HTTP Connect Scheme Support for golang.org/x/net/proxy

A golang.org/x/net/proxy compatible scheme registration that establishes the TCP connection over an HTTP CONNECT Tunnel.

This is a refactor of https://github.com/mwitkow/go-http-dialer to make it compatible with golang.org/x/net/proxy

Features

• unencrypted connection to proxy (e.g. http://proxy.example.com:3128
• TLS connection to proxy (customizeable) (e.g. https://proxy.example.com)
• customizeable for Proxy-Authenticate, with challenge-response semantics
• out of the box support for Basic auth
• appropriate RemoteAddr remapping

Usage

Simple

Just call proxy.RegisterDialerType("http", connect_proxy_scheme.ConnectProxy) somewhere in your application to register the handler for HTTP.

Be aware that HTTP_PROXY and HTTPS_PROXY and related environment variables are not picked up automatically by golang.org/x/net/proxy because it does not have support for them (which this library adds). If you want to use environment variable configuration you'll need to write it yourself.

Worked Example

package main
import (
	"fmt"
	"net/http"
	"net/url"
	"golang.org/x/net/proxy"
	"github.com/wrouesnel/go.connect-proxy-scheme"
)

func init() {
	proxy.RegisterDialerType("http", connect_proxy_scheme.ConnectProxy)
}

func main() {
	u, err := url.Parse("http://some-squid-proxy:3128")
	if err != nil {
		panic(err)
    }
	
	dialer, err := proxy.FromURL(u, proxy.Direct)
	if err != nil {
		panic(err)
    }

	tr := &http.Transport{
		DialContext: proxy.DialContext,
	}
	client := http.Client{Transport: tr}
	
	resp, err := client.Get("http://google.com")
	if err != nil {
		panic(err)
    }
	
	fmt.Println(resp)
}