feat: added http gateway for grpc

.env.template

@@ -3,4 +3,6 @@
 
 GRPC_PORT=50051
 GRPC_ENABLE_REFLECTION=false
+HTTP_HANDLER_ENABLE=false
+HTTP_PORT=8080
 LOG_LEVEL=info

Makefile

@@ -26,7 +26,10 @@ generate:
 
 gen: generate
 
-protoc: generate
+generate-gw:
+	$(PROTOC) --version || (echo "protoc not found, install protoc"; exit 1)
+	$(PROTOC) --grpc-gateway_out=$(PROTO_OUT) --grpc-gateway_opt generate_unbound_methods=true \
+		$(PROTO_FILE)
 
 test:
 	$(GOTEST) ./...

README.md

@@ -35,6 +35,8 @@ And setup env vars according to your needs.
 ```bash
 GRPC_PORT=50051              # gRPC server port
 GRPC_ENABLE_REFLECTION=false # whether to enable gRPC reflection or not
+HTTP_HANDLER_ENABLE=false    # whether to enable HTTP gateway or not
+HTTP_PORT=8080               # HTTP gateway port
 LOG_LEVEL=info               # logging severity (debug, info, warn, error)
 ```
 

go.mod

@@ -8,12 +8,23 @@ require (
 	github.com/google/uuid v1.6.0
 	github.com/joho/godotenv v1.5.1
 	google.golang.org/grpc v1.76.0
+	google.golang.org/protobuf v1.36.10
 )
 
 require (
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.3 // indirect
+	go.yaml.in/yaml/v3 v3.0.4 // indirect
 	golang.org/x/net v0.42.0 // indirect
 	golang.org/x/sys v0.34.0 // indirect
-	golang.org/x/text v0.27.0 // indirect
+	golang.org/x/text v0.29.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20250804133106-a7a43d27e69b // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20250929231259-57b25ae835d4 // indirect
-	google.golang.org/protobuf v1.36.10 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20250929231259-57b25ae835d4 // indirect
+	google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.5.1 // indirect
+)
+
+tool (
+	github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-grpc-gateway
+	github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-openapiv2
+	google.golang.org/grpc/cmd/protoc-gen-go-grpc
+	google.golang.org/protobuf/cmd/protoc-gen-go
 )

go.sum

@@ -8,6 +8,8 @@ github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
 github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.3 h1:NmZ1PKzSTQbuGHw9DGPFomqkkLWMC+vZCkfs+FHv1Vg=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.3/go.mod h1:zQrxl1YP88HQlA6i9c63DSVPFklWpGX4OWAc9bFuaH4=
 github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
 github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
 go.opentelemetry.io/auto/sdk v1.1.0 h1:cH53jehLUN6UFLY71z+NDOiNJqDdPRaXzTel0sJySYA=
@@ -22,17 +24,28 @@ go.opentelemetry.io/otel/sdk/metric v1.37.0 h1:90lI228XrB9jCMuSdA0673aubgRobVZFh
 go.opentelemetry.io/otel/sdk/metric v1.37.0/go.mod h1:cNen4ZWfiD37l5NhS+Keb5RXVWZWpRE+9WyVCpbo5ps=
 go.opentelemetry.io/otel/trace v1.37.0 h1:HLdcFNbRQBE2imdSEgm/kwqmQj1Or1l/7bW6mxVK7z4=
 go.opentelemetry.io/otel/trace v1.37.0/go.mod h1:TlgrlQ+PtQO5XFerSPUYG0JSgGyryXewPGyayAWSBS0=
+go.yaml.in/yaml/v3 v3.0.4 h1:tfq32ie2Jv2UxXFdLJdh3jXuOzWiL1fo0bu/FbuKpbc=
+go.yaml.in/yaml/v3 v3.0.4/go.mod h1:DhzuOOF2ATzADvBadXxruRBLzYTpT36CKvDb3+aBEFg=
 golang.org/x/net v0.42.0 h1:jzkYrhi3YQWD6MLBJcsklgQsoAcw89EcZbJw8Z614hs=
 golang.org/x/net v0.42.0/go.mod h1:FF1RA5d3u7nAYA4z2TkclSCKh68eSXtiFwcWQpPXdt8=
 golang.org/x/sys v0.34.0 h1:H5Y5sJ2L2JRdyv7ROF1he/lPdvFsd0mJHFw2ThKHxLA=
 golang.org/x/sys v0.34.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
 golang.org/x/text v0.27.0 h1:4fGWRpyh641NLlecmyl4LOe6yDdfaYNrGb2zdfo4JV4=
 golang.org/x/text v0.27.0/go.mod h1:1D28KMCvyooCX9hBiosv5Tz/+YLxj0j7XhWjpSUF7CU=
+golang.org/x/text v0.29.0 h1:1neNs90w9YzJ9BocxfsQNHKuAT4pkghyXc4nhZ6sJvk=
+golang.org/x/text v0.29.0/go.mod h1:7MhJOA9CD2qZyOKYazxdYMF85OwPdEr9jTtBpO7ydH4=
 gonum.org/v1/gonum v0.16.0 h1:5+ul4Swaf3ESvrOnidPp4GZbzf0mxVQpDCYUQE7OJfk=
 gonum.org/v1/gonum v0.16.0/go.mod h1:fef3am4MQ93R2HHpKnLk4/Tbh/s0+wqD5nfa6Pnwy4E=
+google.golang.org/genproto/googleapis/api v0.0.0-20250929231259-57b25ae835d4 h1:8XJ4pajGwOlasW+L13MnEGA8W4115jJySQtVfS2/IBU=
+google.golang.org/genproto/googleapis/api v0.0.0-20250929231259-57b25ae835d4/go.mod h1:NnuHhy+bxcg30o7FnVAZbXsPHUDQ9qKWAQKCD7VxFtk=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20250804133106-a7a43d27e69b h1:zPKJod4w6F1+nRGDI9ubnXYhU9NSWoFAijkHkUXeTK8=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20250804133106-a7a43d27e69b/go.mod h1:qQ0YXyHHx3XkvlzUtpXDkS29lDSafHMZBAZDc03LQ3A=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20250929231259-57b25ae835d4 h1:i8QOKZfYg6AbGVZzUAY3LrNWCKF8O6zFisU9Wl9RER4=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20250929231259-57b25ae835d4/go.mod h1:HSkG/KdJWusxU1F6CNrwNDjBMgisKxGnc5dAZfT0mjQ=
 google.golang.org/grpc v1.76.0 h1:UnVkv1+uMLYXoIz6o7chp59WfQUYA2ex/BXQ9rHZu7A=
 google.golang.org/grpc v1.76.0/go.mod h1:Ju12QI8M6iQJtbcsV+awF5a4hfJMLi4X0JLo94ULZ6c=
+google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.5.1 h1:F29+wU6Ee6qgu9TddPgooOdaqsxTMunOoj8KA5yuS5A=
+google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.5.1/go.mod h1:5KF+wpkbTSbGcR9zteSqZV6fqFOWBl4Yde8En8MryZA=
 google.golang.org/protobuf v1.36.10 h1:AYd7cD/uASjIL6Q9LiTjz8JLcrh/88q5UObnmY3aOOE=
 google.golang.org/protobuf v1.36.10/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

internal/config/config.go

@@ -11,38 +11,44 @@ import (
 type Config struct {
 	GRPCPort             int
 	GRPCEnableReflection bool
+	EnableHTTPHandler    bool
+	HTTPPort             int
 	LogLevel             string
 }
 
 func Load() (*Config, error) {
-	if err := godotenv.Load(); err != nil {
+	_ = godotenv.Load()
-		log.Printf("Warning: .env file not found: %v", err)
-	}
 
-	config := &Config{}
+	return &Config{
-
+		GRPCPort:             mustGetInt("GRPC_PORT", 50051), //nolint:mnd // false-positive
-	portStr := getEnv("GRPC_PORT", "50051")
+		GRPCEnableReflection: mustGetBool("GRPC_ENABLE_REFLECTION", false),
-	port, err := strconv.Atoi(portStr)
+		EnableHTTPHandler:    mustGetBool("HTTP_HANDLER_ENABLE", false),
-	if err != nil {
+		HTTPPort:             mustGetInt("HTTP_PORT", 8080), //nolint:mnd // false-positive
-		return nil, err
+		LogLevel:             getEnv("LOG_LEVEL", "info"),
-	}
+	}, nil
-	config.GRPCPort = port
-
-	enableReflectionStr := getEnv("GRPC_ENABLE_REFLECTION", "false")
-	enableReflection, err := strconv.ParseBool(enableReflectionStr)
-	if err != nil {
-		return nil, err
-	}
-	config.GRPCEnableReflection = enableReflection
-
-	config.LogLevel = getEnv("LOG_LEVEL", "info")
-
-	return config, nil
 }
 
-func getEnv(key, defaultValue string) string {
+func getEnv(key, def string) string {
-	if value := os.Getenv(key); value != "" {
+	if val := os.Getenv(key); val != "" {
-		return value
+		return val
 	}
-	return defaultValue
+	return def
+}
+
+func mustGetInt(key string, def int) int {
+	val := getEnv(key, strconv.Itoa(def))
+	n, err := strconv.Atoi(val)
+	if err != nil {
+		log.Fatalf("invalid int for %s: %v", key, err)
+	}
+	return n
+}
+
+func mustGetBool(key string, def bool) bool {
+	val := getEnv(key, strconv.FormatBool(def))
+	b, err := strconv.ParseBool(val)
+	if err != nil {
+		log.Fatalf("invalid bool for %s: %v", key, err)
+	}
+	return b
 }

internal/server/server.go

@@ -1,9 +1,11 @@
 package server
 
 import (
+	"context"
 	"fmt"
 	"log"
 	"net"
+	"net/http"
 
 	"orderservice/internal/config"
 	"orderservice/internal/interceptor"
@@ -14,7 +16,9 @@ import (
 
 	pb "orderservice/pkg/api/order"
 
+	"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
 	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
 	"google.golang.org/grpc/reflection"
 )
 
@@ -37,6 +41,22 @@ func New(cfg *config.Config) *Server {
 	}
 }
 
+func runHTTPHandler(s *Server, grpcServerEndpoint *string) error {
+	ctx := context.Background()
+	ctx, cancel := context.WithCancel(ctx)
+	defer cancel()
+
+	mux := runtime.NewServeMux()
+	opts := []grpc.DialOption{grpc.WithTransportCredentials(insecure.NewCredentials())}
+	err := pb.RegisterOrderServiceHandlerFromEndpoint(ctx, mux, *grpcServerEndpoint, opts)
+	if err != nil {
+		return err
+	}
+
+	addr := fmt.Sprintf(":%d", s.config.HTTPPort)
+	return http.ListenAndServe(addr, mux)
+}
+
 func (s *Server) RegisterServices() {
 	repo := orderInMemory.NewOrderRepository()
 	orderService := service.NewOrderService(repo)
@@ -57,6 +77,15 @@ func (s *Server) Start() error {
 		return fmt.Errorf("failed to listen: %w", err)
 	}
 
+	if s.config.EnableHTTPHandler {
+		go func() {
+			log.Printf("Starting HTTP gateway on port %d", s.config.HTTPPort)
+			if err := runHTTPHandler(s, &addr); err != nil {
+				log.Printf("HTTP gateway failed: %v", err)
+			}
+		}()
+	}
+
 	log.Printf("Starting gRPC server on port %d", s.config.GRPCPort)
 
 	if err := s.grpcServer.Serve(lis); err != nil {

pkg/api/order/order.pb.gw.go

@@ -0,0 +1,421 @@
+// Code generated by protoc-gen-grpc-gateway. DO NOT EDIT.
+// source: api/proto/order.proto
+
+/*
+Package order is a reverse proxy.
+
+It translates gRPC into RESTful JSON APIs.
+*/
+package order
+
+import (
+	"context"
+	"errors"
+	"io"
+	"net/http"
+
+	"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
+	"github.com/grpc-ecosystem/grpc-gateway/v2/utilities"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/status"
+	"google.golang.org/protobuf/proto"
+)
+
+// Suppress "imported and not used" errors
+var (
+	_ codes.Code
+	_ io.Reader
+	_ status.Status
+	_ = errors.New
+	_ = runtime.String
+	_ = utilities.NewDoubleArray
+	_ = metadata.Join
+)
+
+func request_OrderService_CreateOrder_0(ctx context.Context, marshaler runtime.Marshaler, client OrderServiceClient, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var (
+		protoReq CreateOrderRequest
+		metadata runtime.ServerMetadata
+	)
+	if err := marshaler.NewDecoder(req.Body).Decode(&protoReq); err != nil && !errors.Is(err, io.EOF) {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+	if req.Body != nil {
+		_, _ = io.Copy(io.Discard, req.Body)
+	}
+	msg, err := client.CreateOrder(ctx, &protoReq, grpc.Header(&metadata.HeaderMD), grpc.Trailer(&metadata.TrailerMD))
+	return msg, metadata, err
+}
+
+func local_request_OrderService_CreateOrder_0(ctx context.Context, marshaler runtime.Marshaler, server OrderServiceServer, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var (
+		protoReq CreateOrderRequest
+		metadata runtime.ServerMetadata
+	)
+	if err := marshaler.NewDecoder(req.Body).Decode(&protoReq); err != nil && !errors.Is(err, io.EOF) {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+	msg, err := server.CreateOrder(ctx, &protoReq)
+	return msg, metadata, err
+}
+
+func request_OrderService_GetOrder_0(ctx context.Context, marshaler runtime.Marshaler, client OrderServiceClient, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var (
+		protoReq GetOrderRequest
+		metadata runtime.ServerMetadata
+	)
+	if err := marshaler.NewDecoder(req.Body).Decode(&protoReq); err != nil && !errors.Is(err, io.EOF) {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+	if req.Body != nil {
+		_, _ = io.Copy(io.Discard, req.Body)
+	}
+	msg, err := client.GetOrder(ctx, &protoReq, grpc.Header(&metadata.HeaderMD), grpc.Trailer(&metadata.TrailerMD))
+	return msg, metadata, err
+}
+
+func local_request_OrderService_GetOrder_0(ctx context.Context, marshaler runtime.Marshaler, server OrderServiceServer, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var (
+		protoReq GetOrderRequest
+		metadata runtime.ServerMetadata
+	)
+	if err := marshaler.NewDecoder(req.Body).Decode(&protoReq); err != nil && !errors.Is(err, io.EOF) {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+	msg, err := server.GetOrder(ctx, &protoReq)
+	return msg, metadata, err
+}
+
+func request_OrderService_UpdateOrder_0(ctx context.Context, marshaler runtime.Marshaler, client OrderServiceClient, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var (
+		protoReq UpdateOrderRequest
+		metadata runtime.ServerMetadata
+	)
+	if err := marshaler.NewDecoder(req.Body).Decode(&protoReq); err != nil && !errors.Is(err, io.EOF) {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+	if req.Body != nil {
+		_, _ = io.Copy(io.Discard, req.Body)
+	}
+	msg, err := client.UpdateOrder(ctx, &protoReq, grpc.Header(&metadata.HeaderMD), grpc.Trailer(&metadata.TrailerMD))
+	return msg, metadata, err
+}
+
+func local_request_OrderService_UpdateOrder_0(ctx context.Context, marshaler runtime.Marshaler, server OrderServiceServer, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var (
+		protoReq UpdateOrderRequest
+		metadata runtime.ServerMetadata
+	)
+	if err := marshaler.NewDecoder(req.Body).Decode(&protoReq); err != nil && !errors.Is(err, io.EOF) {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+	msg, err := server.UpdateOrder(ctx, &protoReq)
+	return msg, metadata, err
+}
+
+func request_OrderService_DeleteOrder_0(ctx context.Context, marshaler runtime.Marshaler, client OrderServiceClient, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var (
+		protoReq DeleteOrderRequest
+		metadata runtime.ServerMetadata
+	)
+	if err := marshaler.NewDecoder(req.Body).Decode(&protoReq); err != nil && !errors.Is(err, io.EOF) {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+	if req.Body != nil {
+		_, _ = io.Copy(io.Discard, req.Body)
+	}
+	msg, err := client.DeleteOrder(ctx, &protoReq, grpc.Header(&metadata.HeaderMD), grpc.Trailer(&metadata.TrailerMD))
+	return msg, metadata, err
+}
+
+func local_request_OrderService_DeleteOrder_0(ctx context.Context, marshaler runtime.Marshaler, server OrderServiceServer, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var (
+		protoReq DeleteOrderRequest
+		metadata runtime.ServerMetadata
+	)
+	if err := marshaler.NewDecoder(req.Body).Decode(&protoReq); err != nil && !errors.Is(err, io.EOF) {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+	msg, err := server.DeleteOrder(ctx, &protoReq)
+	return msg, metadata, err
+}
+
+func request_OrderService_ListOrders_0(ctx context.Context, marshaler runtime.Marshaler, client OrderServiceClient, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var (
+		protoReq ListOrdersRequest
+		metadata runtime.ServerMetadata
+	)
+	if err := marshaler.NewDecoder(req.Body).Decode(&protoReq); err != nil && !errors.Is(err, io.EOF) {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+	if req.Body != nil {
+		_, _ = io.Copy(io.Discard, req.Body)
+	}
+	msg, err := client.ListOrders(ctx, &protoReq, grpc.Header(&metadata.HeaderMD), grpc.Trailer(&metadata.TrailerMD))
+	return msg, metadata, err
+}
+
+func local_request_OrderService_ListOrders_0(ctx context.Context, marshaler runtime.Marshaler, server OrderServiceServer, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var (
+		protoReq ListOrdersRequest
+		metadata runtime.ServerMetadata
+	)
+	if err := marshaler.NewDecoder(req.Body).Decode(&protoReq); err != nil && !errors.Is(err, io.EOF) {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+	msg, err := server.ListOrders(ctx, &protoReq)
+	return msg, metadata, err
+}
+
+// RegisterOrderServiceHandlerServer registers the http handlers for service OrderService to "mux".
+// UnaryRPC     :call OrderServiceServer directly.
+// StreamingRPC :currently unsupported pending https://github.com/grpc/grpc-go/issues/906.
+// Note that using this registration option will cause many gRPC library features to stop working. Consider using RegisterOrderServiceHandlerFromEndpoint instead.
+// GRPC interceptors will not work for this type of registration. To use interceptors, you must use the "runtime.WithMiddlewares" option in the "runtime.NewServeMux" call.
+func RegisterOrderServiceHandlerServer(ctx context.Context, mux *runtime.ServeMux, server OrderServiceServer) error {
+	mux.Handle(http.MethodPost, pattern_OrderService_CreateOrder_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		var stream runtime.ServerTransportStream
+		ctx = grpc.NewContextWithServerTransportStream(ctx, &stream)
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		annotatedContext, err := runtime.AnnotateIncomingContext(ctx, mux, req, "/order.OrderService/CreateOrder", runtime.WithHTTPPathPattern("/order.OrderService/CreateOrder"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := local_request_OrderService_CreateOrder_0(annotatedContext, inboundMarshaler, server, req, pathParams)
+		md.HeaderMD, md.TrailerMD = metadata.Join(md.HeaderMD, stream.Header()), metadata.Join(md.TrailerMD, stream.Trailer())
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		forward_OrderService_CreateOrder_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+	})
+	mux.Handle(http.MethodPost, pattern_OrderService_GetOrder_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		var stream runtime.ServerTransportStream
+		ctx = grpc.NewContextWithServerTransportStream(ctx, &stream)
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		annotatedContext, err := runtime.AnnotateIncomingContext(ctx, mux, req, "/order.OrderService/GetOrder", runtime.WithHTTPPathPattern("/order.OrderService/GetOrder"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := local_request_OrderService_GetOrder_0(annotatedContext, inboundMarshaler, server, req, pathParams)
+		md.HeaderMD, md.TrailerMD = metadata.Join(md.HeaderMD, stream.Header()), metadata.Join(md.TrailerMD, stream.Trailer())
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		forward_OrderService_GetOrder_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+	})
+	mux.Handle(http.MethodPost, pattern_OrderService_UpdateOrder_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		var stream runtime.ServerTransportStream
+		ctx = grpc.NewContextWithServerTransportStream(ctx, &stream)
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		annotatedContext, err := runtime.AnnotateIncomingContext(ctx, mux, req, "/order.OrderService/UpdateOrder", runtime.WithHTTPPathPattern("/order.OrderService/UpdateOrder"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := local_request_OrderService_UpdateOrder_0(annotatedContext, inboundMarshaler, server, req, pathParams)
+		md.HeaderMD, md.TrailerMD = metadata.Join(md.HeaderMD, stream.Header()), metadata.Join(md.TrailerMD, stream.Trailer())
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		forward_OrderService_UpdateOrder_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+	})
+	mux.Handle(http.MethodPost, pattern_OrderService_DeleteOrder_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		var stream runtime.ServerTransportStream
+		ctx = grpc.NewContextWithServerTransportStream(ctx, &stream)
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		annotatedContext, err := runtime.AnnotateIncomingContext(ctx, mux, req, "/order.OrderService/DeleteOrder", runtime.WithHTTPPathPattern("/order.OrderService/DeleteOrder"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := local_request_OrderService_DeleteOrder_0(annotatedContext, inboundMarshaler, server, req, pathParams)
+		md.HeaderMD, md.TrailerMD = metadata.Join(md.HeaderMD, stream.Header()), metadata.Join(md.TrailerMD, stream.Trailer())
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		forward_OrderService_DeleteOrder_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+	})
+	mux.Handle(http.MethodPost, pattern_OrderService_ListOrders_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		var stream runtime.ServerTransportStream
+		ctx = grpc.NewContextWithServerTransportStream(ctx, &stream)
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		annotatedContext, err := runtime.AnnotateIncomingContext(ctx, mux, req, "/order.OrderService/ListOrders", runtime.WithHTTPPathPattern("/order.OrderService/ListOrders"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := local_request_OrderService_ListOrders_0(annotatedContext, inboundMarshaler, server, req, pathParams)
+		md.HeaderMD, md.TrailerMD = metadata.Join(md.HeaderMD, stream.Header()), metadata.Join(md.TrailerMD, stream.Trailer())
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		forward_OrderService_ListOrders_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+	})
+
+	return nil
+}
+
+// RegisterOrderServiceHandlerFromEndpoint is same as RegisterOrderServiceHandler but
+// automatically dials to "endpoint" and closes the connection when "ctx" gets done.
+func RegisterOrderServiceHandlerFromEndpoint(ctx context.Context, mux *runtime.ServeMux, endpoint string, opts []grpc.DialOption) (err error) {
+	conn, err := grpc.NewClient(endpoint, opts...)
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if err != nil {
+			if cerr := conn.Close(); cerr != nil {
+				grpclog.Errorf("Failed to close conn to %s: %v", endpoint, cerr)
+			}
+			return
+		}
+		go func() {
+			<-ctx.Done()
+			if cerr := conn.Close(); cerr != nil {
+				grpclog.Errorf("Failed to close conn to %s: %v", endpoint, cerr)
+			}
+		}()
+	}()
+	return RegisterOrderServiceHandler(ctx, mux, conn)
+}
+
+// RegisterOrderServiceHandler registers the http handlers for service OrderService to "mux".
+// The handlers forward requests to the grpc endpoint over "conn".
+func RegisterOrderServiceHandler(ctx context.Context, mux *runtime.ServeMux, conn *grpc.ClientConn) error {
+	return RegisterOrderServiceHandlerClient(ctx, mux, NewOrderServiceClient(conn))
+}
+
+// RegisterOrderServiceHandlerClient registers the http handlers for service OrderService
+// to "mux". The handlers forward requests to the grpc endpoint over the given implementation of "OrderServiceClient".
+// Note: the gRPC framework executes interceptors within the gRPC handler. If the passed in "OrderServiceClient"
+// doesn't go through the normal gRPC flow (creating a gRPC client etc.) then it will be up to the passed in
+// "OrderServiceClient" to call the correct interceptors. This client ignores the HTTP middlewares.
+func RegisterOrderServiceHandlerClient(ctx context.Context, mux *runtime.ServeMux, client OrderServiceClient) error {
+	mux.Handle(http.MethodPost, pattern_OrderService_CreateOrder_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		annotatedContext, err := runtime.AnnotateContext(ctx, mux, req, "/order.OrderService/CreateOrder", runtime.WithHTTPPathPattern("/order.OrderService/CreateOrder"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := request_OrderService_CreateOrder_0(annotatedContext, inboundMarshaler, client, req, pathParams)
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		forward_OrderService_CreateOrder_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+	})
+	mux.Handle(http.MethodPost, pattern_OrderService_GetOrder_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		annotatedContext, err := runtime.AnnotateContext(ctx, mux, req, "/order.OrderService/GetOrder", runtime.WithHTTPPathPattern("/order.OrderService/GetOrder"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := request_OrderService_GetOrder_0(annotatedContext, inboundMarshaler, client, req, pathParams)
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		forward_OrderService_GetOrder_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+	})
+	mux.Handle(http.MethodPost, pattern_OrderService_UpdateOrder_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		annotatedContext, err := runtime.AnnotateContext(ctx, mux, req, "/order.OrderService/UpdateOrder", runtime.WithHTTPPathPattern("/order.OrderService/UpdateOrder"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := request_OrderService_UpdateOrder_0(annotatedContext, inboundMarshaler, client, req, pathParams)
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		forward_OrderService_UpdateOrder_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+	})
+	mux.Handle(http.MethodPost, pattern_OrderService_DeleteOrder_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		annotatedContext, err := runtime.AnnotateContext(ctx, mux, req, "/order.OrderService/DeleteOrder", runtime.WithHTTPPathPattern("/order.OrderService/DeleteOrder"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := request_OrderService_DeleteOrder_0(annotatedContext, inboundMarshaler, client, req, pathParams)
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		forward_OrderService_DeleteOrder_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+	})
+	mux.Handle(http.MethodPost, pattern_OrderService_ListOrders_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		annotatedContext, err := runtime.AnnotateContext(ctx, mux, req, "/order.OrderService/ListOrders", runtime.WithHTTPPathPattern("/order.OrderService/ListOrders"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := request_OrderService_ListOrders_0(annotatedContext, inboundMarshaler, client, req, pathParams)
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		forward_OrderService_ListOrders_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+	})
+	return nil
+}
+
+var (
+	pattern_OrderService_CreateOrder_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"order.OrderService", "CreateOrder"}, ""))
+	pattern_OrderService_GetOrder_0    = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"order.OrderService", "GetOrder"}, ""))
+	pattern_OrderService_UpdateOrder_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"order.OrderService", "UpdateOrder"}, ""))
+	pattern_OrderService_DeleteOrder_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"order.OrderService", "DeleteOrder"}, ""))
+	pattern_OrderService_ListOrders_0  = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"order.OrderService", "ListOrders"}, ""))
+)
+
+var (
+	forward_OrderService_CreateOrder_0 = runtime.ForwardResponseMessage
+	forward_OrderService_GetOrder_0    = runtime.ForwardResponseMessage
+	forward_OrderService_UpdateOrder_0 = runtime.ForwardResponseMessage
+	forward_OrderService_DeleteOrder_0 = runtime.ForwardResponseMessage
+	forward_OrderService_ListOrders_0  = runtime.ForwardResponseMessage
+)