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annotate src/org/eclipse/jetty/server/handler/ResourceHandler.java @ 997:7d28be82ab75
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| author | Franklin Schmidt <fschmidt@gmail.com> |
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| date | Tue, 18 Oct 2016 22:43:17 -0600 |
| parents | 4e9d373bf6e9 |
| children | 32d4b569567c |
| 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 Resource _baseResource; |
| 63 Resource _defaultStylesheet; | |
| 64 Resource _stylesheet; | |
| 65 String[] _welcomeFiles={"index.html"}; | |
| 66 MimeTypes _mimeTypes = new MimeTypes(); | |
| 67 ByteArrayBuffer _cacheControl; | |
| 68 boolean _aliases; | |
| 69 boolean _directory; | |
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70 |
| 805 | 71 /* ------------------------------------------------------------ */ |
| 72 public ResourceHandler() | |
| 73 { | |
| 74 | |
| 75 } | |
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76 |
| 805 | 77 /* ------------------------------------------------------------ */ |
| 78 public MimeTypes getMimeTypes() | |
| 79 { | |
| 80 return _mimeTypes; | |
| 81 } | |
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82 |
| 805 | 83 /* ------------------------------------------------------------ */ |
| 84 public void setMimeTypes(MimeTypes mimeTypes) | |
| 85 { | |
| 86 _mimeTypes = mimeTypes; | |
| 87 } | |
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88 |
| 805 | 89 /* ------------------------------------------------------------ */ |
| 90 /** | |
| 91 * @return True if resource aliases are allowed. | |
| 92 */ | |
| 93 public boolean isAliases() | |
| 94 { | |
| 95 return _aliases; | |
| 96 } | |
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97 |
| 805 | 98 /* ------------------------------------------------------------ */ |
| 99 /** | |
| 100 * Set if resource aliases (eg symlink, 8.3 names, case insensitivity) are allowed. | |
| 101 * Allowing aliases can significantly increase security vulnerabilities. | |
| 102 * If this handler is deployed inside a ContextHandler, then the | |
| 103 * {@link ContextHandler#isAliases()} takes precedent. | |
| 104 * @param aliases True if aliases are supported. | |
| 105 */ | |
| 106 public void setAliases(boolean aliases) | |
| 107 { | |
| 108 _aliases = aliases; | |
| 109 } | |
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110 |
| 805 | 111 /* ------------------------------------------------------------ */ |
| 112 /** Get the directory option. | |
| 113 * @return true if directories are listed. | |
| 114 */ | |
| 115 public boolean isDirectoriesListed() | |
| 116 { | |
| 117 return _directory; | |
| 118 } | |
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119 |
| 805 | 120 /* ------------------------------------------------------------ */ |
| 121 /** Set the directory. | |
| 122 * @param directory true if directories are listed. | |
| 123 */ | |
| 124 public void setDirectoriesListed(boolean directory) | |
| 125 { | |
| 126 _directory = directory; | |
| 127 } | |
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128 |
| 805 | 129 /* ------------------------------------------------------------ */ |
| 130 @Override | |
| 131 public void doStart() | |
| 132 throws Exception | |
| 133 { | |
| 134 if (!_aliases && !FileResource.getCheckAliases()) | |
| 135 throw new IllegalStateException("Alias checking disabled"); | |
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136 |
| 805 | 137 super.doStart(); |
| 138 } | |
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139 |
| 805 | 140 /* ------------------------------------------------------------ */ |
| 141 /** | |
| 142 * @return Returns the resourceBase. | |
| 143 */ | |
| 144 public Resource getBaseResource() | |
| 145 { | |
| 146 if (_baseResource==null) | |
| 147 return null; | |
| 148 return _baseResource; | |
| 149 } | |
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150 |
| 805 | 151 /* ------------------------------------------------------------ */ |
| 152 /** | |
| 153 * @return Returns the base resource as a string. | |
| 154 */ | |
| 155 public String getResourceBase() | |
| 156 { | |
| 157 if (_baseResource==null) | |
| 158 return null; | |
| 159 return _baseResource.toString(); | |
| 160 } | |
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161 |
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162 |
| 805 | 163 /* ------------------------------------------------------------ */ |
| 164 /** | |
| 165 * @param base The resourceBase to set. | |
| 166 */ | |
| 167 public void setBaseResource(Resource base) | |
| 168 { | |
| 169 _baseResource=base; | |
| 170 } | |
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171 |
| 805 | 172 /* ------------------------------------------------------------ */ |
| 173 /** | |
| 174 * @param resourceBase The base resource as a string. | |
| 175 */ | |
| 176 public void setResourceBase(String resourceBase) | |
| 177 { | |
| 178 try | |
| 179 { | |
| 180 setBaseResource(Resource.newResource(resourceBase)); | |
| 181 } | |
| 182 catch (Exception e) | |
| 183 { | |
| 184 LOG.warn(e.toString()); | |
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185 LOG.debug("",e); |
| 805 | 186 throw new IllegalArgumentException(resourceBase); |
| 187 } | |
| 188 } | |
| 189 | |
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190 private Resource getStylesheet() |
| 805 | 191 { |
| 192 if(_stylesheet != null) | |
| 193 { | |
| 194 return _stylesheet; | |
| 195 } | |
| 196 else | |
| 197 { | |
| 198 if(_defaultStylesheet == null) | |
| 199 { | |
| 200 try | |
| 201 { | |
| 202 _defaultStylesheet = Resource.newResource(this.getClass().getResource("/org/eclipse/jetty/jetty-dir.css")); | |
| 203 } | |
| 204 catch(IOException e) | |
| 205 { | |
| 206 LOG.warn(e.toString()); | |
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207 LOG.debug("",e); |
| 805 | 208 } |
| 209 } | |
| 210 return _defaultStylesheet; | |
| 211 } | |
| 212 } | |
| 213 | |
| 214 /* ------------------------------------------------------------ */ | |
| 215 /** | |
| 216 * @param stylesheet The location of the stylesheet to be used as a String. | |
| 217 */ | |
| 218 public void setStylesheet(String stylesheet) | |
| 219 { | |
| 220 try | |
| 221 { | |
| 222 _stylesheet = Resource.newResource(stylesheet); | |
| 223 if(!_stylesheet.exists()) | |
| 224 { | |
| 225 LOG.warn("unable to find custom stylesheet: " + stylesheet); | |
| 226 _stylesheet = null; | |
| 227 } | |
| 228 } | |
| 229 catch(Exception e) | |
| 230 { | |
| 231 LOG.warn(e.toString()); | |
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232 LOG.debug("",e); |
| 805 | 233 throw new IllegalArgumentException(stylesheet.toString()); |
| 234 } | |
| 235 } | |
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236 |
| 805 | 237 /* ------------------------------------------------------------ */ |
| 238 /** | |
| 239 * @return the cacheControl header to set on all static content. | |
| 240 */ | |
| 241 public String getCacheControl() | |
| 242 { | |
| 243 return _cacheControl.toString(); | |
| 244 } | |
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245 |
| 805 | 246 /* ------------------------------------------------------------ */ |
| 247 /** | |
| 248 * @param cacheControl the cacheControl header to set on all static content. | |
| 249 */ | |
| 250 public void setCacheControl(String cacheControl) | |
| 251 { | |
| 252 _cacheControl=cacheControl==null?null:new ByteArrayBuffer(cacheControl); | |
| 253 } | |
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254 |
| 997 | 255 private Resource getResource(Request request) throws MalformedURLException |
| 805 | 256 { |
| 997 | 257 String path = request.getPathInfo(); |
| 805 | 258 if (path==null || !path.startsWith("/")) |
| 259 throw new MalformedURLException(path); | |
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260 |
| 805 | 261 Resource base = _baseResource; |
| 262 if (base==null) | |
| 263 { | |
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264 ContextHandler ch = request._contextHandler; |
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265 if (ch==null) |
| 805 | 266 return null; |
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267 base = ch.getBaseResource(); |
| 805 | 268 if (base==null) |
| 269 return null; | |
| 270 } | |
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271 |
| 805 | 272 try |
| 273 { | |
| 992 | 274 path = URIUtil.canonicalPath(path); |
| 805 | 275 return base.addPath(path); |
| 276 } | |
| 277 catch(Exception e) | |
| 278 { | |
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279 LOG.trace("",e); |
| 805 | 280 } |
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281 |
| 805 | 282 return null; |
| 283 } | |
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284 |
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285 |
| 805 | 286 /* ------------------------------------------------------------ */ |
| 287 public String[] getWelcomeFiles() | |
| 288 { | |
| 289 return _welcomeFiles; | |
| 290 } | |
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291 |
| 805 | 292 /* ------------------------------------------------------------ */ |
| 293 public void setWelcomeFiles(String[] welcomeFiles) | |
| 294 { | |
| 295 _welcomeFiles=welcomeFiles; | |
| 296 } | |
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297 |
| 805 | 298 /* ------------------------------------------------------------ */ |
| 299 protected Resource getWelcome(Resource directory) throws MalformedURLException, IOException | |
| 300 { | |
| 301 for (int i=0;i<_welcomeFiles.length;i++) | |
| 302 { | |
| 303 Resource welcome=directory.addPath(_welcomeFiles[i]); | |
| 304 if (welcome.exists() && !welcome.isDirectory()) | |
| 305 return welcome; | |
| 306 } | |
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307 |
| 805 | 308 return null; |
| 309 } | |
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310 |
| 805 | 311 /* ------------------------------------------------------------ */ |
| 312 /* | |
| 313 * @see org.eclipse.jetty.server.Handler#handle(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, int) | |
| 314 */ | |
| 315 public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException | |
| 316 { | |
| 317 if (baseRequest.isHandled()) | |
| 318 return; | |
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319 |
| 805 | 320 boolean skipContentBody = false; |
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321 |
| 805 | 322 if(!HttpMethods.GET.equals(request.getMethod())) |
| 323 { | |
| 324 if(!HttpMethods.HEAD.equals(request.getMethod())) | |
| 325 { | |
| 326 //try another handler | |
| 327 super.handle(target, baseRequest, request, response); | |
| 328 return; | |
| 329 } | |
| 330 skipContentBody = true; | |
| 331 } | |
| 332 | |
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333 Resource resource = getResource(baseRequest); |
| 805 | 334 |
| 335 if (resource==null || !resource.exists()) | |
| 336 { | |
| 337 if (target.endsWith("/jetty-dir.css")) | |
| 338 { | |
| 339 resource = getStylesheet(); | |
| 340 if (resource==null) | |
| 341 return; | |
| 342 response.setContentType("text/css"); | |
| 343 } | |
| 344 else | |
| 345 { | |
| 346 //no resource - try other handlers | |
| 347 super.handle(target, baseRequest, request, response); | |
| 348 return; | |
| 349 } | |
| 350 } | |
| 351 | |
| 352 if (!_aliases && resource.getAlias()!=null) | |
| 353 { | |
| 354 LOG.info(resource+" aliased to "+resource.getAlias()); | |
| 355 return; | |
| 356 } | |
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357 |
| 805 | 358 // We are going to serve something |
| 359 baseRequest.setHandled(true); | |
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360 |
| 805 | 361 if (resource.isDirectory()) |
| 362 { | |
| 363 if (!request.getPathInfo().endsWith(URIUtil.SLASH)) | |
| 364 { | |
| 365 response.sendRedirect(response.encodeRedirectURL(URIUtil.addPaths(request.getRequestURI(),URIUtil.SLASH))); | |
| 366 return; | |
| 367 } | |
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368 |
| 805 | 369 Resource welcome=getWelcome(resource); |
| 370 if (welcome!=null && welcome.exists()) | |
| 371 resource=welcome; | |
| 372 else | |
| 373 { | |
| 374 doDirectory(request,response,resource); | |
| 375 baseRequest.setHandled(true); | |
| 376 return; | |
| 377 } | |
| 378 } | |
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379 |
| 805 | 380 // set some headers |
| 381 long last_modified=resource.lastModified(); | |
| 382 if (last_modified>0) | |
| 383 { | |
| 384 long if_modified=request.getDateHeader(HttpHeaders.IF_MODIFIED_SINCE); | |
| 385 if (if_modified>0 && last_modified/1000<=if_modified/1000) | |
| 386 { | |
| 387 response.setStatus(HttpStatus.NOT_MODIFIED_304); | |
| 388 return; | |
| 389 } | |
| 390 } | |
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391 |
| 805 | 392 Buffer mime=_mimeTypes.getMimeByExtension(resource.toString()); |
| 393 if (mime==null) | |
| 394 mime=_mimeTypes.getMimeByExtension(request.getPathInfo()); | |
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395 |
| 805 | 396 // set the headers |
| 397 doResponseHeaders(response,resource,mime!=null?mime.toString():null); | |
| 398 response.setDateHeader(HttpHeaders.LAST_MODIFIED,last_modified); | |
| 399 | |
| 400 if(skipContentBody) | |
| 401 return; | |
| 402 // Send the content | |
| 403 OutputStream out =null; | |
| 404 try {out = response.getOutputStream();} | |
| 405 catch(IllegalStateException e) {out = new WriterOutputStream(response.getWriter());} | |
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406 |
| 805 | 407 // See if a short direct method can be used? |
| 408 if (out instanceof AbstractHttpConnection.Output) | |
| 409 { | |
| 410 // TODO file mapped buffers | |
| 411 ((AbstractHttpConnection.Output)out).sendContent(resource.getInputStream()); | |
| 412 } | |
| 413 else | |
| 414 { | |
| 415 // Write content normally | |
| 416 resource.writeTo(out,0,resource.length()); | |
| 417 } | |
| 418 } | |
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419 |
| 805 | 420 /* ------------------------------------------------------------ */ |
| 421 protected void doDirectory(HttpServletRequest request,HttpServletResponse response, Resource resource) | |
| 422 throws IOException | |
| 423 { | |
| 424 if (_directory) | |
| 425 { | |
| 426 String listing = resource.getListHTML(request.getRequestURI(),request.getPathInfo().lastIndexOf("/") > 0); | |
| 427 response.setContentType("text/html; charset=UTF-8"); | |
| 428 response.getWriter().println(listing); | |
| 429 } | |
| 430 else | |
| 431 response.sendError(HttpStatus.FORBIDDEN_403); | |
| 432 } | |
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433 |
| 805 | 434 /* ------------------------------------------------------------ */ |
| 435 /** Set the response headers. | |
| 436 * This method is called to set the response headers such as content type and content length. | |
| 437 * May be extended to add additional headers. | |
| 438 * @param response | |
| 439 * @param resource | |
| 440 * @param mimeType | |
| 441 */ | |
| 442 protected void doResponseHeaders(HttpServletResponse response, Resource resource, String mimeType) | |
| 443 { | |
| 444 if (mimeType!=null) | |
| 445 response.setContentType(mimeType); | |
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446 |
| 805 | 447 long length=resource.length(); |
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448 |
| 805 | 449 if (response instanceof Response) |
| 450 { | |
| 451 HttpFields fields = ((Response)response).getHttpFields(); | |
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452 |
| 805 | 453 if (length>0) |
| 454 fields.putLongField(HttpHeaders.CONTENT_LENGTH_BUFFER,length); | |
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455 |
| 805 | 456 if (_cacheControl!=null) |
| 457 fields.put(HttpHeaders.CACHE_CONTROL_BUFFER,_cacheControl); | |
| 458 } | |
| 459 else | |
| 460 { | |
| 461 if (length>0) | |
| 462 response.setHeader(HttpHeaders.CONTENT_LENGTH,Long.toString(length)); | |
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463 |
| 805 | 464 if (_cacheControl!=null) |
| 465 response.setHeader(HttpHeaders.CACHE_CONTROL,_cacheControl.toString()); | |
| 466 } | |
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467 |
| 805 | 468 } |
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469 } |