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Java > Open Source Codes > org > jresearch > gossip > filters > BanFilter


1 /*
2  * $Id: BanFilter.java,v 1.3 2005/06/07 12:32:26 bel70 Exp $
3  *
4  * ***** BEGIN LICENSE BLOCK *****
5  * The contents of this file are subject to the Mozilla Public License
6  * Version 1.1 (the "License"); you may not use this file except in
7  * compliance with the License. You may obtain a copy of the License
8  * at http://www.mozilla.org/MPL/
9  *
10  * Software distributed under the License is distributed on an "AS IS"
11  * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
12  * the License for the specific language governing rights and
13  * limitations under the License.
14  *
15  * The Original Code is JGossip forum code.
16  *
17  * The Initial Developer of the Original Code is the JResearch, Org.
18  * Portions created by the Initial Developer are Copyright (C) 2004
19  * the Initial Developer. All Rights Reserved.
20  *
21  * Contributor(s):
22  * Dmitriy Belov <bel@jresearch.org>
23  * .
24  * * ***** END LICENSE BLOCK ***** */
25 /*
26  * Created on 29.08.2004
27  *
28  */
29 package org.jresearch.gossip.filters;
30
31 import java.io.IOException JavaDoc;
32
33 import javax.servlet.Filter JavaDoc;
34 import javax.servlet.FilterChain JavaDoc;
35 import javax.servlet.FilterConfig JavaDoc;
36 import javax.servlet.ServletException JavaDoc;
37 import javax.servlet.ServletRequest JavaDoc;
38 import javax.servlet.ServletResponse JavaDoc;
39 import javax.servlet.http.HttpServletRequest JavaDoc;
40 import javax.servlet.http.HttpSession JavaDoc;
41
42 import org.jresearch.gossip.IConst;
43 import org.jresearch.gossip.am.ban.BanGuard;
44 import org.jresearch.gossip.beans.user.User;
45 import org.jresearch.gossip.constants.BanType;
46 import org.jresearch.gossip.exception.SystemException;
47 import org.jresearch.gossip.log.LogLevel;
48 import org.jresearch.gossip.log.avalon.JGossipLog;
49
50 /**
51  * @author Dmitry Belov
52  *
53  */
54 public class BanFilter implements Filter JavaDoc {
55
56     private FilterConfig JavaDoc _config;
57
58     private String JavaDoc _denied;
59
60     private String JavaDoc _signon;
61
62     private String JavaDoc _suri;
63
64     /*
65      * (non-Javadoc)
66      *
67      * @see javax.servlet.Filter#init(javax.servlet.FilterConfig)
68      */
69     public void init(FilterConfig JavaDoc config) throws ServletException JavaDoc {
70         _config = config;
71         _denied = config.getInitParameter("denied.action");
72         _signon = config.getInitParameter("signon.action");
73
74         int i = _signon.lastIndexOf("/");
75         _suri = _signon;
76         if (i >= 0) {
77             _suri = _suri.substring(i);
78         }
79     }
80
81     /*
82      * (non-Javadoc)
83      *
84      * @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest,
85      * javax.servlet.ServletResponse, javax.servlet.FilterChain)
86      */
87     public void doFilter(ServletRequest JavaDoc request, ServletResponse JavaDoc response,
88             FilterChain JavaDoc chain) throws IOException JavaDoc, ServletException JavaDoc {
89         HttpServletRequest JavaDoc req = (HttpServletRequest JavaDoc) request;
90         HttpSession JavaDoc session = req.getSession();
91         User user = (User) session.getAttribute(IConst.SESSION.USER_KEY);
92         try {
93             BanGuard guard = BanGuard.getInstance();
94             String JavaDoc forward = "";
95             if (guard.checkBan(req.getRemoteAddr(), BanType.IP)) {
96                 forward = _denied;
97             } else if (guard.checkBan(user.getName(), BanType.LOGIN)) {
98                 String JavaDoc uri = req.getRequestURI();
99                 int i = uri.lastIndexOf("/");
100                 if (i >= 0) {
101                     uri = uri.substring(i);
102                 }
103
104                 if (_suri.equals(uri)) {
105                     forward = _signon;
106                 } else {
107                     forward = _denied;
108                 }
109
110             }
111             if (!forward.equals("")) {
112                 JGossipLog.audit(LogLevel.WARN, (User) session
113                         .getAttribute(IConst.SESSION.USER_KEY),
114                         " access denied according ban rules "
115                                 + req.getRequestURI(), session);
116                 _config.getServletContext().getRequestDispatcher(forward)
117                         .forward(request, response);
118             }
119         } catch (SystemException e) {
120             throw new ServletException JavaDoc(e);
121         }
122         chain.doFilter(request, response);
123
124     }
125
126     /*
127      * (non-Javadoc)
128      *
129      * @see javax.servlet.Filter#destroy()
130      */
131     public void destroy() {
132     }
133
134 }
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