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main.go
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main.go
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/*
*
* Copyright 2018 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 is an example server.
package main
import (
"context"
"flag"
"fmt"
"io"
"log"
"net"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
pb "google.golang.org/grpc/examples/features/proto/echo"
"google.golang.org/grpc/status"
)
var port = flag.Int("port", 50051, "the port to serve on")
type server struct{}
func (s *server) UnaryEcho(ctx context.Context, in *pb.EchoRequest) (*pb.EchoResponse, error) {
return nil, status.Error(codes.Unimplemented, "not implemented")
}
func (s *server) ServerStreamingEcho(in *pb.EchoRequest, stream pb.Echo_ServerStreamingEchoServer) error {
return status.Error(codes.Unimplemented, "not implemented")
}
func (s *server) ClientStreamingEcho(stream pb.Echo_ClientStreamingEchoServer) error {
return status.Error(codes.Unimplemented, "not implemented")
}
func (s *server) BidirectionalStreamingEcho(stream pb.Echo_BidirectionalStreamingEchoServer) error {
for {
in, err := stream.Recv()
if err != nil {
fmt.Printf("server: error receiving from stream: %v\n", err)
if err == io.EOF {
return nil
}
return err
}
fmt.Printf("echoing message %q\n", in.Message)
stream.Send(&pb.EchoResponse{Message: in.Message})
}
}
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 port %v\n", lis.Addr())
s := grpc.NewServer()
pb.RegisterEchoServer(s, &server{})
s.Serve(lis)
}