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1: /* 2: * GopherContentHandler.java 3: * Copyright (C) 2003 The Free Software Foundation 4: * 5: * This file is part of GNU inetlib, a library. 6: * 7: * GNU inetlib is free software; you can redistribute it and/or modify 8: * it under the terms of the GNU General Public License as published by 9: * the Free Software Foundation; either version 2 of the License, or 10: * (at your option) any later version. 11: * 12: * GNU inetlib is distributed in the hope that it will be useful, 13: * but WITHOUT ANY WARRANTY; without even the implied warranty of 14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15: * GNU General Public License for more details. 16: * 17: * You should have received a copy of the GNU General Public License 18: * along with this library; if not, write to the Free Software 19: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20: * 21: * Linking this library statically or dynamically with other modules is 22: * making a combined work based on this library. Thus, the terms and 23: * conditions of the GNU General Public License cover the whole 24: * combination. 25: * 26: * As a special exception, the copyright holders of this library give you 27: * permission to link this library with independent modules to produce an 28: * executable, regardless of the license terms of these independent 29: * modules, and to copy and distribute the resulting executable under 30: * terms of your choice, provided that you also meet, for each linked 31: * independent module, the terms and conditions of the license of that 32: * module. An independent module is a module which is not derived from 33: * or based on this library. If you modify this library, you may extend 34: * this exception to your version of the library, but you are not 35: * obliged to do so. If you do not wish to do so, delete this 36: * exception statement from your version. 37: */ 38: 39: package gnu.inet.gopher; 40: 41: import java.io.IOException; 42: import java.net.ContentHandler; 43: import java.net.UnknownServiceException; 44: import java.net.URL; 45: import java.net.URLConnection; 46: 47: /** 48: * A Gopher content handler. 49: * This will return either directory listings or input streams. 50: * 51: * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> 52: */ 53: public class GopherContentHandler 54: extends ContentHandler 55: { 56: 57: public Object getContent(URLConnection urlc) 58: throws IOException 59: { 60: if (urlc instanceof GopherURLConnection) 61: { 62: GopherURLConnection gurlc = (GopherURLConnection) urlc; 63: GopherConnection connection = gurlc.connection; 64: URL url = gurlc.getURL(); 65: String dir = url.getPath(); 66: String file = url.getFile(); 67: if (dir == null && file == null) 68: { 69: return connection.list(); 70: } 71: else 72: { 73: return gurlc.getInputStream(); 74: } 75: } 76: else 77: { 78: throw new UnknownServiceException(); 79: } 80: } 81: 82: }