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.sessionid;
24  
25  import com.liferay.portal.kernel.util.GetterUtil;
26  import com.liferay.util.SystemProperties;
27  
28  import java.io.IOException;
29  
30  import javax.servlet.Filter;
31  import javax.servlet.FilterChain;
32  import javax.servlet.FilterConfig;
33  import javax.servlet.ServletException;
34  import javax.servlet.ServletRequest;
35  import javax.servlet.ServletResponse;
36  import javax.servlet.http.HttpServletRequest;
37  import javax.servlet.http.HttpServletResponse;
38  
39  import org.apache.commons.logging.Log;
40  import org.apache.commons.logging.LogFactory;
41  
42  /**
43   * <a href="SessionIdFilter.java.html"><b><i>View Source</i></b></a>
44   *
45   * <p>
46   * http://forum.java.sun.com/thread.jspa?threadID=197150.
47   * </p>
48   *
49   * @author Brian Wing Shun Chan
50   *
51   */
52  public class SessionIdFilter implements Filter {
53  
54      public static final boolean USE_FILTER = GetterUtil.getBoolean(
55          SystemProperties.get(SessionIdFilter.class.getName()), true);
56  
57      public void init(FilterConfig config) throws ServletException {
58      }
59  
60      public void doFilter(
61              ServletRequest req, ServletResponse res, FilterChain chain)
62          throws IOException, ServletException {
63  
64          if (_log.isDebugEnabled()) {
65              if (USE_FILTER) {
66                  _log.debug(
67                      "Session id sharing between http and https is enabled");
68              }
69              else {
70                  _log.debug(
71                      "Session id sharing between http and https is disabled");
72              }
73          }
74  
75          if (USE_FILTER) {
76              HttpServletRequest httpReq = (HttpServletRequest)req;
77              HttpServletResponse httpRes = (HttpServletResponse)res;
78  
79              SessionIdServletRequest sessionIdReq =
80                  new SessionIdServletRequest(httpReq, httpRes);
81  
82              chain.doFilter(sessionIdReq, httpRes);
83          }
84          else {
85              chain.doFilter(req, res);
86          }
87      }
88  
89      public void destroy() {
90      }
91  
92      private static Log _log = LogFactory.getLog(SessionIdFilter.class);
93  
94  }