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/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2003
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Darin Fisher <darin@netscape.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsIStreamListener.idl"

interface nsIFile;
interface nsIDownloadObserver;

/**
 * nsIDownloader
 *
 * A downloader is a special implementation of a nsIStreamListener that will
 * make the contents of the stream available as a file.  This may utilize the
 * disk cache as an optimization to avoid an extra copy of the data on disk.
 * The resulting file is valid from the time the downloader completes until
 * the last reference to the downloader is released.
 */
[scriptable, uuid(fafe41a9-a531-4d6d-89bc-588a6522fb4e)]
interface nsIDownloader : nsIStreamListener
{
    /**
     * Initialize this downloader
     *
     * @param observer
     *        the observer to be notified when the download completes.
     * @param downloadLocation
     *        the location where the stream contents should be written.
     *        if null, the downloader will select a location and the
     *        resulting file will be deleted (or otherwise made invalid)
     *        when the downloader object is destroyed.  if an explicit
     *        download location is specified then the resulting file will
     *        not be deleted, and it will be the callers responsibility
     *        to keep track of the file, etc.
     */
    void init(in nsIDownloadObserver observer,
              in nsIFile             downloadLocation);
};

[scriptable, uuid(44b3153e-a54e-4077-a527-b0325e40924e)]
interface nsIDownloadObserver : nsISupports
{
    /**
     * Called to signal a download that has completed.
     */
    void onDownloadComplete(in nsIDownloader downloader,
                            in nsIRequest    request,
                            in nsISupports   ctxt,
                            in nsresult      status,
                            in nsIFile       result);
};