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annotate src/org/eclipse/jetty/server/handler/ResourceHandler.java @ 889:5731a7707466
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| author | Franklin Schmidt <fschmidt@gmail.com> |
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| date | Thu, 06 Oct 2016 23:24:30 -0600 |
| parents | f89abbfb3a8f |
| children | 688c39c50ee3 |
| 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.server.handler.ContextHandler.Context; |
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42 import org.eclipse.jetty.util.URIUtil; |
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43 import org.slf4j.Logger; |
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44 import org.slf4j.LoggerFactory; |
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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 { |
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61 private static final Logger LOG = LoggerFactory.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; | |
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72 |
| 805 | 73 /* ------------------------------------------------------------ */ |
| 74 public ResourceHandler() | |
| 75 { | |
| 76 | |
| 77 } | |
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78 |
| 805 | 79 /* ------------------------------------------------------------ */ |
| 80 public MimeTypes getMimeTypes() | |
| 81 { | |
| 82 return _mimeTypes; | |
| 83 } | |
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84 |
| 805 | 85 /* ------------------------------------------------------------ */ |
| 86 public void setMimeTypes(MimeTypes mimeTypes) | |
| 87 { | |
| 88 _mimeTypes = mimeTypes; | |
| 89 } | |
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90 |
| 805 | 91 /* ------------------------------------------------------------ */ |
| 92 /** | |
| 93 * @return True if resource aliases are allowed. | |
| 94 */ | |
| 95 public boolean isAliases() | |
| 96 { | |
| 97 return _aliases; | |
| 98 } | |
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99 |
| 805 | 100 /* ------------------------------------------------------------ */ |
| 101 /** | |
| 102 * Set if resource aliases (eg symlink, 8.3 names, case insensitivity) are allowed. | |
| 103 * Allowing aliases can significantly increase security vulnerabilities. | |
| 104 * If this handler is deployed inside a ContextHandler, then the | |
| 105 * {@link ContextHandler#isAliases()} takes precedent. | |
| 106 * @param aliases True if aliases are supported. | |
| 107 */ | |
| 108 public void setAliases(boolean aliases) | |
| 109 { | |
| 110 _aliases = aliases; | |
| 111 } | |
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112 |
| 805 | 113 /* ------------------------------------------------------------ */ |
| 114 /** Get the directory option. | |
| 115 * @return true if directories are listed. | |
| 116 */ | |
| 117 public boolean isDirectoriesListed() | |
| 118 { | |
| 119 return _directory; | |
| 120 } | |
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121 |
| 805 | 122 /* ------------------------------------------------------------ */ |
| 123 /** Set the directory. | |
| 124 * @param directory true if directories are listed. | |
| 125 */ | |
| 126 public void setDirectoriesListed(boolean directory) | |
| 127 { | |
| 128 _directory = directory; | |
| 129 } | |
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130 |
| 805 | 131 /* ------------------------------------------------------------ */ |
| 132 @Override | |
| 133 public void doStart() | |
| 134 throws Exception | |
| 135 { | |
| 136 Context scontext = ContextHandler.getCurrentContext(); | |
| 137 _context = (scontext==null?null:scontext.getContextHandler()); | |
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138 |
| 805 | 139 if (_context!=null) |
| 140 _aliases=_context.isAliases(); | |
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141 |
| 805 | 142 if (!_aliases && !FileResource.getCheckAliases()) |
| 143 throw new IllegalStateException("Alias checking disabled"); | |
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144 |
| 805 | 145 super.doStart(); |
| 146 } | |
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147 |
| 805 | 148 /* ------------------------------------------------------------ */ |
| 149 /** | |
| 150 * @return Returns the resourceBase. | |
| 151 */ | |
| 152 public Resource getBaseResource() | |
| 153 { | |
| 154 if (_baseResource==null) | |
| 155 return null; | |
| 156 return _baseResource; | |
| 157 } | |
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158 |
| 805 | 159 /* ------------------------------------------------------------ */ |
| 160 /** | |
| 161 * @return Returns the base resource as a string. | |
| 162 */ | |
| 163 public String getResourceBase() | |
| 164 { | |
| 165 if (_baseResource==null) | |
| 166 return null; | |
| 167 return _baseResource.toString(); | |
| 168 } | |
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169 |
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170 |
| 805 | 171 /* ------------------------------------------------------------ */ |
| 172 /** | |
| 173 * @param base The resourceBase to set. | |
| 174 */ | |
| 175 public void setBaseResource(Resource base) | |
| 176 { | |
| 177 _baseResource=base; | |
| 178 } | |
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179 |
| 805 | 180 /* ------------------------------------------------------------ */ |
| 181 /** | |
| 182 * @param resourceBase The base resource as a string. | |
| 183 */ | |
| 184 public void setResourceBase(String resourceBase) | |
| 185 { | |
| 186 try | |
| 187 { | |
| 188 setBaseResource(Resource.newResource(resourceBase)); | |
| 189 } | |
| 190 catch (Exception e) | |
| 191 { | |
| 192 LOG.warn(e.toString()); | |
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193 LOG.debug("",e); |
| 805 | 194 throw new IllegalArgumentException(resourceBase); |
| 195 } | |
| 196 } | |
| 197 | |
| 198 /* ------------------------------------------------------------ */ | |
| 199 /** | |
| 200 * @return Returns the stylesheet as a Resource. | |
| 201 */ | |
| 202 public Resource getStylesheet() | |
| 203 { | |
| 204 if(_stylesheet != null) | |
| 205 { | |
| 206 return _stylesheet; | |
| 207 } | |
| 208 else | |
| 209 { | |
| 210 if(_defaultStylesheet == null) | |
| 211 { | |
| 212 try | |
| 213 { | |
| 214 _defaultStylesheet = Resource.newResource(this.getClass().getResource("/org/eclipse/jetty/jetty-dir.css")); | |
| 215 } | |
| 216 catch(IOException e) | |
| 217 { | |
| 218 LOG.warn(e.toString()); | |
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219 LOG.debug("",e); |
| 805 | 220 } |
| 221 } | |
| 222 return _defaultStylesheet; | |
| 223 } | |
| 224 } | |
| 225 | |
| 226 /* ------------------------------------------------------------ */ | |
| 227 /** | |
| 228 * @param stylesheet The location of the stylesheet to be used as a String. | |
| 229 */ | |
| 230 public void setStylesheet(String stylesheet) | |
| 231 { | |
| 232 try | |
| 233 { | |
| 234 _stylesheet = Resource.newResource(stylesheet); | |
| 235 if(!_stylesheet.exists()) | |
| 236 { | |
| 237 LOG.warn("unable to find custom stylesheet: " + stylesheet); | |
| 238 _stylesheet = null; | |
| 239 } | |
| 240 } | |
| 241 catch(Exception e) | |
| 242 { | |
| 243 LOG.warn(e.toString()); | |
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244 LOG.debug("",e); |
| 805 | 245 throw new IllegalArgumentException(stylesheet.toString()); |
| 246 } | |
| 247 } | |
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248 |
| 805 | 249 /* ------------------------------------------------------------ */ |
| 250 /** | |
| 251 * @return the cacheControl header to set on all static content. | |
| 252 */ | |
| 253 public String getCacheControl() | |
| 254 { | |
| 255 return _cacheControl.toString(); | |
| 256 } | |
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257 |
| 805 | 258 /* ------------------------------------------------------------ */ |
| 259 /** | |
| 260 * @param cacheControl the cacheControl header to set on all static content. | |
| 261 */ | |
| 262 public void setCacheControl(String cacheControl) | |
| 263 { | |
| 264 _cacheControl=cacheControl==null?null:new ByteArrayBuffer(cacheControl); | |
| 265 } | |
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266 |
| 805 | 267 /* ------------------------------------------------------------ */ |
| 268 /* | |
| 269 */ | |
| 270 public Resource getResource(String path) throws MalformedURLException | |
| 271 { | |
| 272 if (path==null || !path.startsWith("/")) | |
| 273 throw new MalformedURLException(path); | |
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274 |
| 805 | 275 Resource base = _baseResource; |
| 276 if (base==null) | |
| 277 { | |
| 278 if (_context==null) | |
| 279 return null; | |
| 280 base=_context.getBaseResource(); | |
| 281 if (base==null) | |
| 282 return null; | |
| 283 } | |
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284 |
| 805 | 285 try |
| 286 { | |
| 287 path=URIUtil.canonicalPath(path); | |
| 288 return base.addPath(path); | |
| 289 } | |
| 290 catch(Exception e) | |
| 291 { | |
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292 LOG.trace("",e); |
| 805 | 293 } |
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294 |
| 805 | 295 return null; |
| 296 } | |
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297 |
| 805 | 298 /* ------------------------------------------------------------ */ |
| 299 protected Resource getResource(HttpServletRequest request) throws MalformedURLException | |
| 300 { | |
| 301 String servletPath; | |
| 302 String pathInfo; | |
| 822 | 303 Boolean included = request.getAttribute(RequestDispatcher.INCLUDE_REQUEST_URI) != null; |
| 805 | 304 if (included != null && included.booleanValue()) |
| 305 { | |
| 822 | 306 servletPath = (String)request.getAttribute(RequestDispatcher.INCLUDE_SERVLET_PATH); |
| 307 pathInfo = (String)request.getAttribute(RequestDispatcher.INCLUDE_PATH_INFO); | |
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308 |
| 805 | 309 if (servletPath == null && pathInfo == null) |
| 310 { | |
| 311 servletPath = request.getServletPath(); | |
| 312 pathInfo = request.getPathInfo(); | |
| 313 } | |
| 314 } | |
| 315 else | |
| 316 { | |
| 317 servletPath = request.getServletPath(); | |
| 318 pathInfo = request.getPathInfo(); | |
| 319 } | |
| 320 | |
| 321 String pathInContext=URIUtil.addPaths(servletPath,pathInfo); | |
| 322 return getResource(pathInContext); | |
| 323 } | |
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324 |
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325 |
| 805 | 326 /* ------------------------------------------------------------ */ |
| 327 public String[] getWelcomeFiles() | |
| 328 { | |
| 329 return _welcomeFiles; | |
| 330 } | |
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331 |
| 805 | 332 /* ------------------------------------------------------------ */ |
| 333 public void setWelcomeFiles(String[] welcomeFiles) | |
| 334 { | |
| 335 _welcomeFiles=welcomeFiles; | |
| 336 } | |
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337 |
| 805 | 338 /* ------------------------------------------------------------ */ |
| 339 protected Resource getWelcome(Resource directory) throws MalformedURLException, IOException | |
| 340 { | |
| 341 for (int i=0;i<_welcomeFiles.length;i++) | |
| 342 { | |
| 343 Resource welcome=directory.addPath(_welcomeFiles[i]); | |
| 344 if (welcome.exists() && !welcome.isDirectory()) | |
| 345 return welcome; | |
| 346 } | |
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347 |
| 805 | 348 return null; |
| 349 } | |
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350 |
| 805 | 351 /* ------------------------------------------------------------ */ |
| 352 /* | |
| 353 * @see org.eclipse.jetty.server.Handler#handle(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, int) | |
| 354 */ | |
| 355 public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException | |
| 356 { | |
| 357 if (baseRequest.isHandled()) | |
| 358 return; | |
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359 |
| 805 | 360 boolean skipContentBody = false; |
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361 |
| 805 | 362 if(!HttpMethods.GET.equals(request.getMethod())) |
| 363 { | |
| 364 if(!HttpMethods.HEAD.equals(request.getMethod())) | |
| 365 { | |
| 366 //try another handler | |
| 367 super.handle(target, baseRequest, request, response); | |
| 368 return; | |
| 369 } | |
| 370 skipContentBody = true; | |
| 371 } | |
| 372 | |
| 373 Resource resource = getResource(request); | |
| 374 | |
| 375 if (resource==null || !resource.exists()) | |
| 376 { | |
| 377 if (target.endsWith("/jetty-dir.css")) | |
| 378 { | |
| 379 resource = getStylesheet(); | |
| 380 if (resource==null) | |
| 381 return; | |
| 382 response.setContentType("text/css"); | |
| 383 } | |
| 384 else | |
| 385 { | |
| 386 //no resource - try other handlers | |
| 387 super.handle(target, baseRequest, request, response); | |
| 388 return; | |
| 389 } | |
| 390 } | |
| 391 | |
| 392 if (!_aliases && resource.getAlias()!=null) | |
| 393 { | |
| 394 LOG.info(resource+" aliased to "+resource.getAlias()); | |
| 395 return; | |
| 396 } | |
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397 |
| 805 | 398 // We are going to serve something |
| 399 baseRequest.setHandled(true); | |
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400 |
| 805 | 401 if (resource.isDirectory()) |
| 402 { | |
| 403 if (!request.getPathInfo().endsWith(URIUtil.SLASH)) | |
| 404 { | |
| 405 response.sendRedirect(response.encodeRedirectURL(URIUtil.addPaths(request.getRequestURI(),URIUtil.SLASH))); | |
| 406 return; | |
| 407 } | |
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408 |
| 805 | 409 Resource welcome=getWelcome(resource); |
| 410 if (welcome!=null && welcome.exists()) | |
| 411 resource=welcome; | |
| 412 else | |
| 413 { | |
| 414 doDirectory(request,response,resource); | |
| 415 baseRequest.setHandled(true); | |
| 416 return; | |
| 417 } | |
| 418 } | |
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419 |
| 805 | 420 // set some headers |
| 421 long last_modified=resource.lastModified(); | |
| 422 if (last_modified>0) | |
| 423 { | |
| 424 long if_modified=request.getDateHeader(HttpHeaders.IF_MODIFIED_SINCE); | |
| 425 if (if_modified>0 && last_modified/1000<=if_modified/1000) | |
| 426 { | |
| 427 response.setStatus(HttpStatus.NOT_MODIFIED_304); | |
| 428 return; | |
| 429 } | |
| 430 } | |
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431 |
| 805 | 432 Buffer mime=_mimeTypes.getMimeByExtension(resource.toString()); |
| 433 if (mime==null) | |
| 434 mime=_mimeTypes.getMimeByExtension(request.getPathInfo()); | |
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435 |
| 805 | 436 // set the headers |
| 437 doResponseHeaders(response,resource,mime!=null?mime.toString():null); | |
| 438 response.setDateHeader(HttpHeaders.LAST_MODIFIED,last_modified); | |
| 439 | |
| 440 if(skipContentBody) | |
| 441 return; | |
| 442 // Send the content | |
| 443 OutputStream out =null; | |
| 444 try {out = response.getOutputStream();} | |
| 445 catch(IllegalStateException e) {out = new WriterOutputStream(response.getWriter());} | |
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446 |
| 805 | 447 // See if a short direct method can be used? |
| 448 if (out instanceof AbstractHttpConnection.Output) | |
| 449 { | |
| 450 // TODO file mapped buffers | |
| 451 ((AbstractHttpConnection.Output)out).sendContent(resource.getInputStream()); | |
| 452 } | |
| 453 else | |
| 454 { | |
| 455 // Write content normally | |
| 456 resource.writeTo(out,0,resource.length()); | |
| 457 } | |
| 458 } | |
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459 |
| 805 | 460 /* ------------------------------------------------------------ */ |
| 461 protected void doDirectory(HttpServletRequest request,HttpServletResponse response, Resource resource) | |
| 462 throws IOException | |
| 463 { | |
| 464 if (_directory) | |
| 465 { | |
| 466 String listing = resource.getListHTML(request.getRequestURI(),request.getPathInfo().lastIndexOf("/") > 0); | |
| 467 response.setContentType("text/html; charset=UTF-8"); | |
| 468 response.getWriter().println(listing); | |
| 469 } | |
| 470 else | |
| 471 response.sendError(HttpStatus.FORBIDDEN_403); | |
| 472 } | |
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473 |
| 805 | 474 /* ------------------------------------------------------------ */ |
| 475 /** Set the response headers. | |
| 476 * This method is called to set the response headers such as content type and content length. | |
| 477 * May be extended to add additional headers. | |
| 478 * @param response | |
| 479 * @param resource | |
| 480 * @param mimeType | |
| 481 */ | |
| 482 protected void doResponseHeaders(HttpServletResponse response, Resource resource, String mimeType) | |
| 483 { | |
| 484 if (mimeType!=null) | |
| 485 response.setContentType(mimeType); | |
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486 |
| 805 | 487 long length=resource.length(); |
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488 |
| 805 | 489 if (response instanceof Response) |
| 490 { | |
| 491 HttpFields fields = ((Response)response).getHttpFields(); | |
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492 |
| 805 | 493 if (length>0) |
| 494 fields.putLongField(HttpHeaders.CONTENT_LENGTH_BUFFER,length); | |
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495 |
| 805 | 496 if (_cacheControl!=null) |
| 497 fields.put(HttpHeaders.CACHE_CONTROL_BUFFER,_cacheControl); | |
| 498 } | |
| 499 else | |
| 500 { | |
| 501 if (length>0) | |
| 502 response.setHeader(HttpHeaders.CONTENT_LENGTH,Long.toString(length)); | |
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503 |
| 805 | 504 if (_cacheControl!=null) |
| 505 response.setHeader(HttpHeaders.CACHE_CONTROL,_cacheControl.toString()); | |
| 506 } | |
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507 |
| 805 | 508 } |
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509 } |