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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.
*/
#pragma once
#include "ActiveDOMObject.h"
#include "EventLoop.h"
#include "EventTarget.h"
#include "ExceptionOr.h"
#include "ThreadableLoaderClient.h"
#include "Timer.h"
#include <wtf/URL.h>
#include <wtf/Vector.h>
namespace WebCore {
class MessageEvent;
class TextResourceDecoder;
class ThreadableLoader;
class EventSource final : public RefCounted<EventSource>, public EventTarget, private ThreadableLoaderClient, public ActiveDOMObject {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(EventSource);
WTF_OVERRIDE_DELETE_FOR_CHECKED_PTR(EventSource);
public:
void ref() const final { RefCounted::ref(); }
void deref() const final { RefCounted::deref(); }
struct Init {
bool withCredentials;
};
static ExceptionOr<Ref<EventSource>> create(ScriptExecutionContext&, const String& url, const Init&);
virtual ~EventSource();
USING_CAN_MAKE_WEAKPTR(EventTarget);
const String& url() const;
bool withCredentials() const;
using State = short;
static const State CONNECTING = 0;
static const State OPEN = 1;
static const State CLOSED = 2;
State readyState() const;
void close();
private:
EventSource(ScriptExecutionContext&, const URL&, const Init&);
enum EventTargetInterfaceType eventTargetInterface() const final { return EventTargetInterfaceType::EventSource; }
ScriptExecutionContext* scriptExecutionContext() const final { return ActiveDOMObject::scriptExecutionContext(); }
void refEventTarget() final { ref(); }
void derefEventTarget() final { deref(); }
void dispatchErrorEvent();
void doExplicitLoadCancellation();
// ThreadableLoaderClient
void didReceiveResponse(ScriptExecutionContextIdentifier, std::optional<ResourceLoaderIdentifier>, const ResourceResponse&) final;
void didReceiveData(const SharedBuffer&) final;
void didFinishLoading(ScriptExecutionContextIdentifier, std::optional<ResourceLoaderIdentifier>, const NetworkLoadMetrics&) final;
void didFail(std::optional<ScriptExecutionContextIdentifier>, const ResourceError&) final;
// ActiveDOMObject
void stop() final;
void suspend(ReasonForSuspension) final;
void resume() final;
bool virtualHasPendingActivity() const final;
void connect();
void networkRequestEnded();
void scheduleInitialConnect();
void scheduleReconnect();
void abortConnectionAttempt();
void parseEventStream();
void parseEventStreamLine(unsigned position, std::optional<unsigned> fieldLength, unsigned lineLength);
void dispatchMessageEvent();
bool responseIsValid(const ResourceResponse&) const;
static const uint64_t defaultReconnectDelay;
URL m_url;
bool m_withCredentials;
State m_state { CONNECTING };
Ref<TextResourceDecoder> m_decoder;
RefPtr<ThreadableLoader> m_loader;
EventLoopTimerHandle m_connectTimer;
Vector<UChar> m_receiveBuffer;
bool m_discardTrailingNewline { false };
bool m_requestInFlight { false };
bool m_isSuspendedForBackForwardCache { false };
bool m_isDoingExplicitCancellation { false };
bool m_shouldReconnectOnResume { false };
AtomString m_eventName;
Vector<UChar> m_data;
String m_currentlyParsedEventId;
String m_lastEventId;
uint64_t m_reconnectDelay { defaultReconnectDelay };
String m_eventStreamOrigin;
};
inline const String& EventSource::url() const
{
return m_url.string();
}
inline bool EventSource::withCredentials() const
{
return m_withCredentials;
}
inline EventSource::State EventSource::readyState() const
{
return m_state;
}
} // namespace WebCore
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