зеркало из https://github.com/mozilla/gecko-dev.git
113 строки
2.9 KiB
C++
113 строки
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* This implementation has support only for http requests. It is because the
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* spec has defined event streams only for http. HTTP is required because
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* this implementation uses some http headers: "Last-Event-ID", "Cache-Control"
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* and "Accept".
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*/
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#ifndef mozilla_dom_EventSource_h
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#define mozilla_dom_EventSource_h
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#include "mozilla/Attributes.h"
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#include "mozilla/DOMEventTargetHelper.h"
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#include "nsIObserver.h"
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#include "nsIStreamListener.h"
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#include "nsIChannelEventSink.h"
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#include "nsIInterfaceRequestor.h"
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#include "nsITimer.h"
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#include "nsIHttpChannel.h"
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#include "nsDeque.h"
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class nsPIDOMWindowInner;
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namespace mozilla {
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class ErrorResult;
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namespace dom {
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struct EventSourceInit;
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class EventSourceImpl;
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class EventSource final : public DOMEventTargetHelper {
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friend class EventSourceImpl;
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public:
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(EventSource, DOMEventTargetHelper)
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virtual bool IsCertainlyAliveForCC() const override;
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// EventTarget
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void DisconnectFromOwner() override {
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DOMEventTargetHelper::DisconnectFromOwner();
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Close();
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}
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JSObject* WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) override;
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// WebIDL
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static already_AddRefed<EventSource> Constructor(
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const GlobalObject& aGlobal, const nsAString& aURL,
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const EventSourceInit& aEventSourceInitDict, ErrorResult& aRv);
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void GetUrl(nsAString& aURL) const {
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AssertIsOnTargetThread();
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aURL = mOriginalURL;
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}
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bool WithCredentials() const {
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AssertIsOnTargetThread();
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return mWithCredentials;
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}
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uint16_t ReadyState() const {
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AssertIsOnTargetThread();
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return mReadyState;
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}
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IMPL_EVENT_HANDLER(open)
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IMPL_EVENT_HANDLER(message)
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IMPL_EVENT_HANDLER(error)
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void Close();
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private:
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EventSource(nsPIDOMWindowInner* aOwnerWindow, bool aWithCredentials);
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virtual ~EventSource();
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// prevent bad usage
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EventSource(const EventSource& x) = delete;
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EventSource& operator=(const EventSource& x) = delete;
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void AssertIsOnTargetThread() const {
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MOZ_ASSERT(NS_IsMainThread() == mIsMainThread);
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}
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nsresult CreateAndDispatchSimpleEvent(const nsAString& aName);
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// Raw pointer because this EventSourceImpl is created, managed and destroyed
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// by EventSource.
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EventSourceImpl* mImpl;
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nsString mOriginalURL;
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uint16_t mReadyState;
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bool mWithCredentials;
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bool mIsMainThread;
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// This is used to keep EventSourceImpl instance when there is a connection.
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bool mKeepingAlive;
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void UpdateMustKeepAlive();
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void UpdateDontKeepAlive();
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_EventSource_h
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