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      1 // Copyright 2014 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 CONTENT_BROWSER_APPCACHE_APPCACHE_INTERCEPTOR_H_
      6 #define CONTENT_BROWSER_APPCACHE_APPCACHE_INTERCEPTOR_H_
      7 
      8 #include "base/memory/singleton.h"
      9 #include "content/common/content_export.h"
     10 #include "content/public/common/resource_type.h"
     11 #include "net/url_request/url_request.h"
     12 #include "url/gurl.h"
     13 
     14 namespace content {
     15 class AppCacheRequestHandler;
     16 class AppCacheServiceImpl;
     17 
     18 // An interceptor to hijack requests and potentially service them out of
     19 // the appcache.
     20 class CONTENT_EXPORT AppCacheInterceptor
     21     : public net::URLRequest::Interceptor {
     22  public:
     23   // Registers a singleton instance with the net library.
     24   // Should be called early in the IO thread prior to initiating requests.
     25   static void EnsureRegistered() {
     26     CHECK(GetInstance());
     27   }
     28 
     29   // Must be called to make a request eligible for retrieval from an appcache.
     30   static void SetExtraRequestInfo(net::URLRequest* request,
     31                                   AppCacheServiceImpl* service,
     32                                   int process_id,
     33                                   int host_id,
     34                                   ResourceType resource_type);
     35 
     36   // May be called after response headers are complete to retrieve extra
     37   // info about the response.
     38   static void GetExtraResponseInfo(net::URLRequest* request,
     39                                    int64* cache_id,
     40                                    GURL* manifest_url);
     41 
     42   // Methods to support cross site navigations.
     43   static void PrepareForCrossSiteTransfer(net::URLRequest* request,
     44                                           int old_process_id);
     45   static void CompleteCrossSiteTransfer(net::URLRequest* request,
     46                                         int new_process_id,
     47                                         int new_host_id);
     48 
     49   static AppCacheInterceptor* GetInstance();
     50 
     51  protected:
     52   // Override from net::URLRequest::Interceptor:
     53   virtual net::URLRequestJob* MaybeIntercept(
     54       net::URLRequest* request,
     55       net::NetworkDelegate* network_delegate) OVERRIDE;
     56   virtual net::URLRequestJob* MaybeInterceptResponse(
     57       net::URLRequest* request,
     58       net::NetworkDelegate* network_delegate) OVERRIDE;
     59   virtual net::URLRequestJob* MaybeInterceptRedirect(
     60       net::URLRequest* request,
     61       net::NetworkDelegate* network_delegate,
     62       const GURL& location) OVERRIDE;
     63 
     64  private:
     65   friend struct DefaultSingletonTraits<AppCacheInterceptor>;
     66 
     67   AppCacheInterceptor();
     68   virtual ~AppCacheInterceptor();
     69 
     70   static void SetHandler(net::URLRequest* request,
     71                          AppCacheRequestHandler* handler);
     72   static AppCacheRequestHandler* GetHandler(net::URLRequest* request);
     73 
     74   DISALLOW_COPY_AND_ASSIGN(AppCacheInterceptor);
     75 };
     76 
     77 }  // namespace content
     78 
     79 #endif  // CONTENT_BROWSER_APPCACHE_APPCACHE_INTERCEPTOR_H_
     80