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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 COMPONENTS_GCM_DRIVER_GCM_CHANNEL_STATUS_REQUEST_H_
      6 #define COMPONENTS_GCM_DRIVER_GCM_CHANNEL_STATUS_REQUEST_H_
      7 
      8 #include "base/callback.h"
      9 #include "base/compiler_specific.h"
     10 #include "base/gtest_prod_util.h"
     11 #include "base/macros.h"
     12 #include "base/memory/ref_counted.h"
     13 #include "base/memory/scoped_ptr.h"
     14 #include "base/memory/weak_ptr.h"
     15 #include "net/base/backoff_entry.h"
     16 #include "net/url_request/url_fetcher_delegate.h"
     17 #include "net/url_request/url_request_context_getter.h"
     18 
     19 namespace net {
     20 class URLRequestContextGetter;
     21 }
     22 
     23 namespace gcm {
     24 
     25 // Defines the request to talk with the server to determine if the GCM support
     26 // should be enabled.
     27 class GCMChannelStatusRequest : public net::URLFetcherDelegate {
     28  public:
     29   // Callback completing the channel status request.
     30   // |update_received|: use the existing values if it is false which means no
     31   //                    update is received.
     32   // |enabled|: indicates if GCM is enabled (allowed to run) or not.
     33   // |poll_interval_seconds|: the interval in seconds to start next poll
     34   //                          request.
     35   typedef base::Callback<void(bool update_received,
     36                               bool enabled,
     37                               int poll_interval_seconds)>
     38       GCMChannelStatusRequestCallback;
     39 
     40   GCMChannelStatusRequest(
     41       const scoped_refptr<net::URLRequestContextGetter>& request_context_getter,
     42       const std::string& channel_status_request_url,
     43       const std::string& user_agent,
     44       const GCMChannelStatusRequestCallback& callback);
     45   virtual ~GCMChannelStatusRequest();
     46 
     47   void Start();
     48 
     49   static int default_poll_interval_seconds();
     50   static int min_poll_interval_seconds();
     51 
     52  private:
     53   FRIEND_TEST_ALL_PREFIXES(GCMChannelStatusRequestTest, RequestData);
     54 
     55   // Overridden from URLFetcherDelegate:
     56   virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
     57 
     58   bool ParseResponse(const net::URLFetcher* source);
     59   void RetryWithBackoff(bool update_backoff);
     60 
     61   scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
     62   const std::string channel_status_request_url_;
     63   const std::string user_agent_;
     64   GCMChannelStatusRequestCallback callback_;
     65   scoped_ptr<net::URLFetcher> url_fetcher_;
     66   net::BackoffEntry backoff_entry_;
     67   base::WeakPtrFactory<GCMChannelStatusRequest> weak_ptr_factory_;
     68 
     69   DISALLOW_COPY_AND_ASSIGN(GCMChannelStatusRequest);
     70 };
     71 
     72 }  // namespace gcm
     73 
     74 #endif  // COMPONENTS_GCM_DRIVER_GCM_CHANNEL_STATUS_REQUEST_H_
     75