/* 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/. */
#include "nsISupports.idl"
interface nsIChannel;
interface nsIParentChannel;
/**
* Used on the chrome process as a service to join channel implementation
* and parent IPC protocol side under a unique id . Provides this way a generic
* communication while redirecting to various protocols .
*
* See also nsIChildChannel and nsIParentChannel .
*/
[scriptable, uuid (
1 f2c5e0a-
9 b3d-
4 d8e-
8 c4a-
6 d7e0b1a2c3d)]
interface nsIRedirectChannelRegistrar : nsISupports
{
/**
* Register the redirect target channel . The passed id needs to be a
* unique ID for that channel ( see ` nsContentUtils : : GenerateLoadIdentifier ` ) .
* aContentParentId identifies the content process the redirect is destined
* for ( 0 for the parent process ) ; linkChannels will only pair the channel
* with a parent actor coming from that same process .
*
* Primarily used in ParentChannelListener : : AsyncOnChannelRedirect to get
* a channel id sent to the HttpChannelChild being redirected .
*/
void registerChannel(in nsIChannel channel, in uint64_t id,
in uint64_t aContentParentId);
/**
* First , search for the channel registered under the id . If found , and the
* registered channel is owned by aContentParentId , return it . Then , register
* under the same id the parent side of IPC protocol to let it be later
* grabbed back by the originator of the redirect and notifications from the
* real channel could be forwarded to this parent channel . Fails with
* NS_ERROR_NOT_AVAILABLE if no channel is registered under the id for the
* given content process .
*
* Primarily used in parent side of an IPC protocol implementation
* in reaction to nsIChildChannel . connectParent ( id ) called from the child
* process . aContentParentId is the process that made that request .
*/
nsIChannel linkChannels(in uint64_t id, in uint64_t aContentParentId,
in nsIParentChannel channel);
/**
* Returns back the channel previously registered under the ID with
* registerChannel method .
*
* Primarilly used in chrome IPC side of protocols when attaching a redirect
* target channel to an existing ' real ' channel implementation .
*/
nsIChannel getRegisteredChannel(in uint64_t id);
/**
* Returns the stream listener that shall be attached to the redirect target
* channel , all notification from the redirect target channel will be
* forwarded to this stream listener .
*
* Primarilly used in HttpChannelParent : : OnRedirectResult callback to grab
* the created parent side of the channel and forward notifications to it .
*/
nsIParentChannel getParentChannel(in uint64_t id);
/**
* To not force all channel implementations to support weak reference
* consumers of this service must ensure release of registered channels them
* self . This releases both the real and parent channel registered under
* the id .
*
* Primarilly used in HttpChannelParent : : OnRedirectResult callback .
*/
void deregisterChannels(in uint64_t id);
};
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