List of usage examples for javax.servlet.http HttpServletRequest getDateHeader
public long getDateHeader(String name);
long value that represents a Date object. From source file:org.shredzone.cilla.view.AbstractView.java
/** * Checks that the request sent an "If-Modified-Since" header, and the date matches * the given date.//ww w . j a va 2 s.c o m * * @param req * {@link HttpServletRequest} to use * @param date * {@link Date} to check * @return {@code true}: Resource has not changed since it was last delivered */ protected boolean isNotModifiedSince(HttpServletRequest req, Date date) { long modifiedSinceTs = -1; try { modifiedSinceTs = req.getDateHeader("If-Modified-Since"); } catch (IllegalArgumentException ex) { // As stated in RFC2616 Sec. 14.25, an invalid date will just be ignored. } return (modifiedSinceTs >= 0 && (modifiedSinceTs / 1000) == (date.getTime() / 1000)); }
From source file:org.sakaiproject.nakamura.files.pool.StreamHelper.java
/** * Returns <code>true</code> if the request has a <code>If-Modified-Since</code> header * whose date value is later than the last modification time given as * <code>modifTime</code>.//from ww w .j ava2 s .co m * * @param request * The <code>ComponentRequest</code> checked for the * <code>If-Modified-Since</code> header. * @param modifTime * The last modification time to compare the header to. * @return <code>true</code> if the <code>modifTime</code> is less than or equal to the * time of the <code>If-Modified-Since</code> header. */ private boolean unmodified(HttpServletRequest request, long modifTime) { if (modifTime > 0) { long modTime = modifTime / 1000; // seconds long ims = request.getDateHeader(HEADER_IF_MODIFIED_SINCE) / 1000; return modTime <= ims; } // we have no modification time value, assume modified return false; }
From source file:org.mycore.common.content.util.MCRServletContentHelper.java
/** * Parses and validates the range header. * This method ensures that all ranges are in ascending order and non-overlapping, so we can use a single * InputStream.// w ww. ja va 2s. c om */ private static ArrayList<Range> parseRange(final HttpServletRequest request, final HttpServletResponse response, final MCRContent content) throws IOException { // Checking if range is still valid (lastModified) final String headerValue = request.getHeader("If-Range"); if (headerValue != null) { long headerValueTime = -1L; try { headerValueTime = request.getDateHeader("If-Range"); } catch (final IllegalArgumentException e) { // Ignore } final String eTag = content.getETag(); final long lastModified = content.lastModified(); if (headerValueTime == -1L) { // If the content changed, the complete content is served. if (!eTag.equals(headerValue.trim())) { return FULL; } } else { //add one second buffer to check if the content was modified. if (lastModified > headerValueTime + 1000) { return FULL; } } } final long fileLength = content.length(); if (fileLength <= 0) { return null; } String rangeHeader = request.getHeader("Range"); if (rangeHeader == null) { return null; } // We operate on byte level only String rangeUnit = "bytes"; if (!rangeHeader.startsWith(rangeUnit)) { response.addHeader("Content-Range", "bytes */" + fileLength); response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE); return null; } rangeHeader = rangeHeader.substring(rangeUnit.length() + 1); final ArrayList<Range> result = new ArrayList<>(); final StringTokenizer commaTokenizer = new StringTokenizer(rangeHeader, ","); // Parsing the range list long lastByte = 0; while (commaTokenizer.hasMoreTokens()) { final String rangeDefinition = commaTokenizer.nextToken().trim(); final Range currentRange = new Range(); currentRange.length = fileLength; final int dashPos = rangeDefinition.indexOf('-'); if (dashPos == -1) { response.addHeader("Content-Range", "bytes */" + fileLength); response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE); return null; } if (dashPos == 0) { try { //offset is negative final long offset = Long.parseLong(rangeDefinition); currentRange.start = fileLength + offset; currentRange.end = fileLength - 1; } catch (final NumberFormatException e) { response.addHeader("Content-Range", "bytes */" + fileLength); response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE); return null; } } else { try { currentRange.start = Long.parseLong(rangeDefinition.substring(0, dashPos)); if (dashPos < rangeDefinition.length() - 1) { currentRange.end = Long .parseLong(rangeDefinition.substring(dashPos + 1, rangeDefinition.length())); } else { currentRange.end = fileLength - 1; } } catch (final NumberFormatException e) { response.addHeader("Content-Range", "bytes */" + fileLength); response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE); return null; } } if (!currentRange.validate() || lastByte > currentRange.start) { response.addHeader("Content-Range", "bytes */" + fileLength); response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE); return null; } lastByte = currentRange.end; result.add(currentRange); } return result; }
From source file:org.kuali.mobility.icons.controllers.WebIconsController.java
/** * Get the icon matching all the criteria of the request and write it the the HttpServletResponse. * * @param iconName Name of the icon to get. * @param theme The theme to get the icon in. * @param size Size to get the icon in. * @param request The HttpServletRequest being handled. * @param response The HttpServletResponse that will reply. * @throws IOException Thrown if there is an exception creating the icon or writing it to the response. *//*from ww w . j a v a 2s.c o m*/ private void writeIconToHttpResponse(String iconName, String theme, int size, HttpServletRequest request, HttpServletResponse response) throws IOException { long dateChanged = request.getDateHeader("If-Modified-Since") / 1000; File imageFile = iconService.getImageFile(iconName, theme, size); long mediaChanged = imageFile.lastModified() / 1000; if (dateChanged == mediaChanged) { response.setStatus(HttpServletResponse.SC_NOT_MODIFIED); return; } response.setContentType("image/png"); InputStream imageInput = new FileInputStream(imageFile); response.setDateHeader("Last-Modified", imageFile.lastModified()); int bytesWritten = IOUtils.copy(imageInput, response.getOutputStream()); response.setContentLength(bytesWritten); response.flushBuffer(); }
From source file:org.eclipse.smarthome.ui.icon.internal.IconServlet.java
@Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { if (req.getDateHeader("If-Modified-Since") > startupTime) { resp.setStatus(304);// w w w.ja va 2 s .co m return; } String category = getCategory(req); Format format = getFormat(req); String state = getState(req); String iconSetId = getIconSetId(req); IconProvider topProvider = null; int maxPrio = Integer.MIN_VALUE; for (IconProvider provider : iconProvider) { Integer prio = provider.hasIcon(category, iconSetId, format); if (prio != null && prio > maxPrio) { maxPrio = prio; topProvider = provider; } } if (topProvider != null) { if (format.equals(Format.SVG)) { resp.setContentType("image/svg+xml"); } else { resp.setContentType("image/png"); } resp.setDateHeader("Last-Modified", new Date().getTime()); ServletOutputStream os = resp.getOutputStream(); try (InputStream is = topProvider.getIcon(category, iconSetId, state, format)) { IOUtils.copy(is, os); resp.flushBuffer(); } catch (IOException e) { logger.error("Failed sending the icon byte stream as a response: {}", e.getMessage()); resp.sendError(500, e.getMessage()); } } else { resp.sendError(404); } }
From source file:nl.strohalm.cyclos.servlets.ImageByNameServlet.java
/** * Write the image file to the response//from w w w. j av a2 s . c o m */ private void write(final HttpServletRequest request, final HttpServletResponse response, final File file, final ImageType type) throws IOException { final long ifModifiedSince = request.getDateHeader("If-Modified-Since"); if (ifModifiedSince > 0 && file.lastModified() <= ifModifiedSince) { // The contents have not changed response.setStatus(HttpServletResponse.SC_NOT_MODIFIED); return; } // The contents are modified, or not in browser's cache. Render it if (type != null) { response.setContentType(type.getContentType()); } responseHelper.writeFile(response, file); response.flushBuffer(); }
From source file:ca.intelliware.ihtsdo.mlds.web.rest.MemberResource.java
private ResponseEntity<?> downloadFile(HttpServletRequest request, File file) throws SQLException, IOException { if (file == null) { return new ResponseEntity<>(HttpStatus.NO_CONTENT); } else if (file.getLastUpdated() != null) { long ifModifiedSince = request.getDateHeader("If-Modified-Since"); long lastUpdatedSecondsFloor = file.getLastUpdated().getMillis() / 1000 * 1000; if (ifModifiedSince != -1 && lastUpdatedSecondsFloor <= ifModifiedSince) { return new ResponseEntity<>(HttpStatus.NOT_MODIFIED); }/*from w ww .j a v a2 s. co m*/ } HttpHeaders httpHeaders = new HttpHeaders(); httpHeaders.setContentType(MediaType.valueOf(file.getMimetype())); httpHeaders.setContentLength(file.getContent().length()); httpHeaders.setContentDispositionFormData("file", file.getFilename()); if (file.getLastUpdated() != null) { httpHeaders.setLastModified(file.getLastUpdated().getMillis()); } byte[] byteArray = IOUtils.toByteArray(file.getContent().getBinaryStream()); org.springframework.core.io.Resource contents = new ByteArrayResource(byteArray); return new ResponseEntity<org.springframework.core.io.Resource>(contents, httpHeaders, HttpStatus.OK); }
From source file:httpUtils.HttpUtils.java
/** * Parse the request headers, build the response, stream back file * @param request/* w w w .j ava2s.c om*/ * @param response * @param dataStream * @param fileLength * @param fileName * @param fileLastModified * @param contentType * @return */ private static HttpServletResponse getFileAsStream(HttpServletRequest request, HttpServletResponse response, InputStream dataStream, long fileLength, String fileName, long fileLastModified, String contentType) { if (dataStream == null) { response.setStatus(HttpServletResponse.SC_NOT_FOUND); return response; } if (StringUtils.isEmpty(fileName) || fileLastModified == 0L) { response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); return response; } String ifNoneMatch = request.getHeader("If-None-Match"); if (ifNoneMatch != null && matches(ifNoneMatch, fileName)) { response.setHeader("ETag", fileName); response.setStatus(HttpServletResponse.SC_NOT_MODIFIED); return response; } long ifModifiedSince = request.getDateHeader("If-Modified-Since"); if (ifNoneMatch == null && ifModifiedSince != -1 && ifModifiedSince + 1000 > fileLastModified) { response.setHeader("ETag", fileName); response.setStatus(HttpServletResponse.SC_NOT_MODIFIED); return response; } String ifMatch = request.getHeader("If-Match"); if (ifMatch != null && !matches(ifMatch, fileName)) { response.setStatus(HttpServletResponse.SC_PRECONDITION_FAILED); return response; } long ifUnmodifiedSince = request.getDateHeader("If-Unmodified-Since"); if (ifUnmodifiedSince != -1 && ifUnmodifiedSince + 1000 <= fileLastModified) { response.setStatus(HttpServletResponse.SC_PRECONDITION_FAILED); return response; } Range full = new Range(0, fileLength - 1, fileLength); List<Range> ranges = new ArrayList<Range>(); String range = request.getHeader("Range"); if (range != null) { if (!range.matches("^bytes=\\d*-\\d*(,\\d*-\\d*)*$")) { response.setHeader("Content-Range", "bytes */" + fileLength); response.setStatus(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE); return response; } String ifRange = request.getHeader("If-Range"); if (ifRange != null && !ifRange.equals(fileName)) { try { long ifRangeTime = request.getDateHeader("If-Range"); if (ifRangeTime != -1) { ranges.add(full); } } catch (IllegalArgumentException ignore) { ranges.add(full); } } 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 = fileLength - end; end = fileLength - 1; } else if (end == -1 || end > fileLength - 1) { end = fileLength - 1; } // Check if Range is syntactically valid. If not, then // return 416. if (start > end) { response.setHeader("Content-Range", "bytes */" + fileLength); // Required // in // 416. response.setStatus(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE); return response; } // Add range. ranges.add(new Range(start, end, fileLength)); } } } // Get content type by file name and set content disposition. 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"; } else if (!contentType.startsWith("image")) { // 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. String accept = request.getHeader("Accept"); disposition = accept != null && accepts(accept, contentType) ? "inline" : "attachment"; } // Initialize response. response.reset(); response.setBufferSize(HttpUtils.DEFAULT_BUFFER_SIZE); response.setHeader("Content-Disposition", disposition + ";filename=\"" + fileName + "\""); response.setHeader("Accept-Ranges", "bytes"); response.setHeader("ETag", fileName); response.setDateHeader("Last-Modified", fileLastModified); response.setDateHeader("Expires", System.currentTimeMillis() + HttpUtils.DEFAULT_EXPIRE_TIME); // Send requested file (part(s)) to client // ------------------------------------------------ // Prepare streams. InputStream input = null; OutputStream output = null; try { // Open streams. input = new BufferedInputStream(dataStream); 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); response.setHeader("Content-Length", String.valueOf(r.length)); copy(input, output, fileLength, 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. // Copy single part range. copy(input, output, fileLength, r.start, r.length); } else { // Return multiple parts of file. response.setContentType("multipart/byteranges; boundary=" + HttpUtils.MULTIPART_BOUNDARY); response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT); // 206. // 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("--" + HttpUtils.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, fileLength, r.start, r.length); } // End with multipart boundary. sos.println(); sos.println("--" + HttpUtils.MULTIPART_BOUNDARY + "--"); } } catch (Exception e) { log.error("get file as stream failed", e); } finally { // Gently close streams. close(output); close(input); close(dataStream); } return response; }
From source file:net.duckling.ddl.web.controller.file.BaseAttachController.java
private boolean isModified(MetaInfo meta, HttpServletRequest request) { long browserModifyTime = request.getDateHeader("If-Modified-Since"); try {/*from w ww .j a v a 2s. c om*/ return (browserModifyTime != meta.lastUpdate.getTime()); } catch (Exception e) { return true; } }
From source file:com.astamuse.asta4d.web.builtin.StaticResourceHandler.java
private long retrieveClientCachedTime(HttpServletRequest request) { try {/*from w w w . j av a 2 s . c o m*/ long time = request.getDateHeader("If-Modified-Since"); return DateTimeZone.getDefault().convertLocalToUTC(time, false); } catch (Exception e) { logger.debug("retrieve If-Modified-Since failed", e); return -1; } }