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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 "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/bindings/core/v8/active_script_wrappable.h"
#include "third_party/blink/renderer/core/dom/events/event_target.h"
#include "third_party/blink/renderer/core/execution_context/execution_context_lifecycle_observer.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/garbage_collected.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 DOMWrapperWorld;
class EventSourceInit;
class ExceptionState;
class ResourceResponse;
class MODULES_EXPORT EventSource final
: public EventTarget,
public ThreadableLoaderClient,
public ActiveScriptWrappable<EventSource>,
public ExecutionContextLifecycleObserver,
public EventSourceParser::Client {
DEFINE_WRAPPERTYPEINFO();
public:
static EventSource* Create(ExecutionContext*,
const String& url,
const EventSourceInit*,
ExceptionState&);
EventSource(ExecutionContext*, const KURL&, const EventSourceInit*);
~EventSource() override;
static const uint64_t kDefaultReconnectDelay;
String url() const;
bool withCredentials() const;
enum State : int16_t { kConnecting = 0, kOpen = 1, kClosed = 2 };
State readyState() const;
DEFINE_ATTRIBUTE_EVENT_LISTENER(open, kOpen)
DEFINE_ATTRIBUTE_EVENT_LISTENER(message, kMessage)
DEFINE_ATTRIBUTE_EVENT_LISTENER(error, kError)
void close();
const AtomicString& InterfaceName() const override;
ExecutionContext* GetExecutionContext() const override;
// ExecutionContextLifecycleObserver
//
// Note: We don't need to inherit from ExecutionContextLifecycleStateObserver
// 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() override;
// ScriptWrappable
bool HasPendingActivity() const final;
void Trace(Visitor*) const override;
private:
void DidReceiveResponse(uint64_t, const ResourceResponse&) override;
void DidReceiveData(base::span<const char>) override;
void DidFinishLoading(uint64_t) override;
void DidFail(uint64_t, const ResourceError&) override;
void DidFailRedirectCheck(uint64_t) override;
void OnMessageEvent(const AtomicString& event,
const String& data,
const AtomicString& id) override;
void OnReconnectionTimeSet(uint64_t 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_;
HeapTaskRunnerTimer<EventSource> connect_timer_;
uint64_t reconnect_delay_;
String event_stream_origin_;
uint64_t resource_identifier_ = 0;
// The world in which this EventSource was created. We need to store this
// because EventSource::Connect can be triggered by |connect_timer_|.
Member<const DOMWrapperWorld> world_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_EVENTSOURCE_EVENT_SOURCE_H_
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