snapshot of https://github.com/grpc/grpc-go.git (master, 2026-09-15; blobs > 131072B omitted)

examples/features/reflection/README.md

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+# Reflection
+
+This example shows how reflection can be registered on a gRPC server.
+
+See
+https://github.com/grpc/grpc-go/blob/master/Documentation/server-reflection-tutorial.md
+for a tutorial.
+
+
+# Try it
+
+```go
+go run server/main.go
+```
+
+There are multiple existing reflection clients.
+
+To use `gRPC CLI`, follow
+https://github.com/grpc/grpc-go/blob/master/Documentation/server-reflection-tutorial.md#grpc-cli.
+
+To use `grpcurl`, see https://github.com/fullstorydev/grpcurl.

examples/features/reflection/server/main.go

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+/*
+ *
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Binary server demonstrates how to register multiple services and enable
+// client discovery.
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"log"
+	"net"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/reflection"
+
+	ecpb "google.golang.org/grpc/examples/features/proto/echo"
+	hwpb "google.golang.org/grpc/examples/helloworld/helloworld"
+)
+
+var port = flag.Int("port", 50051, "the port to serve on")
+
+// hwServer is used to implement helloworld.GreeterServer.
+type hwServer struct {
+	hwpb.UnimplementedGreeterServer
+}
+
+// SayHello implements helloworld.GreeterServer
+func (s *hwServer) SayHello(_ context.Context, in *hwpb.HelloRequest) (*hwpb.HelloReply, error) {
+	return &hwpb.HelloReply{Message: "Hello " + in.Name}, nil
+}
+
+type ecServer struct {
+	ecpb.UnimplementedEchoServer
+}
+
+func (s *ecServer) UnaryEcho(_ context.Context, req *ecpb.EchoRequest) (*ecpb.EchoResponse, error) {
+	return &ecpb.EchoResponse{Message: req.Message}, nil
+}
+
+func main() {
+	flag.Parse()
+	lis, err := net.Listen("tcp", fmt.Sprintf(":%d", *port))
+	if err != nil {
+		log.Fatalf("failed to listen: %v", err)
+	}
+	fmt.Printf("server listening at %v\n", lis.Addr())
+
+	s := grpc.NewServer()
+
+	// Register Greeter on the server.
+	hwpb.RegisterGreeterServer(s, &hwServer{})
+
+	// Register RouteGuide on the same server.
+	ecpb.RegisterEchoServer(s, &ecServer{})
+
+	// Register reflection service on gRPC server.
+	reflection.Register(s)
+
+	if err := s.Serve(lis); err != nil {
+		log.Fatalf("failed to serve: %v", err)
+	}
+}