【Go语言实战】 (15) Gin+gRPC 微服务实现备忘录 (下) | 备忘录模块

写在前面

和上篇文章类似，这次我们完成具体功能部分。

源码地址：

https://github.com/CocaineCong/gRPC-todoList

1. 备忘录部分

1.1 proto模块定义

taskModel.proto

syntax="proto3";
package pb;
option go_package = "/internal/service;service";

message TaskModel {
    // @inject_tag: json:"favorite_id"
    uint32 TaskID=1;
    // @inject_tag: json:"user_id"
    uint32 UserID=2;
    // @inject_tag: json:"status"
    uint32 Status=3;
    // @inject_tag: json:"title"
    string Title=4;
    // @inject_tag: json:"content"
    string Content=5;
    // @inject_tag: json:"start_time"
    uint32 StartTime=6;
    // @inject_tag: json:"end_time"
    uint32 EndTime=7;
}

taskService.proto

syntax="proto3";
package pb;
import "taskModels.proto";
option go_package = "/internal/service;service";

message TaskRequest{
    uint32 TaskID=1;
    uint32 UserID=2;
    uint32 Status=3;
    string Title=4;
    string Content=5;
    uint32 StartTime=6;
    uint32 EndTime=7;
}

message TasksDetailResponse{
  repeated TaskModel TaskDetail=1;
  uint32 Code=2;
}

message CommonResponse{
    uint32 Code=1;
    string Msg=2;
    string Data=3;
}

service TaskService{
  rpc TaskCreate(TaskRequest) returns(CommonResponse);
  rpc TaskUpdate(TaskRequest) returns(CommonResponse);
  rpc TaskShow(TaskRequest) returns(TasksDetailResponse);
  rpc TaskDelete(TaskRequest) returns(CommonResponse);
}

获取所有生成pb.go文件

protoc -I internal/service/pb internal/service/pb/*.proto --go_out=plugins=grpc:.

1.2 数据库结构定义

• 模型定义

type Task struct {
	TaskID    uint   `gorm:"primarykey"` // 收藏夹id
	UserID    uint   `gorm:"index"`      // 用户id
	Status    int    `gorm:"default:0"`
	Title 	  string
	Content   string `gorm:"type:longtext"`
	StartTime int64
	EndTime   int64
}

• 展示所有的任务

func (*Task) Show (req *service.TaskRequest)(taskList []Task,err error) {
	err = DB.Model(Task{}).Where("user_id=?", req.UserID).Find(&taskList).Error
	if err != nil {
		return taskList, err
	}
	return taskList, nil
}

• 创建备忘录

func (*Task) Create (req *service.TaskRequest) error {
	task := Task{
		UserID: uint(req.UserID),
		Title : req.Title,
		Content : req.Content,
		Status : int(req.Status),
		StartTime : int64(req.StartTime),
		EndTime : int64(req.EndTime),
	}
	if err := DB.Create(&task).Error; err != nil {
		util.LogrusObj.Error("Insert Task Error:" + err.Error())
		return err
	}
	return nil
}

• 删除备忘录

func (*Task) Delete(req *service.TaskRequest) error {
	err := DB.Where("task_id=?", req.TaskID).Delete(Task{}).Error
	return err
}

• 更新

func (*Task) Update(req *service.TaskRequest) error {
	t := Task{}
	err := DB.Where("task_id=?", req.TaskID).First(&t).Error
	if err != nil {
		return err
	}
	t.Title = req.Title
	t.Content = req.Content
	t.Status = int(req.Status)
	t.StartTime = int64(req.StartTime)
	t.EndTime = int64(req.EndTime)
	err = DB.Save(&t).Error
	return err
}

1.3 接入ETCD

• ETCD服务初始化

etcdAddress := []string{viper.GetString("etcd.address")}
etcdRegister := discovery.NewRegister(etcdAddress, logrus.New())
grpcAddress := viper.GetString("server.grpcAddress")

• 节点接入ETCD

taskNode := discovery.Server{
	Name: viper.GetString("server.domain"),
	Addr: grpcAddress,
}
server := grpc.NewServer()

• 服务注册节点

service.RegisterTaskServiceServer(server, handler.NewTaskService())
lis, err := net.Listen("tcp", grpcAddress)
if err != nil {
	panic(err)
}
if _, err := etcdRegister.Register(taskNode, 10); err != nil {
	panic(fmt.Sprintf("start server failed, err: %v", err))
}

2. 网关接入

2.1 服务接入

• 获取ETCD的服务

taskConn, _ := grpc.Dial("127.0.0.1:10002", opts...)
taskService := service.NewTaskServiceClient(taskConn)

• 路由注入

authed := v1.Group("/")
authed.Use(middleware.JWT())
{
	// 任务模块
	authed.GET("task", handler.GetTaskList)
	authed.POST("task", handler.CreateTask)
	authed.PUT("task", handler.UpdateTask)
	authed.DELETE("task", handler.DeleteTask)
}

将服务存放在gin.Keys中

func InitMiddleware(service []interface{}) gin.HandlerFunc {
	return func(context *gin.Context) {
		// 将实例存在gin.Keys中
		context.Keys = make(map[string]interface{})
		context.Keys["user"] = service[0]
		context.Keys["task"] = service[1]
		context.Next()
	}
}

2.2 controller

• 获取token，获取是哪个用户

claim, _ := util.ParseToken(ginCtx.GetHeader("Authorization"))

• 获取task服务

TaskService := ginCtx.Keys["task"].(service.TaskServiceClient)

• 调用服务

TaskResp, err := TaskService.TaskShow(context.Background(), &fReq)

• 完整代码

func GetTaskList(ginCtx *gin.Context) {
	var fReq service.TaskRequest
	PanicIfTaskError(ginCtx.Bind(&fReq))
	claim, _ := util.ParseToken(ginCtx.GetHeader("Authorization"))
	fReq.UserID = uint32(claim.UserID)
	TaskService := ginCtx.Keys["task"].(service.TaskServiceClient)
	TaskResp, err := TaskService.TaskShow(context.Background(), &fReq)
	PanicIfTaskError(err)
	r := res.Response{
		Data:   TaskResp,
		Status: uint(TaskResp.Code),
		Msg:    e.GetMsg(uint(TaskResp.Code)),
	}
	ginCtx.JSON(http.StatusOK, r)
}

3. 测试返回