1   /**
2    * Copyright (c) 2000-2008 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.webdav;
24  
25  import com.liferay.portal.kernel.util.GetterUtil;
26  import com.liferay.portal.kernel.util.InstancePool;
27  import com.liferay.portal.kernel.util.StringMaker;
28  import com.liferay.portal.model.User;
29  import com.liferay.portal.security.auth.PrincipalThreadLocal;
30  import com.liferay.portal.security.permission.PermissionCheckerFactory;
31  import com.liferay.portal.security.permission.PermissionCheckerImpl;
32  import com.liferay.portal.security.permission.PermissionThreadLocal;
33  import com.liferay.portal.service.UserLocalServiceUtil;
34  import com.liferay.portal.webdav.methods.Method;
35  import com.liferay.portal.webdav.methods.MethodFactory;
36  
37  import java.io.IOException;
38  
39  import javax.servlet.ServletConfig;
40  import javax.servlet.ServletException;
41  import javax.servlet.http.HttpServlet;
42  import javax.servlet.http.HttpServletRequest;
43  import javax.servlet.http.HttpServletResponse;
44  
45  import org.apache.commons.logging.Log;
46  import org.apache.commons.logging.LogFactory;
47  
48  /**
49   * <a href="WebDAVServlet.java.html"><b><i>View Source</i></b></a>
50   *
51   * @author Brian Wing Shun Chan
52   * @author Alexander Chow
53   *
54   */
55  public class WebDAVServlet extends HttpServlet {
56  
57      public void init(ServletConfig config) throws ServletException {
58          super.init(config);
59  
60          String storageClass = config.getInitParameter("storage-class");
61  
62          _storage = (WebDAVStorage)InstancePool.get(storageClass);
63      }
64  
65      public void service(HttpServletRequest req, HttpServletResponse res)
66          throws IOException, ServletException {
67  
68          PermissionCheckerImpl permissionChecker = null;
69  
70          int status = HttpServletResponse.SC_NOT_IMPLEMENTED;
71  
72          try {
73  
74              // Set the path only if it hasn't already been set. This works if
75              // and only if the servlet is not mapped to more than one URL.
76  
77              if (_storage.getRootPath() == null) {
78                  _storage.setRootPath(getRootPath(req));
79              }
80  
81              // Permission checker
82  
83              String remoteUser = req.getRemoteUser();
84  
85              if (remoteUser != null) {
86                  PrincipalThreadLocal.setName(remoteUser);
87  
88                  long userId = GetterUtil.getLong(remoteUser);
89  
90                  User user = UserLocalServiceUtil.getUserById(userId);
91  
92                  permissionChecker = PermissionCheckerFactory.create(user, true);
93  
94                  PermissionThreadLocal.setPermissionChecker(permissionChecker);
95              }
96  
97              // Get the method instance
98  
99              Method method = MethodFactory.create(req);
100 
101             // Process the method
102 
103             WebDAVRequest webDavReq = new WebDAVRequest(
104                 _storage, req, res, permissionChecker);
105 
106             if (_log.isInfoEnabled()) {
107                 _log.info(
108                     "Remote user " + remoteUser + " " + req.getMethod() + " " +
109                         req.getRequestURI());
110             }
111 
112             status = method.process(webDavReq);
113         }
114         catch (Exception e) {
115             _log.error(e, e);
116         }
117         finally {
118             if (status > 0) {
119                 res.setStatus(status);
120 
121                 if (_log.isInfoEnabled()) {
122                     _log.info("Returning status code " + status);
123                 }
124             }
125 
126             try {
127                 PermissionCheckerFactory.recycle(permissionChecker);
128             }
129             catch (Exception e) {
130             }
131         }
132     }
133 
134     protected String getRootPath(HttpServletRequest req) {
135         StringMaker sm = new StringMaker();
136 
137         sm.append(WebDAVUtil.fixPath(req.getContextPath()));
138         sm.append(WebDAVUtil.fixPath(req.getServletPath()));
139 
140         String rootPath = sm.toString();
141 
142         if (_log.isDebugEnabled()) {
143             _log.debug("Root path " + rootPath);
144         }
145 
146         return rootPath;
147     }
148 
149     private static Log _log = LogFactory.getLog(WebDAVServlet.class);
150 
151     private WebDAVStorage _storage;
152 
153 }