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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 THIRD_PARTY_BLINK_RENDERER_MODULES_EVENTSOURCE_EVENT_SOURCE_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_EVENTSOURCE_EVENT_SOURCE_H_
#include <memory>
#include "third_party/blink/renderer/bindings/core/v8/active_script_wrappable.h"
#include "third_party/blink/renderer/core/dom/context_lifecycle_observer.h"
#include "third_party/blink/renderer/core/dom/events/event_target.h"
#include "third_party/blink/renderer/core/loader/threadable_loader.h"
#include "third_party/blink/renderer/core/loader/threadable_loader_client.h"
#include "third_party/blink/renderer/modules/eventsource/event_source_parser.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "third_party/blink/renderer/platform/timer.h"
#include "third_party/blink/renderer/platform/weborigin/kurl.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"
namespace blink {
class EventSourceInit;
class ExceptionState;
class ResourceResponse;
class MODULES_EXPORT EventSource final
: public EventTargetWithInlineData,
private ThreadableLoaderClient,
public ActiveScriptWrappable<EventSource>,
public ContextLifecycleObserver,
public EventSourceParser::Client {
DEFINE_WRAPPERTYPEINFO();
USING_GARBAGE_COLLECTED_MIXIN(EventSource);
USING_PRE_FINALIZER(EventSource, Dispose);
public:
static EventSource* Create(ExecutionContext*,
const String& url,
const EventSourceInit&,
ExceptionState&);
~EventSource() override;
static const unsigned long long kDefaultReconnectDelay;
String url() const;
bool withCredentials() const;
enum State : short { kConnecting = 0, kOpen = 1, kClosed = 2 };
State readyState() const;
DEFINE_ATTRIBUTE_EVENT_LISTENER(open);
DEFINE_ATTRIBUTE_EVENT_LISTENER(message);
DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
void close();
const AtomicString& InterfaceName() const override;
ExecutionContext* GetExecutionContext() const override;
// ContextLifecycleObserver
//
// Note: We don't need to inherit from PausableObject 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.
void ContextDestroyed(ExecutionContext*) override;
// ScriptWrappable
bool HasPendingActivity() const final;
void Trace(blink::Visitor*) override;
private:
EventSource(ExecutionContext*, const KURL&, const EventSourceInit&);
void Dispose();
void DidReceiveResponse(unsigned long,
const ResourceResponse&,
std::unique_ptr<WebDataConsumerHandle>) override;
void DidReceiveData(const char*, unsigned) override;
void DidFinishLoading(unsigned long) override;
void DidFail(const ResourceError&) override;
void DidFailRedirectCheck() override;
void OnMessageEvent(const AtomicString& event,
const String& data,
const AtomicString& id) override;
void OnReconnectionTimeSet(unsigned long long reconnection_time) override;
void ScheduleInitialConnect();
void Connect();
void NetworkRequestEnded();
void ScheduleReconnect();
void ConnectTimerFired(TimerBase*);
void AbortConnectionAttempt();
// The original URL specified when constructing EventSource instance. Used
// for the 'url' attribute getter.
const KURL url_;
// The URL used to connect to the server, which may be different from
// |m_url| as it may be redirected.
KURL current_url_;
bool with_credentials_;
State state_;
Member<EventSourceParser> parser_;
Member<ThreadableLoader> loader_;
TaskRunnerTimer<EventSource> connect_timer_;
unsigned long long reconnect_delay_;
String event_stream_origin_;
unsigned long resource_identifier_ = 0;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_EVENTSOURCE_EVENT_SOURCE_H_
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