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/* 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 nsIHttpChannel;

/**
 * nsIHttpPushListener
 *
 * Used for triggering when a HTTP/2 push is received.
 *
 */
[scriptable, uuid(0d6ce59c-ad5d-4520-b4d3-09664868f279)]
interface nsIHttpPushListener : nsISupports
{
  /**
   * When provided as a notificationCallback to an httpChannel, this.onPush()
   * will be invoked when there is a >= Http2 push to that
   * channel. The push may be in progress.
   *
   * The consumer must start the new channel in the usual way by calling
   * pushChannel.AsyncOpen with a nsIStreamListener object that
   * will receive the normal sequence of OnStartRequest(),
   * 0 to N OnDataAvailable(), and onStopRequest().
   *
   * The new channel can be canceled after the AsyncOpen if it is not wanted.
   *
   * @param associatedChannel
   *        the monitor channel that was recieved on
   * @param pushChannel
   *        a channel to the resource which is being pushed
   */
  void onPush(in nsIHttpChannel associatedChannel,
              in nsIHttpChannel pushChannel);
};