chrome/renderer/security_filter_peer.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_SECURITY_FILTER_PEER_H_
   6 #define CHROME_RENDERER_SECURITY_FILTER_PEER_H_
   7
   8 #include "webkit/child/resource_loader_bridge.h"
   9
  10 // The SecurityFilterPeer is a proxy to a
  11 // webkit_glue::ResourceLoaderBridge::Peer instance.  It is used to pre-process
  12 // unsafe resources (such as mixed-content resource).
  13 // Call the factory method CreateSecurityFilterPeer() to obtain an instance of
  14 // SecurityFilterPeer based on the original Peer.
  15 // NOTE: subclasses should insure they delete themselves at the end of the
  16 // OnReceiveComplete call.
  17 class SecurityFilterPeer : public webkit_glue::ResourceLoaderBridge::Peer {
  18  public:
  19   virtual ~SecurityFilterPeer();
  20
  21   static SecurityFilterPeer* CreateSecurityFilterPeerForDeniedRequest(
  22       ResourceType::Type resource_type,
  23       webkit_glue::ResourceLoaderBridge::Peer* peer,
  24       int os_error);
  25
  26   static SecurityFilterPeer* CreateSecurityFilterPeerForFrame(
  27       webkit_glue::ResourceLoaderBridge::Peer* peer,
  28       int os_error);
  29
  30   // ResourceLoaderBridge::Peer methods.
  31   virtual void OnUploadProgress(uint64 position, uint64 size) OVERRIDE;
  32   virtual bool OnReceivedRedirect(
  33       const GURL& new_url,
  34       const webkit_glue::ResourceResponseInfo& info,
  35       bool* has_new_first_party_for_cookies,
  36       GURL* new_first_party_for_cookies) OVERRIDE;
  37   virtual void OnReceivedResponse(
  38       const webkit_glue::ResourceResponseInfo& info) OVERRIDE;
  39   virtual void OnDownloadedData(int len, int encoded_data_length) OVERRIDE {}
  40   virtual void OnReceivedData(const char* data,
  41                               int data_length,
  42                               int encoded_data_length) OVERRIDE;
  43   virtual void OnCompletedRequest(
  44       int error_code,
  45       bool was_ignored_by_handler,
  46       const std::string& security_info,
  47       const base::TimeTicks& completion_time) OVERRIDE;
  48
  49  protected:
  50   SecurityFilterPeer(webkit_glue::ResourceLoaderBridge* resource_loader_bridge,
  51                      webkit_glue::ResourceLoaderBridge::Peer* peer);
  52
  53   webkit_glue::ResourceLoaderBridge::Peer* original_peer_;
  54   webkit_glue::ResourceLoaderBridge* resource_loader_bridge_;
  55
  56  private:
  57   DISALLOW_COPY_AND_ASSIGN(SecurityFilterPeer);
  58 };
  59
  60 // The BufferedPeer reads all the data of the request into an internal buffer.
  61 // Subclasses should implement DataReady() to process the data as necessary.
  62 class BufferedPeer : public SecurityFilterPeer {
  63  public:
  64   BufferedPeer(webkit_glue::ResourceLoaderBridge* resource_loader_bridge,
  65                webkit_glue::ResourceLoaderBridge::Peer* peer,
  66                const std::string& mime_type);
  67   virtual ~BufferedPeer();
  68
  69   // ResourceLoaderBridge::Peer Implementation.
  70   virtual void OnReceivedResponse(
  71       const webkit_glue::ResourceResponseInfo& info) OVERRIDE;
  72   virtual void OnReceivedData(const char* data,
  73                               int data_length,
  74                               int encoded_data_length) OVERRIDE;
  75   virtual void OnCompletedRequest(
  76       int error_code,
  77       bool was_ignored_by_handler,
  78       const std::string& security_info,
  79       const base::TimeTicks& completion_time) OVERRIDE;
  80
  81  protected:
  82   // Invoked when the entire request has been processed before the data is sent
  83   // to the original peer, giving an opportunity to subclasses to process the
  84   // data in data_.  If this method returns true, the data is fed to the
  85   // original peer, if it returns false, an error is sent instead.
  86   virtual bool DataReady() = 0;
  87
  88   webkit_glue::ResourceResponseInfo response_info_;
  89   std::string data_;
  90
  91  private:
  92   std::string mime_type_;
  93
  94   DISALLOW_COPY_AND_ASSIGN(BufferedPeer);
  95 };
  96
  97 // The ReplaceContentPeer cancels the request and serves the provided data as
  98 // content instead.
  99 // TODO(jcampan): we do not as of now cancel the request, as we do not have
 100 // access to the resource_loader_bridge in the SecurityFilterPeer factory
 101 // method.  For now the resource is still being fetched, but ignored, as once
 102 // we have provided the replacement content, the associated pending request
 103 // in ResourceDispatcher is removed and further OnReceived* notifications are
 104 // ignored.
 105 class ReplaceContentPeer : public SecurityFilterPeer {
 106  public:
 107   ReplaceContentPeer(webkit_glue::ResourceLoaderBridge* resource_loader_bridge,
 108                      webkit_glue::ResourceLoaderBridge::Peer* peer,
 109                      const std::string& mime_type,
 110                      const std::string& data);
 111   virtual ~ReplaceContentPeer();
 112
 113   // ResourceLoaderBridge::Peer Implementation.
 114   virtual void OnReceivedResponse(
 115       const webkit_glue::ResourceResponseInfo& info) OVERRIDE;
 116   virtual void OnReceivedData(const char* data,
 117                               int data_length,
 118                               int encoded_data_length) OVERRIDE;
 119   virtual void OnCompletedRequest(
 120       int error_code,
 121       bool was_ignored_by_handler,
 122       const std::string& security_info,
 123       const base::TimeTicks& completion_time) OVERRIDE;
 124
 125  private:
 126   webkit_glue::ResourceResponseInfo response_info_;
 127   std::string mime_type_;
 128   std::string data_;
 129
 130   DISALLOW_COPY_AND_ASSIGN(ReplaceContentPeer);
 131 };
 132
 133 #endif  // CHROME_RENDERER_SECURITY_FILTER_PEER_H_