/* * Created on May 14, 2007 * Created by Paul Gardner * Copyright (C) 2007 Aelitis, All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * AELITIS, SAS au capital de 63.529,40 euros * 8 Allee Lenotre, La Grille Royale, 78600 Le Mesnil le Roi, France. * */ package com.aelitis.azureus.util; import org.gudy.azureus2.plugins.download.Download; import org.gudy.azureus2.plugins.torrent.TorrentAttribute; import org.gudy.azureus2.plugins.torrent.TorrentManager; import org.gudy.azureus2.pluginsimpl.local.PluginInitializer; public class DownloadUtils { private static TorrentAttribute ta_tracker_extensions; public static synchronized void initialise() { if ( ta_tracker_extensions == null ){ TorrentManager tm = PluginInitializer.getDefaultInterface().getTorrentManager(); ta_tracker_extensions = tm.getAttribute( TorrentAttribute.TA_TRACKER_CLIENT_EXTENSIONS ); } } public static synchronized void addTrackerExtension( Download download, String extension_prefix, String extension_value ) { String extension = "&" + extension_prefix + "=" + extension_value; String value = download.getAttribute( ta_tracker_extensions ); if ( value != null ){ // if already exists then bail if ( value.indexOf( extension ) != -1 ){ return; } // if prefix exists then remove existing value if ( value.indexOf( extension_prefix ) != -1 ){ String[] bits = value.split("&"); value = ""; for ( int i=0; i<bits.length; i++ ){ String bit = bits[i].trim(); if ( bit.length() == 0 ){ continue; } if ( !bit.startsWith( extension_prefix+"=" )){ value += "&" + bit; } } } value += extension; }else{ value = extension; } download.setAttribute( ta_tracker_extensions, value ); } public static synchronized String getTrackerExtensions( Download download ) { return( download.getAttribute( ta_tracker_extensions )); } public static synchronized void removeTrackerExtension( Download download, String extension_prefix ) { String value = download.getAttribute( ta_tracker_extensions ); if ( value != null ){ int pos = value.indexOf( extension_prefix ); if ( pos == -1 ){ return; } String[] bits = value.split("&"); value = ""; for ( int i=0; i<bits.length; i++ ){ String bit = bits[i].trim(); if ( bit.length() == 0 ){ continue; } if ( !bit.startsWith(extension_prefix+"=")){ value += "&" + bit; } } if ( value.length() == 0 ){ value = null; } download.setAttribute( ta_tracker_extensions, value ); } } }