Add HttpRequest::requestedUri.

sdk/lib/io/http.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;
 
 /**
  * HTTP status codes.
  */
 abstract class HttpStatus {
@@ skipping 772 matching lines @@
 
   /**
    * The URI for the request (read-only).
    *
    * This provides access to the
    * path, query string, and fragment identifier for the request.
    */
   Uri get uri;
 
   /**
+   * The requested URI for the request (read-only).
+   *
+   * The returend URI is reconstructed by using http-header fields, to access
+   * otherwise lost information, e.g. host and scheme.
+   *
+   * To reconstruct the scheme, first 'X-Forwarded-Proto' is checked, and then
+   * falling back to server type.
+   *
+   * To reconstruct the host, fisrt 'X-Forwarded-Host' is checked, then 'Host'
+   * and finally calling back to server.
+   */
+  Uri get requestedUri;
+
+  /**
    * The request headers (read-only).
    */
   HttpHeaders get headers;
 
   /**
    * The cookies in the request, from the Cookie headers (read-only).
    */
   List<Cookie> get cookies;
 
   /**
@@ skipping 796 matching lines @@
   final String message;
   final List<RedirectInfo> redirects;
 
   const RedirectException(String this.message,
                           List<RedirectInfo> this.redirects);
 
   String toString() => "RedirectException: $message";
 
   Uri get uri => redirects.last.location;
 }