必备下载
由于protobuf设定的是定义中间文件并转为每个语言的文件，所以必须装一个protoc的编译器
https://github.com/protocolbuffers/protobuf/releases
而go则再需要一个插件
https://github.com/golang/protobuf/tree/master/protoc-gen-go
go get -u github.com/golang/protobuf/protoc-gen-go配置
protoc 将解压后的文件配置到path中
项目结构
Go的项目结构大概分为bin、pkg、src三个，bin是编译后可执行的文件，pkg是一些依赖包存放的地方，src就是编写的源码
此外，需要在src下新建一个go.mod文件，有点类似Java的pom.xml，做一些依赖的配置
module demogo 1.13require ( github.com/gin-gonic/gin v1.6.2 github.com/golang/protobuf v1.4.2 google.golang.org/grpc v1.29.1 google.golang.org/protobuf v1.23.0)然后在src下新建一个文件夹存放proto文件
Protobuf是一个定义通信格式的协议，不同的进程（Java，C++，Go whatever）只要遵循这个协议都可以进行序列化和反序列化，而且性能很高。
syntax = "proto3";package proto;message HelloRequest{ string name = 1;}message HelloResponse{ string message = 1;}service Hello{ rpc Say (HelloRequest) returns (HelloResponse) {};}编写完成之后，程序依然无法识别这个rpc接口，它不像maven一样，做一个接口包然后共享出去，用户方通过pom文件的引入，就能看到接口定义进而调用。
它需要执行一个编译，使用go generation进行生成中间文件。
到proto的目录下，执行这个，使用grpc的插件生成中间文件，这样就能得到接口定义的go文件。
protoc hello.proto --go_out=plugins=grpc:.服务端代码
package mainimport ( "context" my "demo/myproto" "google.golang.org/grpc" "google.golang.org/grpc/reflection" "log" "net")type server struct{}const ( port = ":8081")func (s *server) Say(ctx context.Context, in *my.HelloRequest) (*my.HelloResponse, error) { log.Printf("Received: %s", in.Name) return &my.HelloResponse{Message: "hello"}, nil}func listenAndService(){ lis,err := net.Listen("tcp",port) if err != nil{ log.Fatalf("failed to listen,%v",err) } s := grpc.NewServer() my.RegisterHelloServer(s, &server{}) //注册服务 reflection.Register(s) log.Print("the rpc server is started upn") if err := s.Serve(lis); err != nil { log.Fatalf("failed to serve %v",err) }}func main(){ listenAndService()}首先注意的第一点，跨go文件调用，定义的方法名首字母必须大写，如果是小写则不能被外部go文件调用，类似于private。
其次就是引包路径（匪夷所思，伞兵设计），是从你GOPATH开始，demo/myproto，中间的src哪去了不知道。
还有就是，不知道为什么定义个server的结构体。
客户端代码
package mainimport ( "context" rpc "demo/myproto" "google.golang.org/grpc" "log")const PORT = ":8081"func main(){ conn,err := grpc.Dial(PORT,grpc.WithInsecure()) if err != nil { log.Fatalf("get an error : %vn", err) } defer conn.Close() client := rpc.NewHelloClient(conn) resp,err := client.Say(context.Background(),&rpc.HelloRequest{ Name: "this is client", }) if err != nil { log.Fatalf("invoke error n") } log.Printf("resp : %sn",resp.GetMessage())}实验截图
给这篇文章的作者打赏
文章来源：智云一二三科技
文章标题：Protobuf+gRpc Go语言微服务组件搭建
文章地址：https://www.zhihuclub.com/855.shtml
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