Mercurial Hosting > luan
annotate src/org/eclipse/jetty/server/handler/ResourceHandler.java @ 1000:32d4b569567c
simplify handle()
| author | Franklin Schmidt <fschmidt@gmail.com> |
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| date | Wed, 19 Oct 2016 04:22:51 -0600 |
| parents | 7d28be82ab75 |
| children | 6939226e0ac4 |
| 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.Buffer; |
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34 import org.eclipse.jetty.io.ByteArrayBuffer; |
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35 import org.eclipse.jetty.io.WriterOutputStream; |
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36 import org.eclipse.jetty.server.AbstractHttpConnection; |
| 822 | 37 import javax.servlet.RequestDispatcher; |
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38 import org.eclipse.jetty.server.Request; |
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39 import org.eclipse.jetty.server.Response; |
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40 import org.eclipse.jetty.util.URIUtil; |
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41 import org.slf4j.Logger; |
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42 import org.slf4j.LoggerFactory; |
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43 import org.eclipse.jetty.util.resource.FileResource; |
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44 import org.eclipse.jetty.util.resource.Resource; |
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45 |
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46 |
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47 /* ------------------------------------------------------------ */ |
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48 /** Resource Handler. |
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49 * |
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50 * This handle will serve static content and handle If-Modified-Since headers. |
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51 * No caching is done. |
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52 * Requests for resources that do not exist are let pass (Eg no 404's). |
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53 * |
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54 * |
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55 * @org.apache.xbean.XBean |
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56 */ |
| 992 | 57 public final class ResourceHandler extends HandlerWrapper |
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58 { |
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59 private static final Logger LOG = LoggerFactory.getLogger(ResourceHandler.class); |
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60 |
| 805 | 61 Resource _baseResource; |
| 62 Resource _defaultStylesheet; | |
| 63 Resource _stylesheet; | |
| 64 String[] _welcomeFiles={"index.html"}; | |
| 65 MimeTypes _mimeTypes = new MimeTypes(); | |
| 66 ByteArrayBuffer _cacheControl; | |
| 67 boolean _aliases; | |
| 68 boolean _directory; | |
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69 |
| 805 | 70 /* ------------------------------------------------------------ */ |
| 71 public ResourceHandler() | |
| 72 { | |
| 73 | |
| 74 } | |
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75 |
| 805 | 76 /* ------------------------------------------------------------ */ |
| 77 public MimeTypes getMimeTypes() | |
| 78 { | |
| 79 return _mimeTypes; | |
| 80 } | |
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81 |
| 805 | 82 /* ------------------------------------------------------------ */ |
| 83 public void setMimeTypes(MimeTypes mimeTypes) | |
| 84 { | |
| 85 _mimeTypes = mimeTypes; | |
| 86 } | |
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87 |
| 805 | 88 /* ------------------------------------------------------------ */ |
| 89 /** | |
| 90 * @return True if resource aliases are allowed. | |
| 91 */ | |
| 92 public boolean isAliases() | |
| 93 { | |
| 94 return _aliases; | |
| 95 } | |
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96 |
| 805 | 97 /* ------------------------------------------------------------ */ |
| 98 /** | |
| 99 * Set if resource aliases (eg symlink, 8.3 names, case insensitivity) are allowed. | |
| 100 * Allowing aliases can significantly increase security vulnerabilities. | |
| 101 * If this handler is deployed inside a ContextHandler, then the | |
| 102 * {@link ContextHandler#isAliases()} takes precedent. | |
| 103 * @param aliases True if aliases are supported. | |
| 104 */ | |
| 105 public void setAliases(boolean aliases) | |
| 106 { | |
| 107 _aliases = aliases; | |
| 108 } | |
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109 |
| 805 | 110 /* ------------------------------------------------------------ */ |
| 111 /** Get the directory option. | |
| 112 * @return true if directories are listed. | |
| 113 */ | |
| 114 public boolean isDirectoriesListed() | |
| 115 { | |
| 116 return _directory; | |
| 117 } | |
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118 |
| 805 | 119 /* ------------------------------------------------------------ */ |
| 120 /** Set the directory. | |
| 121 * @param directory true if directories are listed. | |
| 122 */ | |
| 123 public void setDirectoriesListed(boolean directory) | |
| 124 { | |
| 125 _directory = directory; | |
| 126 } | |
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127 |
| 805 | 128 /* ------------------------------------------------------------ */ |
| 129 @Override | |
| 130 public void doStart() | |
| 131 throws Exception | |
| 132 { | |
| 133 if (!_aliases && !FileResource.getCheckAliases()) | |
| 134 throw new IllegalStateException("Alias checking disabled"); | |
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135 |
| 805 | 136 super.doStart(); |
| 137 } | |
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138 |
| 805 | 139 /* ------------------------------------------------------------ */ |
| 140 /** | |
| 141 * @return Returns the resourceBase. | |
| 142 */ | |
| 143 public Resource getBaseResource() | |
| 144 { | |
| 145 if (_baseResource==null) | |
| 146 return null; | |
| 147 return _baseResource; | |
| 148 } | |
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149 |
| 805 | 150 /* ------------------------------------------------------------ */ |
| 151 /** | |
| 152 * @return Returns the base resource as a string. | |
| 153 */ | |
| 154 public String getResourceBase() | |
| 155 { | |
| 156 if (_baseResource==null) | |
| 157 return null; | |
| 158 return _baseResource.toString(); | |
| 159 } | |
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160 |
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161 |
| 805 | 162 /* ------------------------------------------------------------ */ |
| 163 /** | |
| 164 * @param base The resourceBase to set. | |
| 165 */ | |
| 166 public void setBaseResource(Resource base) | |
| 167 { | |
| 168 _baseResource=base; | |
| 169 } | |
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170 |
| 805 | 171 /* ------------------------------------------------------------ */ |
| 172 /** | |
| 173 * @param resourceBase The base resource as a string. | |
| 174 */ | |
| 175 public void setResourceBase(String resourceBase) | |
| 176 { | |
| 177 try | |
| 178 { | |
| 179 setBaseResource(Resource.newResource(resourceBase)); | |
| 180 } | |
| 181 catch (Exception e) | |
| 182 { | |
| 183 LOG.warn(e.toString()); | |
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184 LOG.debug("",e); |
| 805 | 185 throw new IllegalArgumentException(resourceBase); |
| 186 } | |
| 187 } | |
| 188 | |
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189 private Resource getStylesheet() |
| 805 | 190 { |
| 191 if(_stylesheet != null) | |
| 192 { | |
| 193 return _stylesheet; | |
| 194 } | |
| 195 else | |
| 196 { | |
| 197 if(_defaultStylesheet == null) | |
| 198 { | |
| 199 try | |
| 200 { | |
| 201 _defaultStylesheet = Resource.newResource(this.getClass().getResource("/org/eclipse/jetty/jetty-dir.css")); | |
| 202 } | |
| 203 catch(IOException e) | |
| 204 { | |
| 205 LOG.warn(e.toString()); | |
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206 LOG.debug("",e); |
| 805 | 207 } |
| 208 } | |
| 209 return _defaultStylesheet; | |
| 210 } | |
| 211 } | |
| 212 | |
| 213 /* ------------------------------------------------------------ */ | |
| 214 /** | |
| 215 * @param stylesheet The location of the stylesheet to be used as a String. | |
| 216 */ | |
| 217 public void setStylesheet(String stylesheet) | |
| 218 { | |
| 219 try | |
| 220 { | |
| 221 _stylesheet = Resource.newResource(stylesheet); | |
| 222 if(!_stylesheet.exists()) | |
| 223 { | |
| 224 LOG.warn("unable to find custom stylesheet: " + stylesheet); | |
| 225 _stylesheet = null; | |
| 226 } | |
| 227 } | |
| 228 catch(Exception e) | |
| 229 { | |
| 230 LOG.warn(e.toString()); | |
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231 LOG.debug("",e); |
| 805 | 232 throw new IllegalArgumentException(stylesheet.toString()); |
| 233 } | |
| 234 } | |
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235 |
| 805 | 236 /* ------------------------------------------------------------ */ |
| 237 /** | |
| 238 * @return the cacheControl header to set on all static content. | |
| 239 */ | |
| 240 public String getCacheControl() | |
| 241 { | |
| 242 return _cacheControl.toString(); | |
| 243 } | |
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244 |
| 805 | 245 /* ------------------------------------------------------------ */ |
| 246 /** | |
| 247 * @param cacheControl the cacheControl header to set on all static content. | |
| 248 */ | |
| 249 public void setCacheControl(String cacheControl) | |
| 250 { | |
| 251 _cacheControl=cacheControl==null?null:new ByteArrayBuffer(cacheControl); | |
| 252 } | |
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253 |
| 997 | 254 private Resource getResource(Request request) throws MalformedURLException |
| 805 | 255 { |
| 997 | 256 String path = request.getPathInfo(); |
| 805 | 257 if (path==null || !path.startsWith("/")) |
| 258 throw new MalformedURLException(path); | |
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259 |
| 805 | 260 Resource base = _baseResource; |
| 261 if (base==null) | |
| 262 { | |
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263 ContextHandler ch = request._contextHandler; |
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264 if (ch==null) |
| 805 | 265 return null; |
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266 base = ch.getBaseResource(); |
| 805 | 267 if (base==null) |
| 268 return null; | |
| 269 } | |
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270 |
| 805 | 271 try |
| 272 { | |
| 992 | 273 path = URIUtil.canonicalPath(path); |
| 805 | 274 return base.addPath(path); |
| 275 } | |
| 276 catch(Exception e) | |
| 277 { | |
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278 LOG.trace("",e); |
| 805 | 279 } |
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280 |
| 805 | 281 return null; |
| 282 } | |
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283 |
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284 |
| 805 | 285 /* ------------------------------------------------------------ */ |
| 286 public String[] getWelcomeFiles() | |
| 287 { | |
| 288 return _welcomeFiles; | |
| 289 } | |
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290 |
| 805 | 291 /* ------------------------------------------------------------ */ |
| 292 public void setWelcomeFiles(String[] welcomeFiles) | |
| 293 { | |
| 294 _welcomeFiles=welcomeFiles; | |
| 295 } | |
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296 |
| 805 | 297 /* ------------------------------------------------------------ */ |
| 298 protected Resource getWelcome(Resource directory) throws MalformedURLException, IOException | |
| 299 { | |
| 300 for (int i=0;i<_welcomeFiles.length;i++) | |
| 301 { | |
| 302 Resource welcome=directory.addPath(_welcomeFiles[i]); | |
| 303 if (welcome.exists() && !welcome.isDirectory()) | |
| 304 return welcome; | |
| 305 } | |
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306 |
| 805 | 307 return null; |
| 308 } | |
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309 |
| 1000 | 310 @Override |
| 311 public void handle(String target, Request request, HttpServletResponse response) throws IOException, ServletException | |
| 805 | 312 { |
| 1000 | 313 if (request.isHandled()) |
| 805 | 314 return; |
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315 |
| 805 | 316 boolean skipContentBody = false; |
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317 |
| 805 | 318 if(!HttpMethods.GET.equals(request.getMethod())) |
| 319 { | |
| 320 if(!HttpMethods.HEAD.equals(request.getMethod())) | |
| 321 { | |
| 322 //try another handler | |
| 1000 | 323 super.handle(target, request, response); |
| 805 | 324 return; |
| 325 } | |
| 326 skipContentBody = true; | |
| 327 } | |
| 328 | |
| 1000 | 329 Resource resource = getResource(request); |
| 805 | 330 |
| 331 if (resource==null || !resource.exists()) | |
| 332 { | |
| 333 if (target.endsWith("/jetty-dir.css")) | |
| 334 { | |
| 335 resource = getStylesheet(); | |
| 336 if (resource==null) | |
| 337 return; | |
| 338 response.setContentType("text/css"); | |
| 339 } | |
| 340 else | |
| 341 { | |
| 342 //no resource - try other handlers | |
| 1000 | 343 super.handle(target, request, response); |
| 805 | 344 return; |
| 345 } | |
| 346 } | |
| 347 | |
| 348 if (!_aliases && resource.getAlias()!=null) | |
| 349 { | |
| 350 LOG.info(resource+" aliased to "+resource.getAlias()); | |
| 351 return; | |
| 352 } | |
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353 |
| 805 | 354 // We are going to serve something |
| 1000 | 355 request.setHandled(true); |
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356 |
| 805 | 357 if (resource.isDirectory()) |
| 358 { | |
| 359 if (!request.getPathInfo().endsWith(URIUtil.SLASH)) | |
| 360 { | |
| 361 response.sendRedirect(response.encodeRedirectURL(URIUtil.addPaths(request.getRequestURI(),URIUtil.SLASH))); | |
| 362 return; | |
| 363 } | |
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364 |
| 805 | 365 Resource welcome=getWelcome(resource); |
| 366 if (welcome!=null && welcome.exists()) | |
| 367 resource=welcome; | |
| 368 else | |
| 369 { | |
| 370 doDirectory(request,response,resource); | |
| 1000 | 371 request.setHandled(true); |
| 805 | 372 return; |
| 373 } | |
| 374 } | |
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375 |
| 805 | 376 // set some headers |
| 377 long last_modified=resource.lastModified(); | |
| 378 if (last_modified>0) | |
| 379 { | |
| 380 long if_modified=request.getDateHeader(HttpHeaders.IF_MODIFIED_SINCE); | |
| 381 if (if_modified>0 && last_modified/1000<=if_modified/1000) | |
| 382 { | |
| 383 response.setStatus(HttpStatus.NOT_MODIFIED_304); | |
| 384 return; | |
| 385 } | |
| 386 } | |
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387 |
| 805 | 388 Buffer mime=_mimeTypes.getMimeByExtension(resource.toString()); |
| 389 if (mime==null) | |
| 390 mime=_mimeTypes.getMimeByExtension(request.getPathInfo()); | |
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391 |
| 805 | 392 // set the headers |
| 393 doResponseHeaders(response,resource,mime!=null?mime.toString():null); | |
| 394 response.setDateHeader(HttpHeaders.LAST_MODIFIED,last_modified); | |
| 395 | |
| 396 if(skipContentBody) | |
| 397 return; | |
| 398 // Send the content | |
| 399 OutputStream out =null; | |
| 400 try {out = response.getOutputStream();} | |
| 401 catch(IllegalStateException e) {out = new WriterOutputStream(response.getWriter());} | |
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402 |
| 805 | 403 // See if a short direct method can be used? |
| 404 if (out instanceof AbstractHttpConnection.Output) | |
| 405 { | |
| 406 // TODO file mapped buffers | |
| 407 ((AbstractHttpConnection.Output)out).sendContent(resource.getInputStream()); | |
| 408 } | |
| 409 else | |
| 410 { | |
| 411 // Write content normally | |
| 412 resource.writeTo(out,0,resource.length()); | |
| 413 } | |
| 414 } | |
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415 |
| 805 | 416 /* ------------------------------------------------------------ */ |
| 1000 | 417 protected void doDirectory(Request request,HttpServletResponse response, Resource resource) |
| 805 | 418 throws IOException |
| 419 { | |
| 420 if (_directory) | |
| 421 { | |
| 422 String listing = resource.getListHTML(request.getRequestURI(),request.getPathInfo().lastIndexOf("/") > 0); | |
| 423 response.setContentType("text/html; charset=UTF-8"); | |
| 424 response.getWriter().println(listing); | |
| 425 } | |
| 426 else | |
| 427 response.sendError(HttpStatus.FORBIDDEN_403); | |
| 428 } | |
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429 |
| 805 | 430 /* ------------------------------------------------------------ */ |
| 431 /** Set the response headers. | |
| 432 * This method is called to set the response headers such as content type and content length. | |
| 433 * May be extended to add additional headers. | |
| 434 * @param response | |
| 435 * @param resource | |
| 436 * @param mimeType | |
| 437 */ | |
| 438 protected void doResponseHeaders(HttpServletResponse response, Resource resource, String mimeType) | |
| 439 { | |
| 440 if (mimeType!=null) | |
| 441 response.setContentType(mimeType); | |
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442 |
| 805 | 443 long length=resource.length(); |
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444 |
| 805 | 445 if (response instanceof Response) |
| 446 { | |
| 447 HttpFields fields = ((Response)response).getHttpFields(); | |
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448 |
| 805 | 449 if (length>0) |
| 450 fields.putLongField(HttpHeaders.CONTENT_LENGTH_BUFFER,length); | |
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451 |
| 805 | 452 if (_cacheControl!=null) |
| 453 fields.put(HttpHeaders.CACHE_CONTROL_BUFFER,_cacheControl); | |
| 454 } | |
| 455 else | |
| 456 { | |
| 457 if (length>0) | |
| 458 response.setHeader(HttpHeaders.CONTENT_LENGTH,Long.toString(length)); | |
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459 |
| 805 | 460 if (_cacheControl!=null) |
| 461 response.setHeader(HttpHeaders.CACHE_CONTROL,_cacheControl.toString()); | |
| 462 } | |
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463 |
| 805 | 464 } |
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parents:
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465 } |