Golang-微服务实战

本次微服务基于go-micro框架实现

安装 protoc
- 访问url: https://github.com/protocolbuffers/protobuf/releases/，并下载相应安装包，以windows为例，下载(protoc-23.0-rc-3-win64.zip)
- 如图
- 解压并加入到系统Path,如图

安装 protoc-gen-go

go install google.golang.org/protobuf/cmd/protoc-gen-go@latest

安装 protoc-gen-micro

go install github.com/go-micro/generator/cmd/protoc-gen-micro@latest

创建项目

cd ~/dev/golang
mkdir -p micro-demo/server
cd micro-demo/server
go mod init micro-demo

编写 protobuf文件

cd ~/dev/golang/micro-demo/server
mkdir -p proto/user
vim proto/user/user.proto

#~/dev/golang/micro-demo/server/proto/user/user.proto
syntax = "proto3";

package user;

service User {
  rpc Login(LoginRequest) returns (LoginResponse) {}
  }
  message LoginRequest {
    string email = 1;
    string password = 2;
  }
  message LoginResponse {
    string username = 1;
 }
option go_package = "../user";

生成代码

cd ~/dev/golang/micro-demo/server/proto/user/
protoc --proto_path=. --micro_out=. --go_out=. user.proto
$ tree ~/dev/golang/micro-demo/server/proto/
~/dev/golang/micro-demo/server/proto/
`-- user
    |-- user.pb.go
    |-- user.pb.micro.go
    `-- user.proto

1 directory, 3 files

服务端handler

mkdir -p ~/dev/golang/micro-demo/server/handler/user
vim ~/dev/golang/micro-demo/server/handler/user/user.go 

package user

import (
	"context"
	"micro-demo/proto/user"
)

type User struct{}

func (u *User) Login(ctx context.Context, req *user.LoginRequest, rsp *user.LoginResponse) error {
	if req.Email != "imoowi@qq.com" || req.Password != "123456" {
		rsp.Username = "Sorry " + req.Email
		return nil
	}
	rsp.Username = "Welcome " + req.Email
	return nil
}

服务端main.go

package main

import (
	"log"
	hUser "micro-demo/handler/user"
	pbUser "micro-demo/proto/user"
	"go-micro.dev/v4"
)

func main() {
	service := micro.NewService(micro.Name("user"))
	service.Init()
	err := pbUser.RegisterUserHandler(service.Server(), new(hUser.User))
	if err != nil {
		log.Fatal(err)
	}
	if err := service.Run(); err != nil {
		log.Fatal(err)
	}
}

运行服务

cd ~/dev/golang/micro-demo/server/
$ go run main.go
2023-05-08 16:27:56  file=server/main.go:18 level=info Starting [service] user
2023-05-08 16:27:56  file=v4@v4.10.2/service.go:99 level=info Transport [http] Listening on [::]:63836
2023-05-08 16:27:56  file=v4@v4.10.2/service.go:99 level=info Broker [http] Connected to 127.0.0.1:63837
2023-05-08 16:27:56  file=server/rpc_server.go:556 level=info Registry [mdns] Registering node: user-fce14126-574f-4417-bd09-8e3e33d4be78

测试服务

$ curl -XPOST -H 'Content-Type: application/json' -H 'Micro-Endpoint: User.Login' -d '{"email": "imoowi@qq.com"
,"password":"123456"}' http://localhost:63836
{"username":"Welcome imoowi@qq.com"}

客户端
todo
Go-Micro-CLI
- https://github.com/go-micro/cli
- 新建一个服务

go-micro new service gitee.com/imoowi/go-micro/user
cd user
make init proto update tidy