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annotate src/org/eclipse/jetty/server/handler/ResourceHandler.java @ 807:947b11aa3157
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| author | Franklin Schmidt <fschmidt@gmail.com> |
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| date | Wed, 07 Sep 2016 23:26:12 -0600 |
| parents | fc3e366caa51 |
| children | 8e9db0bbf4f9 |
| rev | line source |
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1 // |
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2 // ======================================================================== |
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3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
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4 // ------------------------------------------------------------------------ |
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5 // All rights reserved. This program and the accompanying materials |
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6 // are made available under the terms of the Eclipse Public License v1.0 |
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7 // and Apache License v2.0 which accompanies this distribution. |
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8 // |
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9 // The Eclipse Public License is available at |
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10 // http://www.eclipse.org/legal/epl-v10.html |
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11 // |
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12 // The Apache License v2.0 is available at |
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13 // http://www.opensource.org/licenses/apache2.0.php |
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14 // |
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15 // You may elect to redistribute this code under either of these licenses. |
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16 // ======================================================================== |
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17 // |
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18 |
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19 package org.eclipse.jetty.server.handler; |
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20 |
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21 import java.io.IOException; |
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22 import java.io.OutputStream; |
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23 import java.net.MalformedURLException; |
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24 |
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25 import javax.servlet.ServletException; |
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26 import javax.servlet.http.HttpServletRequest; |
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27 import javax.servlet.http.HttpServletResponse; |
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28 |
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29 import org.eclipse.jetty.http.HttpFields; |
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30 import org.eclipse.jetty.http.HttpHeaders; |
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31 import org.eclipse.jetty.http.HttpMethods; |
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32 import org.eclipse.jetty.http.HttpStatus; |
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33 import org.eclipse.jetty.http.MimeTypes; |
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34 import org.eclipse.jetty.io.Buffer; |
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35 import org.eclipse.jetty.io.ByteArrayBuffer; |
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36 import org.eclipse.jetty.io.WriterOutputStream; |
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37 import org.eclipse.jetty.server.AbstractHttpConnection; |
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38 import org.eclipse.jetty.server.Dispatcher; |
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39 import org.eclipse.jetty.server.Request; |
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40 import org.eclipse.jetty.server.Response; |
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41 import org.eclipse.jetty.server.handler.ContextHandler.Context; |
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42 import org.eclipse.jetty.util.URIUtil; |
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43 import org.eclipse.jetty.util.log.Log; |
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44 import org.eclipse.jetty.util.log.Logger; |
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45 import org.eclipse.jetty.util.resource.FileResource; |
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46 import org.eclipse.jetty.util.resource.Resource; |
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47 |
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48 |
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49 /* ------------------------------------------------------------ */ |
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50 /** Resource Handler. |
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51 * |
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52 * This handle will serve static content and handle If-Modified-Since headers. |
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53 * No caching is done. |
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54 * Requests for resources that do not exist are let pass (Eg no 404's). |
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55 * |
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56 * |
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57 * @org.apache.xbean.XBean |
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58 */ |
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59 public class ResourceHandler extends HandlerWrapper |
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60 { |
| 805 | 61 private static final Logger LOG = Log.getLogger(ResourceHandler.class); |
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62 |
| 805 | 63 ContextHandler _context; |
| 64 Resource _baseResource; | |
| 65 Resource _defaultStylesheet; | |
| 66 Resource _stylesheet; | |
| 67 String[] _welcomeFiles={"index.html"}; | |
| 68 MimeTypes _mimeTypes = new MimeTypes(); | |
| 69 ByteArrayBuffer _cacheControl; | |
| 70 boolean _aliases; | |
| 71 boolean _directory; | |
| 72 boolean _etags; | |
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73 |
| 805 | 74 /* ------------------------------------------------------------ */ |
| 75 public ResourceHandler() | |
| 76 { | |
| 77 | |
| 78 } | |
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79 |
| 805 | 80 /* ------------------------------------------------------------ */ |
| 81 public MimeTypes getMimeTypes() | |
| 82 { | |
| 83 return _mimeTypes; | |
| 84 } | |
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85 |
| 805 | 86 /* ------------------------------------------------------------ */ |
| 87 public void setMimeTypes(MimeTypes mimeTypes) | |
| 88 { | |
| 89 _mimeTypes = mimeTypes; | |
| 90 } | |
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91 |
| 805 | 92 /* ------------------------------------------------------------ */ |
| 93 /** | |
| 94 * @return True if resource aliases are allowed. | |
| 95 */ | |
| 96 public boolean isAliases() | |
| 97 { | |
| 98 return _aliases; | |
| 99 } | |
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100 |
| 805 | 101 /* ------------------------------------------------------------ */ |
| 102 /** | |
| 103 * Set if resource aliases (eg symlink, 8.3 names, case insensitivity) are allowed. | |
| 104 * Allowing aliases can significantly increase security vulnerabilities. | |
| 105 * If this handler is deployed inside a ContextHandler, then the | |
| 106 * {@link ContextHandler#isAliases()} takes precedent. | |
| 107 * @param aliases True if aliases are supported. | |
| 108 */ | |
| 109 public void setAliases(boolean aliases) | |
| 110 { | |
| 111 _aliases = aliases; | |
| 112 } | |
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113 |
| 805 | 114 /* ------------------------------------------------------------ */ |
| 115 /** Get the directory option. | |
| 116 * @return true if directories are listed. | |
| 117 */ | |
| 118 public boolean isDirectoriesListed() | |
| 119 { | |
| 120 return _directory; | |
| 121 } | |
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122 |
| 805 | 123 /* ------------------------------------------------------------ */ |
| 124 /** Set the directory. | |
| 125 * @param directory true if directories are listed. | |
| 126 */ | |
| 127 public void setDirectoriesListed(boolean directory) | |
| 128 { | |
| 129 _directory = directory; | |
| 130 } | |
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131 |
| 805 | 132 /* ------------------------------------------------------------ */ |
| 133 /** | |
| 134 * @return True if ETag processing is done | |
| 135 */ | |
| 136 public boolean isEtags() | |
| 137 { | |
| 138 return _etags; | |
| 139 } | |
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140 |
| 805 | 141 /* ------------------------------------------------------------ */ |
| 142 /** | |
| 143 * @param etags True if ETag processing is done | |
| 144 */ | |
| 145 public void setEtags(boolean etags) | |
| 146 { | |
| 147 _etags = etags; | |
| 148 } | |
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149 |
| 805 | 150 /* ------------------------------------------------------------ */ |
| 151 @Override | |
| 152 public void doStart() | |
| 153 throws Exception | |
| 154 { | |
| 155 Context scontext = ContextHandler.getCurrentContext(); | |
| 156 _context = (scontext==null?null:scontext.getContextHandler()); | |
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157 |
| 805 | 158 if (_context!=null) |
| 159 _aliases=_context.isAliases(); | |
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160 |
| 805 | 161 if (!_aliases && !FileResource.getCheckAliases()) |
| 162 throw new IllegalStateException("Alias checking disabled"); | |
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163 |
| 805 | 164 super.doStart(); |
| 165 } | |
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166 |
| 805 | 167 /* ------------------------------------------------------------ */ |
| 168 /** | |
| 169 * @return Returns the resourceBase. | |
| 170 */ | |
| 171 public Resource getBaseResource() | |
| 172 { | |
| 173 if (_baseResource==null) | |
| 174 return null; | |
| 175 return _baseResource; | |
| 176 } | |
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177 |
| 805 | 178 /* ------------------------------------------------------------ */ |
| 179 /** | |
| 180 * @return Returns the base resource as a string. | |
| 181 */ | |
| 182 public String getResourceBase() | |
| 183 { | |
| 184 if (_baseResource==null) | |
| 185 return null; | |
| 186 return _baseResource.toString(); | |
| 187 } | |
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188 |
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189 |
| 805 | 190 /* ------------------------------------------------------------ */ |
| 191 /** | |
| 192 * @param base The resourceBase to set. | |
| 193 */ | |
| 194 public void setBaseResource(Resource base) | |
| 195 { | |
| 196 _baseResource=base; | |
| 197 } | |
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198 |
| 805 | 199 /* ------------------------------------------------------------ */ |
| 200 /** | |
| 201 * @param resourceBase The base resource as a string. | |
| 202 */ | |
| 203 public void setResourceBase(String resourceBase) | |
| 204 { | |
| 205 try | |
| 206 { | |
| 207 setBaseResource(Resource.newResource(resourceBase)); | |
| 208 } | |
| 209 catch (Exception e) | |
| 210 { | |
| 211 LOG.warn(e.toString()); | |
| 212 LOG.debug(e); | |
| 213 throw new IllegalArgumentException(resourceBase); | |
| 214 } | |
| 215 } | |
| 216 | |
| 217 /* ------------------------------------------------------------ */ | |
| 218 /** | |
| 219 * @return Returns the stylesheet as a Resource. | |
| 220 */ | |
| 221 public Resource getStylesheet() | |
| 222 { | |
| 223 if(_stylesheet != null) | |
| 224 { | |
| 225 return _stylesheet; | |
| 226 } | |
| 227 else | |
| 228 { | |
| 229 if(_defaultStylesheet == null) | |
| 230 { | |
| 231 try | |
| 232 { | |
| 233 _defaultStylesheet = Resource.newResource(this.getClass().getResource("/org/eclipse/jetty/jetty-dir.css")); | |
| 234 } | |
| 235 catch(IOException e) | |
| 236 { | |
| 237 LOG.warn(e.toString()); | |
| 238 LOG.debug(e); | |
| 239 } | |
| 240 } | |
| 241 return _defaultStylesheet; | |
| 242 } | |
| 243 } | |
| 244 | |
| 245 /* ------------------------------------------------------------ */ | |
| 246 /** | |
| 247 * @param stylesheet The location of the stylesheet to be used as a String. | |
| 248 */ | |
| 249 public void setStylesheet(String stylesheet) | |
| 250 { | |
| 251 try | |
| 252 { | |
| 253 _stylesheet = Resource.newResource(stylesheet); | |
| 254 if(!_stylesheet.exists()) | |
| 255 { | |
| 256 LOG.warn("unable to find custom stylesheet: " + stylesheet); | |
| 257 _stylesheet = null; | |
| 258 } | |
| 259 } | |
| 260 catch(Exception e) | |
| 261 { | |
| 262 LOG.warn(e.toString()); | |
| 263 LOG.debug(e); | |
| 264 throw new IllegalArgumentException(stylesheet.toString()); | |
| 265 } | |
| 266 } | |
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267 |
| 805 | 268 /* ------------------------------------------------------------ */ |
| 269 /** | |
| 270 * @return the cacheControl header to set on all static content. | |
| 271 */ | |
| 272 public String getCacheControl() | |
| 273 { | |
| 274 return _cacheControl.toString(); | |
| 275 } | |
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276 |
| 805 | 277 /* ------------------------------------------------------------ */ |
| 278 /** | |
| 279 * @param cacheControl the cacheControl header to set on all static content. | |
| 280 */ | |
| 281 public void setCacheControl(String cacheControl) | |
| 282 { | |
| 283 _cacheControl=cacheControl==null?null:new ByteArrayBuffer(cacheControl); | |
| 284 } | |
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285 |
| 805 | 286 /* ------------------------------------------------------------ */ |
| 287 /* | |
| 288 */ | |
| 289 public Resource getResource(String path) throws MalformedURLException | |
| 290 { | |
| 291 if (path==null || !path.startsWith("/")) | |
| 292 throw new MalformedURLException(path); | |
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293 |
| 805 | 294 Resource base = _baseResource; |
| 295 if (base==null) | |
| 296 { | |
| 297 if (_context==null) | |
| 298 return null; | |
| 299 base=_context.getBaseResource(); | |
| 300 if (base==null) | |
| 301 return null; | |
| 302 } | |
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303 |
| 805 | 304 try |
| 305 { | |
| 306 path=URIUtil.canonicalPath(path); | |
| 307 return base.addPath(path); | |
| 308 } | |
| 309 catch(Exception e) | |
| 310 { | |
| 311 LOG.ignore(e); | |
| 312 } | |
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313 |
| 805 | 314 return null; |
| 315 } | |
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316 |
| 805 | 317 /* ------------------------------------------------------------ */ |
| 318 protected Resource getResource(HttpServletRequest request) throws MalformedURLException | |
| 319 { | |
| 320 String servletPath; | |
| 321 String pathInfo; | |
| 322 Boolean included = request.getAttribute(Dispatcher.INCLUDE_REQUEST_URI) != null; | |
| 323 if (included != null && included.booleanValue()) | |
| 324 { | |
| 325 servletPath = (String)request.getAttribute(Dispatcher.INCLUDE_SERVLET_PATH); | |
| 326 pathInfo = (String)request.getAttribute(Dispatcher.INCLUDE_PATH_INFO); | |
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327 |
| 805 | 328 if (servletPath == null && pathInfo == null) |
| 329 { | |
| 330 servletPath = request.getServletPath(); | |
| 331 pathInfo = request.getPathInfo(); | |
| 332 } | |
| 333 } | |
| 334 else | |
| 335 { | |
| 336 servletPath = request.getServletPath(); | |
| 337 pathInfo = request.getPathInfo(); | |
| 338 } | |
| 339 | |
| 340 String pathInContext=URIUtil.addPaths(servletPath,pathInfo); | |
| 341 return getResource(pathInContext); | |
| 342 } | |
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343 |
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344 |
| 805 | 345 /* ------------------------------------------------------------ */ |
| 346 public String[] getWelcomeFiles() | |
| 347 { | |
| 348 return _welcomeFiles; | |
| 349 } | |
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350 |
| 805 | 351 /* ------------------------------------------------------------ */ |
| 352 public void setWelcomeFiles(String[] welcomeFiles) | |
| 353 { | |
| 354 _welcomeFiles=welcomeFiles; | |
| 355 } | |
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356 |
| 805 | 357 /* ------------------------------------------------------------ */ |
| 358 protected Resource getWelcome(Resource directory) throws MalformedURLException, IOException | |
| 359 { | |
| 360 for (int i=0;i<_welcomeFiles.length;i++) | |
| 361 { | |
| 362 Resource welcome=directory.addPath(_welcomeFiles[i]); | |
| 363 if (welcome.exists() && !welcome.isDirectory()) | |
| 364 return welcome; | |
| 365 } | |
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366 |
| 805 | 367 return null; |
| 368 } | |
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369 |
| 805 | 370 /* ------------------------------------------------------------ */ |
| 371 /* | |
| 372 * @see org.eclipse.jetty.server.Handler#handle(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, int) | |
| 373 */ | |
| 374 public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException | |
| 375 { | |
| 376 if (baseRequest.isHandled()) | |
| 377 return; | |
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378 |
| 805 | 379 boolean skipContentBody = false; |
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380 |
| 805 | 381 if(!HttpMethods.GET.equals(request.getMethod())) |
| 382 { | |
| 383 if(!HttpMethods.HEAD.equals(request.getMethod())) | |
| 384 { | |
| 385 //try another handler | |
| 386 super.handle(target, baseRequest, request, response); | |
| 387 return; | |
| 388 } | |
| 389 skipContentBody = true; | |
| 390 } | |
| 391 | |
| 392 Resource resource = getResource(request); | |
| 393 | |
| 394 if (resource==null || !resource.exists()) | |
| 395 { | |
| 396 if (target.endsWith("/jetty-dir.css")) | |
| 397 { | |
| 398 resource = getStylesheet(); | |
| 399 if (resource==null) | |
| 400 return; | |
| 401 response.setContentType("text/css"); | |
| 402 } | |
| 403 else | |
| 404 { | |
| 405 //no resource - try other handlers | |
| 406 super.handle(target, baseRequest, request, response); | |
| 407 return; | |
| 408 } | |
| 409 } | |
| 410 | |
| 411 if (!_aliases && resource.getAlias()!=null) | |
| 412 { | |
| 413 LOG.info(resource+" aliased to "+resource.getAlias()); | |
| 414 return; | |
| 415 } | |
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416 |
| 805 | 417 // We are going to serve something |
| 418 baseRequest.setHandled(true); | |
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419 |
| 805 | 420 if (resource.isDirectory()) |
| 421 { | |
| 422 if (!request.getPathInfo().endsWith(URIUtil.SLASH)) | |
| 423 { | |
| 424 response.sendRedirect(response.encodeRedirectURL(URIUtil.addPaths(request.getRequestURI(),URIUtil.SLASH))); | |
| 425 return; | |
| 426 } | |
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427 |
| 805 | 428 Resource welcome=getWelcome(resource); |
| 429 if (welcome!=null && welcome.exists()) | |
| 430 resource=welcome; | |
| 431 else | |
| 432 { | |
| 433 doDirectory(request,response,resource); | |
| 434 baseRequest.setHandled(true); | |
| 435 return; | |
| 436 } | |
| 437 } | |
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438 |
| 805 | 439 // set some headers |
| 440 long last_modified=resource.lastModified(); | |
| 441 String etag=null; | |
| 442 if (_etags) | |
| 443 { | |
| 444 // simple handling of only a single etag | |
| 445 String ifnm = request.getHeader(HttpHeaders.IF_NONE_MATCH); | |
| 446 etag=resource.getWeakETag(); | |
| 447 if (ifnm!=null && resource!=null && ifnm.equals(etag)) | |
| 448 { | |
| 449 response.setStatus(HttpStatus.NOT_MODIFIED_304); | |
| 450 baseRequest.getResponse().getHttpFields().put(HttpHeaders.ETAG_BUFFER,etag); | |
| 451 return; | |
| 452 } | |
| 453 } | |
| 454 | |
| 455 | |
| 456 if (last_modified>0) | |
| 457 { | |
| 458 long if_modified=request.getDateHeader(HttpHeaders.IF_MODIFIED_SINCE); | |
| 459 if (if_modified>0 && last_modified/1000<=if_modified/1000) | |
| 460 { | |
| 461 response.setStatus(HttpStatus.NOT_MODIFIED_304); | |
| 462 return; | |
| 463 } | |
| 464 } | |
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465 |
| 805 | 466 Buffer mime=_mimeTypes.getMimeByExtension(resource.toString()); |
| 467 if (mime==null) | |
| 468 mime=_mimeTypes.getMimeByExtension(request.getPathInfo()); | |
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469 |
| 805 | 470 // set the headers |
| 471 doResponseHeaders(response,resource,mime!=null?mime.toString():null); | |
| 472 response.setDateHeader(HttpHeaders.LAST_MODIFIED,last_modified); | |
| 473 if (_etags) | |
| 474 baseRequest.getResponse().getHttpFields().put(HttpHeaders.ETAG_BUFFER,etag); | |
| 475 | |
| 476 if(skipContentBody) | |
| 477 return; | |
| 478 // Send the content | |
| 479 OutputStream out =null; | |
| 480 try {out = response.getOutputStream();} | |
| 481 catch(IllegalStateException e) {out = new WriterOutputStream(response.getWriter());} | |
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482 |
| 805 | 483 // See if a short direct method can be used? |
| 484 if (out instanceof AbstractHttpConnection.Output) | |
| 485 { | |
| 486 // TODO file mapped buffers | |
| 487 ((AbstractHttpConnection.Output)out).sendContent(resource.getInputStream()); | |
| 488 } | |
| 489 else | |
| 490 { | |
| 491 // Write content normally | |
| 492 resource.writeTo(out,0,resource.length()); | |
| 493 } | |
| 494 } | |
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495 |
| 805 | 496 /* ------------------------------------------------------------ */ |
| 497 protected void doDirectory(HttpServletRequest request,HttpServletResponse response, Resource resource) | |
| 498 throws IOException | |
| 499 { | |
| 500 if (_directory) | |
| 501 { | |
| 502 String listing = resource.getListHTML(request.getRequestURI(),request.getPathInfo().lastIndexOf("/") > 0); | |
| 503 response.setContentType("text/html; charset=UTF-8"); | |
| 504 response.getWriter().println(listing); | |
| 505 } | |
| 506 else | |
| 507 response.sendError(HttpStatus.FORBIDDEN_403); | |
| 508 } | |
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509 |
| 805 | 510 /* ------------------------------------------------------------ */ |
| 511 /** Set the response headers. | |
| 512 * This method is called to set the response headers such as content type and content length. | |
| 513 * May be extended to add additional headers. | |
| 514 * @param response | |
| 515 * @param resource | |
| 516 * @param mimeType | |
| 517 */ | |
| 518 protected void doResponseHeaders(HttpServletResponse response, Resource resource, String mimeType) | |
| 519 { | |
| 520 if (mimeType!=null) | |
| 521 response.setContentType(mimeType); | |
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522 |
| 805 | 523 long length=resource.length(); |
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524 |
| 805 | 525 if (response instanceof Response) |
| 526 { | |
| 527 HttpFields fields = ((Response)response).getHttpFields(); | |
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528 |
| 805 | 529 if (length>0) |
| 530 fields.putLongField(HttpHeaders.CONTENT_LENGTH_BUFFER,length); | |
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531 |
| 805 | 532 if (_cacheControl!=null) |
| 533 fields.put(HttpHeaders.CACHE_CONTROL_BUFFER,_cacheControl); | |
| 534 } | |
| 535 else | |
| 536 { | |
| 537 if (length>0) | |
| 538 response.setHeader(HttpHeaders.CONTENT_LENGTH,Long.toString(length)); | |
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539 |
| 805 | 540 if (_cacheControl!=null) |
| 541 response.setHeader(HttpHeaders.CACHE_CONTROL,_cacheControl.toString()); | |
| 542 } | |
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543 |
| 805 | 544 } |
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545 } |