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(net::URLRequest* request, 29 appcache::AppCacheService* appcache_service); 30 virtual ~OfflineResourceThrottle(); 31 32 // content::ResourceThrottle implementation: 33 virtual void WillStartRequest(bool* defer) OVERRIDE; 34 virtual const char* GetNameForLogging() const OVERRIDE; 35 36 private: 37 // OfflineLoadPage callback. 38 void OnBlockingPageComplete(bool proceed); 39 40 // Erase the state associated with a deferred load request. 41 void ClearRequestInfo(); 42 bool IsRemote(const GURL& url) const; 43 44 // True if chrome should show the offline page. 45 bool ShouldShowOfflinePage(const GURL& url) const; 46 47 // A callback to tell if an appcache exists. 48 void OnCanHandleOfflineComplete(int rv); 49 50 net::URLRequest* request_; 51 // Safe to keep a pointer around since AppCacheService outlives all requests. 52 appcache::AppCacheService* appcache_service_; 53 net::CancelableCompletionCallback appcache_completion_callback_; 54 55 DISALLOW_COPY_AND_ASSIGN(OfflineResourceThrottle); 56 }; 57 58 #endif // CHROME_BROWSER_RENDERER_HOST_OFFLINE_RESOURCE_THROTTLE_H_ 59