chrome/browser/renderer_host/offline_resource_throttle.h

   1 // Copyright (c) 2012 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_BROWSER_RENDERER_HOST_OFFLINE_RESOURCE_THROTTLE_H_
   6 #define CHROME_BROWSER_RENDERER_HOST_OFFLINE_RESOURCE_THROTTLE_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/ref_counted.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "chrome/browser/chromeos/offline/offline_load_page.h"
  13 #include "content/public/browser/resource_throttle.h"
  14 #include "net/base/completion_callback.h"
  15
  16 namespace appcache {
  17 class AppCacheService;
  18 }
  19
  20 namespace net {
  21 class URLRequest;
  22 }
  23 // Used to show an offline interstitial page when the network is not available.
  24 class OfflineResourceThrottle
  25     : public content::ResourceThrottle,
  26       public base::SupportsWeakPtr<OfflineResourceThrottle> {
  27  public:
  28   OfflineResourceThrottle(int render_process_id,
  29                           int render_view_id,
  30                           net::URLRequest* request,
  31                           appcache::AppCacheService* appcache_service);
  32   virtual ~OfflineResourceThrottle();
  33
  34   // content::ResourceThrottle implementation:
  35   virtual void WillStartRequest(bool* defer) OVERRIDE;
  36
  37  private:
  38   // OfflineLoadPage callback.
  39   void OnBlockingPageComplete(bool proceed);
  40
  41   // Erase the state associated with a deferred load request.
  42   void ClearRequestInfo();
  43   bool IsRemote(const GURL& url) const;
  44
  45   // True if chrome should show the offline page.
  46   bool ShouldShowOfflinePage(const GURL& url) const;
  47
  48   // A callback to tell if an appcache exists.
  49   void OnCanHandleOfflineComplete(int rv);
  50
  51   int render_process_id_;
  52   int render_view_id_;
  53   net::URLRequest* request_;
  54   // Safe to keep a pointer around since AppCacheService outlives all requests.
  55   appcache::AppCacheService* appcache_service_;
  56   net::CancelableCompletionCallback appcache_completion_callback_;
  57
  58   DISALLOW_COPY_AND_ASSIGN(OfflineResourceThrottle);
  59 };
  60
  61 #endif  // CHROME_BROWSER_RENDERER_HOST_OFFLINE_RESOURCE_THROTTLE_H_