gin-构建第一个gin项目

1. 项目目录结构

 

 

 2. 定义main函数

package main

import (
	"fmt"
	"go.uber.org/zap"

	"mxshop-api/user-web/initialize"
)

func main() {

	//初始化logger
	initialize.InitLogger()

	//初始化routes
	Router := initialize.Routers()

	/*
		1. S()可以获取一个全局的sugar，可以让我们自己设置一个全局的logger
		2. 日志是分级别的，debug， info ， warn， error， fetal
		3. S函数和L函数很有用， 提供了一个全局的安全访问logger的途径
	*/

	zap.S().Infof("启动服务")
	port := 8881
	if err := Router.Run(fmt.Sprintf(":%d", port)); err != nil {
		zap.S().Panic("启动失败:", err.Error())
	}

}

　3. 定义及初始化logger

在initialize/创建logger.go

package initialize

import "go.uber.org/zap"

func InitLogger() {
	logger, _ := zap.NewProduction()
	zap.ReplaceGlobals(logger)
}

　　

 

 4. 初始化路由

在initialize/创建router.go

package initialize

import (
	"github.com/gin-gonic/gin"
	"mxshop-api/user-web/router"
)

func Routers() *gin.Engine {
	Router := gin.Default()
	ApiGroup := Router.Group("v1")
	router.InitUserRoute(ApiGroup)
	return Router
}

5.定义路由

在router下创建router.go

package router

import (
	"github.com/gin-gonic/gin"
	"mxshop-api/user-web/api"
)

func InitUserRoute(Router *gin.RouterGroup) {
	UserRouter := Router.Group("user")
	{
		UserRouter.GET("list", api.GetUserList)

	}
}

　　

6. 定义路由调用方法函数

在mxshop-api/user-web/api创建user.go

package api

import (
	"context"
	"fmt"
	"github.com/gin-gonic/gin"
	"go.uber.org/zap"
	"google.golang.org/grpc"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/credentials/insecure"
	"google.golang.org/grpc/status"
	"mxshop-api/user-web/global/reponse"
	"mxshop-api/user-web/proto"
	"net/http"
	"time"
)

func HandleGrpcErrorToHttp(err error, c *gin.Context) {
	//	将GRPC的code转换成HTTP的状态码
	if err != nil {
		if e, ok := status.FromError(err); ok {
			switch e.Code() {
			case codes.NotFound:
				c.JSON(http.StatusNotFound, gin.H{
					"msg": e.Message(),
				})
			case codes.Internal:
				c.JSON(http.StatusInternalServerError, gin.H{
					"msg": "内部错误",
				})
			case codes.InvalidArgument:
				c.JSON(http.StatusBadRequest, gin.H{
					"msg": "参数错误",
				})
			case codes.Unavailable:
				c.JSON(http.StatusInternalServerError, gin.H{
					"msg": "用户服务不可用",
				})
			default:
				c.JSON(http.StatusInternalServerError, gin.H{
					"msg": "其他错误",
				})
			}
			return
		}
	}
}

func GetUserList(ctx *gin.Context) {
	//ip := "127.0.0.1"
	//port := "50051"

	//拨号连接用户RPC服务
	userConn, err := grpc.Dial(fmt.Sprintf("127.0.0.1:50051"), grpc.WithTransportCredentials(insecure.NewCredentials()))
	if err != nil {
		zap.S().Errorw("[GetUserList]连接失败【用户服务失败】", "msg", err.Error())
	}
	//生成grpc的client并调用接口
	userSrvClient := proto.NewUserClient(userConn)
	rsp, err := userSrvClient.GetUserList(context.Background(), &proto.PageInfo{
		Pn:    1,
		PSize: 10,
	})
	if err != nil {
		zap.S().Errorw("[GetUserList]查询用户列表失败")
		HandleGrpcErrorToHttp(err, ctx)
		return
	}
	result := make([]interface{}, 0)
	for _, value := range rsp.Data {
		//data := make(map[string]interface{})

		user := reponse.UserResponse{
			Id:       value.Id,
			NickName: value.NickName,
			BirthDay: reponse.JsonTime(time.Unix(int64(value.BirthDay), 0)),
			//BirthDay: time.Unix(int64(value.BirthDay), 0).Format("2022-01-01"),
			//BirthDay: time.Unix(int64(value.BirthDay), 0),
			Gender: value.Gender,
			Mobile: value.Mobile,
		}
		result = append(result, user)

	}
	ctx.JSON(http.StatusOK, result)
}