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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* This implementation has support only for http requests. It is because the
* spec has defined event streams only for http. HTTP is required because
* this implementation uses some http headers: "Last-Event-ID", "Cache-Control"
* and "Accept".
*/
#ifndef mozilla_dom_EventSource_h
#define mozilla_dom_EventSource_h
#include "mozilla/Attributes.h"
#include "mozilla/DOMEventTargetHelper.h"
#include "nsIObserver.h"
#include "nsIStreamListener.h"
#include "nsIChannelEventSink.h"
#include "nsIInterfaceRequestor.h"
#include "nsITimer.h"
#include "nsIHttpChannel.h"
#include "nsWeakReference.h"
#include "nsDeque.h"
#include "nsIUnicodeDecoder.h"
class nsPIDOMWindowInner;
namespace mozilla {
class ErrorResult;
namespace dom {
struct EventSourceInit;
class EventSourceImpl;
class EventSource final : public DOMEventTargetHelper
{
friend class EventSourceImpl;
public:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(EventSource, DOMEventTargetHelper)
virtual bool IsCertainlyAliveForCC() const override;
// EventTarget
void DisconnectFromOwner() override
{
DOMEventTargetHelper::DisconnectFromOwner();
Close();
}
JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
// WebIDL
static already_AddRefed<EventSource>
Constructor(const GlobalObject& aGlobal, const nsAString& aURL,
const EventSourceInit& aEventSourceInitDict, ErrorResult& aRv);
void GetUrl(nsAString& aURL) const
{
AssertIsOnTargetThread();
aURL = mOriginalURL;
}
bool WithCredentials() const
{
AssertIsOnTargetThread();
return mWithCredentials;
}
uint16_t ReadyState() const
{
AssertIsOnTargetThread();
return mReadyState;
}
IMPL_EVENT_HANDLER(open)
IMPL_EVENT_HANDLER(message)
IMPL_EVENT_HANDLER(error)
void Close();
private:
EventSource(nsPIDOMWindowInner* aOwnerWindow, bool aWithCredentials);
virtual ~EventSource();
// prevent bad usage
EventSource(const EventSource& x) = delete;
EventSource& operator=(const EventSource& x) = delete;
void AssertIsOnTargetThread() const
{
MOZ_ASSERT(NS_IsMainThread() == mIsMainThread);
}
nsresult CreateAndDispatchSimpleEvent(const nsAString& aName);
// Raw pointer because this EventSourceImpl is created, managed and destroyed
// by EventSource.
EventSourceImpl* mImpl;
nsString mOriginalURL;
uint16_t mReadyState;
bool mWithCredentials;
bool mIsMainThread;
// This is used to keep EventSourceImpl instance when there is a connection.
bool mKeepingAlive;
void UpdateMustKeepAlive();
void UpdateDontKeepAlive();
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_EventSource_h
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