1 /*
2 * $Source$
3 * $Revision$
4 *
5 * Copyright (C) 2000 William Chesters
6 *
7 * Part of Melati (http://melati.org), a framework for the rapid
8 * development of clean, maintainable web applications.
9 *
10 * Melati is free software; Permission is granted to copy, distribute
11 * and/or modify this software under the terms either:
12 *
13 * a) the GNU General Public License as published by the Free Software
14 * Foundation; either version 2 of the License, or (at your option)
15 * any later version,
16 *
17 * or
18 *
19 * b) any version of the Melati Software License, as published
20 * at http://melati.org
21 *
22 * You should have received a copy of the GNU General Public License and
23 * the Melati Software License along with this program;
24 * if not, write to the Free Software Foundation, Inc.,
25 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the
26 * GNU General Public License and visit http://melati.org to obtain the
27 * Melati Software License.
28 *
29 * Feel free to contact the Developers of Melati (http://melati.org),
30 * if you would like to work out a different arrangement than the options
31 * outlined here. It is our intention to allow Melati to be used by as
32 * wide an audience as possible.
33 *
34 * This program is distributed in the hope that it will be useful,
35 * but WITHOUT ANY WARRANTY; without even the implied warranty of
36 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
37 * GNU General Public License for more details.
38 *
39 * Contact details for copyright holder:
40 *
41 * William Chesters <williamc@paneris.org>
42 * http://paneris.org/~williamc
43 * Obrechtstraat 114, 2517VX Den Haag, The Netherlands
44 */
45
46 package org.melati.login;
47
48 import javax.servlet.http.HttpSession;
49
50 import org.melati.Melati;
51 import org.melati.template.ServletTemplateContext;
52 import org.melati.servlet.Form;
53 import org.melati.servlet.TemplateServlet;
54
55 /**
56 * A servlet which deletes login session cookies to
57 * log a user off from the system.
58 *
59 */
60 public class Logout extends TemplateServlet {
61
62 /**
63 *
64 */
65 private static final long serialVersionUID = -2687805550356671524L;
66
67 protected String logoutTemplate(String name) {
68 return "org/melati/login/" + name;
69 }
70
71 protected String logoutSuccessTemplate() {
72 return logoutTemplate("Logout");
73 }
74
75 protected String doTemplateRequest(Melati melati, ServletTemplateContext context)
76 throws Exception {
77 HttpSession session = melati.getSession();
78 String returnURL = Form.getFieldNulled(context,"continuationURL");
79 if (returnURL == null) {
80 context.put("continuationURL", melati.getZoneURL() + "/");
81 } else {
82 context.put("continuationURL", returnURL);
83 }
84 session.removeAttribute(HttpSessionAccessHandler.USER);
85
86 return logoutSuccessTemplate();
87 }
88
89 }