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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROMECAST_NET_CONNECTIVITY_CHECKER_H_
#define CHROMECAST_NET_CONNECTIVITY_CHECKER_H_
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "net/base/network_change_notifier.h"
#include "net/url_request/url_request.h"
class GURL;
namespace base {
class MessageLoopProxy;
}
namespace net {
class SSLInfo;
class URLRequestContext;
}
namespace chromecast {
// Simple class to check network connectivity by sending a HEAD http request
// to given url.
class ConnectivityChecker
: public base::RefCountedThreadSafe<ConnectivityChecker>,
public net::URLRequest::Delegate,
public net::NetworkChangeNotifier::ConnectionTypeObserver,
public net::NetworkChangeNotifier::IPAddressObserver {
public:
class ConnectivityObserver {
public:
// Will be called when internet connectivity changes
virtual void OnConnectivityChanged(bool connected) = 0;
protected:
ConnectivityObserver() {}
virtual ~ConnectivityObserver() {}
private:
DISALLOW_COPY_AND_ASSIGN(ConnectivityObserver);
};
explicit ConnectivityChecker(
const scoped_refptr<base::MessageLoopProxy>& loop_proxy);
void AddConnectivityObserver(ConnectivityObserver* observer);
void RemoveConnectivityObserver(ConnectivityObserver* observer);
// Returns if there is internet connectivity
bool Connected() const;
// Checks for connectivity
void Check();
protected:
~ConnectivityChecker() override;
private:
friend class base::RefCountedThreadSafe<ConnectivityChecker>;
// UrlRequest::Delegate implementation:
void OnResponseStarted(net::URLRequest* request) override;
void OnReadCompleted(net::URLRequest* request, int bytes_read) override;
void OnSSLCertificateError(net::URLRequest* request,
const net::SSLInfo& ssl_info,
bool fatal) override;
// Initializes ConnectivityChecker
void Initialize();
// NetworkChangeNotifier::ConnectionTypeObserver implementation:
void OnConnectionTypeChanged(
net::NetworkChangeNotifier::ConnectionType type) override;
// net::NetworkChangeNotifier::IPAddressObserver implementation:
void OnIPAddressChanged() override;
// Cancels current connectivity checking in progress.
void Cancel();
// Sets connectivity and alerts observers if it has changed
void SetConnectivity(bool connected);
// Called when URL request failed.
void OnUrlRequestError();
scoped_ptr<GURL> connectivity_check_url_;
scoped_ptr<net::URLRequestContext> url_request_context_;
scoped_ptr<net::URLRequest> url_request_;
const scoped_refptr<ObserverListThreadSafe<ConnectivityObserver> >
connectivity_observer_list_;
const scoped_refptr<base::MessageLoopProxy> loop_proxy_;
bool connected_;
// Number of connectivity check errors.
unsigned int check_errors_;
DISALLOW_COPY_AND_ASSIGN(ConnectivityChecker);
};
} // namespace chromecast
#endif // CHROMECAST_NET_CONNECTIVITY_CHECKER_H_
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