1   /**
2    * Copyright (c) 2000-2009 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.log.Log;
26  import com.liferay.portal.kernel.log.LogFactoryUtil;
27  import com.liferay.portal.kernel.util.GetterUtil;
28  import com.liferay.portal.kernel.util.InstancePool;
29  import com.liferay.portal.model.User;
30  import com.liferay.portal.security.auth.PrincipalThreadLocal;
31  import com.liferay.portal.security.permission.PermissionChecker;
32  import com.liferay.portal.security.permission.PermissionCheckerFactoryUtil;
33  import com.liferay.portal.security.permission.PermissionThreadLocal;
34  import com.liferay.portal.service.UserLocalServiceUtil;
35  import com.liferay.portal.util.PropsValues;
36  import com.liferay.portal.webdav.methods.Method;
37  import com.liferay.portal.webdav.methods.MethodFactory;
38  
39  import javax.servlet.http.HttpServlet;
40  import javax.servlet.http.HttpServletRequest;
41  import javax.servlet.http.HttpServletResponse;
42  
43  /**
44   * <a href="WebDAVServlet.java.html"><b><i>View Source</i></b></a>
45   *
46   * @author Brian Wing Shun Chan
47   * @author Alexander Chow
48   *
49   */
50  public class WebDAVServlet extends HttpServlet {
51  
52      public void service(
53          HttpServletRequest request, HttpServletResponse response) {
54  
55          int status = HttpServletResponse.SC_PRECONDITION_FAILED;
56  
57          try {
58              if (isIgnoredResource(request)) {
59                  status = HttpServletResponse.SC_NOT_FOUND;
60  
61                  return;
62              }
63  
64              WebDAVStorage storage = getStorage(request);
65  
66              // Set the path only if it has not already been set. This works
67              // if and only if the servlet is not mapped to more than one URL.
68  
69              if (storage.getRootPath() == null) {
70                  storage.setRootPath(getRootPath(request));
71              }
72  
73              // Permission checker
74  
75              PermissionChecker permissionChecker = null;
76  
77              String remoteUser = request.getRemoteUser();
78  
79              if (remoteUser != null) {
80                  PrincipalThreadLocal.setName(remoteUser);
81  
82                  long userId = GetterUtil.getLong(remoteUser);
83  
84                  User user = UserLocalServiceUtil.getUserById(userId);
85  
86                  permissionChecker = PermissionCheckerFactoryUtil.create(
87                      user, true);
88  
89                  PermissionThreadLocal.setPermissionChecker(permissionChecker);
90              }
91  
92              // Get the method instance
93  
94              Method method = MethodFactory.create(request);
95  
96              // Process the method
97  
98              WebDAVRequest webDavRequest = new WebDAVRequestImpl(
99                  storage, request, response, permissionChecker);
100 
101             if (_log.isInfoEnabled()) {
102                 _log.info("Request URI " + request.getRequestURI());
103                 _log.info("Method " + request.getMethod());
104                 _log.info("User agent " + request.getHeader("User-agent"));
105             }
106 
107             status = method.process(webDavRequest);
108         }
109         catch (Exception e) {
110             _log.error(e, e);
111         }
112         finally {
113             if (status > 0) {
114                 response.setStatus(status);
115 
116                 if (_log.isInfoEnabled()) {
117                     _log.info("Status code " + status);
118                 }
119             }
120         }
121     }
122 
123     protected String getRootPath(HttpServletRequest request) {
124         StringBuilder sb = new StringBuilder();
125 
126         sb.append(WebDAVUtil.fixPath(request.getContextPath()));
127         sb.append(WebDAVUtil.fixPath(request.getServletPath()));
128 
129         return sb.toString();
130     }
131 
132     protected WebDAVStorage getStorage(HttpServletRequest request)
133         throws WebDAVException {
134 
135         String[] pathArray = WebDAVUtil.getPathArray(
136             request.getPathInfo(), true);
137 
138         WebDAVStorage storage = null;
139 
140         if (pathArray.length == 1) {
141             storage = (WebDAVStorage)InstancePool.get(
142                 CompanyWebDAVStorageImpl.class.getName());
143         }
144         else if (pathArray.length == 2) {
145             storage = (WebDAVStorage)InstancePool.get(
146                 GroupWebDAVStorageImpl.class.getName());
147         }
148         else if (pathArray.length >= 3) {
149             storage = WebDAVUtil.getStorage(pathArray[2]);
150         }
151 
152         if (storage == null) {
153             throw new WebDAVException(
154                 "Invalid WebDAV path " + request.getPathInfo());
155         }
156 
157         return storage;
158     }
159 
160     protected boolean isIgnoredResource(HttpServletRequest request) {
161         String[] pathArray = WebDAVUtil.getPathArray(
162             request.getPathInfo(), true);
163 
164         if ((pathArray == null) || (pathArray.length <= 0)) {
165             return false;
166         }
167 
168         String resourceName = pathArray[pathArray.length - 1];
169 
170         for (String ignore : PropsValues.WEBDAV_IGNORE) {
171             if (ignore.equals(resourceName)) {
172                 if (_log.isDebugEnabled()) {
173                     _log.debug(
174                         "Skipping over " + request.getMethod() + " " +
175                             request.getPathInfo());
176                 }
177 
178                 return true;
179             }
180         }
181 
182         return false;
183     }
184 
185     private static Log _log = LogFactoryUtil.getLog(WebDAVServlet.class);
186 
187 }