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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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 nsIHttpChannel;
interface nsIURI;

/**
 * nsIHttpEventSink
 *
 * Implement this interface to receive control over various HTTP events.  The
 * HTTP channel will try to get this interface from its notificationCallbacks
 * attribute, and if it doesn't find it there it will look for it from its
 * loadGroup's notificationCallbacks attribute.
 *
 * These methods are called before onStartRequest, and should be handled
 * SYNCHRONOUSLY.
 *
 * @deprecated Newly written code should use nsIChannelEventSink instead of this
 * interface.
 */
[scriptable, uuid(9475a6af-6352-4251-90f9-d65b1cd2ea15)]
interface nsIHttpEventSink : nsISupports
{
    /**
     * Called when a redirect occurs due to a HTTP response like 302.  The
     * redirection may be to a non-http channel.
     *
     * @return failure cancels redirect
     */
    void onRedirect(in nsIHttpChannel httpChannel,
                    in nsIChannel newChannel);
};