Add option to HttpClient to turn of auto uncompression

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 {
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    * Increasing this number may lower performance and take up unwanted
    * system resources.
    *
    * To disable, set to `null`.
    *
    * Default is `null`.
    */
   int maxConnectionsPerHost;
 
   /**
+   * Get and set whether the body of a response will be automatically
+   * uncompressed.
+   *
+   * The body of an HTTP response can be compressed. In most
+   * situations providing the un-compressed body is most
+   * convenient. Therefore the default behavior is to un-compress the
+   * body. However in some situations (e.g. implementing a transparent
+   * proxy) keeping the uncompressed stream is required.
+   *
+   * NOTE: Headers in from the response is never modified. This means
+   * that when automatic un-compression is turned on the value of the
+   * header `Content-Length` will reflect the length of the original
+   * compressed body. Likewise the header `Content-Encoding` will also
+   * have the original value indicating compression.
+   *
+   * NOTE: Automatic un-compression is only performed if the
+   * `Content-Encoding` header value is `gzip`.
+   *
+   * This value affects all responses produced by this client after the
+   * value is changed.
+   *
+   * To disable, set to `false`.
+   *
+   * Default is `true`.
+   */
+  bool autoUncompress;
+
+  /**
    * Set and get the default value of the `User-Agent` header for all requests
    * generated by this [HttpClient]. The default value is
    * `Dart/<version> (dart:io)`.
    *
    * If the userAgent is set to `null`, no default `User-Agent` header will be
    * added to each request.
    */
   String userAgent;
 
   factory HttpClient() => new _HttpClient();
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 class RedirectException implements HttpException {
   final String message;
   final List<RedirectInfo> redirects;
 
   const RedirectException(this.message, this.redirects);
 
   String toString() => "RedirectException: $message";
 
   Uri get uri => redirects.last.location;
 }