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1
23
24 package org.apache.slide.webdav;
25
26 import java.io.IOException  ;
27 import java.net.URL ;
28 import java.text.SimpleDateFormat ;
29 import java.util.Date ;
30
31 import javax.servlet.RequestDispatcher ;
32 import javax.servlet.ServletConfig ;
33 import javax.servlet.ServletException ;
34 import javax.servlet.UnavailableException ;
35 import javax.servlet.http.HttpServlet ;
36 import javax.servlet.http.HttpServletRequest ;
37 import javax.servlet.http.HttpServletResponse ;
38 import javax.xml.parsers.DocumentBuilderFactory ;
39 import javax.xml.parsers.FactoryConfigurationError ;
40 import javax.xml.parsers.ParserConfigurationException ;
41
42 import org.apache.slide.authenticate.SecurityToken;
43 import org.apache.slide.common.Domain;
44 import org.apache.slide.common.DomainInitializationFailedError;
45 import org.apache.slide.common.NamespaceAccessToken;
46 import org.apache.slide.common.SlideException;
47 import org.apache.slide.common.SlideToken;
48 import org.apache.slide.common.SlideTokenWrapper;
49 import org.apache.slide.security.AccessDeniedException;
50 import org.apache.slide.structure.LinkedObjectNotFoundException;
51 import org.apache.slide.structure.ObjectNotFoundException;
52 import org.apache.slide.util.logger.Logger;
53 import org.apache.slide.webdav.util.DirectoryIndexGenerator;
54 import org.apache.slide.webdav.util.WebdavConstants;
55 import org.apache.slide.webdav.util.WebdavStatus;
56 import org.apache.slide.webdav.util.WebdavUtils;
57
58
64 public class WebdavServlet extends HttpServlet {
65
66
68
69
72 private static final String LOG_CHANNEL = WebdavServlet.class.getName();
73
74
75
80 public static final String ATTRIBUTE_NAME =
81 "org.apache.slide.NamespaceAccessToken";
82
83
84
86
87
90 protected NamespaceAccessToken token;
91
92
93
96 protected boolean directoryBrowsing = true;
97
98
99
102 protected RequestDispatcher directoryBrowsingTemplate;
103
104
105
108 protected DirectoryIndexGenerator directoryIndexGenerator;
109
110
111
114 protected boolean handleLifecycle = true;
115
116
117
120 protected WebdavMethodFactory methodFactory;
121
122
123
125
126 protected void service (HttpServletRequest req, HttpServletResponse resp)
127 throws ServletException , IOException {
128
129 SimpleDateFormat sdf = new SimpleDateFormat ();
130 if( token.getLogger().isEnabled(LOG_CHANNEL, Logger.DEBUG) )
131 token.getLogger().log("==> "+req.getMethod()+" start: "+sdf.format(new Date (System.currentTimeMillis()))+" ["+Thread.currentThread().getName()+"]", LOG_CHANNEL, Logger.DEBUG);
132
133 req.setAttribute("slide_uri", WebdavUtils.getRelativePath(req, (WebdavServletConfig) getServletConfig()));
134
135 try {
136
137 if (token == null) {
138 String namespaceName = req.getContextPath();
139 if ((namespaceName == null) || (namespaceName.equals(""))) {
140 namespaceName = Domain.getDefaultNamespace();
141 }
142 while (namespaceName.startsWith("/")) {
143 namespaceName = namespaceName.substring(1);
144 }
145 token = Domain.accessNamespace(new SecurityToken(this), namespaceName);
146 }
147
148 resp.setStatus(WebdavStatus.SC_OK);
149
150 String methodName = req.getMethod();
151 WebdavMethod method = methodFactory.createMethod(methodName);
152 if (method == null) {
153 throw new WebdavException(WebdavStatus.SC_METHOD_NOT_ALLOWED);
154 } else {
155 method.run(req, resp);
156 }
157 } catch (WebdavException e) {
158 token.getLogger().log(e,LOG_CHANNEL, Logger.ERROR);
160 try { resp.sendError(e.getStatusCode()); } catch (Throwable ex) { }
161 } catch (Throwable e) {
162 token.getLogger().log(e,LOG_CHANNEL, Logger.ERROR);
164 try { resp.sendError(WebdavStatus.SC_INTERNAL_SERVER_ERROR); } catch (Throwable ex) { }
165 }
166 finally {
167 if( token.getLogger().isEnabled(LOG_CHANNEL, Logger.DEBUG) )
168 token.getLogger().log("<== "+req.getMethod()+" end: "+sdf.format(new Date (System.currentTimeMillis()))+" ["+Thread.currentThread().getName()+"]", LOG_CHANNEL, Logger.DEBUG);
169 }
170
171 }
172
173 private boolean isExtTx(HttpServletRequest req) {
174 String hTxIdStr = req.getHeader(WebdavConstants.H_TRANSACTION);
175 return (hTxIdStr != null);
176 }
177
178 private boolean isCollection(HttpServletRequest req) {
179 SlideToken slideToken = new SlideTokenWrapper(WebdavUtils.getSlideToken(req));
180 slideToken.setForceStoreEnlistment(false);
182 slideToken.setForceSecurity(false);
183 slideToken.setForceLock(false);
184
185 return WebdavUtils.isCollection(token, slideToken, WebdavUtils.getRelativePath(req, (WebdavServletConfig)getServletConfig()));
186 }
187
188
192 public void init(ServletConfig config)
193 throws ServletException {
194
195 super.init(new WebdavServletConfig(config));
196
197 }
199
200
201
204 public void init()
205 throws ServletException {
206
207 if (!isDomLevel2Parser()) {
208 System.out.println("======================================================");
209 System.out.println("!!! Unable to start Slide Servlet !!!");
210 System.out.println("------------------------------------------------------");
211 System.out.println("You are using using an incorrect older XML parser");
212 System.out.println("that doesn't provide Element::getElementsByTagNameNS");
213 System.out.println("consult the documentation for a list of valid XML parsers.");
214 System.out.println("======================================================");
215
216 log("======================================================");
217 log("!!! Unable to start Slide Servlet !!!");
218 log("------------------------------------------------------");
219 log("======================================================");
220 log("You are using using an incorrect older XML parser");
221 log("that doesn't provide Element::getElementsByTagNameNS");
222 log("consult the documentation for a list of valid XML parsers.");
223 log("======================================================");
224 throw new ServletException ("Invalid XML parser");
225 }
226
227 String value = null;
228
229
232 token = (NamespaceAccessToken)
234 getServletContext().getAttribute(ATTRIBUTE_NAME);
235 if (token == null) {
236 String namespaceName = null;
238 String domainConfigFile = null;
239 value = getInitParameter("namespace");
240 if (value != null) {
241 namespaceName = value;
242 }
243 value = getInitParameter("domain");
244 if (value != null) {
245 domainConfigFile = value;
246 }
247 try {
248
249 if (domainConfigFile != null) {
250 URL domainConfigFileURL =
251 getServletContext().getResource(domainConfigFile);
252 if (domainConfigFileURL != null) {
253 Domain.init(domainConfigFileURL);
254 }
255 }
256
257 if (namespaceName == null) {
258 namespaceName = Domain.getDefaultNamespace();
259 log("No namespace specified, will use default namespace: " +
260 namespaceName);
261 }
262
263 token = Domain.accessNamespace
264 (new SecurityToken(this), namespaceName);
265 if (token == null) {
266 log("Could not access namespace " + namespaceName + ".");
267 throw new UnavailableException ("Namespace " + namespaceName +
268 " not accessible");
269 }
270 getServletContext().setAttribute(ATTRIBUTE_NAME, token);
271
272 } catch (DomainInitializationFailedError e) {
273 log("Could not initialize domain", e);
274 throw new UnavailableException (e.toString());
275 } catch (Throwable t) {
276 t.printStackTrace();
277 throw new ServletException (t.toString());
278 }
279 } else {
280 handleLifecycle = false;
281 }
282
283 methodFactory =
285 WebdavMethodFactory.newInstance((WebdavServletConfig)getServletConfig());
286
287 }
307
308
309
312 public void destroy() {
313
314 if (handleLifecycle) {
315 if (token != null) {
316 Domain.closeNamespace(token);
317 }
318 }
319 }
320
321
322
323
325
326
329
358 static boolean isDomLevel2Parser() {
359 try {
360 return DocumentBuilderFactory.newInstance().newDocumentBuilder()
361 .getDOMImplementation().hasFeature("Core", "2.0");
362 } catch (ParserConfigurationException e) {
363 return false;
364 } catch (FactoryConfigurationError e) {
365 return false;
366 }
367 }
368
369 }
370
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