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/*
* Copyright (C) 2009, 2012 Ericsson AB. All rights reserved.
* Copyright (C) 2010 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name of Ericsson nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EventSource_h
#define EventSource_h
#include "core/dom/ActiveDOMObject.h"
#include "core/events/EventTarget.h"
#include "core/loader/ThreadableLoaderClient.h"
#include "platform/Timer.h"
#include "platform/heap/Handle.h"
#include "platform/weborigin/KURL.h"
#include "wtf/RefPtr.h"
#include "wtf/Vector.h"
namespace blink {
class EventSourceInit;
class ExceptionState;
class MessageEvent;
class ResourceResponse;
class TextResourceDecoder;
class ThreadableLoader;
class EventSource final : public EventTargetWithInlineData, public RefCountedWillBeNoBase<EventSource>, private ThreadableLoaderClient, public ActiveDOMObject {
DEFINE_WRAPPERTYPEINFO();
REFCOUNTED_EVENT_TARGET(EventSource);
WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(EventSource);
WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
public:
static PassRefPtrWillBeRawPtr<EventSource> create(ExecutionContext*, const String& url, const EventSourceInit&, ExceptionState&);
virtual ~EventSource();
static const unsigned long long defaultReconnectDelay;
String url() const;
bool withCredentials() const;
typedef short State;
static const State CONNECTING = 0;
static const State OPEN = 1;
static const State CLOSED = 2;
State readyState() const;
DEFINE_ATTRIBUTE_EVENT_LISTENER(open);
DEFINE_ATTRIBUTE_EVENT_LISTENER(message);
DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
void close();
virtual const AtomicString& interfaceName() const override;
virtual ExecutionContext* executionContext() const override;
// ActiveDOMObject
//
// Note: suspend() is noop since ScopedPageLoadDeferrer calls
// Page::setDefersLoading() and it defers delivery of events from the
// loader, and therefore the methods of this class for receiving
// asynchronous events from the loader won't be invoked.
virtual void stop() override;
virtual bool hasPendingActivity() const override;
virtual void trace(Visitor*) override;
private:
EventSource(ExecutionContext*, const KURL&, const EventSourceInit&);
virtual void didReceiveResponse(unsigned long, const ResourceResponse&, PassOwnPtr<WebDataConsumerHandle>) override;
virtual void didReceiveData(const char*, unsigned) override;
virtual void didFinishLoading(unsigned long, double) override;
virtual void didFail(const ResourceError&) override;
virtual void didFailAccessControlCheck(const ResourceError&) override;
virtual void didFailRedirectCheck() override;
void scheduleInitialConnect();
void connect();
void networkRequestEnded();
void scheduleReconnect();
void connectTimerFired(Timer<EventSource>*);
void abortConnectionAttempt();
void parseEventStream();
void parseEventStreamLine(unsigned pos, int fieldLength, int lineLength);
PassRefPtrWillBeRawPtr<MessageEvent> createMessageEvent();
KURL m_url;
bool m_withCredentials;
State m_state;
OwnPtr<TextResourceDecoder> m_decoder;
RefPtr<ThreadableLoader> m_loader;
Timer<EventSource> m_connectTimer;
Vector<UChar> m_receiveBuf;
bool m_discardTrailingNewline;
bool m_requestInFlight;
AtomicString m_eventName;
Vector<UChar> m_data;
AtomicString m_currentlyParsedEventId;
AtomicString m_lastEventId;
unsigned long long m_reconnectDelay;
String m_eventStreamOrigin;
};
} // namespace blink
#endif // EventSource_h
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