This is a web proxy I wrote to provide unauthenticated access to a web service that required HTTP basic auth. I needed it for an internal thingy (and still use it):
package main
import (
"flag"
"log"
"net/http"
"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 ``%s'': ", target, uerr.String())
}
proxy := http.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)
}
}}
log.Fatal(http.ListenAndServe(*addr, &proxy))
}