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.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   *
53   */
54  public class WebDAVServlet extends HttpServlet {
55  
56      public void init(ServletConfig config) throws ServletException {
57          super.init(config);
58  
59          String storageClass = config.getInitParameter("storage-class");
60  
61          _storage = (WebDAVStorage)InstancePool.get(storageClass);
62      }
63  
64      public void service(HttpServletRequest req, HttpServletResponse res)
65          throws IOException, ServletException {
66  
67          PermissionCheckerImpl permissionChecker = null;
68  
69          try {
70  
71              // Set the path only if it hasn't already been set. This works if
72              // and only if the servlet is not mapped to more than one URL.
73  
74              if (_storage.getRootPath() == null) {
75                  _storage.setRootPath(getRootPath(req));
76              }
77  
78              // Permission checker
79  
80              String remoteUser = req.getRemoteUser();
81  
82              if (_log.isDebugEnabled()) {
83                  _log.debug("Remote user " + remoteUser);
84              }
85  
86              if (remoteUser != null) {
87                  PrincipalThreadLocal.setName(remoteUser);
88  
89                  long userId = GetterUtil.getLong(remoteUser);
90  
91                  User user = UserLocalServiceUtil.getUserById(userId);
92  
93                  permissionChecker = PermissionCheckerFactory.create(user, true);
94  
95                  PermissionThreadLocal.setPermissionChecker(permissionChecker);
96              }
97  
98              // Get the method instance
99  
100             Method method = MethodFactory.create(req);
101 
102             // Process the method
103 
104             WebDAVRequest webDavReq = new WebDAVRequest(
105                 _storage, req, res, permissionChecker);
106 
107             if (_log.isDebugEnabled()) {
108                 _log.debug("Path " + webDavReq.getPath());
109             }
110 
111             method.process(webDavReq);
112         }
113         catch (Exception e) {
114             _log.error(e, e);
115         }
116         finally {
117             try {
118                 PermissionCheckerFactory.recycle(permissionChecker);
119             }
120             catch (Exception e) {
121             }
122         }
123     }
124 
125     protected String getRootPath(HttpServletRequest req) {
126         StringMaker sm = new StringMaker();
127 
128         sm.append(WebDAVUtil.fixPath(req.getContextPath()));
129         sm.append(WebDAVUtil.fixPath(req.getServletPath()));
130 
131         String rootPath = sm.toString();
132 
133         if (_log.isDebugEnabled()) {
134             _log.debug("Root path " + rootPath);
135         }
136 
137         return rootPath;
138     }
139 
140     private static Log _log = LogFactory.getLog(WebDAVServlet.class);
141 
142     private WebDAVStorage _storage;
143 
144 }