Deauthing proxy.

proxy.go

package main

import (
	"flag"
	"log"
	"net/http"
	"net/http/httputil"
	"net/url"
)

var target = flag.String("target", "http://www.google.com/", "Where to go.")
var addr = flag.String("listen", ":12345", "Address/port on which to listen.")
var auth = flag.String("auth", "", "Authorization header to add (optional).")

func main() {
	flag.Parse()

	targetUrl, uerr := url.Parse(*target)
	if uerr != nil {
		log.Fatalf("Error parsing target ``%v'': %v", target, uerr)
	}

	proxy := httputil.ReverseProxy{Director: func(req *http.Request) {
		req.URL.Scheme = targetUrl.Scheme
		req.URL.Host = targetUrl.Host
		req.Host = targetUrl.Host
		if *auth != "" {
			req.Header.Set("Authorization", *auth)
		}
	}}

	err := http.ListenAndServe(*addr, &proxy)
	if err != nil {
		log.Fatalf("ListenAndServe: %v", err)
	}
}