chrome/renderer/playback_extension.h

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_RENDERER_PLAYBACK_EXTENSION_H_
   6 #define CHROME_RENDERER_PLAYBACK_EXTENSION_H_
   7
   8 namespace v8 {
   9 class Extension;
  10 }
  11
  12 namespace extensions_v8 {
  13
  14 // Inject code which overrides a few common JS functions for implementing
  15 // randomness.  In order to implement effective record & playback of
  16 // websites, it is important that the URLs not change.  Many popular web
  17 // based apps use randomness in URLs to unique-ify urls for proxies.
  18 // Unfortunately, this breaks playback.
  19 // To work around this, we take the two most common client-side randomness
  20 // generators and make them constant.  They really need to be constant
  21 // (rather than a constant seed followed by constant change)
  22 // because the playback mode wants flexibility in how it plays them back
  23 // and cannot always guarantee that requests for randomness are played back
  24 // in exactly the same order in which they were recorded.
  25 class PlaybackExtension {
  26  public:
  27   static v8::Extension* Get();
  28 };
  29
  30 }  // namespace extensions_v8
  31
  32 #endif  // CHROME_RENDERER_PLAYBACK_EXTENSION_H_