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.kernel.util.Validator;
30  import com.liferay.portal.model.User;
31  import com.liferay.portal.security.auth.PrincipalThreadLocal;
32  import com.liferay.portal.security.permission.PermissionChecker;
33  import com.liferay.portal.security.permission.PermissionCheckerFactory;
34  import com.liferay.portal.security.permission.PermissionThreadLocal;
35  import com.liferay.portal.service.UserLocalServiceUtil;
36  import com.liferay.portal.util.PropsValues;
37  import com.liferay.portal.webdav.methods.Method;
38  import com.liferay.portal.webdav.methods.MethodFactory;
39  
40  import javax.servlet.http.HttpServlet;
41  import javax.servlet.http.HttpServletRequest;
42  import javax.servlet.http.HttpServletResponse;
43  
44  /**
45   * <a href="WebDAVServlet.java.html"><b><i>View Source</i></b></a>
46   *
47   * @author Brian Wing Shun Chan
48   * @author Alexander Chow
49   *
50   */
51  public class WebDAVServlet extends HttpServlet {
52  
53      public void service(
54          HttpServletRequest request, HttpServletResponse response) {
55  
56          PermissionChecker permissionChecker = null;
57  
58          int status = HttpServletResponse.SC_PRECONDITION_FAILED;
59  
60          try {
61              if (isIgnoredResource(request)) {
62                  status = HttpServletResponse.SC_NOT_FOUND;
63  
64                  return;
65              }
66  
67              WebDAVStorage storage = getStorage(request);
68  
69              // Set the path only if it has not already been set. This works
70              // if and only if the servlet is not mapped to more than one URL.
71  
72              if (storage.getRootPath() == null) {
73                  storage.setRootPath(getRootPath(request));
74              }
75  
76              // Permission checker
77  
78              String remoteUser = request.getRemoteUser();
79  
80              if (remoteUser != null) {
81                  PrincipalThreadLocal.setName(remoteUser);
82  
83                  long userId = GetterUtil.getLong(remoteUser);
84  
85                  User user = UserLocalServiceUtil.getUserById(userId);
86  
87                  permissionChecker = PermissionCheckerFactory.create(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 WebDAVRequest(
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             try {
122                 PermissionCheckerFactory.recycle(permissionChecker);
123             }
124             catch (Exception e) {
125             }
126         }
127     }
128 
129     protected String getRootPath(HttpServletRequest request) {
130         StringBuilder sb = new StringBuilder();
131 
132         sb.append(WebDAVUtil.fixPath(request.getContextPath()));
133         sb.append(WebDAVUtil.fixPath(request.getServletPath()));
134 
135         return sb.toString();
136     }
137 
138     protected WebDAVStorage getStorage(HttpServletRequest request)
139         throws WebDAVException {
140 
141         String[] pathArray = WebDAVUtil.getPathArray(
142             request.getPathInfo(), true);
143 
144         String storageClass = null;
145 
146         if (pathArray.length == 1) {
147             storageClass = CompanyWebDAVStorageImpl.class.getName();
148         }
149         else if (pathArray.length == 2) {
150             storageClass = GroupWebDAVStorageImpl.class.getName();
151         }
152         else if (pathArray.length >= 3) {
153             storageClass = WebDAVUtil.getStorageClass(pathArray[2]);
154         }
155 
156         if (Validator.isNull(storageClass)) {
157             throw new WebDAVException(
158                 "Invalid WebDAV path " + request.getPathInfo());
159         }
160 
161         return (WebDAVStorage)InstancePool.get(storageClass);
162     }
163 
164     protected boolean isIgnoredResource(HttpServletRequest request) {
165         String[] pathArray = WebDAVUtil.getPathArray(
166             request.getPathInfo(), true);
167 
168         if ((pathArray == null) || (pathArray.length <= 0)) {
169             return false;
170         }
171 
172         String resourceName = pathArray[pathArray.length - 1];
173 
174         for (String ignore : PropsValues.WEBDAV_IGNORE) {
175             if (ignore.equals(resourceName)) {
176                 if (_log.isDebugEnabled()) {
177                     _log.debug(
178                         "Skipping over " + request.getMethod() + " " +
179                             request.getPathInfo());
180                 }
181 
182                 return true;
183             }
184         }
185 
186         return false;
187     }
188 
189     private static Log _log = LogFactoryUtil.getLog(WebDAVServlet.class);
190 
191 }