var portMap = map[string]string{
	"http":   "80",
	"https":  "443",
	"socks5": "1080",
}

// FROM: http://golang.org/src/net/http/transport.go
// canonicalAddr returns url.Host but always with a ":port" suffix
func CanonicalAddr(url *url.URL) string {
	addr := url.Host
	if !hasPort(addr) {
		return addr + ":" + portMap[url.Scheme]
	}
	return addr

	}
}

var portMap = map[string]string{
	"http":   "80",
	"https":  "443",
	"socks5": "1080",
}

// canonicalAddr returns url.Host but always with a ":port" suffix
func canonicalAddr(url *url.URL) string {
	addr := url.Hostname()
	if v, err := idnaASCII(addr); err == nil {
		addr = v
	}
	port := url.Port()
	if port == "" {
		port = portMap[url.Scheme]

func (s *SpdyRoundTripper) dialWithSocks5Proxy(req *http.Request, proxyURL *url.URL) (net.Conn, error) {
	// ensure we use a canonical host with proxyReq
	targetHost := netutil.CanonicalAddr(req.URL)
	proxyDialAddr := netutil.CanonicalAddr(proxyURL)

	var auth *proxy.Auth
	if proxyURL.User != nil {
		pass, _ := proxyURL.User.Password()
		auth = &proxy.Auth{
			User:     proxyURL.User.Username(),
			Password: pass,

// TLSConfig of the http.Transport
func DialURL(ctx context.Context, url *url.URL, transport http.RoundTripper) (net.Conn, error) {
	dialAddr := netutil.CanonicalAddr(url)

	dialer, err := utilnet.DialerFor(transport)
	if err != nil {
		klog.V(5).Infof("Unable to unwrap transport %T to get dialer: %v", transport, err)
	}

	switch url.Scheme {
	case "http":

func idnaASCIIFromURL(url *url.URL) string {
	addr := url.Hostname()
	if v, err := idnaASCII(addr); err == nil {
		addr = v
	}
	return addr
}

// canonicalAddr returns url.Host but always with a ":port" suffix.
func canonicalAddr(url *url.URL) string {
	port := url.Port()
	if port == "" {
		port = portMap[url.Scheme]
	}
	return net.JoinHostPort(idnaASCIIFromURL(url), port)
}