Mercurial Hosting > luan
annotate src/org/eclipse/jetty/server/handler/ResourceHandler.java @ 991:688c39c50ee3
simplify ContextHandler
| author | Franklin Schmidt <fschmidt@gmail.com> |
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| date | Tue, 18 Oct 2016 00:22:46 -0600 |
| parents | f89abbfb3a8f |
| children | 0608a6664bee |
| 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 */ |
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58 public 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 ContextHandler _context; |
| 63 Resource _baseResource; | |
| 64 Resource _defaultStylesheet; | |
| 65 Resource _stylesheet; | |
| 66 String[] _welcomeFiles={"index.html"}; | |
| 67 MimeTypes _mimeTypes = new MimeTypes(); | |
| 68 ByteArrayBuffer _cacheControl; | |
| 69 boolean _aliases; | |
| 70 boolean _directory; | |
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71 |
| 805 | 72 /* ------------------------------------------------------------ */ |
| 73 public ResourceHandler() | |
| 74 { | |
| 75 | |
| 76 } | |
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77 |
| 805 | 78 /* ------------------------------------------------------------ */ |
| 79 public MimeTypes getMimeTypes() | |
| 80 { | |
| 81 return _mimeTypes; | |
| 82 } | |
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83 |
| 805 | 84 /* ------------------------------------------------------------ */ |
| 85 public void setMimeTypes(MimeTypes mimeTypes) | |
| 86 { | |
| 87 _mimeTypes = mimeTypes; | |
| 88 } | |
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89 |
| 805 | 90 /* ------------------------------------------------------------ */ |
| 91 /** | |
| 92 * @return True if resource aliases are allowed. | |
| 93 */ | |
| 94 public boolean isAliases() | |
| 95 { | |
| 96 return _aliases; | |
| 97 } | |
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98 |
| 805 | 99 /* ------------------------------------------------------------ */ |
| 100 /** | |
| 101 * Set if resource aliases (eg symlink, 8.3 names, case insensitivity) are allowed. | |
| 102 * Allowing aliases can significantly increase security vulnerabilities. | |
| 103 * If this handler is deployed inside a ContextHandler, then the | |
| 104 * {@link ContextHandler#isAliases()} takes precedent. | |
| 105 * @param aliases True if aliases are supported. | |
| 106 */ | |
| 107 public void setAliases(boolean aliases) | |
| 108 { | |
| 109 _aliases = aliases; | |
| 110 } | |
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111 |
| 805 | 112 /* ------------------------------------------------------------ */ |
| 113 /** Get the directory option. | |
| 114 * @return true if directories are listed. | |
| 115 */ | |
| 116 public boolean isDirectoriesListed() | |
| 117 { | |
| 118 return _directory; | |
| 119 } | |
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120 |
| 805 | 121 /* ------------------------------------------------------------ */ |
| 122 /** Set the directory. | |
| 123 * @param directory true if directories are listed. | |
| 124 */ | |
| 125 public void setDirectoriesListed(boolean directory) | |
| 126 { | |
| 127 _directory = directory; | |
| 128 } | |
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129 |
| 805 | 130 /* ------------------------------------------------------------ */ |
| 131 @Override | |
| 132 public void doStart() | |
| 133 throws Exception | |
| 134 { | |
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135 _context = ContextHandler.getCurrentContext(); |
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136 |
| 805 | 137 if (!_aliases && !FileResource.getCheckAliases()) |
| 138 throw new IllegalStateException("Alias checking disabled"); | |
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139 |
| 805 | 140 super.doStart(); |
| 141 } | |
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142 |
| 805 | 143 /* ------------------------------------------------------------ */ |
| 144 /** | |
| 145 * @return Returns the resourceBase. | |
| 146 */ | |
| 147 public Resource getBaseResource() | |
| 148 { | |
| 149 if (_baseResource==null) | |
| 150 return null; | |
| 151 return _baseResource; | |
| 152 } | |
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153 |
| 805 | 154 /* ------------------------------------------------------------ */ |
| 155 /** | |
| 156 * @return Returns the base resource as a string. | |
| 157 */ | |
| 158 public String getResourceBase() | |
| 159 { | |
| 160 if (_baseResource==null) | |
| 161 return null; | |
| 162 return _baseResource.toString(); | |
| 163 } | |
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164 |
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165 |
| 805 | 166 /* ------------------------------------------------------------ */ |
| 167 /** | |
| 168 * @param base The resourceBase to set. | |
| 169 */ | |
| 170 public void setBaseResource(Resource base) | |
| 171 { | |
| 172 _baseResource=base; | |
| 173 } | |
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174 |
| 805 | 175 /* ------------------------------------------------------------ */ |
| 176 /** | |
| 177 * @param resourceBase The base resource as a string. | |
| 178 */ | |
| 179 public void setResourceBase(String resourceBase) | |
| 180 { | |
| 181 try | |
| 182 { | |
| 183 setBaseResource(Resource.newResource(resourceBase)); | |
| 184 } | |
| 185 catch (Exception e) | |
| 186 { | |
| 187 LOG.warn(e.toString()); | |
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188 LOG.debug("",e); |
| 805 | 189 throw new IllegalArgumentException(resourceBase); |
| 190 } | |
| 191 } | |
| 192 | |
| 193 /* ------------------------------------------------------------ */ | |
| 194 /** | |
| 195 * @return Returns the stylesheet as a Resource. | |
| 196 */ | |
| 197 public Resource getStylesheet() | |
| 198 { | |
| 199 if(_stylesheet != null) | |
| 200 { | |
| 201 return _stylesheet; | |
| 202 } | |
| 203 else | |
| 204 { | |
| 205 if(_defaultStylesheet == null) | |
| 206 { | |
| 207 try | |
| 208 { | |
| 209 _defaultStylesheet = Resource.newResource(this.getClass().getResource("/org/eclipse/jetty/jetty-dir.css")); | |
| 210 } | |
| 211 catch(IOException e) | |
| 212 { | |
| 213 LOG.warn(e.toString()); | |
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214 LOG.debug("",e); |
| 805 | 215 } |
| 216 } | |
| 217 return _defaultStylesheet; | |
| 218 } | |
| 219 } | |
| 220 | |
| 221 /* ------------------------------------------------------------ */ | |
| 222 /** | |
| 223 * @param stylesheet The location of the stylesheet to be used as a String. | |
| 224 */ | |
| 225 public void setStylesheet(String stylesheet) | |
| 226 { | |
| 227 try | |
| 228 { | |
| 229 _stylesheet = Resource.newResource(stylesheet); | |
| 230 if(!_stylesheet.exists()) | |
| 231 { | |
| 232 LOG.warn("unable to find custom stylesheet: " + stylesheet); | |
| 233 _stylesheet = null; | |
| 234 } | |
| 235 } | |
| 236 catch(Exception e) | |
| 237 { | |
| 238 LOG.warn(e.toString()); | |
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239 LOG.debug("",e); |
| 805 | 240 throw new IllegalArgumentException(stylesheet.toString()); |
| 241 } | |
| 242 } | |
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243 |
| 805 | 244 /* ------------------------------------------------------------ */ |
| 245 /** | |
| 246 * @return the cacheControl header to set on all static content. | |
| 247 */ | |
| 248 public String getCacheControl() | |
| 249 { | |
| 250 return _cacheControl.toString(); | |
| 251 } | |
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252 |
| 805 | 253 /* ------------------------------------------------------------ */ |
| 254 /** | |
| 255 * @param cacheControl the cacheControl header to set on all static content. | |
| 256 */ | |
| 257 public void setCacheControl(String cacheControl) | |
| 258 { | |
| 259 _cacheControl=cacheControl==null?null:new ByteArrayBuffer(cacheControl); | |
| 260 } | |
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261 |
| 805 | 262 /* ------------------------------------------------------------ */ |
| 263 /* | |
| 264 */ | |
| 265 public Resource getResource(String path) throws MalformedURLException | |
| 266 { | |
| 267 if (path==null || !path.startsWith("/")) | |
| 268 throw new MalformedURLException(path); | |
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269 |
| 805 | 270 Resource base = _baseResource; |
| 271 if (base==null) | |
| 272 { | |
| 273 if (_context==null) | |
| 274 return null; | |
| 275 base=_context.getBaseResource(); | |
| 276 if (base==null) | |
| 277 return null; | |
| 278 } | |
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279 |
| 805 | 280 try |
| 281 { | |
| 282 path=URIUtil.canonicalPath(path); | |
| 283 return base.addPath(path); | |
| 284 } | |
| 285 catch(Exception e) | |
| 286 { | |
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287 LOG.trace("",e); |
| 805 | 288 } |
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289 |
| 805 | 290 return null; |
| 291 } | |
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292 |
| 805 | 293 /* ------------------------------------------------------------ */ |
| 294 protected Resource getResource(HttpServletRequest request) throws MalformedURLException | |
| 295 { | |
| 296 String servletPath; | |
| 297 String pathInfo; | |
| 822 | 298 Boolean included = request.getAttribute(RequestDispatcher.INCLUDE_REQUEST_URI) != null; |
| 805 | 299 if (included != null && included.booleanValue()) |
| 300 { | |
| 822 | 301 servletPath = (String)request.getAttribute(RequestDispatcher.INCLUDE_SERVLET_PATH); |
| 302 pathInfo = (String)request.getAttribute(RequestDispatcher.INCLUDE_PATH_INFO); | |
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303 |
| 805 | 304 if (servletPath == null && pathInfo == null) |
| 305 { | |
| 306 servletPath = request.getServletPath(); | |
| 307 pathInfo = request.getPathInfo(); | |
| 308 } | |
| 309 } | |
| 310 else | |
| 311 { | |
| 312 servletPath = request.getServletPath(); | |
| 313 pathInfo = request.getPathInfo(); | |
| 314 } | |
| 315 | |
| 316 String pathInContext=URIUtil.addPaths(servletPath,pathInfo); | |
| 317 return getResource(pathInContext); | |
| 318 } | |
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319 |
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320 |
| 805 | 321 /* ------------------------------------------------------------ */ |
| 322 public String[] getWelcomeFiles() | |
| 323 { | |
| 324 return _welcomeFiles; | |
| 325 } | |
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326 |
| 805 | 327 /* ------------------------------------------------------------ */ |
| 328 public void setWelcomeFiles(String[] welcomeFiles) | |
| 329 { | |
| 330 _welcomeFiles=welcomeFiles; | |
| 331 } | |
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332 |
| 805 | 333 /* ------------------------------------------------------------ */ |
| 334 protected Resource getWelcome(Resource directory) throws MalformedURLException, IOException | |
| 335 { | |
| 336 for (int i=0;i<_welcomeFiles.length;i++) | |
| 337 { | |
| 338 Resource welcome=directory.addPath(_welcomeFiles[i]); | |
| 339 if (welcome.exists() && !welcome.isDirectory()) | |
| 340 return welcome; | |
| 341 } | |
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342 |
| 805 | 343 return null; |
| 344 } | |
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345 |
| 805 | 346 /* ------------------------------------------------------------ */ |
| 347 /* | |
| 348 * @see org.eclipse.jetty.server.Handler#handle(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, int) | |
| 349 */ | |
| 350 public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException | |
| 351 { | |
| 352 if (baseRequest.isHandled()) | |
| 353 return; | |
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354 |
| 805 | 355 boolean skipContentBody = false; |
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356 |
| 805 | 357 if(!HttpMethods.GET.equals(request.getMethod())) |
| 358 { | |
| 359 if(!HttpMethods.HEAD.equals(request.getMethod())) | |
| 360 { | |
| 361 //try another handler | |
| 362 super.handle(target, baseRequest, request, response); | |
| 363 return; | |
| 364 } | |
| 365 skipContentBody = true; | |
| 366 } | |
| 367 | |
| 368 Resource resource = getResource(request); | |
| 369 | |
| 370 if (resource==null || !resource.exists()) | |
| 371 { | |
| 372 if (target.endsWith("/jetty-dir.css")) | |
| 373 { | |
| 374 resource = getStylesheet(); | |
| 375 if (resource==null) | |
| 376 return; | |
| 377 response.setContentType("text/css"); | |
| 378 } | |
| 379 else | |
| 380 { | |
| 381 //no resource - try other handlers | |
| 382 super.handle(target, baseRequest, request, response); | |
| 383 return; | |
| 384 } | |
| 385 } | |
| 386 | |
| 387 if (!_aliases && resource.getAlias()!=null) | |
| 388 { | |
| 389 LOG.info(resource+" aliased to "+resource.getAlias()); | |
| 390 return; | |
| 391 } | |
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392 |
| 805 | 393 // We are going to serve something |
| 394 baseRequest.setHandled(true); | |
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395 |
| 805 | 396 if (resource.isDirectory()) |
| 397 { | |
| 398 if (!request.getPathInfo().endsWith(URIUtil.SLASH)) | |
| 399 { | |
| 400 response.sendRedirect(response.encodeRedirectURL(URIUtil.addPaths(request.getRequestURI(),URIUtil.SLASH))); | |
| 401 return; | |
| 402 } | |
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403 |
| 805 | 404 Resource welcome=getWelcome(resource); |
| 405 if (welcome!=null && welcome.exists()) | |
| 406 resource=welcome; | |
| 407 else | |
| 408 { | |
| 409 doDirectory(request,response,resource); | |
| 410 baseRequest.setHandled(true); | |
| 411 return; | |
| 412 } | |
| 413 } | |
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414 |
| 805 | 415 // set some headers |
| 416 long last_modified=resource.lastModified(); | |
| 417 if (last_modified>0) | |
| 418 { | |
| 419 long if_modified=request.getDateHeader(HttpHeaders.IF_MODIFIED_SINCE); | |
| 420 if (if_modified>0 && last_modified/1000<=if_modified/1000) | |
| 421 { | |
| 422 response.setStatus(HttpStatus.NOT_MODIFIED_304); | |
| 423 return; | |
| 424 } | |
| 425 } | |
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426 |
| 805 | 427 Buffer mime=_mimeTypes.getMimeByExtension(resource.toString()); |
| 428 if (mime==null) | |
| 429 mime=_mimeTypes.getMimeByExtension(request.getPathInfo()); | |
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430 |
| 805 | 431 // set the headers |
| 432 doResponseHeaders(response,resource,mime!=null?mime.toString():null); | |
| 433 response.setDateHeader(HttpHeaders.LAST_MODIFIED,last_modified); | |
| 434 | |
| 435 if(skipContentBody) | |
| 436 return; | |
| 437 // Send the content | |
| 438 OutputStream out =null; | |
| 439 try {out = response.getOutputStream();} | |
| 440 catch(IllegalStateException e) {out = new WriterOutputStream(response.getWriter());} | |
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441 |
| 805 | 442 // See if a short direct method can be used? |
| 443 if (out instanceof AbstractHttpConnection.Output) | |
| 444 { | |
| 445 // TODO file mapped buffers | |
| 446 ((AbstractHttpConnection.Output)out).sendContent(resource.getInputStream()); | |
| 447 } | |
| 448 else | |
| 449 { | |
| 450 // Write content normally | |
| 451 resource.writeTo(out,0,resource.length()); | |
| 452 } | |
| 453 } | |
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454 |
| 805 | 455 /* ------------------------------------------------------------ */ |
| 456 protected void doDirectory(HttpServletRequest request,HttpServletResponse response, Resource resource) | |
| 457 throws IOException | |
| 458 { | |
| 459 if (_directory) | |
| 460 { | |
| 461 String listing = resource.getListHTML(request.getRequestURI(),request.getPathInfo().lastIndexOf("/") > 0); | |
| 462 response.setContentType("text/html; charset=UTF-8"); | |
| 463 response.getWriter().println(listing); | |
| 464 } | |
| 465 else | |
| 466 response.sendError(HttpStatus.FORBIDDEN_403); | |
| 467 } | |
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468 |
| 805 | 469 /* ------------------------------------------------------------ */ |
| 470 /** Set the response headers. | |
| 471 * This method is called to set the response headers such as content type and content length. | |
| 472 * May be extended to add additional headers. | |
| 473 * @param response | |
| 474 * @param resource | |
| 475 * @param mimeType | |
| 476 */ | |
| 477 protected void doResponseHeaders(HttpServletResponse response, Resource resource, String mimeType) | |
| 478 { | |
| 479 if (mimeType!=null) | |
| 480 response.setContentType(mimeType); | |
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481 |
| 805 | 482 long length=resource.length(); |
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483 |
| 805 | 484 if (response instanceof Response) |
| 485 { | |
| 486 HttpFields fields = ((Response)response).getHttpFields(); | |
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487 |
| 805 | 488 if (length>0) |
| 489 fields.putLongField(HttpHeaders.CONTENT_LENGTH_BUFFER,length); | |
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490 |
| 805 | 491 if (_cacheControl!=null) |
| 492 fields.put(HttpHeaders.CACHE_CONTROL_BUFFER,_cacheControl); | |
| 493 } | |
| 494 else | |
| 495 { | |
| 496 if (length>0) | |
| 497 response.setHeader(HttpHeaders.CONTENT_LENGTH,Long.toString(length)); | |
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498 |
| 805 | 499 if (_cacheControl!=null) |
| 500 response.setHeader(HttpHeaders.CACHE_CONTROL,_cacheControl.toString()); | |
| 501 } | |
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502 |
| 805 | 503 } |
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504 } |