Golang gRPC开发快速入门

下载工具

https://github.com/protocolbuffers/protobuf/releases
对应系统下载即可

• protoc-3.xx.0-win64.zip
• protoc-3.xx.0-linux-x86_64.zip

注意：protoc的版本需要和golang/protobuf保持一致 （尽量自己去下载最新的版本）

下载完成后解压后记得将路径添加到环境变量中

下载go的依赖包

go get github.com/golang/protobuf/protoc-gen-go

proto文件

代码

syntax = "proto3";

option go_package = "/.;proto";

service Greeter {
  rpc SayHello (HelloRequest) returns (HelloReply);
}

message HelloRequest {
  string name = 1;
}

message HelloReply {
  string message = 1;
}

生成go文件

protoc -I . goods.proto --go_out=plugins=grpc:.

服务端代码

package main

import (
	"context"
	"demo1/grpc_start/proto"
	"google.golang.org/grpc"
	"net"
)

type Server struct{}

// 参数必须一致
func (s *Server) SayHello(ctx context.Context, request *proto.HelloRequest) (*proto.HelloReply, error) {
	return &proto.HelloReply{
		Message: "hello " + request.Name,
	}, nil
}

func main() {
	// 创建服务
	g := grpc.NewServer()
	// 注册服务
	proto.RegisterGreeterServer(g, &Server{})
	listener, err := net.Listen("tcp", "localhost:8080")
	if err != nil {
		panic("failed Listen:" + err.Error())
	}
	err = g.Serve(listener)
	if err != nil {
		panic("failed to start grpc:" + err.Error())
	}
}

客户端

package main

import (
	"context"
	"demo1/grpc_start/proto"
	"fmt"
	"google.golang.org/grpc"
)

func main() {
	conn, err := grpc.Dial("localhost:8080", grpc.WithInsecure())
	if err != nil {
		panic(err)
	}
	defer conn.Close()
	c := proto.NewGreeterClient(conn)
	r, err := c.SayHello(context.Background(), &proto.HelloRequest{Name: "lzscxb"})
	fmt.Println(r.Message)
}

测试