List of usage examples for javax.servlet.http HttpServletResponse SC_PRECONDITION_FAILED
int SC_PRECONDITION_FAILED
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From source file:com.github.zhanhb.ckfinder.download.PathPartial.java
/** * Check if the if-unmodified-since condition is satisfied. * * @param request The servlet request we are processing * @param attr File attributes//w w w .jav a2 s . c om */ private void checkIfUnmodifiedSince(HttpServletRequest request, BasicFileAttributes attr) { if (request.getHeader(HttpHeaders.IF_MATCH) == null) { try { long lastModified = attr.lastModifiedTime().toMillis(); long headerValue = request.getDateHeader(HttpHeaders.IF_UNMODIFIED_SINCE); if (headerValue != -1 && lastModified >= headerValue + 1000) { // The entity has not been modified since the date // specified by the client. This is not an error case. throw new UncheckException(HttpServletResponse.SC_PRECONDITION_FAILED); } } catch (IllegalArgumentException ex) { throw new UncheckException(HttpServletResponse.SC_PRECONDITION_FAILED); } } }
From source file:com.enonic.cms.server.service.webdav.DavResourceImpl.java
public void unlock(String lockToken) throws DavException { ActiveLock lock = getLock(Type.WRITE, Scope.EXCLUSIVE); if (lock == null) { throw new DavException(HttpServletResponse.SC_PRECONDITION_FAILED); } else if (lock.isLockedByToken(lockToken)) { lockManager.releaseLock(lockToken, this); } else {/* w ww . jav a2s . c o m*/ throw new DavException(DavServletResponse.SC_LOCKED); } }
From source file:ch.entwine.weblounge.common.impl.request.Http11ProtocolHandler.java
/** * Method generateHeaders./*from w w w . j a va 2 s .c om*/ * * @param resp * @param type */ public static void generateHeaders(HttpServletResponse resp, Http11ResponseType type) { /* generate headers only once! */ if (type.headers) return; type.headers = true; /* adjust the statistics */ ++stats[STATS_HEADER_GENERATED]; incResponseStats(type.type, headerStats); /* set the date header */ resp.setDateHeader(HEADER_DATE, type.time); /* check expires */ if (type.expires > type.time + MS_PER_YEAR) { type.expires = type.time + MS_PER_YEAR; log.warn("Expiration date too far in the future. Adjusting."); } /* set the standard headers and status code */ switch (type.type) { case RESPONSE_PARTIAL_CONTENT: if (type.expires > type.time) resp.setDateHeader(HEADER_EXPIRES, type.expires); if (type.modified > 0) { resp.setHeader(HEADER_ETAG, Http11Utils.calcETag(type.modified)); resp.setDateHeader(HEADER_LAST_MODIFIED, type.modified); } if (type.size < 0 || type.from < 0 || type.to < 0 || type.from > type.to || type.to > type.size) { resp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); break; } resp.setContentLength((int) type.size); resp.setHeader(HEADER_CONTENT_RANGE, "bytes " + type.from + "-" + type.to + "/" + type.size); resp.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT); break; case RESPONSE_OK: if (type.expires > type.time) { resp.setDateHeader(HEADER_EXPIRES, type.expires); } else if (type.expires == 0) { resp.setHeader(HEADER_CACHE_CONTROL, "no-cache"); resp.setHeader(HEADER_PRAGMA, "no-cache"); resp.setDateHeader(HEADER_EXPIRES, 0); } if (type.modified > 0) { resp.setHeader(HEADER_ETAG, Http11Utils.calcETag(type.modified)); resp.setDateHeader(HEADER_LAST_MODIFIED, type.modified); } if (type.size >= 0) resp.setContentLength((int) type.size); resp.setStatus(HttpServletResponse.SC_OK); break; case RESPONSE_NOT_MODIFIED: if (type.expires > type.time) resp.setDateHeader(HEADER_EXPIRES, type.expires); if (type.modified > 0) resp.setHeader(HEADER_ETAG, Http11Utils.calcETag(type.modified)); resp.setStatus(HttpServletResponse.SC_NOT_MODIFIED); break; case RESPONSE_METHOD_NOT_ALLOWED: resp.setHeader(HEADER_ALLOW, "GET, POST, HEAD"); resp.setStatus(HttpServletResponse.SC_METHOD_NOT_ALLOWED); break; case RESPONSE_PRECONDITION_FAILED: if (type.expires > type.time) resp.setDateHeader(HEADER_EXPIRES, type.expires); if (type.modified > 0) { resp.setHeader(HEADER_ETAG, Http11Utils.calcETag(type.modified)); resp.setDateHeader(HEADER_LAST_MODIFIED, type.modified); } resp.setStatus(HttpServletResponse.SC_PRECONDITION_FAILED); break; case RESPONSE_REQUESTED_RANGE_NOT_SATISFIABLE: if (type.expires > type.time) resp.setDateHeader(HEADER_EXPIRES, type.expires); if (type.modified > 0) { resp.setHeader(HEADER_ETAG, Http11Utils.calcETag(type.modified)); resp.setDateHeader(HEADER_LAST_MODIFIED, type.modified); } if (type.size >= 0) resp.setHeader(HEADER_CONTENT_RANGE, "*/" + type.size); break; case RESPONSE_INTERNAL_SERVER_ERROR: default: resp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); } }
From source file:org.apache.archiva.webdav.ArchivaDavResource.java
@Override public void unlock(String lockToken) throws DavException { ActiveLock lock = getLock(Type.WRITE, Scope.EXCLUSIVE); if (lock == null) { throw new DavException(HttpServletResponse.SC_PRECONDITION_FAILED); } else if (lock.isLockedByToken(lockToken)) { lockManager.releaseLock(lockToken, this); } else {// ww w.j av a 2 s. co m throw new DavException(DavServletResponse.SC_LOCKED); } }
From source file:de.digitalcollections.streaming.euphoria.controller.StreamingController.java
/** * Create response for the request.// www .j ava 2 s . c om * * @param id The id of requested content. * @param extension The (target) file extension/format of requested content. * @param request The request to be responded to. * @param response The response to the request. * @param head "true" if response body should be written (GET) or "false" if not (HEAD). * @throws IOException If something fails at I/O level. */ private void respond(String id, String extension, HttpServletRequest request, HttpServletResponse response, boolean head) throws IOException { logRequestHeaders(request); response.reset(); // try to get access to resource Resource resource; try { resource = getResource(id, extension); } catch (ResourceIOException ex) { LOGGER.warn("*** Response {}: Error referencing streaming resource with id {} and extension {}", HttpServletResponse.SC_NOT_FOUND, id, extension); response.sendError(HttpServletResponse.SC_NOT_FOUND); return; } // get resource metadata ResourceInfo resourceInfo = new ResourceInfo(id, resource); if (resourceInfo.length <= 0) { LOGGER.warn("*** Response {}: Error streaming resource with id {} and extension {}: not found/no size", HttpServletResponse.SC_NOT_FOUND, id, extension); response.sendError(HttpServletResponse.SC_NOT_FOUND); return; } if (preconditionFailed(request, resourceInfo)) { LOGGER.warn( "*** Response {}: Precondition If-Match/If-Unmodified-Since failed for resource with id {} and extension {}.", HttpServletResponse.SC_PRECONDITION_FAILED, id, extension); response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED); return; } setCacheHeaders(response, resourceInfo); if (notModified(request, resourceInfo)) { LOGGER.debug("*** Response {}: 'Not modified'-response for resource with id {} and extension {}.", HttpServletResponse.SC_NOT_MODIFIED, id, extension); response.setStatus(HttpServletResponse.SC_NOT_MODIFIED); return; } List<Range> ranges = getRanges(request, resourceInfo); if (ranges == null) { response.setHeader("Content-Range", "bytes */" + resourceInfo.length); LOGGER.warn("Response {}: Header Range for resource with id {} and extension {} not satisfiable", HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE, id, extension); response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE); return; } if (!ranges.isEmpty()) { response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT); } else { ranges.add(new Range(0, resourceInfo.length - 1)); // Full content. } String contentType = setContentHeaders(request, response, resourceInfo, ranges); boolean acceptsGzip = false; // If content type is text, then determine whether GZIP content encoding is supported by // the browser and expand content type with the one and right character encoding. if (contentType.startsWith("text")) { String acceptEncoding = request.getHeader("Accept-Encoding"); acceptsGzip = acceptEncoding != null && accepts(acceptEncoding, "gzip"); contentType += ";charset=UTF-8"; } if (head) { return; } writeContent(response, resource, resourceInfo, ranges, contentType, acceptsGzip); LOGGER.debug("*** RESPONSE FINISHED ***"); }
From source file:net.yacy.http.servlets.YaCyDefaultServlet.java
protected boolean passConditionalHeaders(HttpServletRequest request, HttpServletResponse response, Resource resource) throws IOException { try {//from w ww . j av a 2 s .c om if (!request.getMethod().equals(HttpMethod.HEAD.asString())) { String ifms = request.getHeader(HttpHeader.IF_MODIFIED_SINCE.asString()); if (ifms != null) { long ifmsl = request.getDateHeader(HttpHeader.IF_MODIFIED_SINCE.asString()); if (ifmsl != -1) { if (resource.lastModified() / 1000 <= ifmsl / 1000) { response.reset(); response.setStatus(HttpServletResponse.SC_NOT_MODIFIED); response.flushBuffer(); return false; } } } // Parse the if[un]modified dates and compare to resource long date = request.getDateHeader(HttpHeader.IF_UNMODIFIED_SINCE.asString()); if (date != -1) { if (resource.lastModified() / 1000 > date / 1000) { response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED); return false; } } } } catch (IllegalArgumentException iae) { if (!response.isCommitted()) { response.sendError(HttpServletResponse.SC_BAD_REQUEST, iae.getMessage()); return false; } throw iae; } return true; }
From source file:jp.aegif.alfresco.online_webdav.WebDAVMethod.java
/** * Parses "If" header of the request./*from ww w . j a v a2 s . c o m*/ * Stores conditions that should be checked. * Parses both No-tag-list and Tagged-list formats * See "10.4.2 Syntax" paragraph of the WebDAV specification for "If" header format. * */ protected void parseIfHeader() throws WebDAVServerException { //String strLockToken = null; String strIf = m_request.getHeader(WebDAV.HEADER_IF); if (logger.isDebugEnabled()) logger.debug("Parsing If header: " + strIf); if (strIf != null && strIf.length() > 0) { if (strIf.startsWith("<")) { m_resourceTag = strIf.substring(1, strIf.indexOf(">")); strIf = strIf.substring(m_resourceTag.length() + 3); } m_conditions = new LinkedList<Condition>(); String[] parts = strIf.split("\\) \\("); for (int i = 0; i < parts.length; i++) { String partString = parts[i].replaceAll("\\(", "").replaceAll("\\)", ""); Condition c = new Condition(); String[] conditions = partString.split(" "); for (int j = 0; j < conditions.length; j++) { boolean fNot = false; String eTag = null; String lockToken = null; if (WebDAV.HEADER_KEY_NOT.equals(conditions[j])) { // Check if Not keyword followed by State-token or entity-tag if (j == (conditions.length - 1)) { throw new WebDAVServerException(HttpServletResponse.SC_PRECONDITION_FAILED); } fNot = true; j++; } // read State-token int index = conditions[j].indexOf('<'); if (index != -1) { try { String s = conditions[j].substring(index + 1, conditions[j].indexOf(">")); if (!s.startsWith(WebDAV.OPAQUE_LOCK_TOKEN)) { if (!fNot) { throw new WebDAVServerException(HttpServletResponse.SC_PRECONDITION_FAILED); } } else { lockToken = s; c.addLockTocken(lockToken, fNot); } } catch (IndexOutOfBoundsException e) { throw new WebDAVServerException(HttpServletResponse.SC_PRECONDITION_FAILED); } } // read entity-tag index = conditions[j].indexOf("[\""); if (index != -1) { // TODO: implement parsing of weak ETags: W/"123..". int index2 = conditions[j].indexOf("]"); if (index2 == -1) { logger.warn("No closing ']': " + conditions[j]); index2 = conditions[j].length(); } eTag = conditions[j].substring(index + 1, index2); c.addETag(eTag, fNot); } } m_conditions.add(c); } } }
From source file:org.openhab.ui.cometvisu.servlet.CometVisuServlet.java
/** * Process the actual request.//from w w w .ja v a 2 s. c o m * * @param request * The request to be processed. * @param response * The response to be created. * @param content * Whether the request body should be written (GET) or not * (HEAD). * @throws IOException * If something fails at I/O level. * * @author BalusC * @link * http://balusc.blogspot.com/2009/02/fileservlet-supporting-resume-and * .html */ private void processStaticRequest(File file, HttpServletRequest request, HttpServletResponse response, boolean content) throws IOException { // Validate the requested file // ------------------------------------------------------------ if (file == null) { // Get requested file by path info. String requestedFile = request.getPathInfo(); // Check if file is actually supplied to the request URL. if (requestedFile == null) { // Do your thing if the file is not supplied to the request URL. // Throw an exception, or send 404, or show default/warning // page, or // just ignore it. response.sendError(HttpServletResponse.SC_NOT_FOUND); return; } // URL-decode the file name (might contain spaces and on) and // prepare // file object. file = new File(rootFolder, URLDecoder.decode(requestedFile, "UTF-8")); } // Check if file actually exists in filesystem. if (!file.exists()) { // Do your thing if the file appears to be non-existing. // Throw an exception, or send 404, or show default/warning page, or // just ignore it. response.sendError(HttpServletResponse.SC_NOT_FOUND); return; } // Prepare some variables. The ETag is an unique identifier of the file. String fileName = file.getName(); long length = file.length(); long lastModified = file.lastModified(); String eTag = fileName + "_" + length + "_" + lastModified; long expires = System.currentTimeMillis() + DEFAULT_EXPIRE_TIME; // Validate request headers for caching // --------------------------------------------------- // If-None-Match header should contain "*" or ETag. If so, then return // 304. String ifNoneMatch = request.getHeader("If-None-Match"); if (ifNoneMatch != null && matches(ifNoneMatch, eTag)) { response.setStatus(HttpServletResponse.SC_NOT_MODIFIED); response.setHeader("ETag", eTag); // Required in 304. response.setDateHeader("Expires", expires); // Postpone cache with 1 // week. return; } // If-Modified-Since header should be greater than LastModified. If so, // then return 304. // This header is ignored if any If-None-Match header is specified. long ifModifiedSince = request.getDateHeader("If-Modified-Since"); if (ifNoneMatch == null && ifModifiedSince != -1 && ifModifiedSince + 1000 > lastModified) { response.setStatus(HttpServletResponse.SC_NOT_MODIFIED); response.setHeader("ETag", eTag); // Required in 304. response.setDateHeader("Expires", expires); // Postpone cache with 1 // week. return; } // Validate request headers for resume // ---------------------------------------------------- // If-Match header should contain "*" or ETag. If not, then return 412. String ifMatch = request.getHeader("If-Match"); if (ifMatch != null && !matches(ifMatch, eTag)) { response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED); return; } // If-Unmodified-Since header should be greater than LastModified. If // not, then return 412. long ifUnmodifiedSince = request.getDateHeader("If-Unmodified-Since"); if (ifUnmodifiedSince != -1 && ifUnmodifiedSince + 1000 <= lastModified) { response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED); return; } // Validate and process range // ------------------------------------------------------------- // Prepare some variables. The full Range represents the complete file. Range full = new Range(0, length - 1, length); List<Range> ranges = new ArrayList<Range>(); // Validate and process Range and If-Range headers. String range = request.getHeader("Range"); if (range != null) { // Range header should match format "bytes=n-n,n-n,n-n...". If not, // then return 416. if (!range.matches("^bytes=\\d*-\\d*(,\\d*-\\d*)*$")) { response.setHeader("Content-Range", "bytes */" + length); // Required // in // 416. response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE); return; } // If-Range header should either match ETag or be greater then // LastModified. If not, // then return full file. String ifRange = request.getHeader("If-Range"); if (ifRange != null && !ifRange.equals(eTag)) { try { long ifRangeTime = request.getDateHeader("If-Range"); // Throws // IAE // if // invalid. if (ifRangeTime != -1 && ifRangeTime + 1000 < lastModified) { ranges.add(full); } } catch (IllegalArgumentException ignore) { ranges.add(full); } } // If any valid If-Range header, then process each part of byte // range. if (ranges.isEmpty()) { for (String part : range.substring(6).split(",")) { // Assuming a file with length of 100, the following // examples returns bytes at: // 50-80 (50 to 80), 40- (40 to length=100), -20 // (length-20=80 to length=100). long start = sublong(part, 0, part.indexOf("-")); long end = sublong(part, part.indexOf("-") + 1, part.length()); if (start == -1) { start = length - end; end = length - 1; } else if (end == -1 || end > length - 1) { end = length - 1; } // Check if Range is syntactically valid. If not, then // return 416. if (start > end) { response.setHeader("Content-Range", "bytes */" + length); // Required // in // 416. response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE); return; } // Add range. ranges.add(new Range(start, end, length)); } } } // Prepare and initialize response // -------------------------------------------------------- // Get content type by file name and set default GZIP support and // content disposition. String contentType = getServletContext().getMimeType(fileName); boolean acceptsGzip = false; String disposition = "inline"; // If content type is unknown, then set the default value. // For all content types, see: // http://www.w3schools.com/media/media_mimeref.asp // To add new content types, add new mime-mapping entry in web.xml. if (contentType == null) { contentType = "application/octet-stream"; } // If content type is text, then determine whether GZIP content encoding // is supported by // the browser and expand content type with the one and right character // encoding. if (contentType.startsWith("text")) { String acceptEncoding = request.getHeader("Accept-Encoding"); acceptsGzip = acceptEncoding != null && accepts(acceptEncoding, "gzip"); contentType += ";charset=UTF-8"; } // Else, expect for images, determine content disposition. If content // type is supported by // the browser, then set to inline, else attachment which will pop a // 'save as' dialogue. else if (!contentType.startsWith("image")) { String accept = request.getHeader("Accept"); disposition = accept != null && accepts(accept, contentType) ? "inline" : "attachment"; } // Initialize response. response.reset(); response.setBufferSize(DEFAULT_BUFFER_SIZE); response.setHeader("Content-Disposition", disposition + ";filename=\"" + fileName + "\""); response.setHeader("Accept-Ranges", "bytes"); response.setHeader("ETag", eTag); response.setDateHeader("Last-Modified", lastModified); response.setDateHeader("Expires", expires); // Send requested file (part(s)) to client // ------------------------------------------------ // Prepare streams. RandomAccessFile input = null; OutputStream output = null; try { // Open streams. input = new RandomAccessFile(file, "r"); output = response.getOutputStream(); if (ranges.isEmpty() || ranges.get(0) == full) { // Return full file. Range r = full; response.setContentType(contentType); response.setHeader("Content-Range", "bytes " + r.start + "-" + r.end + "/" + r.total); if (content) { if (acceptsGzip) { // The browser accepts GZIP, so GZIP the content. response.setHeader("Content-Encoding", "gzip"); output = new GZIPOutputStream(output, DEFAULT_BUFFER_SIZE); } else { // Content length is not directly predictable in case of // GZIP. // So only add it if there is no means of GZIP, else // browser will hang. response.setHeader("Content-Length", String.valueOf(r.length)); } // Copy full range. copy(input, output, r.start, r.length); } } else if (ranges.size() == 1) { // Return single part of file. Range r = ranges.get(0); response.setContentType(contentType); response.setHeader("Content-Range", "bytes " + r.start + "-" + r.end + "/" + r.total); response.setHeader("Content-Length", String.valueOf(r.length)); response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT); // 206. if (content) { // Copy single part range. copy(input, output, r.start, r.length); } } else { // Return multiple parts of file. response.setContentType("multipart/byteranges; boundary=" + MULTIPART_BOUNDARY); response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT); // 206. if (content) { // Cast back to ServletOutputStream to get the easy println // methods. ServletOutputStream sos = (ServletOutputStream) output; // Copy multi part range. for (Range r : ranges) { // Add multipart boundary and header fields for every // range. sos.println(); sos.println("--" + MULTIPART_BOUNDARY); sos.println("Content-Type: " + contentType); sos.println("Content-Range: bytes " + r.start + "-" + r.end + "/" + r.total); // Copy single part range of multi part range. copy(input, output, r.start, r.length); } // End with multipart boundary. sos.println(); sos.println("--" + MULTIPART_BOUNDARY + "--"); } } } finally { // Gently close streams. close(output); close(input); } }
From source file:org.openhab.ui.cometvisu.internal.servlet.CometVisuServlet.java
/** * Process the actual request.//from w w w .jav a 2s . c o m * * @param request * The request to be processed. * @param response * The response to be created. * @param content * Whether the request body should be written (GET) or not * (HEAD). * @throws IOException * If something fails at I/O level. * * @author BalusC * @link * http://balusc.blogspot.com/2009/02/fileservlet-supporting-resume-and * .html */ private void processStaticRequest(File file, HttpServletRequest request, HttpServletResponse response, boolean content) throws IOException { // Validate the requested file // ------------------------------------------------------------ if (file == null) { // Get requested file by path info. String requestedFile = request.getPathInfo(); // Check if file is actually supplied to the request URL. if (requestedFile == null) { // Do your thing if the file is not supplied to the request URL. // Throw an exception, or send 404, or show default/warning // page, or // just ignore it. response.sendError(HttpServletResponse.SC_NOT_FOUND); return; } // URL-decode the file name (might contain spaces and on) and // prepare // file object. file = new File(rootFolder, URLDecoder.decode(requestedFile, "UTF-8")); } if (file.equals(rootFolder) || (file.exists() && file.isDirectory())) { file = new File(file, "index.html"); } // Check if file actually exists in filesystem. if (!file.exists()) { // show installation hints if the CometVisu-Clients main index.html is requested but cannot be found if (file.getParentFile().equals(rootFolder) && (file.getName().equalsIgnoreCase("index.html") || file.getName().length() == 0)) { // looking for CometVisu clients index.html file String path = null; File folder = file.isDirectory() ? file : file.getParentFile(); if (folder.exists()) { File index = ClientInstaller.findClientRoot(folder, "index.html"); path = index.exists() ? index.getPath().replaceFirst(rootFolder.getPath() + "/", "") : null; } if (path != null) { // forward to position response.setStatus(HttpServletResponse.SC_MOVED_PERMANENTLY); response.setHeader("Location", path + "?" + request.getQueryString()); } else { showInstallationHint(request, response); } } else { response.sendError(HttpServletResponse.SC_NOT_FOUND); } return; } // Prepare some variables. The ETag is an unique identifier of the file. String fileName = file.getName(); long length = file.length(); long lastModified = file.lastModified(); String eTag = fileName + "_" + length + "_" + lastModified; long expires = System.currentTimeMillis() + DEFAULT_EXPIRE_TIME; // Validate request headers for caching // --------------------------------------------------- // If-None-Match header should contain "*" or ETag. If so, then return // 304. String ifNoneMatch = request.getHeader("If-None-Match"); if (ifNoneMatch != null && matches(ifNoneMatch, eTag)) { response.setStatus(HttpServletResponse.SC_NOT_MODIFIED); response.setHeader("ETag", eTag); // Required in 304. response.setDateHeader("Expires", expires); // Postpone cache with 1 // week. return; } // If-Modified-Since header should be greater than LastModified. If so, // then return 304. // This header is ignored if any If-None-Match header is specified. long ifModifiedSince = request.getDateHeader("If-Modified-Since"); if (ifNoneMatch == null && ifModifiedSince != -1 && ifModifiedSince + 1000 > lastModified) { response.setStatus(HttpServletResponse.SC_NOT_MODIFIED); response.setHeader("ETag", eTag); // Required in 304. response.setDateHeader("Expires", expires); // Postpone cache with 1 // week. return; } // Validate request headers for resume // ---------------------------------------------------- // If-Match header should contain "*" or ETag. If not, then return 412. String ifMatch = request.getHeader("If-Match"); if (ifMatch != null && !matches(ifMatch, eTag)) { response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED); return; } // If-Unmodified-Since header should be greater than LastModified. If // not, then return 412. long ifUnmodifiedSince = request.getDateHeader("If-Unmodified-Since"); if (ifUnmodifiedSince != -1 && ifUnmodifiedSince + 1000 <= lastModified) { response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED); return; } // Validate and process range // ------------------------------------------------------------- // Prepare some variables. The full Range represents the complete file. Range full = new Range(0, length - 1, length); List<Range> ranges = new ArrayList<Range>(); // Validate and process Range and If-Range headers. String range = request.getHeader("Range"); if (range != null) { // Range header should match format "bytes=n-n,n-n,n-n...". If not, // then return 416. if (!range.matches("^bytes=\\d*-\\d*(,\\d*-\\d*)*$")) { response.setHeader("Content-Range", "bytes */" + length); // Required // in // 416. response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE); return; } // If-Range header should either match ETag or be greater then // LastModified. If not, // then return full file. String ifRange = request.getHeader("If-Range"); if (ifRange != null && !ifRange.equals(eTag)) { try { long ifRangeTime = request.getDateHeader("If-Range"); // Throws // IAE // if // invalid. if (ifRangeTime != -1 && ifRangeTime + 1000 < lastModified) { ranges.add(full); } } catch (IllegalArgumentException ignore) { ranges.add(full); } } // If any valid If-Range header, then process each part of byte // range. if (ranges.isEmpty()) { for (String part : range.substring(6).split(",")) { // Assuming a file with length of 100, the following // examples returns bytes at: // 50-80 (50 to 80), 40- (40 to length=100), -20 // (length-20=80 to length=100). long start = sublong(part, 0, part.indexOf("-")); long end = sublong(part, part.indexOf("-") + 1, part.length()); if (start == -1) { start = length - end; end = length - 1; } else if (end == -1 || end > length - 1) { end = length - 1; } // Check if Range is syntactically valid. If not, then // return 416. if (start > end) { response.setHeader("Content-Range", "bytes */" + length); // Required // in // 416. response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE); return; } // Add range. ranges.add(new Range(start, end, length)); } } } // Prepare and initialize response // -------------------------------------------------------- // Get content type by file name and set default GZIP support and // content disposition. String contentType = getServletContext().getMimeType(fileName); boolean acceptsGzip = false; String disposition = "inline"; // If content type is unknown, then set the default value. // For all content types, see: // http://www.w3schools.com/media/media_mimeref.asp // To add new content types, add new mime-mapping entry in web.xml. if (contentType == null) { contentType = "application/octet-stream"; } // If content type is text, then determine whether GZIP content encoding // is supported by // the browser and expand content type with the one and right character // encoding. if (contentType.startsWith("text")) { String acceptEncoding = request.getHeader("Accept-Encoding"); acceptsGzip = acceptEncoding != null && accepts(acceptEncoding, "gzip"); contentType += ";charset=UTF-8"; } // Else, expect for images, determine content disposition. If content // type is supported by // the browser, then set to inline, else attachment which will pop a // 'save as' dialogue. else if (!contentType.startsWith("image")) { String accept = request.getHeader("Accept"); disposition = accept != null && accepts(accept, contentType) ? "inline" : "attachment"; } response.setBufferSize(DEFAULT_BUFFER_SIZE); response.setHeader("Content-Disposition", disposition + ";filename=\"" + fileName + "\""); response.setHeader("Accept-Ranges", "bytes"); response.setHeader("ETag", eTag); response.setDateHeader("Last-Modified", lastModified); response.setDateHeader("Expires", expires); // Send requested file (part(s)) to client // ------------------------------------------------ // Prepare streams. RandomAccessFile input = null; OutputStream output = null; try { // Open streams. input = new RandomAccessFile(file, "r"); output = response.getOutputStream(); if (ranges.isEmpty() || ranges.get(0) == full) { // Return full file. Range r = full; response.setContentType(contentType); response.setHeader("Content-Range", "bytes " + r.start + "-" + r.end + "/" + r.total); if (content) { if (acceptsGzip) { // The browser accepts GZIP, so GZIP the content. response.setHeader("Content-Encoding", "gzip"); output = new GZIPOutputStream(output, DEFAULT_BUFFER_SIZE); } else { // Content length is not directly predictable in case of // GZIP. // So only add it if there is no means of GZIP, else // browser will hang. response.setHeader("Content-Length", String.valueOf(r.length)); } // Copy full range. copy(input, output, r.start, r.length); } } else if (ranges.size() == 1) { // Return single part of file. Range r = ranges.get(0); response.setContentType(contentType); response.setHeader("Content-Range", "bytes " + r.start + "-" + r.end + "/" + r.total); response.setHeader("Content-Length", String.valueOf(r.length)); response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT); // 206. if (content) { // Copy single part range. copy(input, output, r.start, r.length); } } else { // Return multiple parts of file. response.setContentType("multipart/byteranges; boundary=" + MULTIPART_BOUNDARY); response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT); // 206. if (content) { // Cast back to ServletOutputStream to get the easy println // methods. ServletOutputStream sos = (ServletOutputStream) output; // Copy multi part range. for (Range r : ranges) { // Add multipart boundary and header fields for every // range. sos.println(); sos.println("--" + MULTIPART_BOUNDARY); sos.println("Content-Type: " + contentType); sos.println("Content-Range: bytes " + r.start + "-" + r.end + "/" + r.total); // Copy single part range of multi part range. copy(input, output, r.start, r.length); } // End with multipart boundary. sos.println(); sos.println("--" + MULTIPART_BOUNDARY + "--"); } } } finally { // Gently close streams. close(output); close(input); } }
From source file:org.sakaiproject.sdata.tool.JCRHandler.java
/** * Evaluate pre-conditions, based on the request, as per the http rfc. * * @param request// w w w . j a v a 2 s. c o m * @param response * @return * @throws IOException */ private boolean checkPreconditions(HttpServletRequest request, HttpServletResponse response, long lastModifiedTime, String currentEtag) throws IOException { lastModifiedTime = lastModifiedTime - (lastModifiedTime % 1000); long ifUnmodifiedSince = request.getDateHeader("if-unmodified-since"); if (ifUnmodifiedSince > 0 && (lastModifiedTime >= ifUnmodifiedSince)) { response.reset(); response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED); return false; } String ifMatch = request.getHeader("if-match"); if (ifMatch != null && ifMatch.indexOf(currentEtag) < 0) { // ifMatch was present, but the currentEtag didnt match response.reset(); response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED); return false; } String ifNoneMatch = request.getHeader("if-none-match"); if (ifNoneMatch != null && ifNoneMatch.indexOf(currentEtag) >= 0) { if ("GET|HEAD".indexOf(request.getMethod()) >= 0) { response.reset(); response.sendError(HttpServletResponse.SC_NOT_MODIFIED); } else { // ifMatch was present, but the currentEtag didnt match response.reset(); response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED); } return false; } long ifModifiedSince = request.getDateHeader("if-modified-since"); if ((ifModifiedSince > 0) && (lastModifiedTime <= ifModifiedSince)) { response.reset(); response.sendError(HttpServletResponse.SC_NOT_MODIFIED); return false; } return true; }