go-micro v3版本安装并配置案例

• 1. go-micro 安装
• • 1.1 安装protobuf
  • 1.2 安装go-micro框架
  • 1.3 安装micro
• 2.Consul服务发现配置
• 3. 生成服务模板
• • 3.1 编译proto文件
  • 3.2 修改main.go文件中的依赖
• 4. 图片验证码服务
• • 4.1 下载图片验证码库
  • 4.2 提供接口
  • 4.3 controller层处理
  • 4.4 service处理
• 5. 阿里云OSS

go get -u github.com/golang/protobuf/proto
go get -u github.com/golang/protobuf/protoc-gen-go
go get github.com/asim/go-micro/cmd/protoc-gen-micro/v3

go get github.com/asim/go-micro/v3

//需要用到Micro 3.0 环境的micro 工具，可以快速构建项目。但是在代码中不使用该库。
go get github.com/micro/micro/v3

1. 安装go-micro的consul

   go get github.com/asim/go-micro/plugins/registry/consul/v3
   

2. service/captcha/main.go

   package main
   
   import (
   	"github.com/asim/go-micro/plugins/registry/consul/v3"
   	"github.com/asim/go-micro/v3"
   	"github.com/asim/go-micro/v3/logger"
   	"renthome/service/Captcha/handler"
   	proto "renthome/service/Captcha/proto"
   )
   
   func main() {
   	//Consul Registry
   	consulRegistry := consul.NewRegistry()
   	// Create service
   	srv := micro.NewService(
   		micro.Registry(consulRegistry),
   		micro.Address("127.0.0.1:10001"),
   		micro.Name("captcha"),
   		micro.Version("latest"),
   	)
   
   	// Register handler
   	proto.RegisterCaptchaHandler(srv.Server(), new(handler.C))
   
   	// Run service
   	if err := srv.Run(); err != nil {
   		logger.Fatal(err)
   	}
   }
   

在service目录中创建服务模板
进入service目录
micro new captcha

make proto
protoc --proto_path=. --micro_out=. --go_out=:. proto/captcha.proto

修改为

import (
	"github.com/asim/go-micro/plugins/registry/consul/v3"
	"github.com/asim/go-micro/v3"
	"github.com/asim/go-micro/v3/logger"
	"renthome/service/Captcha/handler"
	proto "renthome/service/Captcha/proto"
)

go get github.com/afocus/captcha

r.GET("/api/imagecode/:uuid",controller.GetVerificationCode)

//GetImageCaptcha 获取图片验证码
func GetImageCaptcha(c *gin.Context) {
	//指定服务发现
	consulReg := consul.NewRegistry()
	consulService := micro.NewService(
		micro.Registry(consulReg),
	)
	//获取url参数
	uuid := c.Param("uuid")
	//获取指定服务客户端
	client := CaptchaPB.NewCaptchaService("captcha", consulService.Client())
	//通过客户端调用服务并接收返回值
	response, err := client.SendImageCaptcha(c, &CaptchaPB.SendImageCaptchaRequest{
		Uuid: uuid,
	})
	if err != nil {
		fmt.Println(err)
	}
	var image captcha.Image
	err = json.Unmarshal(response.Image, &image)
	if err != nil {
		fmt.Println("json.Unmarshal error:", err)
		return
	}
	err = png.Encode(c.Writer, image)
	if err != nil {
		fmt.Println("png.Encode error:", err)
		return
	}
}

service/captcha/handler/captcha.go

package handler

import (
	"context"
	"encoding/json"
	Captcha "github.com/afocus/captcha"
	"github.com/asim/go-micro/v3/util/log"
	"renthome/cache"
	proto "renthome/service/Captcha/proto"
)

type C struct{}

//SendImageCaptcha 发送图片验证码
func (e *C) SendImageCaptcha(ctx context.Context, req *proto.SendImageCaptchaRequest, rsp *proto.SendImageCaptchaResponse) error {
	captcha := Captcha.New()
	//设置字符集
	if err := captcha.SetFont("service/Captcha/conf/comic.ttf"); err != nil {
		return err
	}
	img, code := captcha.Create(4, Captcha.NUM)
	data, err := json.Marshal(img)
	if err != nil {
		return err
	}
	rsp.Image = data
	//调用redis存入验证码
	err = cache.SaveImageCaptcha(ctx, req.Uuid, code)
	if err != nil {
		return err
	}
	log.Info("Received Captcha.SendImageCaptcha request")
	return nil
}

//SendSMSCaptcha 发送短信验证码
func (e *C) SendSMSCaptcha(ctx context.Context, req *proto.SendSMSCaptchaRequest, rsp *proto.SendSMSCaptchaResponse) error {
	smsCaptcha, err := GenerateSMSCode(ctx, req.Phone, req.Label)
	if err != nil {
		return err
	}
	rsp.Code = smsCaptcha
	err = cache.SaveSMSCaptcha(ctx, req.Phone, req.Label, smsCaptcha)
	if err != nil {
		return err
	}
	return nil
}

参见官方文档