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annotate src/org/eclipse/jetty/server/handler/ResourceHandler.java @ 992:0608a6664bee
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| author | Franklin Schmidt <fschmidt@gmail.com> |
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| date | Tue, 18 Oct 2016 15:23:25 -0600 |
| parents | 688c39c50ee3 |
| children | 4e9d373bf6e9 |
| 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; |
| 822 | 38 import javax.servlet.RequestDispatcher; |
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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.util.URIUtil; |
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42 import org.slf4j.Logger; |
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43 import org.slf4j.LoggerFactory; |
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44 import org.eclipse.jetty.util.resource.FileResource; |
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45 import org.eclipse.jetty.util.resource.Resource; |
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46 |
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47 |
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48 /* ------------------------------------------------------------ */ |
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49 /** Resource Handler. |
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50 * |
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51 * This handle will serve static content and handle If-Modified-Since headers. |
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52 * No caching is done. |
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53 * Requests for resources that do not exist are let pass (Eg no 404's). |
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54 * |
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55 * |
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56 * @org.apache.xbean.XBean |
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57 */ |
| 992 | 58 public final class ResourceHandler extends HandlerWrapper |
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59 { |
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60 private static final Logger LOG = LoggerFactory.getLogger(ResourceHandler.class); |
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61 |
| 805 | 62 ContextHandler _context; |
| 63 Resource _baseResource; | |
| 64 Resource _defaultStylesheet; | |
| 65 Resource _stylesheet; | |
| 66 String[] _welcomeFiles={"index.html"}; | |
| 67 MimeTypes _mimeTypes = new MimeTypes(); | |
| 68 ByteArrayBuffer _cacheControl; | |
| 69 boolean _aliases; | |
| 70 boolean _directory; | |
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71 |
| 805 | 72 /* ------------------------------------------------------------ */ |
| 73 public ResourceHandler() | |
| 74 { | |
| 75 | |
| 76 } | |
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77 |
| 805 | 78 /* ------------------------------------------------------------ */ |
| 79 public MimeTypes getMimeTypes() | |
| 80 { | |
| 81 return _mimeTypes; | |
| 82 } | |
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83 |
| 805 | 84 /* ------------------------------------------------------------ */ |
| 85 public void setMimeTypes(MimeTypes mimeTypes) | |
| 86 { | |
| 87 _mimeTypes = mimeTypes; | |
| 88 } | |
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89 |
| 805 | 90 /* ------------------------------------------------------------ */ |
| 91 /** | |
| 92 * @return True if resource aliases are allowed. | |
| 93 */ | |
| 94 public boolean isAliases() | |
| 95 { | |
| 96 return _aliases; | |
| 97 } | |
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98 |
| 805 | 99 /* ------------------------------------------------------------ */ |
| 100 /** | |
| 101 * Set if resource aliases (eg symlink, 8.3 names, case insensitivity) are allowed. | |
| 102 * Allowing aliases can significantly increase security vulnerabilities. | |
| 103 * If this handler is deployed inside a ContextHandler, then the | |
| 104 * {@link ContextHandler#isAliases()} takes precedent. | |
| 105 * @param aliases True if aliases are supported. | |
| 106 */ | |
| 107 public void setAliases(boolean aliases) | |
| 108 { | |
| 109 _aliases = aliases; | |
| 110 } | |
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111 |
| 805 | 112 /* ------------------------------------------------------------ */ |
| 113 /** Get the directory option. | |
| 114 * @return true if directories are listed. | |
| 115 */ | |
| 116 public boolean isDirectoriesListed() | |
| 117 { | |
| 118 return _directory; | |
| 119 } | |
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120 |
| 805 | 121 /* ------------------------------------------------------------ */ |
| 122 /** Set the directory. | |
| 123 * @param directory true if directories are listed. | |
| 124 */ | |
| 125 public void setDirectoriesListed(boolean directory) | |
| 126 { | |
| 127 _directory = directory; | |
| 128 } | |
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129 |
| 805 | 130 /* ------------------------------------------------------------ */ |
| 131 @Override | |
| 132 public void doStart() | |
| 133 throws Exception | |
| 134 { | |
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135 _context = ContextHandler.getCurrentContext(); |
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136 |
| 805 | 137 if (!_aliases && !FileResource.getCheckAliases()) |
| 138 throw new IllegalStateException("Alias checking disabled"); | |
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139 |
| 805 | 140 super.doStart(); |
| 141 } | |
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142 |
| 805 | 143 /* ------------------------------------------------------------ */ |
| 144 /** | |
| 145 * @return Returns the resourceBase. | |
| 146 */ | |
| 147 public Resource getBaseResource() | |
| 148 { | |
| 149 if (_baseResource==null) | |
| 150 return null; | |
| 151 return _baseResource; | |
| 152 } | |
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153 |
| 805 | 154 /* ------------------------------------------------------------ */ |
| 155 /** | |
| 156 * @return Returns the base resource as a string. | |
| 157 */ | |
| 158 public String getResourceBase() | |
| 159 { | |
| 160 if (_baseResource==null) | |
| 161 return null; | |
| 162 return _baseResource.toString(); | |
| 163 } | |
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164 |
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165 |
| 805 | 166 /* ------------------------------------------------------------ */ |
| 167 /** | |
| 168 * @param base The resourceBase to set. | |
| 169 */ | |
| 170 public void setBaseResource(Resource base) | |
| 171 { | |
| 172 _baseResource=base; | |
| 173 } | |
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174 |
| 805 | 175 /* ------------------------------------------------------------ */ |
| 176 /** | |
| 177 * @param resourceBase The base resource as a string. | |
| 178 */ | |
| 179 public void setResourceBase(String resourceBase) | |
| 180 { | |
| 181 try | |
| 182 { | |
| 183 setBaseResource(Resource.newResource(resourceBase)); | |
| 184 } | |
| 185 catch (Exception e) | |
| 186 { | |
| 187 LOG.warn(e.toString()); | |
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188 LOG.debug("",e); |
| 805 | 189 throw new IllegalArgumentException(resourceBase); |
| 190 } | |
| 191 } | |
| 192 | |
| 193 /* ------------------------------------------------------------ */ | |
| 194 /** | |
| 195 * @return Returns the stylesheet as a Resource. | |
| 196 */ | |
| 197 public Resource getStylesheet() | |
| 198 { | |
| 199 if(_stylesheet != null) | |
| 200 { | |
| 201 return _stylesheet; | |
| 202 } | |
| 203 else | |
| 204 { | |
| 205 if(_defaultStylesheet == null) | |
| 206 { | |
| 207 try | |
| 208 { | |
| 209 _defaultStylesheet = Resource.newResource(this.getClass().getResource("/org/eclipse/jetty/jetty-dir.css")); | |
| 210 } | |
| 211 catch(IOException e) | |
| 212 { | |
| 213 LOG.warn(e.toString()); | |
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214 LOG.debug("",e); |
| 805 | 215 } |
| 216 } | |
| 217 return _defaultStylesheet; | |
| 218 } | |
| 219 } | |
| 220 | |
| 221 /* ------------------------------------------------------------ */ | |
| 222 /** | |
| 223 * @param stylesheet The location of the stylesheet to be used as a String. | |
| 224 */ | |
| 225 public void setStylesheet(String stylesheet) | |
| 226 { | |
| 227 try | |
| 228 { | |
| 229 _stylesheet = Resource.newResource(stylesheet); | |
| 230 if(!_stylesheet.exists()) | |
| 231 { | |
| 232 LOG.warn("unable to find custom stylesheet: " + stylesheet); | |
| 233 _stylesheet = null; | |
| 234 } | |
| 235 } | |
| 236 catch(Exception e) | |
| 237 { | |
| 238 LOG.warn(e.toString()); | |
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239 LOG.debug("",e); |
| 805 | 240 throw new IllegalArgumentException(stylesheet.toString()); |
| 241 } | |
| 242 } | |
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243 |
| 805 | 244 /* ------------------------------------------------------------ */ |
| 245 /** | |
| 246 * @return the cacheControl header to set on all static content. | |
| 247 */ | |
| 248 public String getCacheControl() | |
| 249 { | |
| 250 return _cacheControl.toString(); | |
| 251 } | |
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252 |
| 805 | 253 /* ------------------------------------------------------------ */ |
| 254 /** | |
| 255 * @param cacheControl the cacheControl header to set on all static content. | |
| 256 */ | |
| 257 public void setCacheControl(String cacheControl) | |
| 258 { | |
| 259 _cacheControl=cacheControl==null?null:new ByteArrayBuffer(cacheControl); | |
| 260 } | |
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261 |
| 992 | 262 private Resource getResource(String path) throws MalformedURLException |
| 805 | 263 { |
| 264 if (path==null || !path.startsWith("/")) | |
| 265 throw new MalformedURLException(path); | |
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266 |
| 805 | 267 Resource base = _baseResource; |
| 268 if (base==null) | |
| 269 { | |
| 270 if (_context==null) | |
| 271 return null; | |
| 992 | 272 base = _context.getBaseResource(); |
| 805 | 273 if (base==null) |
| 274 return null; | |
| 275 } | |
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276 |
| 805 | 277 try |
| 278 { | |
| 992 | 279 path = URIUtil.canonicalPath(path); |
| 805 | 280 return base.addPath(path); |
| 281 } | |
| 282 catch(Exception e) | |
| 283 { | |
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284 LOG.trace("",e); |
| 805 | 285 } |
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286 |
| 805 | 287 return null; |
| 288 } | |
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289 |
| 992 | 290 private Resource getResource(HttpServletRequest request) throws MalformedURLException |
| 805 | 291 { |
| 292 String servletPath; | |
| 293 String pathInfo; | |
| 822 | 294 Boolean included = request.getAttribute(RequestDispatcher.INCLUDE_REQUEST_URI) != null; |
| 805 | 295 if (included != null && included.booleanValue()) |
| 296 { | |
| 822 | 297 servletPath = (String)request.getAttribute(RequestDispatcher.INCLUDE_SERVLET_PATH); |
| 298 pathInfo = (String)request.getAttribute(RequestDispatcher.INCLUDE_PATH_INFO); | |
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299 |
| 805 | 300 if (servletPath == null && pathInfo == null) |
| 301 { | |
| 302 servletPath = request.getServletPath(); | |
| 303 pathInfo = request.getPathInfo(); | |
| 304 } | |
| 305 } | |
| 306 else | |
| 307 { | |
| 308 servletPath = request.getServletPath(); | |
| 309 pathInfo = request.getPathInfo(); | |
| 310 } | |
| 311 | |
| 992 | 312 String pathInContext = URIUtil.addPaths(servletPath,pathInfo); |
| 805 | 313 return getResource(pathInContext); |
| 314 } | |
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316 |
| 805 | 317 /* ------------------------------------------------------------ */ |
| 318 public String[] getWelcomeFiles() | |
| 319 { | |
| 320 return _welcomeFiles; | |
| 321 } | |
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322 |
| 805 | 323 /* ------------------------------------------------------------ */ |
| 324 public void setWelcomeFiles(String[] welcomeFiles) | |
| 325 { | |
| 326 _welcomeFiles=welcomeFiles; | |
| 327 } | |
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328 |
| 805 | 329 /* ------------------------------------------------------------ */ |
| 330 protected Resource getWelcome(Resource directory) throws MalformedURLException, IOException | |
| 331 { | |
| 332 for (int i=0;i<_welcomeFiles.length;i++) | |
| 333 { | |
| 334 Resource welcome=directory.addPath(_welcomeFiles[i]); | |
| 335 if (welcome.exists() && !welcome.isDirectory()) | |
| 336 return welcome; | |
| 337 } | |
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338 |
| 805 | 339 return null; |
| 340 } | |
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341 |
| 805 | 342 /* ------------------------------------------------------------ */ |
| 343 /* | |
| 344 * @see org.eclipse.jetty.server.Handler#handle(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, int) | |
| 345 */ | |
| 346 public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException | |
| 347 { | |
| 348 if (baseRequest.isHandled()) | |
| 349 return; | |
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350 |
| 805 | 351 boolean skipContentBody = false; |
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352 |
| 805 | 353 if(!HttpMethods.GET.equals(request.getMethod())) |
| 354 { | |
| 355 if(!HttpMethods.HEAD.equals(request.getMethod())) | |
| 356 { | |
| 357 //try another handler | |
| 358 super.handle(target, baseRequest, request, response); | |
| 359 return; | |
| 360 } | |
| 361 skipContentBody = true; | |
| 362 } | |
| 363 | |
| 364 Resource resource = getResource(request); | |
| 365 | |
| 366 if (resource==null || !resource.exists()) | |
| 367 { | |
| 368 if (target.endsWith("/jetty-dir.css")) | |
| 369 { | |
| 370 resource = getStylesheet(); | |
| 371 if (resource==null) | |
| 372 return; | |
| 373 response.setContentType("text/css"); | |
| 374 } | |
| 375 else | |
| 376 { | |
| 377 //no resource - try other handlers | |
| 378 super.handle(target, baseRequest, request, response); | |
| 379 return; | |
| 380 } | |
| 381 } | |
| 382 | |
| 383 if (!_aliases && resource.getAlias()!=null) | |
| 384 { | |
| 385 LOG.info(resource+" aliased to "+resource.getAlias()); | |
| 386 return; | |
| 387 } | |
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388 |
| 805 | 389 // We are going to serve something |
| 390 baseRequest.setHandled(true); | |
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391 |
| 805 | 392 if (resource.isDirectory()) |
| 393 { | |
| 394 if (!request.getPathInfo().endsWith(URIUtil.SLASH)) | |
| 395 { | |
| 396 response.sendRedirect(response.encodeRedirectURL(URIUtil.addPaths(request.getRequestURI(),URIUtil.SLASH))); | |
| 397 return; | |
| 398 } | |
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399 |
| 805 | 400 Resource welcome=getWelcome(resource); |
| 401 if (welcome!=null && welcome.exists()) | |
| 402 resource=welcome; | |
| 403 else | |
| 404 { | |
| 405 doDirectory(request,response,resource); | |
| 406 baseRequest.setHandled(true); | |
| 407 return; | |
| 408 } | |
| 409 } | |
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410 |
| 805 | 411 // set some headers |
| 412 long last_modified=resource.lastModified(); | |
| 413 if (last_modified>0) | |
| 414 { | |
| 415 long if_modified=request.getDateHeader(HttpHeaders.IF_MODIFIED_SINCE); | |
| 416 if (if_modified>0 && last_modified/1000<=if_modified/1000) | |
| 417 { | |
| 418 response.setStatus(HttpStatus.NOT_MODIFIED_304); | |
| 419 return; | |
| 420 } | |
| 421 } | |
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422 |
| 805 | 423 Buffer mime=_mimeTypes.getMimeByExtension(resource.toString()); |
| 424 if (mime==null) | |
| 425 mime=_mimeTypes.getMimeByExtension(request.getPathInfo()); | |
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426 |
| 805 | 427 // set the headers |
| 428 doResponseHeaders(response,resource,mime!=null?mime.toString():null); | |
| 429 response.setDateHeader(HttpHeaders.LAST_MODIFIED,last_modified); | |
| 430 | |
| 431 if(skipContentBody) | |
| 432 return; | |
| 433 // Send the content | |
| 434 OutputStream out =null; | |
| 435 try {out = response.getOutputStream();} | |
| 436 catch(IllegalStateException e) {out = new WriterOutputStream(response.getWriter());} | |
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437 |
| 805 | 438 // See if a short direct method can be used? |
| 439 if (out instanceof AbstractHttpConnection.Output) | |
| 440 { | |
| 441 // TODO file mapped buffers | |
| 442 ((AbstractHttpConnection.Output)out).sendContent(resource.getInputStream()); | |
| 443 } | |
| 444 else | |
| 445 { | |
| 446 // Write content normally | |
| 447 resource.writeTo(out,0,resource.length()); | |
| 448 } | |
| 449 } | |
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450 |
| 805 | 451 /* ------------------------------------------------------------ */ |
| 452 protected void doDirectory(HttpServletRequest request,HttpServletResponse response, Resource resource) | |
| 453 throws IOException | |
| 454 { | |
| 455 if (_directory) | |
| 456 { | |
| 457 String listing = resource.getListHTML(request.getRequestURI(),request.getPathInfo().lastIndexOf("/") > 0); | |
| 458 response.setContentType("text/html; charset=UTF-8"); | |
| 459 response.getWriter().println(listing); | |
| 460 } | |
| 461 else | |
| 462 response.sendError(HttpStatus.FORBIDDEN_403); | |
| 463 } | |
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464 |
| 805 | 465 /* ------------------------------------------------------------ */ |
| 466 /** Set the response headers. | |
| 467 * This method is called to set the response headers such as content type and content length. | |
| 468 * May be extended to add additional headers. | |
| 469 * @param response | |
| 470 * @param resource | |
| 471 * @param mimeType | |
| 472 */ | |
| 473 protected void doResponseHeaders(HttpServletResponse response, Resource resource, String mimeType) | |
| 474 { | |
| 475 if (mimeType!=null) | |
| 476 response.setContentType(mimeType); | |
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477 |
| 805 | 478 long length=resource.length(); |
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479 |
| 805 | 480 if (response instanceof Response) |
| 481 { | |
| 482 HttpFields fields = ((Response)response).getHttpFields(); | |
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483 |
| 805 | 484 if (length>0) |
| 485 fields.putLongField(HttpHeaders.CONTENT_LENGTH_BUFFER,length); | |
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486 |
| 805 | 487 if (_cacheControl!=null) |
| 488 fields.put(HttpHeaders.CACHE_CONTROL_BUFFER,_cacheControl); | |
| 489 } | |
| 490 else | |
| 491 { | |
| 492 if (length>0) | |
| 493 response.setHeader(HttpHeaders.CONTENT_LENGTH,Long.toString(length)); | |
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494 |
| 805 | 495 if (_cacheControl!=null) |
| 496 response.setHeader(HttpHeaders.CACHE_CONTROL,_cacheControl.toString()); | |
| 497 } | |
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498 |
| 805 | 499 } |
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500 } |