List of usage examples for javax.servlet ServletOutputStream println
public void println() throws IOException
From source file:org.apache.jena.fuseki.servlets.ResponseJson.java
private static void output(HttpAction action, String contentType, String charset, OutputContent proc) { try {/*w ww.ja va2 s . com*/ setHttpResponse(action.request, action.response, contentType, charset); action.response.setStatus(HttpSC.OK_200); ServletOutputStream out = action.response.getOutputStream(); try { proc.output(out); out.flush(); } catch (QueryCancelledException ex) { // Bother. Status code 200 already sent. xlog.info(format("[%d] Query Cancelled - results truncated (but 200 already sent)", action.id)); out.println(); out.println("## Query cancelled due to timeout during execution ##"); out.println("## **** Incomplete results **** ##"); out.flush(); // No point raising an exception - 200 was sent already. //errorOccurred(ex) ; } // Includes client gone. } catch (IOException ex) { ServletOps.errorOccurred(ex); } // Do not call httpResponse.flushBuffer(); here - Jetty closes the stream if it is a gzip stream // then the JSON callback closing details can't be added. }
From source file:org.apache.jena.fuseki.servlets.ResponseResultSet.java
private static void output(HttpAction action, String contentType, String charset, OutputContent proc) { try {//from w ww.ja va 2 s .co m setHttpResponse(action.request, action.response, contentType, charset); action.response.setStatus(HttpSC.OK_200); ServletOutputStream out = action.response.getOutputStream(); try { proc.output(out); out.flush(); } catch (QueryCancelledException ex) { // Bother. Status code 200 already sent. slog.info(format("[%d] Query Cancelled - results truncated (but 200 already sent)", action.id)); out.println(); out.println("## Query cancelled due to timeout during execution ##"); out.println("## **** Incomplete results **** ##"); out.flush(); // No point raising an exception - 200 was sent already. //errorOccurred(ex) ; } // Includes client gone. } catch (IOException ex) { errorOccurred(ex); } // Do not call httpResponse.flushBuffer(); here - Jetty closes the stream if it is a gzip stream // then the JSON callback closing details can't be added. }
From source file:httpUtils.HttpUtils.java
/** * Parse the request headers, build the response, stream back file * @param request/* ww w . jav a2 s . com*/ * @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:uk.ac.ebi.fgpt.lode.servlet.ExplorerServlet.java
@RequestMapping(produces = "application/rdf+xml") public @ResponseBody void describeResourceAsXml(@RequestParam(value = "uri", required = true) String uri, HttpServletResponse response) throws IOException, LodeException { if (uri != null && uri.length() > 0) { String query = "DESCRIBE <" + URI.create(uri) + ">"; response.setContentType("application/rdf+xml"); ServletOutputStream out = response.getOutputStream(); out.println(); out.println();/*from w w w. j a va 2 s . com*/ getSparqlService().query(query, "RDF/XML", false, out); out.close(); } else { } }
From source file:uk.ac.ebi.fgpt.lode.servlet.ExplorerServlet.java
@RequestMapping(produces = "application/rdf+n3") public @ResponseBody void describeResourceAsN3(@RequestParam(value = "uri", required = true) String uri, HttpServletResponse response) throws IOException, LodeException { if (uri != null && uri.length() > 0) { String query = "DESCRIBE <" + URI.create(uri) + ">"; log.trace("querying for graph rdf+n3"); response.setContentType("application/rdf+n3"); ServletOutputStream out = response.getOutputStream(); out.println(); out.println();// w ww . j ava 2 s. c om getSparqlService().query(query, "N3", false, out); out.close(); } else { handleBadUriException(new Exception("Malformed or empty URI request: " + uri)); } }
From source file:uk.ac.ebi.fgpt.lode.servlet.ExplorerServlet.java
@RequestMapping(produces = "application/rdf+json") public @ResponseBody void describeResourceAsJson(@RequestParam(value = "uri", required = true) String uri, HttpServletResponse response) throws IOException, LodeException { if (uri != null && uri.length() > 0) { String query = "DESCRIBE <" + URI.create(uri) + ">"; log.trace("querying for graph rdf+n3"); response.setContentType("application/rdf+json"); ServletOutputStream out = response.getOutputStream(); out.println(); out.println();// w w w. j a v a2 s . co m getSparqlService().query(query, "JSON-LD", false, out); out.close(); } else { handleBadUriException(new Exception("Malformed or empty URI request: " + uri)); } }
From source file:org.mycore.common.content.util.MCRServletContentHelper.java
/** * Consumes the content and writes it to the ServletOutputStream. * * @param content The MCRContent resource to serve * @param out The outputBufferSize stream to write to * @param ranges Enumeration of the ranges in ascending non overlapping order the client wanted to retrieve * @param contentType Content type of the resource *//*from w w w . ja va 2 s . c om*/ private static void copy(final MCRContent content, final ServletOutputStream out, final Iterator<Range> ranges, final String contentType, final int inputBufferSize, final int outputBufferSize) throws IOException { IOException exception = null; long lastByte = 0; try (final InputStream resourceInputStream = content.getInputStream(); final InputStream in = isInputStreamBuffered(resourceInputStream, content) ? resourceInputStream : new BufferedInputStream(resourceInputStream, inputBufferSize)) { endCurrentTransaction(); while (exception == null && ranges.hasNext()) { final Range currentRange = ranges.next(); // Writing MIME header. out.println(); out.println("--" + MIME_BOUNDARY); if (contentType != null) { out.println("Content-Type: " + contentType); } out.println("Content-Range: bytes " + currentRange.start + "-" + currentRange.end + "/" + currentRange.length); out.println(); // Printing content exception = copyRange(in, out, lastByte, currentRange.start, currentRange.end, outputBufferSize); lastByte = currentRange.end; } } out.println(); out.print("--" + MIME_BOUNDARY + "--"); // Rethrow any exception that has occurred if (exception != null) { throw exception; } }
From source file:org.apache.jena.fuseki.ctl.ActionStats.java
private void statsTxt(HttpServletResponse resp, DataAccessPointRegistry registry) throws IOException { ServletOutputStream out = resp.getOutputStream(); resp.setContentType(contentTypeTextPlain); resp.setCharacterEncoding(charsetUTF8); Iterator<String> iter = registry.keys().iterator(); while (iter.hasNext()) { String ds = iter.next();/*from w w w. ja v a2 s . co m*/ DataAccessPoint desc = registry.get(ds); statsTxt(out, desc); if (iter.hasNext()) out.println(); } out.flush(); }
From source file:net.dorokhov.pony.web.server.common.StreamingViewRenderer.java
@Override protected void renderMergedOutputModel(Map objectMap, HttpServletRequest request, HttpServletResponse response) throws Exception { InputStream dataStream = (InputStream) objectMap.get(DownloadConstants.INPUT_STREAM); if (dataStream == null) { response.sendError(HttpServletResponse.SC_NOT_FOUND); return;//w w w . j a va 2 s .c om } long length = (Long) objectMap.get(DownloadConstants.CONTENT_LENGTH); String fileName = (String) objectMap.get(DownloadConstants.FILENAME); Date lastModifiedObj = (Date) objectMap.get(DownloadConstants.LAST_MODIFIED); if (StringUtils.isEmpty(fileName) || lastModifiedObj == null) { response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); return; } long lastModified = lastModifiedObj.getTime(); String contentType = (String) objectMap.get(DownloadConstants.CONTENT_TYPE); // 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, fileName)) { response.setHeader("ETag", fileName); // Required in 304. response.sendError(HttpServletResponse.SC_NOT_MODIFIED); 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.setHeader("ETag", fileName); // Required in 304. response.sendError(HttpServletResponse.SC_NOT_MODIFIED); 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, fileName)) { 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<>(); // 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; } String ifRange = request.getHeader("If-Range"); if (ifRange != null && !ifRange.equals(fileName)) { try { long ifRangeTime = request.getDateHeader("If-Range"); // Throws IAE if invalid. if (ifRangeTime != -1) { 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 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(DEFAULT_BUFFER_SIZE); response.setHeader("Content-Disposition", disposition + ";filename=\"" + fileName + "\""); response.setHeader("Accept-Ranges", "bytes"); response.setHeader("ETag", fileName); response.setDateHeader("Last-Modified", lastModified); response.setDateHeader("Expires", System.currentTimeMillis() + 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. response.setContentType(contentType); response.setHeader("Content-Range", "bytes " + full.start + "-" + full.end + "/" + full.total); response.setHeader("Content-Length", String.valueOf(full.length)); copy(input, output, length, full.start, full.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, length, r.start, r.length); } else { // Return multiple parts of file. response.setContentType("multipart/byteranges; boundary=" + 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("--" + 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, length, r.start, r.length); } // End with multipart boundary. sos.println(); sos.println("--" + MULTIPART_BOUNDARY + "--"); } } finally { // Gently close streams. close(output); close(input); close(dataStream); } }
From source file:com.swingtech.apps.filemgmt.controller.StreamingViewRenderer.java
@Override protected void renderMergedOutputModel(Map objectMap, HttpServletRequest request, HttpServletResponse response) throws Exception { InputStream dataStream = (InputStream) objectMap.get(DownloadConstants.INPUT_STREAM); if (dataStream == null) { response.sendError(HttpServletResponse.SC_NOT_FOUND); return;//from ww w . j a v a2 s .c o m } long length = (Long) objectMap.get(DownloadConstants.CONTENT_LENGTH); String fileName = (String) objectMap.get(DownloadConstants.FILENAME); Date lastModifiedObj = (Date) objectMap.get(DownloadConstants.LAST_MODIFIED); if (StringUtils.isEmpty(fileName) || lastModifiedObj == null) { response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); return; } long lastModified = lastModifiedObj.getTime(); String contentType = (String) objectMap.get(DownloadConstants.CONTENT_TYPE); // 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 && HttpUtils.matches(ifNoneMatch, fileName)) { response.setHeader("ETag", fileName); // Required in 304. response.sendError(HttpServletResponse.SC_NOT_MODIFIED); 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.setHeader("ETag", fileName); // Required in 304. response.sendError(HttpServletResponse.SC_NOT_MODIFIED); 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 && !HttpUtils.matches(ifMatch, fileName)) { 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; } String ifRange = request.getHeader("If-Range"); if (ifRange != null && !ifRange.equals(fileName)) { try { long ifRangeTime = request.getDateHeader("If-Range"); // Throws // IAE // if // invalid. if (ifRangeTime != -1) { 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 = StringUtils.sublong(part, 0, part.indexOf("-")); long end = StringUtils.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 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 && HttpUtils.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", fileName); response.setDateHeader("Last-Modified", lastModified); response.setDateHeader("Expires", System.currentTimeMillis() + 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, length, 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, length, r.start, r.length); } else { // Return multiple parts of file. response.setContentType("multipart/byteranges; boundary=" + 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("--" + 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, length, r.start, r.length); } // End with multipart boundary. sos.println(); sos.println("--" + MULTIPART_BOUNDARY + "--"); } } finally { // Gently close streams. close(output); close(input); close(dataStream); } }