List of usage examples for org.springframework.http HttpHeaders CONTENT_RANGE
String CONTENT_RANGE
To view the source code for org.springframework.http HttpHeaders CONTENT_RANGE.
Click Source Link
From source file:com.github.zhanhb.ckfinder.download.PathPartial.java
/** * Serve the specified resource, optionally including the data content. * * @param request The servlet request we are processing * @param response The servlet response we are creating * @param content Should the content be included? * @param path the resource to serve//w w w .j a va2s. c o m * * @exception IOException if an input/output error occurs */ private void serveResource(HttpServletRequest request, HttpServletResponse response, boolean content, Path path) throws IOException, ServletException { ActionContext context = new ActionContext().put(HttpServletRequest.class, request) .put(HttpServletResponse.class, response).put(ServletContext.class, request.getServletContext()) .put(Path.class, path); if (path == null) { notFound.handle(context); return; } BasicFileAttributes attr; try { attr = Files.readAttributes(path, BasicFileAttributes.class); } catch (IOException ex) { notFound.handle(context); return; } context.put(BasicFileAttributes.class, attr); boolean isError = response.getStatus() >= HttpServletResponse.SC_BAD_REQUEST; // Check if the conditions specified in the optional If headers are // satisfied. // Checking If headers boolean included = (request.getAttribute(RequestDispatcher.INCLUDE_CONTEXT_PATH) != null); String etag = this.eTag.getValue(context); if (!included && !isError && !checkIfHeaders(request, response, attr, etag)) { return; } // Find content type. String contentType = contentTypeResolver.getValue(context); // Get content length long contentLength = attr.size(); // Special case for zero length files, which would cause a // (silent) ISE boolean serveContent = content && contentLength != 0; Range[] ranges = null; if (!isError) { if (useAcceptRanges) { // Accept ranges header response.setHeader(HttpHeaders.ACCEPT_RANGES, "bytes"); } // Parse range specifier ranges = serveContent ? parseRange(request, response, attr, etag) : FULL; // ETag header response.setHeader(HttpHeaders.ETAG, etag); // Last-Modified header response.setDateHeader(HttpHeaders.LAST_MODIFIED, attr.lastModifiedTime().toMillis()); } ServletOutputStream ostream = null; if (serveContent) { ostream = response.getOutputStream(); } String disposition = contentDisposition.getValue(context); if (disposition != null) { response.setHeader(HttpHeaders.CONTENT_DISPOSITION, disposition); } // Check to see if a Filter, Valve of wrapper has written some content. // If it has, disable range requests and setting of a content length // since neither can be done reliably. if (isError || ranges == FULL) { // Set the appropriate output headers if (contentType != null) { log.debug("serveFile: contentType='{}'", contentType); response.setContentType(contentType); } if (contentLength >= 0) { setContentLengthLong(response, contentLength); } // Copy the input stream to our output stream (if requested) if (serveContent) { log.trace("Serving bytes"); Files.copy(path, ostream); } } else if (ranges != null && ranges.length != 0) { // Partial content response. response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT); if (ranges.length == 1) { Range range = ranges[0]; response.addHeader(HttpHeaders.CONTENT_RANGE, range.toString()); long length = range.end - range.start + 1; setContentLengthLong(response, length); if (contentType != null) { log.debug("serveFile: contentType='{}'", contentType); response.setContentType(contentType); } if (serveContent) { try (InputStream stream = Files.newInputStream(path)) { copyRange(stream, ostream, range, new byte[Math.min((int) length, 8192)]); } } } else { response.setContentType("multipart/byteranges; boundary=" + MIME_SEPARATION); if (serveContent) { copy(path, ostream, ranges, contentType, new byte[Math.min((int) contentLength, 8192)]); } } } }
From source file:com.github.zhanhb.ckfinder.download.PathPartial.java
/** * Parse the range header./*from w w w . jav a 2s . c o m*/ * * @param request The servlet request we are processing * @param response The servlet response we are creating * @param attr File attributes * @param etag ETag of the entity * @return array of ranges */ @Nullable @SuppressWarnings("ReturnOfCollectionOrArrayField") private Range[] parseRange(HttpServletRequest request, HttpServletResponse response, BasicFileAttributes attr, String etag) throws IOException { // Checking If-Range String headerValue = request.getHeader(HttpHeaders.IF_RANGE); if (headerValue != null) { long headerValueTime = -1; try { headerValueTime = request.getDateHeader(HttpHeaders.IF_RANGE); } catch (IllegalArgumentException e) { // Ignore } // If the ETag the client gave does not match the entity // eTag, then the entire entity is returned. if (headerValueTime == -1 && !headerValue.trim().equals(etag) || attr.lastModifiedTime().toMillis() > headerValueTime + 1000) { // If the timestamp of the entity the client got is older than // the last modification date of the entity, the entire entity // is returned. return FULL; } } long fileLength = attr.size(); if (fileLength == 0) { return FULL; } // Retrieving the range header (if any is specified String rangeHeader = request.getHeader(HttpHeaders.RANGE); if (rangeHeader == null) { return FULL; } // bytes is the only range unit supported (and I don't see the point // of adding new ones). if (!rangeHeader.startsWith("bytes=")) { return FULL; } // List which will contain all the ranges which are successfully // parsed. List<Range> result = new ArrayList<>(4); // Parsing the range list // "bytes=".length() = 6 for (int index, last = 6;; last = index + 1) { index = rangeHeader.indexOf(',', last); boolean isLast = index == -1; final String rangeDefinition = (isLast ? rangeHeader.substring(last) : rangeHeader.substring(last, index)).trim(); final int dashPos = rangeDefinition.indexOf('-'); if (dashPos == -1) { break; } final Range currentRange = new Range(fileLength); try { if (dashPos == 0) { final long offset = Long.parseLong(rangeDefinition); if (offset == 0) { // -0, --0 break; } currentRange.start = Math.max(fileLength + offset, 0); } else { currentRange.start = Long.parseLong(rangeDefinition.substring(0, dashPos)); if (dashPos < rangeDefinition.length() - 1) { currentRange.end = Long .parseLong(rangeDefinition.substring(dashPos + 1, rangeDefinition.length())); } } } catch (NumberFormatException e) { break; } if (!currentRange.validate()) { break; } result.add(currentRange); if (isLast) { int size = result.size(); if (size == 0) { break; } return result.toArray(new Range[size]); } } response.addHeader(HttpHeaders.CONTENT_RANGE, "bytes */" + fileLength); response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE); return null; }
From source file:bjerne.gallery.controller.GalleryController.java
/** * Method used to return the binary of a gallery file ( * {@link GalleryFile#getActualFile()} ). This method handles 304 redirects * (if file has not changed) and range headers if requested by browser. The * range parts is particularly important for videos. The correct response * status is set depending on the circumstances. * <p>// w w w .j av a 2 s. c om * NOTE: the range logic should NOT be considered a complete implementation * - it's a bare minimum for making requests for byte ranges work. * * @param request * Request * @param galleryFile * Gallery file * @return The binary of the gallery file, or a 304 redirect, or a part of * the file. * @throws IOException * If there is an issue accessing the binary file. */ private ResponseEntity<InputStreamResource> returnResource(WebRequest request, GalleryFile galleryFile) throws IOException { LOG.debug("Entering returnResource()"); if (request.checkNotModified(galleryFile.getActualFile().lastModified())) { return null; } File file = galleryFile.getActualFile(); String contentType = galleryFile.getContentType(); String rangeHeader = request.getHeader(HttpHeaders.RANGE); long[] ranges = getRangesFromHeader(rangeHeader); long startPosition = ranges[0]; long fileTotalSize = file.length(); long endPosition = ranges[1] != 0 ? ranges[1] : fileTotalSize - 1; long contentLength = endPosition - startPosition + 1; LOG.debug("contentLength: {}, file length: {}", contentLength, fileTotalSize); LOG.debug("Returning resource {} as inputstream. Start position: {}", file.getCanonicalPath(), startPosition); InputStream boundedInputStream = new BoundedInputStream(new FileInputStream(file), endPosition + 1); InputStream is = new BufferedInputStream(boundedInputStream, 65536); InputStreamResource inputStreamResource = new InputStreamResource(is); HttpHeaders responseHeaders = new HttpHeaders(); responseHeaders.setContentLength(contentLength); responseHeaders.setContentType(MediaType.valueOf(contentType)); responseHeaders.add(HttpHeaders.ACCEPT_RANGES, "bytes"); if (StringUtils.isNotBlank(rangeHeader)) { is.skip(startPosition); String contentRangeResponseHeader = "bytes " + startPosition + "-" + endPosition + "/" + fileTotalSize; responseHeaders.add(HttpHeaders.CONTENT_RANGE, contentRangeResponseHeader); LOG.debug("{} was not null but {}. Adding header {} to response: {}", HttpHeaders.RANGE, rangeHeader, HttpHeaders.CONTENT_RANGE, contentRangeResponseHeader); } HttpStatus status = (startPosition == 0 && contentLength == fileTotalSize) ? HttpStatus.OK : HttpStatus.PARTIAL_CONTENT; LOG.debug("Returning {}. Status: {}, content-type: {}, {}: {}, contentLength: {}", file, status, contentType, HttpHeaders.CONTENT_RANGE, responseHeaders.get(HttpHeaders.CONTENT_RANGE), contentLength); return new ResponseEntity<InputStreamResource>(inputStreamResource, responseHeaders, status); }
From source file:com.github.zhanhb.ckfinder.download.PathPartial.java
/** * Copy the contents of the specified input stream to the specified output * stream, and ensure that both streams are closed before returning (even in * the face of an exception).// www . j a va 2 s . com * * @param path The cache entry for the source resource * @param ostream The output stream to write to * @param ranges Enumeration of the ranges the client wanted to retrieve * @param contentType Content type of the resource * @param buffer buffer to copy the resource * @exception IOException if an input/output error occurs */ private void copy(Path path, ServletOutputStream ostream, Range[] ranges, String contentType, byte[] buffer) throws IOException { IOException exception = null; for (Range currentRange : ranges) { try (InputStream stream = Files.newInputStream(path)) { // Writing MIME header. ostream.println(); ostream.println("--" + MIME_SEPARATION); if (contentType != null) { ostream.println(HttpHeaders.CONTENT_TYPE + ": " + contentType); } ostream.println(HttpHeaders.CONTENT_RANGE + ": " + currentRange); ostream.println(); // Printing content copyRange(stream, ostream, currentRange, buffer); } catch (IOException ex) { exception = ex; } } ostream.println(); ostream.print("--" + MIME_SEPARATION + "--"); if (exception != null) { throw exception; } }