add auth

internal/lms/gateway/gateway.go

@@ -0,0 +1,58 @@
+package gateway
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"net"
+	"net/http"
+	"time"
+
+	authPb "datarush/pkg/api/auth"
+	orderPb "datarush/pkg/api/order"
+
+	"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
+)
+
+const (
+	httpReadTimeout  = 10 * time.Second
+	httpWriteTimeout = 10 * time.Second
+	httpIdleTimeout  = 60 * time.Second
+)
+
+func StartGateway(grpcPort, httpPort int, authGrpcAddr string) error {
+	ctx := context.Background()
+	ctx, cancel := context.WithCancel(ctx)
+	defer cancel()
+
+	gwmux := runtime.NewServeMux()
+	opts := []grpc.DialOption{grpc.WithTransportCredentials(insecure.NewCredentials())}
+
+	// Register order service
+	grpcServerAddr := fmt.Sprintf("localhost:%d", grpcPort)
+	if err := orderPb.RegisterOrderServiceHandlerFromEndpoint(ctx, gwmux, grpcServerAddr, opts); err != nil {
+		return fmt.Errorf("failed to register order service: %w", err)
+	}
+
+	// Register auth service
+	if err := authPb.RegisterAuthServiceHandlerFromEndpoint(ctx, gwmux, authGrpcAddr, opts); err != nil {
+		return fmt.Errorf("failed to register auth service: %w", err)
+	}
+
+	srv := &http.Server{
+		Addr:         fmt.Sprintf(":%d", httpPort),
+		Handler:      gwmux,
+		ReadTimeout:  httpReadTimeout,
+		WriteTimeout: httpWriteTimeout,
+		IdleTimeout:  httpIdleTimeout,
+	}
+
+	log.Printf("starting gRPC-Gateway on port %d", httpPort)
+	return srv.ListenAndServe()
+}
+
+func GetGRPCListener(port int) (net.Listener, error) {
+	return net.Listen("tcp", fmt.Sprintf(":%d", port))
+}