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annotate src/org/eclipse/jetty/server/handler/ResourceHandler.java @ 996:d9cfec64899c
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| author | Franklin Schmidt <fschmidt@gmail.com> |
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| date | Tue, 18 Oct 2016 21:22:53 -0600 |
| parents | 4e9d373bf6e9 |
| children | 7d28be82ab75 |
| 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 |
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255 private Resource getResource(Request request,String path) throws MalformedURLException |
| 805 | 256 { |
| 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 private Resource getResource(Request request) throws MalformedURLException |
| 805 | 285 { |
| 286 String servletPath; | |
| 287 String pathInfo; | |
| 822 | 288 Boolean included = request.getAttribute(RequestDispatcher.INCLUDE_REQUEST_URI) != null; |
| 805 | 289 if (included != null && included.booleanValue()) |
| 290 { | |
| 822 | 291 servletPath = (String)request.getAttribute(RequestDispatcher.INCLUDE_SERVLET_PATH); |
| 292 pathInfo = (String)request.getAttribute(RequestDispatcher.INCLUDE_PATH_INFO); | |
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293 |
| 805 | 294 if (servletPath == null && pathInfo == null) |
| 295 { | |
| 296 servletPath = request.getServletPath(); | |
| 297 pathInfo = request.getPathInfo(); | |
| 298 } | |
| 299 } | |
| 300 else | |
| 301 { | |
| 302 servletPath = request.getServletPath(); | |
| 303 pathInfo = request.getPathInfo(); | |
| 304 } | |
| 305 | |
| 992 | 306 String pathInContext = URIUtil.addPaths(servletPath,pathInfo); |
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307 return getResource(request,pathInContext); |
| 805 | 308 } |
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309 |
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310 |
| 805 | 311 /* ------------------------------------------------------------ */ |
| 312 public String[] getWelcomeFiles() | |
| 313 { | |
| 314 return _welcomeFiles; | |
| 315 } | |
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316 |
| 805 | 317 /* ------------------------------------------------------------ */ |
| 318 public void setWelcomeFiles(String[] welcomeFiles) | |
| 319 { | |
| 320 _welcomeFiles=welcomeFiles; | |
| 321 } | |
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322 |
| 805 | 323 /* ------------------------------------------------------------ */ |
| 324 protected Resource getWelcome(Resource directory) throws MalformedURLException, IOException | |
| 325 { | |
| 326 for (int i=0;i<_welcomeFiles.length;i++) | |
| 327 { | |
| 328 Resource welcome=directory.addPath(_welcomeFiles[i]); | |
| 329 if (welcome.exists() && !welcome.isDirectory()) | |
| 330 return welcome; | |
| 331 } | |
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332 |
| 805 | 333 return null; |
| 334 } | |
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335 |
| 805 | 336 /* ------------------------------------------------------------ */ |
| 337 /* | |
| 338 * @see org.eclipse.jetty.server.Handler#handle(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, int) | |
| 339 */ | |
| 340 public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException | |
| 341 { | |
| 342 if (baseRequest.isHandled()) | |
| 343 return; | |
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344 |
| 805 | 345 boolean skipContentBody = false; |
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346 |
| 805 | 347 if(!HttpMethods.GET.equals(request.getMethod())) |
| 348 { | |
| 349 if(!HttpMethods.HEAD.equals(request.getMethod())) | |
| 350 { | |
| 351 //try another handler | |
| 352 super.handle(target, baseRequest, request, response); | |
| 353 return; | |
| 354 } | |
| 355 skipContentBody = true; | |
| 356 } | |
| 357 | |
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358 Resource resource = getResource(baseRequest); |
| 805 | 359 |
| 360 if (resource==null || !resource.exists()) | |
| 361 { | |
| 362 if (target.endsWith("/jetty-dir.css")) | |
| 363 { | |
| 364 resource = getStylesheet(); | |
| 365 if (resource==null) | |
| 366 return; | |
| 367 response.setContentType("text/css"); | |
| 368 } | |
| 369 else | |
| 370 { | |
| 371 //no resource - try other handlers | |
| 372 super.handle(target, baseRequest, request, response); | |
| 373 return; | |
| 374 } | |
| 375 } | |
| 376 | |
| 377 if (!_aliases && resource.getAlias()!=null) | |
| 378 { | |
| 379 LOG.info(resource+" aliased to "+resource.getAlias()); | |
| 380 return; | |
| 381 } | |
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382 |
| 805 | 383 // We are going to serve something |
| 384 baseRequest.setHandled(true); | |
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385 |
| 805 | 386 if (resource.isDirectory()) |
| 387 { | |
| 388 if (!request.getPathInfo().endsWith(URIUtil.SLASH)) | |
| 389 { | |
| 390 response.sendRedirect(response.encodeRedirectURL(URIUtil.addPaths(request.getRequestURI(),URIUtil.SLASH))); | |
| 391 return; | |
| 392 } | |
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393 |
| 805 | 394 Resource welcome=getWelcome(resource); |
| 395 if (welcome!=null && welcome.exists()) | |
| 396 resource=welcome; | |
| 397 else | |
| 398 { | |
| 399 doDirectory(request,response,resource); | |
| 400 baseRequest.setHandled(true); | |
| 401 return; | |
| 402 } | |
| 403 } | |
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404 |
| 805 | 405 // set some headers |
| 406 long last_modified=resource.lastModified(); | |
| 407 if (last_modified>0) | |
| 408 { | |
| 409 long if_modified=request.getDateHeader(HttpHeaders.IF_MODIFIED_SINCE); | |
| 410 if (if_modified>0 && last_modified/1000<=if_modified/1000) | |
| 411 { | |
| 412 response.setStatus(HttpStatus.NOT_MODIFIED_304); | |
| 413 return; | |
| 414 } | |
| 415 } | |
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416 |
| 805 | 417 Buffer mime=_mimeTypes.getMimeByExtension(resource.toString()); |
| 418 if (mime==null) | |
| 419 mime=_mimeTypes.getMimeByExtension(request.getPathInfo()); | |
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420 |
| 805 | 421 // set the headers |
| 422 doResponseHeaders(response,resource,mime!=null?mime.toString():null); | |
| 423 response.setDateHeader(HttpHeaders.LAST_MODIFIED,last_modified); | |
| 424 | |
| 425 if(skipContentBody) | |
| 426 return; | |
| 427 // Send the content | |
| 428 OutputStream out =null; | |
| 429 try {out = response.getOutputStream();} | |
| 430 catch(IllegalStateException e) {out = new WriterOutputStream(response.getWriter());} | |
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431 |
| 805 | 432 // See if a short direct method can be used? |
| 433 if (out instanceof AbstractHttpConnection.Output) | |
| 434 { | |
| 435 // TODO file mapped buffers | |
| 436 ((AbstractHttpConnection.Output)out).sendContent(resource.getInputStream()); | |
| 437 } | |
| 438 else | |
| 439 { | |
| 440 // Write content normally | |
| 441 resource.writeTo(out,0,resource.length()); | |
| 442 } | |
| 443 } | |
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444 |
| 805 | 445 /* ------------------------------------------------------------ */ |
| 446 protected void doDirectory(HttpServletRequest request,HttpServletResponse response, Resource resource) | |
| 447 throws IOException | |
| 448 { | |
| 449 if (_directory) | |
| 450 { | |
| 451 String listing = resource.getListHTML(request.getRequestURI(),request.getPathInfo().lastIndexOf("/") > 0); | |
| 452 response.setContentType("text/html; charset=UTF-8"); | |
| 453 response.getWriter().println(listing); | |
| 454 } | |
| 455 else | |
| 456 response.sendError(HttpStatus.FORBIDDEN_403); | |
| 457 } | |
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458 |
| 805 | 459 /* ------------------------------------------------------------ */ |
| 460 /** Set the response headers. | |
| 461 * This method is called to set the response headers such as content type and content length. | |
| 462 * May be extended to add additional headers. | |
| 463 * @param response | |
| 464 * @param resource | |
| 465 * @param mimeType | |
| 466 */ | |
| 467 protected void doResponseHeaders(HttpServletResponse response, Resource resource, String mimeType) | |
| 468 { | |
| 469 if (mimeType!=null) | |
| 470 response.setContentType(mimeType); | |
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471 |
| 805 | 472 long length=resource.length(); |
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473 |
| 805 | 474 if (response instanceof Response) |
| 475 { | |
| 476 HttpFields fields = ((Response)response).getHttpFields(); | |
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477 |
| 805 | 478 if (length>0) |
| 479 fields.putLongField(HttpHeaders.CONTENT_LENGTH_BUFFER,length); | |
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480 |
| 805 | 481 if (_cacheControl!=null) |
| 482 fields.put(HttpHeaders.CACHE_CONTROL_BUFFER,_cacheControl); | |
| 483 } | |
| 484 else | |
| 485 { | |
| 486 if (length>0) | |
| 487 response.setHeader(HttpHeaders.CONTENT_LENGTH,Long.toString(length)); | |
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488 |
| 805 | 489 if (_cacheControl!=null) |
| 490 response.setHeader(HttpHeaders.CACHE_CONTROL,_cacheControl.toString()); | |
| 491 } | |
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492 |
| 805 | 493 } |
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494 } |