Carry http request through tor in go

tor_poc.go

// Author: Hugo Guiroux: http://hugoguiroux.blogspot.fr/
package main

import (
	"code.google.com/p/go.net/proxy"
	"flag"
	"fmt"
	"io/ioutil"
	"log"
	"net"
	"net/http"
)

var torAddr = flag.String("host", "localhost", "host for tor proxy")
var torPort = flag.Int("port", 9050, "port for tor proxy")

const ipWebSite = "http://checkip.dyndns.org/"

// main usage : ./tor_poc [-host tor_address] [-port tor_port] [-help]
func main() {
	// Parse command line arguments
	flag.Parse()

	log.Printf("Connecting using tor (%s:%d) to (%s)\n", *torAddr, *torPort, ipWebSite)

	// Try to retrieve IP address from ipWebSite
	tr := http.Transport{
		Dial: socks5Dial, // To test without tor, replace socks5Dial by net.Dial
	}

	client := http.Client{Transport: &tr}
	resp, err := client.Get(ipWebSite)

	if err != nil {
		log.Fatal(err)
	}

	// Read content of http request
	defer resp.Body.Close()
	content, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		log.Fatal(err)
	}

	fmt.Println(string(content))
}

// Create specific dial function for http lib
func socks5Dial(network, addr string) (net.Conn, error) {
	socks5Proxy, err := proxy.SOCKS5("tcp", fmt.Sprintf("%s:%d", *torAddr, *torPort), nil, proxy.Direct)
	if err != nil {
		return nil, err
	}

	return socks5Proxy.Dial(network, addr)
}