http-reverse-proxy.go

package main

import (
	"context"
	"fmt"
	"log"
	"net"
	"net/http"
	"net/url"
	"time"

	"github.com/elazarl/goproxy"
	chclient "github.com/jpillora/chisel/client"
	chserver "github.com/jpillora/chisel/server"
)

const (
	serverHost  = "localhost"
	serverPort  = "8080"
	serverProxy = "8090"
	clientProxy = "9090"
)

func main() {
	serverCfg := chserver.Config{
		Reverse: true,
		KeySeed: "w9Bekn30tbQoyZsJfSLsbLsI7A4ctfDHqUKwTEdoATI=",
	}

	srv, err := chserver.NewServer(&serverCfg)
	if err != nil {
		log.Fatal(err)
	}

	err = srv.Start(serverHost, serverPort)
	if err != nil {
		log.Fatal(err)
	}

	proxyRemote := fmt.Sprintf("R:%s:localhost:%s", serverProxy, clientProxy)
	clientCfg := chclient.Config{
		Server:      net.JoinHostPort(serverHost, serverPort),
		Fingerprint: "OhVC/whI4WGsM6RCDzrz53ZHUdtlX7u016FALqvpaWE=",
		Remotes:     []string{proxyRemote},
	}

	client, err := chclient.NewClient(&clientCfg)
	if err != nil {
		log.Fatal(err)
	}

	err = client.Start(context.Background())
	if err != nil {
		log.Fatal(err)
	}

	go func() {
		proxy := goproxy.NewProxyHttpServer()
		log.Fatal(http.ListenAndServe(":"+clientProxy, proxy))
	}()

	time.Sleep(time.Second)

	proxyString := "http://localhost:" + serverProxy
	proxyUrl, _ := url.Parse(proxyString)

	hc := &http.Client{
		Transport: &http.Transport{
			Proxy: http.ProxyURL(proxyUrl),
		},
	}

	fmt.Println(hc.Get("https://heise.de"))
	time.Sleep(10 * time.Second)
}