Enable WebSocket secure connection using "wss" in W3C interface. Add testing of secure WebSocket co…

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";
 
 class _WebSocketMessageType {
   static const int NONE = 0;
@@ skipping 749 matching lines @@
   Function _onOpen;
   Function _onNoUpgrade;
   HttpClientConnection _conn;
   String _nonce;
 }
 
 
 class _WebSocket implements WebSocket {
   _WebSocket(String url, [protocols]) {
     Uri uri = new Uri.fromString(url);
-    if (uri.scheme != "ws") {
+    if (uri.scheme != "ws" && uri.scheme != "wss") {
       throw new WebSocketException("Unsupported URL scheme ${uri.scheme}");
     }
     if (uri.userInfo != "") {
       throw new WebSocketException("Unsupported user info ${uri.userInfo}");
     }
     int port = uri.port == 0 ? HttpClient.DEFAULT_HTTP_PORT : uri.port;
     String path = uri.path;
     if (path.length == 0) path = "/";
     if (uri.query != "") {
       if (uri.fragment != "") {
         path = "${path}?${uri.query}#${uri.fragment}";
       } else {
         path = "${path}?${uri.query}";
       }
     }
 
     HttpClient client = new HttpClient();
-    HttpClientConnection conn = client.open("GET", uri.domain, port, path);
+    bool secure = (uri.scheme == 'wss');
+    HttpClientConnection conn = client.openUrl("GET",
+        new Uri.fromComponents(scheme: secure ? "https" : "http",
+                               domain: uri.domain,
+                               port: port,
+                               path: path));
     if (protocols is String) protocols = [protocols];
     _wsconn = new WebSocketClientConnection(conn, protocols);
     _wsconn.onOpen = () {
       // HTTP client not needed after socket have been detached.
       client.shutdown();
       client = null;
       _readyState = WebSocket.OPEN;
       if (_onopen != null) _onopen();
     };
     _wsconn.onMessage = (message) {
@@ skipping 63 matching lines @@
 
 class _WebSocketCloseEvent implements CloseEvent {
   _WebSocketCloseEvent(this._wasClean, this._code, this._reason);
   bool get wasClean => _wasClean;
   int get code => _code;
   String get reason => _reason;
   bool _wasClean;
   int _code;
   String _reason;
 }