chromecast/net/connectivity_checker_impl.h

   1 // Copyright 2015 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 CHROMECAST_NET_CONNECTIVITY_CHECKER_IMPL_H_
   6 #define CHROMECAST_NET_CONNECTIVITY_CHECKER_IMPL_H_
   7
   8 #include "base/cancelable_callback.h"
   9 #include "chromecast/net/connectivity_checker.h"
  10 #include "net/base/network_change_notifier.h"
  11 #include "net/url_request/url_request.h"
  12
  13 class GURL;
  14
  15 namespace base {
  16 class SingleThreadTaskRunner;
  17 }
  18
  19 namespace net {
  20 class SSLInfo;
  21 class URLRequest;
  22 class URLRequestContext;
  23 }
  24
  25 namespace chromecast {
  26
  27 // Simple class to check network connectivity by sending a HEAD http request
  28 // to given url.
  29 class ConnectivityCheckerImpl
  30     : public ConnectivityChecker,
  31       public net::URLRequest::Delegate,
  32       public net::NetworkChangeNotifier::NetworkChangeObserver {
  33  public:
  34   explicit ConnectivityCheckerImpl(
  35       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
  36
  37   // ConnectivityChecker implementation:
  38   bool Connected() const override;
  39   void Check() override;
  40
  41  protected:
  42   ~ConnectivityCheckerImpl() override;
  43
  44  private:
  45   // UrlRequest::Delegate implementation:
  46   void OnResponseStarted(net::URLRequest* request) override;
  47   void OnReadCompleted(net::URLRequest* request, int bytes_read) override;
  48   void OnSSLCertificateError(net::URLRequest* request,
  49                              const net::SSLInfo& ssl_info,
  50                              bool fatal) override;
  51
  52   // Initializes ConnectivityChecker
  53   void Initialize();
  54
  55   // net::NetworkChangeNotifier::NetworkChangeObserver implementation:
  56   void OnNetworkChanged(
  57       net::NetworkChangeNotifier::ConnectionType type) override;
  58
  59   // Cancels current connectivity checking in progress.
  60   void Cancel();
  61
  62   // Sets connectivity and alerts observers if it has changed
  63   void SetConnected(bool connected);
  64
  65   // Called when URL request failed.
  66   void OnUrlRequestError();
  67
  68   // Called when URL request timed out.
  69   void OnUrlRequestTimeout();
  70
  71   scoped_ptr<GURL> connectivity_check_url_;
  72   scoped_ptr<net::URLRequestContext> url_request_context_;
  73   scoped_ptr<net::URLRequest> url_request_;
  74   const scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
  75   bool connected_;
  76   // Number of connectivity check errors.
  77   unsigned int check_errors_;
  78   base::CancelableCallback<void()> timeout_;
  79
  80   DISALLOW_COPY_AND_ASSIGN(ConnectivityCheckerImpl);
  81 };
  82
  83 }  // namespace chromecast
  84
  85 #endif  // CHROMECAST_NET_CONNECTIVITY_CHECKER_IMPL_H_