golang grpc服务端客户端简单源码实现

最新推荐文章于 2024-08-12 23:36:56 发布

fjgui

最新推荐文章于 2024-08-12 23:36:56 发布

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分类专栏： go学习

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本文介绍了一个使用gRPC实现的服务示例，包括定义了请求和响应消息类型、服务接口及其实现，还提供了服务端和客户端的代码实现。

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协议

hello.proto 文件：

syntax = "proto3";

package hello;

message HelloRequest {

    string greeting = 1;

message HelloResponse {

    string reply = 1;

    repeated int32 number = 4;

service HelloService {

    rpc SayHello(HelloRequest) returns (HelloResponse) {}

服务端代码：

// test_grpc project test_grpc.go
package main

import (
	"flag"
	"fmt"
	"log"
	"net"
	pb "proto"

	context "golang.org/x/net/context"
	"google.golang.org/grpc"
)

type server struct{}

func (s *server) SayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloResponse, error) {
	//fmt.Println("hello")
	if in.Greeting == "helloworld" {
		return &pb.HelloResponse{in.Greeting, []int32{1, 2}}, nil
	} else {
		return &pb.HelloResponse{"fjgui", []int32{666}}, nil
	}
	//return &pb.HelloResponse{"fjgui", []int32{1, 2}}, nil
}

func main() {
	port := flag.Int("port", 8000, "the server")
	lis, err := net.Listen("tcp", fmt.Sprintf("127.0.0.1:%d", *port))
	if err != nil {
		log.Fatalf("failed to listen: %v", err)
	}

	s := grpc.NewServer()
	pb.RegisterHelloServiceServer(s, &server{})
	s.Serve(lis)
}
客户端代码：

// test_grpc_client project test_grpc_client.go
package main

import (
	"flag"
	"fmt"
	"log"
	"os"
	pb "proto"

	context "golang.org/x/net/context"
	"google.golang.org/grpc"
)

func main() {
	address := flag.String("addressfjgui", "127.0.0.1:8000", "The server address in the format of host:port")
	conn, err := grpc.Dial(*address, grpc.WithInsecure())
	if err != nil {
		log.Fatalf("did not connect:%v", err)
	}

	defer conn.Close()
	c := pb.NewHelloServiceClient(conn)

	req_greeting := "helloworld"
	if len(os.Args) > 1 {
		req_greeting = os.Args[1]
	}

	r, err := c.SayHello(context.Background(), &pb.HelloRequest{req_greeting})
	fmt.Println(req_greeting)
	if err != nil {
		log.Fatalf("could not greet: %v", err)
	}
	log.Printf("Greeting: %v", r.Reply)
	log.Printf("Greeting: %v", r.Number)
}