mirror of https://github.com/grpc/grpc-go.git
125 lines
3.0 KiB
Go
125 lines
3.0 KiB
Go
/*
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*
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* Copyright 2018 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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// Binary server demonstrates how to handle RPCs with deadlines and how to
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// propagate deadlines in requests.
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package main
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import (
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"context"
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"flag"
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"fmt"
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"io"
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"log"
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"net"
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"strings"
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"time"
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"google.golang.org/grpc"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/credentials/insecure"
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"google.golang.org/grpc/status"
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pb "google.golang.org/grpc/examples/features/proto/echo"
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)
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var port = flag.Int("port", 50052, "port number")
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// server is used to implement EchoServer.
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type server struct {
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pb.UnimplementedEchoServer
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client pb.EchoClient
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cc *grpc.ClientConn
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}
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func (s *server) UnaryEcho(ctx context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) {
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message := req.Message
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if strings.HasPrefix(message, "[propagate me]") {
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time.Sleep(800 * time.Millisecond)
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message = strings.TrimPrefix(message, "[propagate me]")
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return s.client.UnaryEcho(ctx, &pb.EchoRequest{Message: message})
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}
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if message == "delay" {
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time.Sleep(1500 * time.Millisecond)
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}
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return &pb.EchoResponse{Message: req.Message}, nil
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}
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func (s *server) BidirectionalStreamingEcho(stream pb.Echo_BidirectionalStreamingEchoServer) error {
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for {
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req, err := stream.Recv()
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if err == io.EOF {
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return status.Error(codes.InvalidArgument, "request message not received")
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}
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if err != nil {
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return err
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}
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message := req.Message
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if strings.HasPrefix(message, "[propagate me]") {
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time.Sleep(800 * time.Millisecond)
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message = strings.TrimPrefix(message, "[propagate me]")
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res, err := s.client.UnaryEcho(stream.Context(), &pb.EchoRequest{Message: message})
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if err != nil {
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return err
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}
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stream.Send(res)
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}
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if message == "delay" {
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time.Sleep(1500 * time.Millisecond)
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}
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stream.Send(&pb.EchoResponse{Message: message})
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}
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}
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func (s *server) Close() {
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s.cc.Close()
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}
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func newEchoServer() *server {
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target := fmt.Sprintf("localhost:%v", *port)
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cc, err := grpc.NewClient(target, grpc.WithTransportCredentials(insecure.NewCredentials()))
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if err != nil {
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log.Fatalf("did not connect: %v", err)
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}
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return &server{client: pb.NewEchoClient(cc), cc: cc}
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}
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func main() {
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flag.Parse()
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address := fmt.Sprintf(":%v", *port)
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lis, err := net.Listen("tcp", address)
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if err != nil {
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log.Fatalf("failed to listen: %v", err)
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}
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echoServer := newEchoServer()
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defer echoServer.Close()
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grpcServer := grpc.NewServer()
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pb.RegisterEchoServer(grpcServer, echoServer)
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if err := grpcServer.Serve(lis); err != nil {
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log.Fatalf("failed to serve: %v", err)
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}
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}
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