反向代理天坑！！！

r := gin.Default()
    r.GET("/", func(c *gin.Context) {

        c.String(200, "Hello, Geektutu")
    })

    r.GET("/cool", func(c *gin.Context) {
        director := func(req *http.Request) {

            req.URL.Scheme="http"
            req.URL.Host="localhost:8080"
            req.URL.Path=""
            req.Host = "localhost:8080"
        }

        proxy := &httputil.ReverseProxy{Director: director, Transport: http.DefaultTransport}
        proxy.ServeHTTP(c.Writer, c.Request)
    })
    r.Run() // listen and serve on 0.0.0.0:8080

因为path路径没有修改导致一直在cool path下死循环！！