go实现一个简单的http代理

当请求http://localhost:8080/html/home.html 自动转发请求到 http://192.168.0.1/html/home.html，带cookie请求，不过cookie要每次都手工抓取

package main

import (
	"io/ioutil"
	"log"
	"net/http"
	//	"strings"
)

func statistic(w http.ResponseWriter, r *http.Request) {
	//r.URL.RequestURI()
	client := &http.Client{}
	req, err := http.NewRequest("GET", "http://192.168.0.1"+r.URL.Path, nil)
	if err != nil {
		log.Fatal(err)
	}
	req.Header.Set("Cookie", `SessionID=y151QXjszzoP5D2Lvfun0S/JPnFfquDtASLyWz+ZiSg6ngSt1gpakE2DChVN+hnfFOS6rFJ6gwUL+y0pAG+RpYYSogAFcZsuN919FXZle45UGP+ka6fZmceI9ew7Mj4Z;path=/;HttpOnly;`)
	resp, err := client.Do(req)
	if err != nil {
		log.Fatal(err)
	}
	defer resp.Body.Close()
	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		log.Fatal(err)
	}
	w.Header().Set("Content-Type", resp.Header.Get("Content-Type"))
	w.Write(body)
}
func main() {
	mux := http.NewServeMux()
	mux.HandleFunc("/", statistic)
	err := http.ListenAndServe(":8080", mux)

	if err != nil {
		log.Fatal("ListenAndServe:", err)
	}
}