Add support for user info on ws: and wss: URLs

sdk/lib/io/websocket_impl.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart.io;
 
 const String _webSocketGUID = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
 
 // Matches _WebSocketOpcode.
 class _WebSocketMessageType {
@@ skipping 757 matching lines @@
   Timer _closeTimer;
 
   static final HttpClient _httpClient = new HttpClient();
 
   static Future<WebSocket> connect(
       String url, Iterable<String> protocols, Map<String, dynamic> headers) {
     Uri uri = Uri.parse(url);
     if (uri.scheme != "ws" && uri.scheme != "wss") {
       throw new WebSocketException("Unsupported URL scheme '${uri.scheme}'");
     }
-    if (uri.userInfo != "") {
-      throw new WebSocketException("Unsupported user info '${uri.userInfo}'");
-    }
 
     Random random = new Random();
     // Generate 16 random bytes.
     Uint8List nonceData = new Uint8List(16);
     for (int i = 0; i < 16; i++) {
       nonceData[i] = random.nextInt(256);
     }
     String nonce = _CryptoUtils.bytesToBase64(nonceData);
 
     uri = new Uri(scheme: uri.scheme == "wss" ? "https" : "http",
                   userInfo: uri.userInfo,
                   host: uri.host,
                   port: uri.port,
                   path: uri.path,
                   query: uri.query,
                   fragment: uri.fragment);
     return _httpClient.openUrl("GET", uri)
       .then((request) {
+        if (uri.userInfo != null && !uri.userInfo.isEmpty) {
+          // If the URL contains user information use that for basic
+          // authorization.
+          String auth =
+          _CryptoUtils.bytesToBase64(UTF8.encode(uri.userInfo));
+          request.headers.set(HttpHeaders.AUTHORIZATION, "Basic $auth");
+        }
         if (headers != null) {
           headers.forEach((field, value) => request.headers.add(field, value));
         }
         // Setup the initial handshake.
         request.headers
             ..set(HttpHeaders.CONNECTION, "Upgrade")
             ..set(HttpHeaders.UPGRADE, "websocket")
             ..set("Sec-WebSocket-Key", nonce)
             ..set("Cache-Control", "no-cache")
             ..set("Sec-WebSocket-Version", "13");
@@ skipping 203 matching lines @@
            (code < WebSocketStatus.NORMAL_CLOSURE ||
             code == WebSocketStatus.RESERVED_1004 ||
             code == WebSocketStatus.NO_STATUS_RECEIVED ||
             code == WebSocketStatus.ABNORMAL_CLOSURE ||
             (code > WebSocketStatus.INTERNAL_SERVER_ERROR &&
              code < WebSocketStatus.RESERVED_1015) ||
             (code >= WebSocketStatus.RESERVED_1015 &&
              code < 3000));
   }
 }