package main

import (
	"bytes"
	"errors"
	"fmt"
	"net/http"
	"strings"
)

func redirectPolicyFunc(req *http.Request, via []*http.Request) error {
	if len(via) >= 1{
		return errors.New("stopped after 1 redirects")
	}
	return nil
}

func GetImageurl(api string)string{
	client := &http.Client{
		CheckRedirect: redirectPolicyFunc,
	}
	reqest,_:=http.NewRequest("GET",api,nil)
	//reqest.Header.Add("Accept","text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8")
	resp, _ := client.Do(reqest)
	defer resp.Body.Close()
	url,_:=resp.Location()
	return url.String()
}

func GetImagedata(imageurl string)string{

	/*client := &http.Client{
		CheckRedirect: redirectPolicyFunc,
	}
	reqest,_:=http.NewRequest("GET","api",nil)
	reqest.Header.Add("Accept-Language","zh-CN")
	reqest.Header.Add("User-Agent","Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.140 Safari/537.36 Edge/18.17763")
	//reqest.Header.Del()
	reqest.Header.Add("Upgrade-Insecure-Requests","1")
	reqest.Header.Add("Connection","close")
	reqest.Header.Add("Accept-Encoding","gzip, deflate")
	reqest.Header.Add("Cookie","security_session_verify=93344b72152e59dffb9233be1d328dc1")
	resp, _ := client.Do(reqest)
	//reqs[0].Close=true
	fmt.Println(resp.Location())
	defer resp.Body.Close()

*/
	fmt.Println(imageurl)
	resp,_:=http.Get(imageurl)
	defer resp.Body.Close()
	/*f, err := os.Create("xxs"+".jpg")
	if err != nil {
		panic(err)
	}
	io.Copy(f, resp.Body)*/
	buf := new(bytes.Buffer)
	buf.ReadFrom(resp.Body)
	s := buf.String()
	return s
	//fmt.Println(string(buf))
}

func sayapiurl(w http.ResponseWriter, r *http.Request) {
	url:=r.URL.Path
	if url!="/favicon.ico" {
		tmp:=strings.SplitN(url,"/",3)
		tmp2:=tmp[1]+`://`
		tmp2+=tmp[2]
		fmt.Fprint(w,GetImagedata(GetImageurl(tmp2)))
	}
}
func main() {
	http.HandleFunc("/", sayapiurl) //设置访问的路由
	err := http.ListenAndServe(":9090", nil) //设置监听的端口
	if err != nil {
		fmt.Println("ListenAndServe: ", err)
	}

}

格式http://ip:9090/https/api地址(不带https://)