Add HttpRequest::requestedUri.

sdk/lib/io/http_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 int _HEADERS_BUFFER_SIZE = 8 * 1024;
 
 class _HttpIncoming extends Stream<List<int>> {
   final int _transferLength;
@@ skipping 109 matching lines @@
                                         void onDone(),
                                         bool cancelOnError}) {
     return _incoming.listen(onData,
                             onError: onError,
                             onDone: onDone,
                             cancelOnError: cancelOnError);
   }
 
   Uri get uri => _incoming.uri;
 
+  Uri get absoluteUri {
+    var scheme = _httpConnection._socket is SecureSocket ? "https" : "http";
+    var port = headers.port != null ? headers.port : _httpServer.port;
+    var host = headers.host != null ? headers.host : _httpServer.address.host;
+    return Uri.parse("$scheme://$host:$port$uri");
+  }
+
   String get method => _incoming.method;
 
   HttpSession get session {
     if (_session != null) {
       if (_session._destroyed) {
         // It's destroyed, clear it.
         _session = null;
         // Create new session object by calling recursive.
         return session;
       }
@@ skipping 2437 matching lines @@
 
 String _getHttpVersion() {
   var version = Platform.version;
   // Only include major and minor version numbers.
   int index = version.indexOf('.', version.indexOf('.') + 1);
   version = version.substring(0, index);
   return 'Dart/$version (dart:io)';
 }