *mysqlRows) Close() (err error) {
+	if f := rows.finish; f != nil {
+		f()
+		rows.finish = nil
+	}
+
+	mc := rows.mc
+	if mc == nil {
+		return nil
+	}
+	if err := mc.error(); err != nil {
+		return err
+	}
+
+	// flip the buffer for this connection if we need to drain it.
+	// note that for a successful query (i.e. one where rows.next()
+	// has been called until it returns false), `rows.mc` will be nil
+	// by the time the user calls `(*Rows).Close`, so we won't reach this
+	// see: https://github.com/golang/go/commit/651ddbdb5056ded455f47f9c494c67b389622a47
+	mc.buf.flip()
+
+	// Remove unread packets from stream
+	if !rows.rs.done {
+		err = mc.readUntilEOF()
+	}
+	if err == nil {
+		if err = mc.discardResults(); err != nil {
+			return err
+		}
+	}
+
+	rows.mc = nil
+	return err
+}
+
+func (rows *mysqlRows) HasNextResultSet() (b bool) {
+	if rows.mc == nil {
+		return false
+	}
+	return rows.mc.status&statusMoreResultsExists != 0
+}
+
+func (rows *mysqlRows) nextResultSet() (int, error) {
+	if rows.mc == nil {
+		return 0, io.EOF
+	}
+	if err := rows.mc.error(); err != nil {
+		return 0, err
+	}
+
+	// Remove unread packets from stream
+	if !rows.rs.done {
+		if err := rows.mc.readUntilEOF(); err != nil {
+			return 0, err
+		}
+		rows.rs.done = true
+	}
+
+	if !rows.HasNextResultSet() {
+		rows.mc = nil
+		return 0, io.EOF
+	}
+	rows.rs = resultSet{}
+	return rows.mc.readResultSetHeaderPacket()
+}
+
+func (rows *mysqlRows) nextNotEmptyResultSet() (int, error) {
+	for {
+		resLen, err := rows.nextResultSet()
+		if err != nil {
+			return 0, err
+		}
+
+		if resLen > 0 {
+			return resLen, nil
+		}
+
+		rows.rs.done = true
+	}
+}
+
+func (rows *binaryRows) NextResultSet() error {
+	resLen, err := rows.nextNotEmptyResultSet()
+	if err != nil {
+		return err
+	}
+
+	rows.rs.columns, err = rows.mc.readColumns(resLen)
+	return err
+}
+
+func (rows *binaryRows) Next(dest []driver.Value) error {
+	if mc := rows.mc; mc != nil {
+		if err := mc.error(); err != nil {
+			return err
+		}
+
+		// Fetch next row from stream
+		return rows.readRow(dest)
+	}
+	return io.EOF
+}
+
+func (rows *textRows) NextResultSet() (err error) {
+	resLen, err := rows.nextNotEmptyResultSet()
+	if err != nil {
+		return err
+	}
+
+	rows.rs.columns, err = rows.mc.readColumns(resLen)
+	return err
+}
+
+func (rows *textRows) Next(dest []driver.Value) error {
+	if mc := rows.mc; mc != nil {
+		if err := mc.error(); err != nil {
+			return err
+		}
+
+		// Fetch next row from stream
+		return rows.readRow(dest)
+	}
+	return io.EOF
+}

services/tiktak/vendor/github.com/go-sql-driver/mysql/statement.go

@@ -0,0 +1,204 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package mysql
+
+import (
+	"database/sql/driver"
+	"fmt"
+	"io"
+	"reflect"
+)
+
+type mysqlStmt struct {
+	mc         *mysqlConn
+	id         uint32
+	paramCount int
+}
+
+func (stmt *mysqlStmt) Close() error {
+	if stmt.mc == nil || stmt.mc.closed.IsSet() {
+		// driver.Stmt.Close can be called more than once, thus this function
+		// has to be idempotent.
+		// See also Issue #450 and golang/go#16019.
+		//errLog.Print(ErrInvalidConn)
+		return driver.ErrBadConn
+	}
+
+	err := stmt.mc.writeCommandPacketUint32(comStmtClose, stmt.id)
+	stmt.mc = nil
+	return err
+}
+
+func (stmt *mysqlStmt) NumInput() int {
+	return stmt.paramCount
+}
+
+func (stmt *mysqlStmt) ColumnConverter(idx int) driver.ValueConverter {
+	return converter{}
+}
+
+func (stmt *mysqlStmt) Exec(args []driver.Value) (driver.Result, error) {
+	if stmt.mc.closed.IsSet() {
+		errLog.Print(ErrInvalidConn)
+		return nil, driver.ErrBadConn
+	}
+	// Send command
+	err := stmt.writeExecutePacket(args)
+	if err != nil {
+		return nil, stmt.mc.markBadConn(err)
+	}
+
+	mc := stmt.mc
+
+	mc.affectedRows = 0
+	mc.insertId = 0
+
+	// Read Result
+	resLen, err := mc.readResultSetHeaderPacket()
+	if err != nil {
+		return nil, err
+	}
+
+	if resLen > 0 {
+		// Columns
+		if err = mc.readUntilEOF(); err != nil {
+			return nil, err
+		}
+
+		// Rows
+		if err := mc.readUntilEOF(); err != nil {
+			return nil, err
+		}
+	}
+
+	if err := mc.discardResults(); err != nil {
+		return nil, err
+	}
+
+	return &mysqlResult{
+		affectedRows: int64(mc.affectedRows),
+		insertId:     int64(mc.insertId),
+	}, nil
+}
+
+func (stmt *mysqlStmt) Query(args []driver.Value) (driver.Rows, error) {
+	return stmt.query(args)
+}
+
+func (stmt *mysqlStmt) query(args []driver.Value) (*binaryRows, error) {
+	if stmt.mc.closed.IsSet() {
+		errLog.Print(ErrInvalidConn)
+		return nil, driver.ErrBadConn
+	}
+	// Send command
+	err := stmt.writeExecutePacket(args)
+	if err != nil {
+		return nil, stmt.mc.markBadConn(err)
+	}
+
+	mc := stmt.mc
+
+	// Read Result
+	resLen, err := mc.readResultSetHeaderPacket()
+	if err != nil {
+		return nil, err
+	}
+
+	rows := new(binaryRows)
+
+	if resLen > 0 {
+		rows.mc = mc
+		rows.rs.columns, err = mc.readColumns(resLen)
+	} else {
+		rows.rs.done = true
+
+		switch err := rows.NextResultSet(); err {
+		case nil, io.EOF:
+			return rows, nil
+		default:
+			return nil, err
+		}
+	}
+
+	return rows, err
+}
+
+type converter struct{}
+
+// ConvertValue mirrors the reference/default converter in database/sql/driver
+// with _one_ exception.  We support uint64 with their high bit and the default
+// implementation does not.  This function should be kept in sync with
+// database/sql/driver defaultConverter.ConvertValue() except for that
+// deliberate difference.
+func (c converter) ConvertValue(v interface{}) (driver.Value, error) {
+	if driver.IsValue(v) {
+		return v, nil
+	}
+
+	if vr, ok := v.(driver.Valuer); ok {
+		sv, err := callValuerValue(vr)
+		if err != nil {
+			return nil, err
+		}
+		if !driver.IsValue(sv) {
+			return nil, fmt.Errorf("non-Value type %T returned from Value", sv)
+		}
+		return sv, nil
+	}
+
+	rv := reflect.ValueOf(v)
+	switch rv.Kind() {
+	case reflect.Ptr:
+		// indirect pointers
+		if rv.IsNil() {
+			return nil, nil
+		} else {
+			return c.ConvertValue(rv.Elem().Interface())
+		}
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return rv.Int(), nil
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		return rv.Uint(), nil
+	case reflect.Float32, reflect.Float64:
+		return rv.Float(), nil
+	case reflect.Bool:
+		return rv.Bool(), nil
+	case reflect.Slice:
+		ek := rv.Type().Elem().Kind()
+		if ek == reflect.Uint8 {
+			return rv.Bytes(), nil
+		}
+		return nil, fmt.Errorf("unsupported type %T, a slice of %s", v, ek)
+	case reflect.String:
+		return rv.String(), nil
+	}
+	return nil, fmt.Errorf("unsupported type %T, a %s", v, rv.Kind())
+}
+
+var valuerReflectType = reflect.TypeOf((*driver.Valuer)(nil)).Elem()
+
+// callValuerValue returns vr.Value(), with one exception:
+// If vr.Value is an auto-generated method on a pointer type and the
+// pointer is nil, it would panic at runtime in the panicwrap
+// method. Treat it like nil instead.
+//
+// This is so people can implement driver.Value on value types and
+// still use nil pointers to those types to mean nil/NULL, just like
+// string/*string.
+//
+// This is an exact copy of the same-named unexported function from the
+// database/sql package.
+func callValuerValue(vr driver.Valuer) (v driver.Value, err error) {
+	if rv := reflect.ValueOf(vr); rv.Kind() == reflect.Ptr &&
+		rv.IsNil() &&
+		rv.Type().Elem().Implements(valuerReflectType) {
+		return nil, nil
+	}
+	return vr.Value()
+}

services/tiktak/vendor/github.com/go-sql-driver/mysql/transaction.go

@@ -0,0 +1,31 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package mysql
+
+type mysqlTx struct {
+	mc *mysqlConn
+}
+
+func (tx *mysqlTx) Commit() (err error) {
+	if tx.mc == nil || tx.mc.closed.IsSet() {
+		return ErrInvalidConn
+	}
+	err = tx.mc.exec("COMMIT")
+	tx.mc = nil
+	return
+}
+
+func (tx *mysqlTx) Rollback() (err error) {
+	if tx.mc == nil || tx.mc.closed.IsSet() {
+		return ErrInvalidConn
+	}
+	err = tx.mc.exec("ROLLBACK")
+	tx.mc = nil
+	return
+}

services/tiktak/vendor/github.com/go-sql-driver/mysql/utils.go

@@ -0,0 +1,701 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package mysql
+
+import (
+	"crypto/tls"
+	"database/sql"
+	"database/sql/driver"
+	"encoding/binary"
+	"errors"
+	"fmt"
+	"io"
+	"strconv"
+	"strings"
+	"sync"
+	"sync/atomic"
+	"time"
+)
+
+// Registry for custom tls.Configs
+var (
+	tlsConfigLock     sync.RWMutex
+	tlsConfigRegistry map[string]*tls.Config
+)
+
+// RegisterTLSConfig registers a custom tls.Config to be used with sql.Open.
+// Use the key as a value in the DSN where tls=value.
+//
+// Note: The provided tls.Config is exclusively owned by the driver after
+// registering it.
+//
+//  rootCertPool := x509.NewCertPool()
+//  pem, err := ioutil.ReadFile("/path/ca-cert.pem")
+//  if err != nil {
+//      log.Fatal(err)
+//  }
+//  if ok := rootCertPool.AppendCertsFromPEM(pem); !ok {
+//      log.Fatal("Failed to append PEM.")
+//  }
+//  clientCert := make([]tls.Certificate, 0, 1)
+//  certs, err := tls.LoadX509KeyPair("/path/client-cert.pem", "/path/client-key.pem")
+//  if err != nil {
+//      log.Fatal(err)
+//  }
+//  clientCert = append(clientCert, certs)
+//  mysql.RegisterTLSConfig("custom", &tls.Config{
+//      RootCAs: rootCertPool,
+//      Certificates: clientCert,
+//  })
+//  db, err := sql.Open("mysql", "user@tcp(localhost:3306)/test?tls=custom")
+//
+func RegisterTLSConfig(key string, config *tls.Config) error {
+	if _, isBool := readBool(key); isBool || strings.ToLower(key) == "skip-verify" || strings.ToLower(key) == "preferred" {
+		return fmt.Errorf("key '%s' is reserved", key)
+	}
+
+	tlsConfigLock.Lock()
+	if tlsConfigRegistry == nil {
+		tlsConfigRegistry = make(map[string]*tls.Config)
+	}
+
+	tlsConfigRegistry[key] = config
+	tlsConfigLock.Unlock()
+	return nil
+}
+
+// DeregisterTLSConfig removes the tls.Config associated with key.
+func DeregisterTLSConfig(key string) {
+	tlsConfigLock.Lock()
+	if tlsConfigRegistry != nil {
+		delete(tlsConfigRegistry, key)
+	}
+	tlsConfigLock.Unlock()
+}
+
+func getTLSConfigClone(key string) (config *tls.Config) {
+	tlsConfigLock.RLock()
+	if v, ok := tlsConfigRegistry[key]; ok {
+		config = v.Clone()
+	}
+	tlsConfigLock.RUnlock()
+	return
+}
+
+// Returns the bool value of the input.
+// The 2nd return value indicates if the input was a valid bool value
+func readBool(input string) (value bool, valid bool) {
+	switch input {
+	case "1", "true", "TRUE", "True":
+		return true, true
+	case "0", "false", "FALSE", "False":
+		return false, true
+	}
+
+	// Not a valid bool value
+	return
+}
+
+/******************************************************************************
+*                           Time related utils                                *
+******************************************************************************/
+
+func parseDateTime(str string, loc *time.Location) (t time.Time, err error) {
+	base := "0000-00-00 00:00:00.0000000"
+	switch len(str) {
+	case 10, 19, 21, 22, 23, 24, 25, 26: // up to "YYYY-MM-DD HH:MM:SS.MMMMMM"
+		if str == base[:len(str)] {
+			return
+		}
+		t, err = time.Parse(timeFormat[:len(str)], str)
+	default:
+		err = fmt.Errorf("invalid time string: %s", str)
+		return
+	}
+
+	// Adjust location
+	if err == nil && loc != time.UTC {
+		y, mo, d := t.Date()
+		h, mi, s := t.Clock()
+		t, err = time.Date(y, mo, d, h, mi, s, t.Nanosecond(), loc), nil
+	}
+
+	return
+}
+
+func parseBinaryDateTime(num uint64, data []byte, loc *time.Location) (driver.Value, error) {
+	switch num {
+	case 0:
+		return time.Time{}, nil
+	case 4:
+		return time.Date(
+			int(binary.LittleEndian.Uint16(data[:2])), // year
+			time.Month(data[2]),                       // month
+			int(data[3]),                              // day
+			0, 0, 0, 0,
+			loc,
+		), nil
+	case 7:
+		return time.Date(
+			int(binary.LittleEndian.Uint16(data[:2])), // year
+			time.Month(data[2]),                       // month
+			int(data[3]),                              // day
+			int(data[4]),                              // hour
+			int(data[5]),                              // minutes
+			int(data[6]),                              // seconds
+			0,
+			loc,
+		), nil
+	case 11:
+		return time.Date(
+			int(binary.LittleEndian.Uint16(data[:2])), // year
+			time.Month(data[2]),                       // month
+			int(data[3]),                              // day
+			int(data[4]),                              // hour
+			int(data[5]),                              // minutes
+			int(data[6]),                              // seconds
+			int(binary.LittleEndian.Uint32(data[7:11]))*1000, // nanoseconds
+			loc,
+		), nil
+	}
+	return nil, fmt.Errorf("invalid DATETIME packet length %d", num)
+}
+
+// zeroDateTime is used in formatBinaryDateTime to avoid an allocation
+// if the DATE or DATETIME has the zero value.
+// It must never be changed.
+// The current behavior depends on database/sql copying the result.
+var zeroDateTime = []byte("0000-00-00 00:00:00.000000")
+
+const digits01 = "0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789"
+const digits10 = "0000000000111111111122222222223333333333444444444455555555556666666666777777777788888888889999999999"
+
+func appendMicrosecs(dst, src []byte, decimals int) []byte {
+	if decimals <= 0 {
+		return dst
+	}
+	if len(src) == 0 {
+		return append(dst, ".000000"[:decimals+1]...)
+	}
+
+	microsecs := binary.LittleEndian.Uint32(src[:4])
+	p1 := byte(microsecs / 10000)
+	microsecs -= 10000 * uint32(p1)
+	p2 := byte(microsecs / 100)
+	microsecs -= 100 * uint32(p2)
+	p3 := byte(microsecs)
+
+	switch decimals {
+	default:
+		return append(dst, '.',
+			digits10[p1], digits01[p1],
+			digits10[p2], digits01[p2],
+			digits10[p3], digits01[p3],
+		)
+	case 1:
+		return append(dst, '.',
+			digits10[p1],
+		)
+	case 2:
+		return append(dst, '.',
+			digits10[p1], digits01[p1],
+		)
+	case 3:
+		return append(dst, '.',
+			digits10[p1], digits01[p1],
+			digits10[p2],
+		)
+	case 4:
+		return append(dst, '.',
+			digits10[p1], digits01[p1],
+			digits10[p2], digits01[p2],
+		)
+	case 5:
+		return append(dst, '.',
+			digits10[p1], digits01[p1],
+			digits10[p2], digits01[p2],
+			digits10[p3],
+		)
+	}
+}
+
+func formatBinaryDateTime(src []byte, length uint8) (driver.Value, error) {
+	// length expects the deterministic length of the zero value,
+	// negative time and 100+ hours are automatically added if needed
+	if len(src) == 0 {
+		return zeroDateTime[:length], nil
+	}
+	var dst []byte      // return value
+	var p1, p2, p3 byte // current digit pair
+
+	switch length {
+	case 10, 19, 21, 22, 23, 24, 25, 26:
+	default:
+		t := "DATE"
+		if length > 10 {
+			t += "TIME"
+		}
+		return nil, fmt.Errorf("illegal %s length %d", t, length)
+	}
+	switch len(src) {
+	case 4, 7, 11:
+	default:
+		t := "DATE"
+		if length > 10 {
+			t += "TIME"
+		}
+		return nil, fmt.Errorf("illegal %s packet length %d", t, len(src))
+	}
+	dst = make([]byte, 0, length)
+	// start with the date
+	year := binary.LittleEndian.Uint16(src[:2])
+	pt := year / 100
+	p1 = byte(year - 100*uint16(pt))
+	p2, p3 = src[2], src[3]
+	dst = append(dst,
+		digits10[pt], digits01[pt],
+		digits10[p1], digits01[p1], '-',
+		digits10[p2], digits01[p2], '-',
+		digits10[p3], digits01[p3],
+	)
+	if length == 10 {
+		return dst, nil
+	}
+	if len(src) == 4 {
+		return append(dst, zeroDateTime[10:length]...), nil
+	}
+	dst = append(dst, ' ')
+	p1 = src[4] // hour
+	src = src[5:]
+
+	// p1 is 2-digit hour, src is after hour
+	p2, p3 = src[0], src[1]
+	dst = append(dst,
+		digits10[p1], digits01[p1], ':',
+		digits10[p2], digits01[p2], ':',
+		digits10[p3], digits01[p3],
+	)
+	return appendMicrosecs(dst, src[2:], int(length)-20), nil
+}
+
+func formatBinaryTime(src []byte, length uint8) (driver.Value, error) {
+	// length expects the deterministic length of the zero value,
+	// negative time and 100+ hours are automatically added if needed
+	if len(src) == 0 {
+		return zeroDateTime[11 : 11+length], nil
+	}
+	var dst []byte // return value
+
+	switch length {
+	case
+		8,                      // time (can be up to 10 when negative and 100+ hours)
+		10, 11, 12, 13, 14, 15: // time with fractional seconds
+	default:
+		return nil, fmt.Errorf("illegal TIME length %d", length)
+	}
+	switch len(src) {
+	case 8, 12:
+	default:
+		return nil, fmt.Errorf("invalid TIME packet length %d", len(src))
+	}
+	// +2 to enable negative time and 100+ hours
+	dst = make([]byte, 0, length+2)
+	if src[0] == 1 {
+		dst = append(dst, '-')
+	}
+	days := binary.LittleEndian.Uint32(src[1:5])
+	hours := int64(days)*24 + int64(src[5])
+
+	if hours >= 100 {
+		dst = strconv.AppendInt(dst, hours, 10)
+	} else {
+		dst = append(dst, digits10[hours], digits01[hours])
+	}
+
+	min, sec := src[6], src[7]
+	dst = append(dst, ':',
+		digits10[min], digits01[min], ':',
+		digits10[sec], digits01[sec],
+	)
+	return appendMicrosecs(dst, src[8:], int(length)-9), nil
+}
+
+/******************************************************************************
+*                       Convert from and to bytes                             *
+******************************************************************************/
+
+func uint64ToBytes(n uint64) []byte {
+	return []byte{
+		byte(n),
+		byte(n >> 8),
+		byte(n >> 16),
+		byte(n >> 24),
+		byte(n >> 32),
+		byte(n >> 40),
+		byte(n >> 48),
+		byte(n >> 56),
+	}
+}
+
+func uint64ToString(n uint64) []byte {
+	var a [20]byte
+	i := 20
+
+	// U+0030 = 0
+	// ...
+	// U+0039 = 9
+
+	var q uint64
+	for n >= 10 {
+		i--
+		q = n / 10
+		a[i] = uint8(n-q*10) + 0x30
+		n = q
+	}
+
+	i--
+	a[i] = uint8(n) + 0x30
+
+	return a[i:]
+}
+
+// treats string value as unsigned integer representation
+func stringToInt(b []byte) int {
+	val := 0
+	for i := range b {
+		val *= 10
+		val += int(b[i] - 0x30)
+	}
+	return val
+}
+
+// returns the string read as a bytes slice, wheter the value is NULL,
+// the number of bytes read and an error, in case the string is longer than
+// the input slice
+func readLengthEncodedString(b []byte) ([]byte, bool, int, error) {
+	// Get length
+	num, isNull, n := readLengthEncodedInteger(b)
+	if num < 1 {
+		return b[n:n], isNull, n, nil
+	}
+
+	n += int(num)
+
+	// Check data length
+	if len(b) >= n {
+		return b[n-int(num) : n : n], false, n, nil
+	}
+	return nil, false, n, io.EOF
+}
+
+// returns the number of bytes skipped and an error, in case the string is
+// longer than the input slice
+func skipLengthEncodedString(b []byte) (int, error) {
+	// Get length
+	num, _, n := readLengthEncodedInteger(b)
+	if num < 1 {
+		return n, nil
+	}
+
+	n += int(num)
+
+	// Check data length
+	if len(b) >= n {
+		return n, nil
+	}
+	return n, io.EOF
+}
+
+// returns the number read, whether the value is NULL and the number of bytes read
+func readLengthEncodedInteger(b []byte) (uint64, bool, int) {
+	// See issue #349
+	if len(b) == 0 {
+		return 0, true, 1
+	}
+
+	switch b[0] {
+	// 251: NULL
+	case 0xfb:
+		return 0, true, 1
+
+	// 252: value of following 2
+	case 0xfc:
+		return uint64(b[1]) | uint64(b[2])<<8, false, 3
+
+	// 253: value of following 3
+	case 0xfd:
+		return uint64(b[1]) | uint64(b[2])<<8 | uint64(b[3])<<16, false, 4
+
+	// 254: value of following 8
+	case 0xfe:
+		return uint64(b[1]) | uint64(b[2])<<8 | uint64(b[3])<<16 |
+				uint64(b[4])<<24 | uint64(b[5])<<32 | uint64(b[6])<<40 |
+				uint64(b[7])<<48 | uint64(b[8])<<56,
+			false, 9
+	}
+
+	// 0-250: value of first byte
+	return uint64(b[0]), false, 1
+}
+
+// encodes a uint64 value and appends it to the given bytes slice
+func appendLengthEncodedInteger(b []byte, n uint64) []byte {
+	switch {
+	case n <= 250:
+		return append(b, byte(n))
+
+	case n <= 0xffff:
+		return append(b, 0xfc, byte(n), byte(n>>8))
+
+	case n <= 0xffffff:
+		return append(b, 0xfd, byte(n), byte(n>>8), byte(n>>16))
+	}
+	return append(b, 0xfe, byte(n), byte(n>>8), byte(n>>16), byte(n>>24),
+		byte(n>>32), byte(n>>40), byte(n>>48), byte(n>>56))
+}
+
+// reserveBuffer checks cap(buf) and expand buffer to len(buf) + appendSize.
+// If cap(buf) is not enough, reallocate new buffer.
+func reserveBuffer(buf []byte, appendSize int) []byte {
+	newSize := len(buf) + appendSize
+	if cap(buf) < newSize {
+		// Grow buffer exponentially
+		newBuf := make([]byte, len(buf)*2+appendSize)
+		copy(newBuf, buf)
+		buf = newBuf
+	}
+	return buf[:newSize]
+}
+
+// escapeBytesBackslash escapes []byte with backslashes (\)
+// This escapes the contents of a string (provided as []byte) by adding backslashes before special
+// characters, and turning others into specific escape sequences, such as
+// turning newlines into \n and null bytes into \0.
+// https://github.com/mysql/mysql-server/blob/mysql-5.7.5/mysys/charset.c#L823-L932
+func escapeBytesBackslash(buf, v []byte) []byte {
+	pos := len(buf)
+	buf = reserveBuffer(buf, len(v)*2)
+
+	for _, c := range v {
+		switch c {
+		case '\x00':
+			buf[pos] = '\\'
+			buf[pos+1] = '0'
+			pos += 2
+		case '\n':
+			buf[pos] = '\\'
+			buf[pos+1] = 'n'
+			pos += 2
+		case '\r':
+			buf[pos] = '\\'
+			buf[pos+1] = 'r'
+			pos += 2
+		case '\x1a':
+			buf[pos] = '\\'
+			buf[pos+1] = 'Z'
+			pos += 2
+		case '\'':
+			buf[pos] = '\\'
+			buf[pos+1] = '\''
+			pos += 2
+		case '"':
+			buf[pos] = '\\'
+			buf[pos+1] = '"'
+			pos += 2
+		case '\\':
+			buf[pos] = '\\'
+			buf[pos+1] = '\\'
+			pos += 2
+		default:
+			buf[pos] = c
+			pos++
+		}
+	}
+
+	return buf[:pos]
+}
+
+// escapeStringBackslash is similar to escapeBytesBackslash but for string.
+func escapeStringBackslash(buf []byte, v string) []byte {
+	pos := len(buf)
+	buf = reserveBuffer(buf, len(v)*2)
+
+	for i := 0; i < len(v); i++ {
+		c := v[i]
+		switch c {
+		case '\x00':
+			buf[pos] = '\\'
+			buf[pos+1] = '0'
+			pos += 2
+		case '\n':
+			buf[pos] = '\\'
+			buf[pos+1] = 'n'
+			pos += 2
+		case '\r':
+			buf[pos] = '\\'
+			buf[pos+1] = 'r'
+			pos += 2
+		case '\x1a':
+			buf[pos] = '\\'
+			buf[pos+1] = 'Z'
+			pos += 2
+		case '\'':
+			buf[pos] = '\\'
+			buf[pos+1] = '\''
+			pos += 2
+		case '"':
+			buf[pos] = '\\'
+			buf[pos+1] = '"'
+			pos += 2
+		case '\\':
+			buf[pos] = '\\'
+			buf[pos+1] = '\\'
+			pos += 2
+		default:
+			buf[pos] = c
+			pos++
+		}
+	}
+
+	return buf[:pos]
+}
+
+// escapeBytesQuotes escapes apostrophes in []byte by doubling them up.
+// This escapes the contents of a string by doubling up any apostrophes that
+// it contains. This is used when the NO_BACKSLASH_ESCAPES SQL_MODE is in
+// effect on the server.
+// https://github.com/mysql/mysql-server/blob/mysql-5.7.5/mysys/charset.c#L963-L1038
+func escapeBytesQuotes(buf, v []byte) []byte {
+	pos := len(buf)
+	buf = reserveBuffer(buf, len(v)*2)
+
+	for _, c := range v {
+		if c == '\'' {
+			buf[pos] = '\''
+			buf[pos+1] = '\''
+			pos += 2
+		} else {
+			buf[pos] = c
+			pos++
+		}
+	}
+
+	return buf[:pos]
+}
+
+// escapeStringQuotes is similar to escapeBytesQuotes but for string.
+func escapeStringQuotes(buf []byte, v string) []byte {
+	pos := len(buf)
+	buf = reserveBuffer(buf, len(v)*2)
+
+	for i := 0; i < len(v); i++ {
+		c := v[i]
+		if c == '\'' {
+			buf[pos] = '\''
+			buf[pos+1] = '\''
+			pos += 2
+		} else {
+			buf[pos] = c
+			pos++
+		}
+	}
+
+	return buf[:pos]
+}
+
+/******************************************************************************
+*                               Sync utils                                    *
+******************************************************************************/
+
+// noCopy may be embedded into structs which must not be copied
+// after the first use.
+//
+// See https://github.com/golang/go/issues/8005#issuecomment-190753527
+// for details.
+type noCopy struct{}
+
+// Lock is a no-op used by -copylocks checker from `go vet`.
+func (*noCopy) Lock() {}
+
+// atomicBool is a wrapper around uint32 for usage as a boolean value with
+// atomic access.
+type atomicBool struct {
+	_noCopy noCopy
+	value   uint32
+}
+
+// IsSet returns whether the current boolean value is true
+func (ab *atomicBool) IsSet() bool {
+	return atomic.LoadUint32(&ab.value) > 0
+}
+
+// Set sets the value of the bool regardless of the previous value
+func (ab *atomicBool) Set(value bool) {
+	if value {
+		atomic.StoreUint32(&ab.value, 1)
+	} else {
+		atomic.StoreUint32(&ab.value, 0)
+	}
+}
+
+// TrySet sets the value of the bool and returns whether the value changed
+func (ab *atomicBool) TrySet(value bool) bool {
+	if value {
+		return atomic.SwapUint32(&ab.value, 1) == 0
+	}
+	return atomic.SwapUint32(&ab.value, 0) > 0
+}
+
+// atomicError is a wrapper for atomically accessed error values
+type atomicError struct {
+	_noCopy noCopy
+	value   atomic.Value
+}
+
+// Set sets the error value regardless of the previous value.
+// The value must not be nil
+func (ae *atomicError) Set(value error) {
+	ae.value.Store(value)
+}
+
+// Value returns the current error value
+func (ae *atomicError) Value() error {
+	if v := ae.value.Load(); v != nil {
+		// this will panic if the value doesn't implement the error interface
+		return v.(error)
+	}
+	return nil
+}
+
+func namedValueToValue(named []driver.NamedValue) ([]driver.Value, error) {
+	dargs := make([]driver.Value, len(named))
+	for n, param := range named {
+		if len(param.Name) > 0 {
+			// TODO: support the use of Named Parameters #561
+			return nil, errors.New("mysql: driver does not support the use of Named Parameters")
+		}
+		dargs[n] = param.Value
+	}
+	return dargs, nil
+}
+
+func mapIsolationLevel(level driver.IsolationLevel) (string, error) {
+	switch sql.IsolationLevel(level) {
+	case sql.LevelRepeatableRead:
+		return "REPEATABLE READ", nil
+	case sql.LevelReadCommitted:
+		return "READ COMMITTED", nil
+	case sql.LevelReadUncommitted:
+		return "READ UNCOMMITTED", nil
+	case sql.LevelSerializable:
+		return "SERIALIZABLE", nil
+	default:
+		return "", fmt.Errorf("mysql: unsupported isolation level: %v", level)
+	}
+}

services/tiktak/vendor/github.com/gocraft/dbr/v2/LICENSE

@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2014-2017 Jonathan Novak, Tai-Lin Chu
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

services/tiktak/vendor/github.com/gocraft/dbr/v2/README.md

@@ -0,0 +1,173 @@
+# gocraft/dbr (database records)
+
+[![GoDoc](https://godoc.org/github.com/gocraft/dbr?status.png)](https://godoc.org/github.com/gocraft/dbr)
+[![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Fgocraft%2Fdbr.svg?type=shield)](https://app.fossa.io/projects/git%2Bgithub.com%2Fgocraft%2Fdbr?ref=badge_shield)
+[![Go Report Card](https://goreportcard.com/badge/github.com/gocraft/dbr)](https://goreportcard.com/report/github.com/gocraft/dbr)
+[![CircleCI](https://circleci.com/gh/gocraft/dbr.svg?style=svg)](https://circleci.com/gh/gocraft/dbr)
+
+gocraft/dbr provides additions to Go's database/sql for super fast performance and convenience.
+
+```
+$ go get -u github.com/gocraft/dbr/v2
+```
+
+```go
+import "github.com/gocraft/dbr/v2"
+```
+
+## Driver support
+
+* MySQL
+* PostgreSQL
+* SQLite3
+
+## Examples
+
+See [godoc](https://godoc.org/github.com/gocraft/dbr) for more examples.
+
+### Open connections
+
+```go
+// create a connection (e.g. "postgres", "mysql", or "sqlite3")
+conn, _ := Open("postgres", "...", nil)
+conn.SetMaxOpenConns(10)
+
+// create a session for each business unit of execution (e.g. a web request or goworkers job)
+sess := conn.NewSession(nil)
+
+// create a tx from sessions
+sess.Begin()
+```
+
+### Create and use Tx
+
+```go
+sess := mysqlSession
+tx, err := sess.Begin()
+if err != nil {
+	return
+}
+defer tx.RollbackUnlessCommitted()
+
+// do stuff...
+
+tx.Commit()
+```
+
+### SelectStmt loads data into structs
+
+```go
+// columns are mapped by tag then by field
+type Suggestion struct {
+	ID	int64		// id, will be autoloaded by last insert id
+	Title	NullString	`db:"subject"`	// subjects are called titles now
+	Url	string		`db:"-"`	// ignored
+	secret	string		// ignored
+}
+
+// By default gocraft/dbr converts CamelCase property names to snake_case column_names.
+// You can override this with struct tags, just like with JSON tags.
+// This is especially helpful while migrating from legacy systems.
+var suggestions []Suggestion
+sess := mysqlSession
+sess.Select("*").From("suggestions").Load(&suggestions)
+```
+
+### SelectStmt with where-value interpolation
+
+```go
+// database/sql uses prepared statements, which means each argument
+// in an IN clause needs its own question mark.
+// gocraft/dbr, on the other hand, handles interpolation itself
+// so that you can easily use a single question mark paired with a
+// dynamically sized slice.
+
+sess := mysqlSession
+ids := []int64{1, 2, 3, 4, 5}
+sess.Select("*").From("suggestions").Where("id IN ?", ids)
+```
+
+### SelectStmt with joins
+
+```go
+sess := mysqlSession
+sess.Select("*").From("suggestions").
+	Join("subdomains", "suggestions.subdomain_id = subdomains.id")
+
+sess.Select("*").From("suggestions").
+	LeftJoin("subdomains", "suggestions.subdomain_id = subdomains.id")
+
+// join multiple tables
+sess.Select("*").From("suggestions").
+	Join("subdomains", "suggestions.subdomain_id = subdomains.id").
+	Join("accounts", "subdomains.accounts_id = accounts.id")
+```
+
+### SelectStmt with raw SQL
+
+```go
+SelectBySql("SELECT `title`, `body` FROM `suggestions` ORDER BY `id` ASC LIMIT 10")
+```
+
+### InsertStmt adds data from struct
+
+```go
+type Suggestion struct {
+	ID		int64
+	Title		NullString
+	CreatedAt	time.Time
+}
+sugg := &Suggestion{
+	Title:		NewNullString("Gopher"),
+	CreatedAt:	time.Now(),
+}
+sess := mysqlSession
+sess.InsertInto("suggestions").
+	Columns("title").
+	Record(&sugg).
+	Exec()
+
+// id is set automatically
+fmt.Println(sugg.ID)
+```
+
+### InsertStmt adds data from value
+
+```go
+sess := mysqlSession
+sess.InsertInto("suggestions").
+	Pair("title", "Gopher").
+	Pair("body", "I love go.")
+```
+
+
+## Benchmark (2018-05-11)
+
+```
+BenchmarkLoadValues/sqlx_10-8         	    5000	    407318 ns/op	    3913 B/op	     164 allocs/op
+BenchmarkLoadValues/dbr_10-8          	    5000	    372940 ns/op	    3874 B/op	     123 allocs/op
+BenchmarkLoadValues/sqlx_100-8        	    2000	    584197 ns/op	   30195 B/op	    1428 allocs/op
+BenchmarkLoadValues/dbr_100-8         	    3000	    558852 ns/op	   22965 B/op	     937 allocs/op
+BenchmarkLoadValues/sqlx_1000-8       	    1000	   2319101 ns/op	  289339 B/op	   14031 allocs/op
+BenchmarkLoadValues/dbr_1000-8        	    1000	   2310441 ns/op	  210092 B/op	    9040 allocs/op
+BenchmarkLoadValues/sqlx_10000-8      	     100	  17004716 ns/op	 3193997 B/op	  140043 allocs/op
+BenchmarkLoadValues/dbr_10000-8       	     100	  16150062 ns/op	 2394698 B/op	   90051 allocs/op
+BenchmarkLoadValues/sqlx_100000-8     	      10	 170068209 ns/op	31679944 B/op	 1400053 allocs/op
+BenchmarkLoadValues/dbr_100000-8      	      10	 147202536 ns/op	23680625 B/op	  900061 allocs/op
+```
+
+## Thanks & Authors
+Inspiration from these excellent libraries:
+* [sqlx](https://github.com/jmoiron/sqlx) - various useful tools and utils for interacting with database/sql.
+* [Squirrel](https://github.com/lann/squirrel) - simple fluent query builder.
+
+Authors:
+* Jonathan Novak -- [https://github.com/cypriss](https://github.com/cypriss)
+* Tai-Lin Chu -- [https://github.com/taylorchu](https://github.com/taylorchu)
+* Sponsored by [UserVoice](https://eng.uservoice.com)
+
+Contributors:
+* Paul Bergeron -- [https://github.com/dinedal](https://github.com/dinedal) - SQLite dialect
+
+## License
+[![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Fgocraft%2Fdbr.svg?type=large)](https://app.fossa.io/projects/git%2Bgithub.com%2Fgocraft%2Fdbr?ref=badge_large)

services/tiktak/vendor/github.com/gocraft/dbr/v2/README.md.tpl

@@ -0,0 +1,90 @@
+# gocraft/dbr (database records)
+
+[![GoDoc](https://godoc.org/github.com/gocraft/dbr?status.png)](https://godoc.org/github.com/gocraft/dbr)
+[![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Fgocraft%2Fdbr.svg?type=shield)](https://app.fossa.io/projects/git%2Bgithub.com%2Fgocraft%2Fdbr?ref=badge_shield)
+[![Go Report Card](https://goreportcard.com/badge/github.com/gocraft/dbr)](https://goreportcard.com/report/github.com/gocraft/dbr)
+[![CircleCI](https://circleci.com/gh/gocraft/dbr.svg?style=svg)](https://circleci.com/gh/gocraft/dbr)
+
+gocraft/dbr provides additions to Go's database/sql for super fast performance and convenience.
+
+```
+$ go get -u github.com/gocraft/dbr/v2
+```
+
+```go
+import "github.com/gocraft/dbr/v2"
+```
+
+## Driver support
+
+* MySQL
+* PostgreSQL
+* SQLite3
+
+## Examples
+
+See [godoc](https://godoc.org/github.com/gocraft/dbr) for more examples.
+
+### Open connections
+
+{{ "ExampleOpen" | example }}
+
+### Create and use Tx
+
+{{ "ExampleTx" | example }}
+
+### SelectStmt loads data into structs
+
+{{ "ExampleSelectStmt_Load" | example }}
+
+### SelectStmt with where-value interpolation
+
+{{ "ExampleSelectStmt_Where" | example }}
+
+### SelectStmt with joins
+
+{{ "ExampleSelectStmt_Join" | example }}
+
+### SelectStmt with raw SQL
+
+{{ "ExampleSelectBySql" | example }}
+
+### InsertStmt adds data from struct
+
+{{ "ExampleInsertStmt_Record" | example }}
+
+### InsertStmt adds data from value
+
+{{ "ExampleInsertStmt_Pair" | example }}
+
+
+## Benchmark (2018-05-11)
+
+```
+BenchmarkLoadValues/sqlx_10-8         	    5000	    407318 ns/op	    3913 B/op	     164 allocs/op
+BenchmarkLoadValues/dbr_10-8          	    5000	    372940 ns/op	    3874 B/op	     123 allocs/op
+BenchmarkLoadValues/sqlx_100-8        	    2000	    584197 ns/op	   30195 B/op	    1428 allocs/op
+BenchmarkLoadValues/dbr_100-8         	    3000	    558852 ns/op	   22965 B/op	     937 allocs/op
+BenchmarkLoadValues/sqlx_1000-8       	    1000	   2319101 ns/op	  289339 B/op	   14031 allocs/op
+BenchmarkLoadValues/dbr_1000-8        	    1000	   2310441 ns/op	  210092 B/op	    9040 allocs/op
+BenchmarkLoadValues/sqlx_10000-8      	     100	  17004716 ns/op	 3193997 B/op	  140043 allocs/op
+BenchmarkLoadValues/dbr_10000-8       	     100	  16150062 ns/op	 2394698 B/op	   90051 allocs/op
+BenchmarkLoadValues/sqlx_100000-8     	      10	 170068209 ns/op	31679944 B/op	 1400053 allocs/op
+BenchmarkLoadValues/dbr_100000-8      	      10	 147202536 ns/op	23680625 B/op	  900061 allocs/op
+```
+
+## Thanks & Authors
+Inspiration from these excellent libraries:
+* [sqlx](https://github.com/jmoiron/sqlx) - various useful tools and utils for interacting with database/sql.
+* [Squirrel](https://github.com/lann/squirrel) - simple fluent query builder.
+
+Authors:
+* Jonathan Novak -- [https://github.com/cypriss](https://github.com/cypriss)
+* Tai-Lin Chu -- [https://github.com/taylorchu](https://github.com/taylorchu)
+* Sponsored by [UserVoice](https://eng.uservoice.com)
+
+Contributors:
+* Paul Bergeron -- [https://github.com/dinedal](https://github.com/dinedal) - SQLite dialect
+
+## License
+[![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Fgocraft%2Fdbr.svg?type=large)](https://app.fossa.io/projects/git%2Bgithub.com%2Fgocraft%2Fdbr?ref=badge_large)