chrome/browser/net/resource_prefetch_predictor_observer.h

   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 CHROME_BROWSER_NET_RESOURCE_PREFETCH_PREDICTOR_OBSERVER_H_
   6 #define CHROME_BROWSER_NET_RESOURCE_PREFETCH_PREDICTOR_OBSERVER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/weak_ptr.h"
  10 #include "chrome/browser/predictors/resource_prefetch_predictor.h"
  11 #include "content/public/common/resource_type.h"
  12
  13 namespace net {
  14 class URLRequest;
  15 }
  16
  17 class GURL;
  18
  19 namespace chrome_browser_net {
  20
  21 // Observes resource requests in the ResourceDispatcherHostDelegate and notifies
  22 // the ResourcePrefetchPredictor about the ones it is interested in.
  23 //  - Has an instance per profile, and is owned by the corresponding
  24 //    ProfileIOData.
  25 //  - Needs to be constructed on UI thread. Rest of the functions can only be
  26 //    called on the IO thread. Can be destroyed on UI or IO thread.
  27 class ResourcePrefetchPredictorObserver {
  28  public:
  29   explicit ResourcePrefetchPredictorObserver(
  30       predictors::ResourcePrefetchPredictor* predictor);
  31   ~ResourcePrefetchPredictorObserver();
  32
  33   // Parts of the ResourceDispatcherHostDelegate that we want to observe.
  34   void OnRequestStarted(net::URLRequest* request,
  35                         content::ResourceType resource_type,
  36                         int child_id,
  37                         int frame_id);
  38   void OnRequestRedirected(const GURL& redirect_url, net::URLRequest* request);
  39   void OnResponseStarted(net::URLRequest* request);
  40
  41  private:
  42   // Owned by profile.
  43   base::WeakPtr<predictors::ResourcePrefetchPredictor> predictor_;
  44
  45   DISALLOW_COPY_AND_ASSIGN(ResourcePrefetchPredictorObserver);
  46 };
  47
  48 }  // namespace chrome_browser_net
  49
  50 #endif  // CHROME_BROWSER_NET_RESOURCE_PREFETCH_PREDICTOR_OBSERVER_H_