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annotate src/org/eclipse/jetty/server/handler/ResourceHandler.java @ 1044:dd71a59fcf72
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| author | Franklin Schmidt <fschmidt@gmail.com> |
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| date | Fri, 04 Nov 2016 02:26:54 -0600 |
| parents | 921c25a05eaa |
| children |
| 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.HttpServletResponse; |
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27 |
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28 import org.eclipse.jetty.http.HttpFields; |
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29 import org.eclipse.jetty.http.HttpHeaders; |
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30 import org.eclipse.jetty.http.HttpMethods; |
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31 import org.eclipse.jetty.http.HttpStatus; |
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32 import org.eclipse.jetty.http.MimeTypes; |
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33 import org.eclipse.jetty.io.WriterOutputStream; |
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34 import org.eclipse.jetty.server.AbstractHttpConnection; |
| 822 | 35 import javax.servlet.RequestDispatcher; |
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36 import org.eclipse.jetty.server.Request; |
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37 import org.eclipse.jetty.server.Response; |
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38 import org.eclipse.jetty.util.URIUtil; |
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39 import org.slf4j.Logger; |
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40 import org.slf4j.LoggerFactory; |
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41 import org.eclipse.jetty.util.resource.FileResource; |
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42 import org.eclipse.jetty.util.resource.Resource; |
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43 |
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44 |
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45 /* ------------------------------------------------------------ */ |
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46 /** Resource Handler. |
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47 * |
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48 * This handle will serve static content and handle If-Modified-Since headers. |
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49 * No caching is done. |
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50 * Requests for resources that do not exist are let pass (Eg no 404's). |
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51 * |
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52 * |
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53 * @org.apache.xbean.XBean |
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54 */ |
| 992 | 55 public final class ResourceHandler extends HandlerWrapper |
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56 { |
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57 private static final Logger LOG = LoggerFactory.getLogger(ResourceHandler.class); |
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58 |
| 805 | 59 Resource _baseResource; |
| 60 Resource _defaultStylesheet; | |
| 61 Resource _stylesheet; | |
| 62 String[] _welcomeFiles={"index.html"}; | |
| 63 MimeTypes _mimeTypes = new MimeTypes(); | |
| 64 boolean _aliases; | |
| 65 boolean _directory; | |
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66 |
| 805 | 67 /* ------------------------------------------------------------ */ |
| 68 public ResourceHandler() | |
| 69 { | |
| 70 | |
| 71 } | |
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72 |
| 805 | 73 /* ------------------------------------------------------------ */ |
| 74 public MimeTypes getMimeTypes() | |
| 75 { | |
| 76 return _mimeTypes; | |
| 77 } | |
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78 |
| 805 | 79 /* ------------------------------------------------------------ */ |
| 80 public void setMimeTypes(MimeTypes mimeTypes) | |
| 81 { | |
| 82 _mimeTypes = mimeTypes; | |
| 83 } | |
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84 |
| 805 | 85 /* ------------------------------------------------------------ */ |
| 86 /** | |
| 87 * @return True if resource aliases are allowed. | |
| 88 */ | |
| 89 public boolean isAliases() | |
| 90 { | |
| 91 return _aliases; | |
| 92 } | |
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93 |
| 805 | 94 /* ------------------------------------------------------------ */ |
| 95 /** | |
| 96 * Set if resource aliases (eg symlink, 8.3 names, case insensitivity) are allowed. | |
| 97 * Allowing aliases can significantly increase security vulnerabilities. | |
| 98 * If this handler is deployed inside a ContextHandler, then the | |
| 99 * {@link ContextHandler#isAliases()} takes precedent. | |
| 100 * @param aliases True if aliases are supported. | |
| 101 */ | |
| 102 public void setAliases(boolean aliases) | |
| 103 { | |
| 104 _aliases = aliases; | |
| 105 } | |
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106 |
| 805 | 107 /* ------------------------------------------------------------ */ |
| 108 /** Get the directory option. | |
| 109 * @return true if directories are listed. | |
| 110 */ | |
| 111 public boolean isDirectoriesListed() | |
| 112 { | |
| 113 return _directory; | |
| 114 } | |
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115 |
| 805 | 116 /* ------------------------------------------------------------ */ |
| 117 /** Set the directory. | |
| 118 * @param directory true if directories are listed. | |
| 119 */ | |
| 120 public void setDirectoriesListed(boolean directory) | |
| 121 { | |
| 122 _directory = directory; | |
| 123 } | |
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124 |
| 805 | 125 /* ------------------------------------------------------------ */ |
| 126 @Override | |
| 127 public void doStart() | |
| 128 throws Exception | |
| 129 { | |
| 130 if (!_aliases && !FileResource.getCheckAliases()) | |
| 131 throw new IllegalStateException("Alias checking disabled"); | |
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132 |
| 805 | 133 super.doStart(); |
| 134 } | |
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135 |
| 805 | 136 /* ------------------------------------------------------------ */ |
| 137 /** | |
| 138 * @return Returns the resourceBase. | |
| 139 */ | |
| 140 public Resource getBaseResource() | |
| 141 { | |
| 142 if (_baseResource==null) | |
| 143 return null; | |
| 144 return _baseResource; | |
| 145 } | |
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146 |
| 805 | 147 /* ------------------------------------------------------------ */ |
| 148 /** | |
| 149 * @return Returns the base resource as a string. | |
| 150 */ | |
| 151 public String getResourceBase() | |
| 152 { | |
| 153 if (_baseResource==null) | |
| 154 return null; | |
| 155 return _baseResource.toString(); | |
| 156 } | |
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157 |
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158 |
| 805 | 159 /* ------------------------------------------------------------ */ |
| 160 /** | |
| 161 * @param base The resourceBase to set. | |
| 162 */ | |
| 163 public void setBaseResource(Resource base) | |
| 164 { | |
| 165 _baseResource=base; | |
| 166 } | |
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167 |
| 805 | 168 /* ------------------------------------------------------------ */ |
| 169 /** | |
| 170 * @param resourceBase The base resource as a string. | |
| 171 */ | |
| 172 public void setResourceBase(String resourceBase) | |
| 173 { | |
| 174 try | |
| 175 { | |
| 176 setBaseResource(Resource.newResource(resourceBase)); | |
| 177 } | |
| 178 catch (Exception e) | |
| 179 { | |
| 180 LOG.warn(e.toString()); | |
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181 LOG.debug("",e); |
| 805 | 182 throw new IllegalArgumentException(resourceBase); |
| 183 } | |
| 184 } | |
| 185 | |
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186 private Resource getStylesheet() |
| 805 | 187 { |
| 188 if(_stylesheet != null) | |
| 189 { | |
| 190 return _stylesheet; | |
| 191 } | |
| 192 else | |
| 193 { | |
| 194 if(_defaultStylesheet == null) | |
| 195 { | |
| 196 try | |
| 197 { | |
| 198 _defaultStylesheet = Resource.newResource(this.getClass().getResource("/org/eclipse/jetty/jetty-dir.css")); | |
| 199 } | |
| 200 catch(IOException e) | |
| 201 { | |
| 202 LOG.warn(e.toString()); | |
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203 LOG.debug("",e); |
| 805 | 204 } |
| 205 } | |
| 206 return _defaultStylesheet; | |
| 207 } | |
| 208 } | |
| 209 | |
| 210 /* ------------------------------------------------------------ */ | |
| 211 /** | |
| 212 * @param stylesheet The location of the stylesheet to be used as a String. | |
| 213 */ | |
| 214 public void setStylesheet(String stylesheet) | |
| 215 { | |
| 216 try | |
| 217 { | |
| 218 _stylesheet = Resource.newResource(stylesheet); | |
| 219 if(!_stylesheet.exists()) | |
| 220 { | |
| 221 LOG.warn("unable to find custom stylesheet: " + stylesheet); | |
| 222 _stylesheet = null; | |
| 223 } | |
| 224 } | |
| 225 catch(Exception e) | |
| 226 { | |
| 227 LOG.warn(e.toString()); | |
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228 LOG.debug("",e); |
| 805 | 229 throw new IllegalArgumentException(stylesheet.toString()); |
| 230 } | |
| 231 } | |
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232 |
| 997 | 233 private Resource getResource(Request request) throws MalformedURLException |
| 805 | 234 { |
| 997 | 235 String path = request.getPathInfo(); |
| 805 | 236 if (path==null || !path.startsWith("/")) |
| 237 throw new MalformedURLException(path); | |
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238 |
| 805 | 239 Resource base = _baseResource; |
| 240 if (base==null) | |
| 241 { | |
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242 ContextHandler ch = request._contextHandler; |
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243 if (ch==null) |
| 805 | 244 return null; |
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245 base = ch.getBaseResource(); |
| 805 | 246 if (base==null) |
| 247 return null; | |
| 248 } | |
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249 |
| 805 | 250 try |
| 251 { | |
| 992 | 252 path = URIUtil.canonicalPath(path); |
| 805 | 253 return base.addPath(path); |
| 254 } | |
| 255 catch(Exception e) | |
| 256 { | |
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257 LOG.trace("",e); |
| 805 | 258 } |
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259 |
| 805 | 260 return null; |
| 261 } | |
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262 |
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263 |
| 805 | 264 /* ------------------------------------------------------------ */ |
| 265 public String[] getWelcomeFiles() | |
| 266 { | |
| 267 return _welcomeFiles; | |
| 268 } | |
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269 |
| 805 | 270 /* ------------------------------------------------------------ */ |
| 271 public void setWelcomeFiles(String[] welcomeFiles) | |
| 272 { | |
| 273 _welcomeFiles=welcomeFiles; | |
| 274 } | |
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275 |
| 805 | 276 /* ------------------------------------------------------------ */ |
| 277 protected Resource getWelcome(Resource directory) throws MalformedURLException, IOException | |
| 278 { | |
| 279 for (int i=0;i<_welcomeFiles.length;i++) | |
| 280 { | |
| 281 Resource welcome=directory.addPath(_welcomeFiles[i]); | |
| 282 if (welcome.exists() && !welcome.isDirectory()) | |
| 283 return welcome; | |
| 284 } | |
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285 |
| 805 | 286 return null; |
| 287 } | |
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288 |
| 1000 | 289 @Override |
| 290 public void handle(String target, Request request, HttpServletResponse response) throws IOException, ServletException | |
| 805 | 291 { |
| 1000 | 292 if (request.isHandled()) |
| 805 | 293 return; |
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294 |
| 805 | 295 boolean skipContentBody = false; |
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296 |
| 805 | 297 if(!HttpMethods.GET.equals(request.getMethod())) |
| 298 { | |
| 299 if(!HttpMethods.HEAD.equals(request.getMethod())) | |
| 300 { | |
| 301 //try another handler | |
| 1000 | 302 super.handle(target, request, response); |
| 805 | 303 return; |
| 304 } | |
| 305 skipContentBody = true; | |
| 306 } | |
| 307 | |
| 1000 | 308 Resource resource = getResource(request); |
| 805 | 309 |
| 310 if (resource==null || !resource.exists()) | |
| 311 { | |
| 312 if (target.endsWith("/jetty-dir.css")) | |
| 313 { | |
| 314 resource = getStylesheet(); | |
| 315 if (resource==null) | |
| 316 return; | |
| 317 response.setContentType("text/css"); | |
| 318 } | |
| 319 else | |
| 320 { | |
| 321 //no resource - try other handlers | |
| 1000 | 322 super.handle(target, request, response); |
| 805 | 323 return; |
| 324 } | |
| 325 } | |
| 326 | |
| 327 if (!_aliases && resource.getAlias()!=null) | |
| 328 { | |
| 329 LOG.info(resource+" aliased to "+resource.getAlias()); | |
| 330 return; | |
| 331 } | |
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332 |
| 805 | 333 // We are going to serve something |
| 1000 | 334 request.setHandled(true); |
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335 |
| 805 | 336 if (resource.isDirectory()) |
| 337 { | |
| 1013 | 338 if (!request.getPathInfo().endsWith("/")) |
| 805 | 339 { |
| 1013 | 340 response.sendRedirect(response.encodeRedirectURL(URIUtil.addPaths(request.getRequestURI(),"/"))); |
| 805 | 341 return; |
| 342 } | |
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343 |
| 805 | 344 Resource welcome=getWelcome(resource); |
| 345 if (welcome!=null && welcome.exists()) | |
| 346 resource=welcome; | |
| 347 else | |
| 348 { | |
| 349 doDirectory(request,response,resource); | |
| 1000 | 350 request.setHandled(true); |
| 805 | 351 return; |
| 352 } | |
| 353 } | |
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354 |
| 805 | 355 // set some headers |
| 356 long last_modified=resource.lastModified(); | |
| 357 if (last_modified>0) | |
| 358 { | |
| 359 long if_modified=request.getDateHeader(HttpHeaders.IF_MODIFIED_SINCE); | |
| 360 if (if_modified>0 && last_modified/1000<=if_modified/1000) | |
| 361 { | |
| 362 response.setStatus(HttpStatus.NOT_MODIFIED_304); | |
| 363 return; | |
| 364 } | |
| 365 } | |
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366 |
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367 String mime = _mimeTypes.getMimeByExtension(resource.toString()); |
| 805 | 368 if (mime==null) |
| 369 mime=_mimeTypes.getMimeByExtension(request.getPathInfo()); | |
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370 |
| 805 | 371 // set the headers |
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372 doResponseHeaders(response,resource,mime); |
| 805 | 373 response.setDateHeader(HttpHeaders.LAST_MODIFIED,last_modified); |
| 374 | |
| 375 if(skipContentBody) | |
| 376 return; | |
| 377 // Send the content | |
| 378 OutputStream out =null; | |
| 379 try {out = response.getOutputStream();} | |
| 380 catch(IllegalStateException e) {out = new WriterOutputStream(response.getWriter());} | |
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381 |
| 805 | 382 // See if a short direct method can be used? |
| 383 if (out instanceof AbstractHttpConnection.Output) | |
| 384 { | |
| 385 // TODO file mapped buffers | |
| 386 ((AbstractHttpConnection.Output)out).sendContent(resource.getInputStream()); | |
| 387 } | |
| 388 else | |
| 389 { | |
| 390 // Write content normally | |
| 391 resource.writeTo(out,0,resource.length()); | |
| 392 } | |
| 393 } | |
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394 |
| 805 | 395 /* ------------------------------------------------------------ */ |
| 1000 | 396 protected void doDirectory(Request request,HttpServletResponse response, Resource resource) |
| 805 | 397 throws IOException |
| 398 { | |
| 399 if (_directory) | |
| 400 { | |
| 401 String listing = resource.getListHTML(request.getRequestURI(),request.getPathInfo().lastIndexOf("/") > 0); | |
| 402 response.setContentType("text/html; charset=UTF-8"); | |
| 403 response.getWriter().println(listing); | |
| 404 } | |
| 405 else | |
| 406 response.sendError(HttpStatus.FORBIDDEN_403); | |
| 407 } | |
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408 |
| 805 | 409 /* ------------------------------------------------------------ */ |
| 410 /** Set the response headers. | |
| 411 * This method is called to set the response headers such as content type and content length. | |
| 412 * May be extended to add additional headers. | |
| 413 * @param response | |
| 414 * @param resource | |
| 415 * @param mimeType | |
| 416 */ | |
| 417 protected void doResponseHeaders(HttpServletResponse response, Resource resource, String mimeType) | |
| 418 { | |
| 419 if (mimeType!=null) | |
| 420 response.setContentType(mimeType); | |
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421 |
| 805 | 422 long length=resource.length(); |
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423 |
| 805 | 424 if (response instanceof Response) |
| 425 { | |
| 426 HttpFields fields = ((Response)response).getHttpFields(); | |
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427 |
| 805 | 428 if (length>0) |
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429 fields.putLongField(HttpHeaders.CONTENT_LENGTH,length); |
| 805 | 430 } |
| 431 else | |
| 432 { | |
| 433 if (length>0) | |
| 434 response.setHeader(HttpHeaders.CONTENT_LENGTH,Long.toString(length)); | |
| 435 } | |
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436 |
| 805 | 437 } |
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438 } |