зеркало из https://github.com/mozilla/gecko-dev.git
60 строки
2.6 KiB
C++
60 строки
2.6 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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#ifndef _adivertablechannelparent_h_
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#define _adivertablechannelparent_h_
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#include "nsISupports.h"
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class nsIStreamListener;
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namespace mozilla {
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namespace net {
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// To be implemented by a channel's parent actors, e.g. HttpChannelParent
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// and FTPChannelParent. Used by ChannelDiverterParent to divert
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// nsIStreamListener callbacks from the child process to a new
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// listener in the parent process.
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class ADivertableParentChannel : public nsISupports {
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public:
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// Called by ChannelDiverterParent::DivertTo(nsIStreamListener*).
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// The listener should now be used to received nsIStreamListener callbacks,
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// i.e. OnStartRequest, OnDataAvailable and OnStopRequest, as if it had been
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// passed to AsyncOpen for the channel. A reference to the listener will be
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// added and kept until OnStopRequest has completed.
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virtual void DivertTo(nsIStreamListener* aListener) = 0;
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// Called to suspend parent channel in ChannelDiverterParent constructor.
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virtual nsresult SuspendForDiversion() = 0;
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// While messages are diverted back from the child to the parent calls to
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// suspend/resume the channel must also suspend/resume the message diversion.
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// These two functions will be called by nsHttpChannel and nsFtpChannel
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// Suspend()/Resume() functions.
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virtual nsresult SuspendMessageDiversion() = 0;
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virtual nsresult ResumeMessageDiversion() = 0;
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// Cancel an ongoing diversion by using IPC to invoke Cancel() in the child.
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// This is necessary because most of the channel's state machine is suspended
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// during diversion, so an explicit action must be taken to interrupt the
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// diversion process so cancellation can be fully processed.
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//
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// Historically, diversions were assumed to be shortlived, where it was merely
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// a question of diverting some small amount of network traffic back to the
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// parent. However, Service Worker child interception made it possible for
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// the data to entirely be sourced from the child, which makes diversion
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// potentially long-lived. Especially when large files are involved.
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//
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// This mechanism is expected to be removed when ServiceWorkers move from
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// child intercept to parent intercept (in the short to medium term).
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virtual nsresult CancelDiversion() = 0;
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};
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} // namespace net
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} // namespace mozilla
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#endif
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