1   /**
2    * Copyright (c) 2000-2007 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.servlet.filters.sso.cas;
24  
25  import com.liferay.portal.kernel.util.Validator;
26  import com.liferay.portal.util.PortalUtil;
27  import com.liferay.portal.util.PrefsPropsUtil;
28  import com.liferay.portal.util.PropsUtil;
29  import com.liferay.util.CollectionFactory;
30  import com.liferay.util.servlet.filters.DynamicFilterConfig;
31  
32  import java.io.IOException;
33  
34  import java.util.Map;
35  
36  import javax.servlet.Filter;
37  import javax.servlet.FilterChain;
38  import javax.servlet.FilterConfig;
39  import javax.servlet.ServletContext;
40  import javax.servlet.ServletException;
41  import javax.servlet.ServletRequest;
42  import javax.servlet.ServletResponse;
43  import javax.servlet.http.HttpServletRequest;
44  import javax.servlet.http.HttpServletResponse;
45  import javax.servlet.http.HttpSession;
46  
47  import org.apache.commons.logging.Log;
48  import org.apache.commons.logging.LogFactory;
49  
50  /**
51   * <a href="CASFilter.java.html"><b><i>View Source</i></b></a>
52   *
53   * @author Michael Young
54   * @author Brian Wing Shun Chan
55   *
56   */
57  public class CASFilter implements Filter {
58  
59      public static void reload(long companyId) {
60          _casFilters.remove(new Long(companyId));
61      }
62  
63      public void init(FilterConfig config) throws ServletException {
64      }
65  
66      public void doFilter(
67              ServletRequest req, ServletResponse res, FilterChain chain)
68          throws IOException, ServletException {
69  
70          try {
71              HttpServletRequest httpReq = (HttpServletRequest)req;
72  
73              long companyId = PortalUtil.getCompanyId(httpReq);
74  
75              if (PrefsPropsUtil.getBoolean(
76                      companyId, PropsUtil.CAS_AUTH_ENABLED)) {
77  
78                  String pathInfo = httpReq.getPathInfo();
79  
80                  if (pathInfo.indexOf("/portal/logout") != -1) {
81                      HttpServletResponse httpRes = (HttpServletResponse)res;
82                      HttpSession httpSes = httpReq.getSession();
83  
84                      httpSes.invalidate();
85  
86                      String logoutUrl = PrefsPropsUtil.getString(
87                          companyId, PropsUtil.CAS_LOGOUT_URL);
88  
89                      httpRes.sendRedirect(logoutUrl);
90                  }
91                  else {
92                      Filter casFilter = getCASFilter(companyId);
93  
94                      casFilter.doFilter(req, res, chain);
95                  }
96              }
97              else {
98                  chain.doFilter(req, res);
99              }
100         }
101         catch (Exception e) {
102             _log.error(e, e);
103         }
104     }
105 
106     public void destroy() {
107     }
108 
109     protected Filter getCASFilter(long companyId) throws Exception {
110         Long companyIdObj = new Long(companyId);
111 
112         edu.yale.its.tp.cas.client.filter.CASFilter casFilter =
113             (edu.yale.its.tp.cas.client.filter.CASFilter)_casFilters.get(
114                 companyIdObj);
115 
116         if (casFilter == null) {
117             casFilter = new edu.yale.its.tp.cas.client.filter.CASFilter();
118 
119             DynamicFilterConfig config = new DynamicFilterConfig(
120                 _filterName, _ctx);
121 
122             String serverName = PrefsPropsUtil.getString(
123                 companyId, PropsUtil.CAS_SERVER_NAME);
124             String serviceUrl = PrefsPropsUtil.getString(
125                 companyId, PropsUtil.CAS_SERVICE_URL);
126 
127             config.addInitParameter(
128                 edu.yale.its.tp.cas.client.filter.CASFilter.LOGIN_INIT_PARAM,
129                 PrefsPropsUtil.getString(companyId, PropsUtil.CAS_LOGIN_URL));
130 
131             if (Validator.isNotNull(serviceUrl)) {
132                 config.addInitParameter(
133                     edu.yale.its.tp.cas.client.filter.CASFilter.
134                         SERVICE_INIT_PARAM,
135                     serviceUrl);
136             }
137             else {
138                 config.addInitParameter(
139                     edu.yale.its.tp.cas.client.filter.CASFilter.
140                         SERVERNAME_INIT_PARAM,
141                     serverName);
142             }
143 
144             config.addInitParameter(
145                 edu.yale.its.tp.cas.client.filter.CASFilter.VALIDATE_INIT_PARAM,
146                 PrefsPropsUtil.getString(
147                     companyId, PropsUtil.CAS_VALIDATE_URL));
148 
149             casFilter.init(config);
150 
151             _casFilters.put(companyIdObj, casFilter);
152         }
153 
154         return casFilter;
155     }
156 
157     private static Log _log = LogFactory.getLog(CASFilter.class);
158 
159     private static Map _casFilters = CollectionFactory.getSyncHashMap();
160 
161     private String _filterName;
162     private ServletContext _ctx;
163 
164 }