Function FromURL

proxy/proxy.go:81–110

FromURL returns a Dialer given a URL specification and an underlying Dialer for it to make network requests.

(u *url.URL, forward Dialer)

// FromURL returns a Dialer given a URL specification and an underlying
// Dialer for it to make network requests.
func FromURL(u *url.URL, forward Dialer) (Dialer, error) {
	var auth *Auth
	if u.User != nil {
		auth = new(Auth)
		auth.User = u.User.Username()
		if p, ok := u.User.Password(); ok {
			auth.Password = p
		}
	}

	switch u.Scheme {
	case "socks5", "socks5h":
		addr := u.Hostname()
		port := u.Port()
		if port == "" {
			port = "1080"
		}
		return SOCKS5("tcp", net.JoinHostPort(addr, port), auth, forward)
	}

	// If the scheme doesn't match any of the built-in schemes, see if it
	// was registered by another package.
	if proxySchemes != nil {
		if f, ok := proxySchemes[u.Scheme]; ok {
			return f(u, forward)
		}
	}

	return nil, errors.New("proxy: unknown scheme: " + u.Scheme)
}

var (
	allProxyEnv = &envOnce{