Gin

Gin 教學

參考
Gin - 好用的 web framework
人生苦短，我用 Golang--Gin 框架（四-

部分範例
func startGinHttpServer(err chan error) {
	gin.SetMode(gin.ReleaseMode)
	engine := gin.New()
	loadRoutes(engine)
	apis.StartHttpServer(err, engine)

}
func StartHttpServer(errChan chan error, engine *gin.Engine) {
	
	endpoint := fmt.Sprintf(":%d", config.ConfigData.Service.Port)
	go func() {
		errChan <- engine.Run(endpoint)
	}()

	zap.S().Infof("Listening on port: %d", config.ConfigData.Service.Port)
}


func NewHandler(base *gin.RouterGroup, ) {

	base.GET("/info", handler.GetInfo) 
	base.PUT("/info", handler.UpdateInfo)

}

func (a *InfoHandler) GetInfo(c *gin.Context) {
	//call usecase method
	info, _ := a.CUsecase.GetInfo()

	c.JSON(http.StatusOK, info)
}

func (a *InfoHandler) UpdateInfo(c *gin.Context) {

	body := models.Info{}
	//gin example bind body
	if err := c.BindJSON(&body); err != nil {
		c.JSON(http.StatusBadRequest, err)
		return
	}
	//call usecase method
	err := a.CUsecase.Update(&body)
	if err != nil {
		c.JSON(http.StatusExpectationFailed, err)
		return
	}

	c.JSON(http.StatusOK, "ok")
}

中間件

如果沒特別處理，一般就會顯示 not found string預設顯示
r.NoMethod(HandleNotFound)
r.NoRoute(HandleNotFound)

rate limiter

希望API不要被特定節點頻繁存取以致於造成伺服器端的過載

參考文章	筆記
Setting up Route Not Found in Gin	What you're looking for is the NoRoute handler.
Rate limit with Go and Gin	Rate limiting 通常在很多開放API的服務內會常看到, 像是Twitter, 像是Facebook或是新浪微博, 其目的就是希望API不要被特定節點頻繁存取以致於造成伺服器端的過載