Example usage for javax.servlet.http HttpServletResponse SC_REQUESTED_RANGE_NOT_SATISFIABLE

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Prototype

int SC_REQUESTED_RANGE_NOT_SATISFIABLE

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Document

Status code (416) indicating that the server cannot serve the requested byte range.

Usage

From source file:org.dspace.app.rest.utils.MultipartFileSenderTest.java

/**
 * Test with a unvalid Range header, should return status 416
 *
 * @throws Exception/*from   w  ww.  j a  v  a  2 s . c  om*/
 */
@Test
public void testInvalidRange() throws Exception {
    MultipartFileSender multipartFileSender = MultipartFileSender.fromInputStream(is).with(requestWrapper)
            .with(responseWrapper).withFileName(fileName).withChecksum(checksum).withMimetype(mimeType)
            .withLength(length);

    when(request.getHeader(eq("Range"))).thenReturn("bytes=invalid");

    multipartFileSender.serveResource();

    assertEquals(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE, responseWrapper.getStatusCode());
}

---

From source file:eionet.eunis.servlets.DownloadServlet.java

/**
 * Process the actual request.// w ww. ja  v a2  s . com
 *
 * @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.
 * @throws ServletException
 */
private void processRequest(HttpServletRequest request, HttpServletResponse response, boolean content)
        throws IOException, ServletException {

    String requestURI = request.getRequestURI();
    String contextPath = request.getContextPath();
    String pathInfo = request.getPathInfo();
    String servletPath = request.getServletPath();

    // Create the abstract file reference to the requested file.
    File file = null;
    String fileRelativePath = StringUtils.substringAfter(request.getRequestURI(), request.getContextPath());
    fileRelativePath = StringUtils.replace(fileRelativePath, "%20", " ");
    if (StringUtils.isNotEmpty(fileRelativePath) && StringUtils.isNotEmpty(appHome)) {
        file = new File(appHome, fileRelativePath);
    }

    // If file was not found, send 404.
    if (file == null || !file.exists() || file.isDirectory()) {
        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;

    // 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.setHeader("ETag", eTag); // 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", eTag); // 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, 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.
    // 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.
    if (contentType.startsWith("text")) {
        String acceptEncoding = request.getHeader("Accept-Encoding");
        acceptsGzip = acceptEncoding != null && accepts(acceptEncoding, "gzip");
        contentType += ";charset=UTF-8";
    } 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", System.currentTimeMillis() + DEFAULT_EXPIRE_TIME);

    // 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:eionet.gdem.web.FileDownloadServlet.java

/**
 * Process the actual request.//  w  ww . j a va2  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.
 * @throws ServletException If an error occurs.
 */
private void processRequest(HttpServletRequest request, HttpServletResponse response, boolean content)
        throws IOException, ServletException {

    String urlPath = URLDecoder
            .decode(StringUtils.substringAfter(request.getRequestURI(), request.getContextPath()), "UTF-8");
    String filePath = Properties.appRootFolder + urlPath;

    String securityMessage = checkPermissions(request, urlPath);
    if (securityMessage != null) {
        handleNotAuthorised(securityMessage, request, response);
        return;
    }

    // Get the file object from the file store
    File file = new File(filePath);

    // If file was not found, send 404.
    if (file == null || !file.exists() || !file.isFile()) {
        handleFileNotFound("Could not find file by the following URI: " + request.getRequestURI(), request,
                response);
        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;

    // 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.setHeader("ETag", eTag); // 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", eTag); // 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, 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 = "text/plain";
    }

    // 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.
    // 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.
    if (contentType.startsWith("text")) {
        String acceptEncoding = request.getHeader("Accept-Encoding");
        acceptsGzip = acceptEncoding != null && accepts(acceptEncoding, "gzip");
        contentType += ";charset=UTF-8";
    } 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", System.currentTimeMillis() + DEFAULT_EXPIRE_TIME);

    // 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.openmrs.module.patientnarratives.web.servlet.FileServlet.java

/**
 * Process the actual request./*from  w  w w  . java 2 s  .  co 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.
 */
private void processRequest(HttpServletRequest request, HttpServletResponse response, boolean content)
        throws IOException {
    // Validate the requested file ------------------------------------------------------------

    Integer videoObsId = Integer.parseInt(request.getParameter("obsId"));
    Obs complexObs = Context.getObsService().getComplexObs(videoObsId, OpenmrsConstants.RAW_VIEW);
    ComplexData complexData = complexObs.getComplexData();
    byte[] videoObjectData = ((byte[]) complexData.getData());

    String fileExt_file = complexData.getTitle();
    String arrFileExt[] = fileExt_file.split(" ");

    tempMergedVideoFile = createFile(arrFileExt[0]);
    String requestedFile = tempMergedVideoFile.getCanonicalPath();

    FileUtils.writeByteArrayToFile(new File(requestedFile), videoObjectData);

    // 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 file = new File(requestedFile);

    // 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);
        tempMergedVideoFile.delete();
    }
}

---

From source file:info.magnolia.cms.filters.RangeSupportFilter.java

private HttpServletResponse wrapResponse(final HttpServletRequest request, final HttpServletResponse response) {
    return new HttpServletResponseWrapper(response) {

        /** default length is max. We hope that the underlying code will set proper content length as a header before we proceed serving some bytes. */
        private int length = Integer.MAX_VALUE;

        private final Map<String, Object> headers = new HashMap<String, Object>();

        private String eTag;

        private List<RangeInfo> ranges;

        private RangeInfo full;

        private ServletOutputStream stream;

        private PrintWriter writer;

        @Override//  ww  w .  jav  a2s . c  o  m
        public void addDateHeader(String name, long date) {
            super.addDateHeader(name, date);
            this.headers.put(name, date);
            if ("Last-Modified".equalsIgnoreCase(name)) {
                lastModTime = date;
            }
        }

        @Override
        public void setDateHeader(String name, long date) {
            super.setDateHeader(name, date);
            this.headers.put(name, date);
            if ("Last-Modified".equalsIgnoreCase(name)) {
                lastModTime = date;
            }
        }

        @Override
        public void addHeader(String name, String value) {
            if ("Content-Disposition".equalsIgnoreCase(name) && log.isDebugEnabled()) {
                log.warn("content disposition enforced by underlying filter/servlet");
            }
            super.addHeader(name, value);
            this.headers.put(name, value);
        }

        @Override
        public void setHeader(String name, String value) {
            if ("Content-Disposition".equalsIgnoreCase(name) && log.isDebugEnabled()) {
                log.warn("content disposition enforced by underlying filter/servlet");
            }
            super.setHeader(name, value);
            this.headers.put(name, value);
        }

        @Override
        public void addIntHeader(String name, int value) {
            super.addIntHeader(name, value);
            this.headers.put(name, value);
        }

        @Override
        public void setIntHeader(String name, int value) {
            super.setIntHeader(name, value);
            this.headers.put(name, value);
        }

        @Override
        public void setContentLength(int len) {
            this.length = len;
            // do not propagate length up. We might not be able to change it once it is set. We will set it ourselves once we are ready to serve bytes.
        }

        @Override
        public ServletOutputStream getOutputStream() throws IOException {
            // make sure we set stream only once. Multiple calls to this method are allowed.
            if (this.stream == null) {
                ServletOutputStream stream = super.getOutputStream();
                // wrap the response to filter out everything except desired range
                this.stream = addRangeSupportWrapper(request, response, stream);

                if (!isServeContent || this.stream == null) {
                    // swallow output on head requests
                    this.stream = new ServletOutputStream() {

                        @Override
                        public void write(int b) throws IOException {
                            // do nothing, we do not write any output now
                        }
                    };
                }
            }
            return stream;
        }

        private ServletOutputStream addRangeSupportWrapper(final HttpServletRequest request,
                final HttpServletResponse response, ServletOutputStream stream) throws IOException {
            if (!processContent(request, response)) {
                // we might have to return null stream instead as the previous method already called res.sendError();
                return null;
            }

            if (headers.containsKey("Content-Range")) {
                // doesn't work for tomcat as it accesses underlying stream under our hands!!!
                log.debug("Range request was handled by underlying filter/servlet.");
                return stream;
            }
            if (ranges == null || ranges.isEmpty()) {
                // no op, serve all as usual
                log.debug("Didn't find any range to speak of. Serving all content as usual.");
                if (length != Integer.MAX_VALUE) {
                    // set real length when we know it
                    response.setContentLength(length);
                }
            } else if (ranges.size() == 1) {
                RangeInfo range = ranges.get(0);
                log.debug("Serving range [{}].", range);
                // setting 206 header is essential for some clients. The would abort if response is set to 200
                response.setStatus(SC_PARTIAL_CONTENT);
                stream = new RangedOutputStream(stream, range);
            } else {
                log.error("Requested multiple ranges [{}].", ranges.size());
                // TODO: add support for multiple ranges (sent as multipart request), for now just send error back
                response.setHeader("Content-Range", "bytes */" + length);
                response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE);
                // again we might have to return null stream after calling sendError() as the original stream might no longer be valid
            }
            return stream;
        }

        @Override
        public PrintWriter getWriter() throws IOException {
            if (!wrapWriter) {
                return super.getWriter();
            }
            if (this.writer == null) {
                this.writer = new PrintWriter(new OutputStreamWriter(getOutputStream()));
            }
            return writer;
        }

        private boolean processContent(HttpServletRequest request, HttpServletResponse response)
                throws IOException {
            log.debug("Serving binary on uri {} was last modified at {}",
                    new Object[] { request.getRequestURI(), lastModTime });
            if (!isRequestValid(request, response)) {
                log.debug("Skipping request {} since it doesn't require body",
                        new Object[] { request.getRequestURI() });
                return false;
            }
            if (!processRange(request)) {
                log.debug("Could not process range of request {}", new Object[] { request.getRequestURI() });
                return false;
            }
            return true;
        }

        private boolean processRange(HttpServletRequest request) throws IOException {
            full = new RangeInfo(0, length - 1, length);
            ranges = new ArrayList<RangeInfo>();

            String range = request.getHeader("Range");

            // Valid range header format is "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);
                response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE);
                return false;
            }

            // If-Range header must 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");
                    if (ifRangeTime != -1 && ifRangeTime + 1000 < lastModTime) {
                        ranges.add(full);
                    }
                } catch (IllegalArgumentException ignore) {
                    // happens when if-range contains something else then date
                    ranges.add(full);
                }
            }

            // in case there were no invalid If-Range headers, then look at requested byte ranges.
            if (ranges.isEmpty()) {
                for (String part : range.substring(6).split(",")) {
                    int start = intSubstring(StringUtils.substringBefore(part, "-"));
                    int end = intSubstring(StringUtils.substringAfter(part, "-"));

                    if (start == -1) {
                        start = length - end;
                        end = length - 1;
                    } else if (end == -1 || end > length - 1) {
                        end = length - 1;
                    }

                    // Is range valid?
                    if (start > end) {
                        response.setHeader("Content-Range", "bytes */" + length); // Required in 416.
                        response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE);
                        return false;
                    }

                    // Add range.
                    ranges.add(new RangeInfo(start, end, length));
                }
            }

            response.setHeader("ETag", eTag);
            if (ranges.size() == 1) {
                RangeInfo r = ranges.get(0);
                response.setHeader("Accept-Ranges", "bytes");
                response.setHeader("Content-Range",
                        "bytes " + r.start + "-" + r.end + "/" + r.totalLengthOfServedBinary);
                length = r.lengthOfRange;
            }
            return true;
        }

        private int intSubstring(String value) {
            return value.length() > 0 ? Integer.parseInt(value) : -1;
        }

        @Override
        public void flushBuffer() throws IOException {
            if (writer != null) {
                writer.flush();
            }
            if (stream != null) {
                stream.flush();
            }

            super.flushBuffer();
        }

        private boolean isRequestValid(HttpServletRequest request, HttpServletResponse response)
                throws IOException {
            String fileName = StringUtils.substringAfterLast(request.getRequestURI(), "/");
            eTag = fileName + "_" + length + "_" + lastModTime;

            // If-None-Match header should contain "*" or ETag.
            String ifNoneMatch = request.getHeader("If-None-Match");
            if (ifNoneMatch != null && matches(ifNoneMatch, eTag)) {
                response.setHeader("ETag", eTag); // Required in 304.
                log.debug("Returning {} on header If-None-Match", HttpServletResponse.SC_NOT_MODIFIED);
                response.sendError(HttpServletResponse.SC_NOT_MODIFIED);
                return false;
            }

            // If-Modified-Since header must be greater than LastModified. ignore if If-None-Match header exists
            long ifModifiedSince = request.getDateHeader("If-Modified-Since");
            if (ifNoneMatch == null && ifModifiedSince != -1 && ifModifiedSince + 1000 > lastModTime) {
                response.setHeader("ETag", eTag); // Required in 304.
                // 304 response should contain Date header unless running on timeless server (see 304 response docu)
                response.addDateHeader("Date", lastModTime);
                log.debug("Returning {} on header If-Modified-Since", HttpServletResponse.SC_NOT_MODIFIED);
                response.sendError(HttpServletResponse.SC_NOT_MODIFIED);
                return false;
            }

            // If-Match header should contain "*" or ETag.
            String ifMatch = request.getHeader("If-Match");
            if (ifMatch != null && !matches(ifMatch, eTag)) {
                log.debug("Returning {} on header If-Match", HttpServletResponse.SC_PRECONDITION_FAILED);
                response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED);
                return false;
            }

            // If-Unmodified-Since header must be greater than LastModified.
            long ifUnmodifiedSince = request.getDateHeader("If-Unmodified-Since");
            if (ifUnmodifiedSince != -1 && ifUnmodifiedSince + 1000 <= lastModTime) {
                log.debug("Returning {} on header If-Unmodified-Since",
                        HttpServletResponse.SC_PRECONDITION_FAILED);
                response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED);
                return false;
            }

            log.debug("Passed all precondition checkes for request {}", request.getRequestURI());
            return true;
        }
    };
}

---

From source file:org.messic.server.facade.controllers.rest.SongController.java

@ApiMethod(path = "/services/songs/{songSid}/audio", verb = ApiVerb.GET, description = "Get the audio binary from a song resource of an album", produces = {
        MediaType.APPLICATION_OCTET_STREAM_VALUE })
@ApiErrors(apierrors = { @ApiError(code = UnknownMessicRESTException.VALUE, description = "Unknown error"),
        @ApiError(code = NotAuthorizedMessicRESTException.VALUE, description = "Forbidden access"),
        @ApiError(code = IOMessicRESTException.VALUE, description = "IO error trying to get the audio resource") })
@RequestMapping(value = "/{songSid}/audio", method = { RequestMethod.GET, RequestMethod.HEAD })
@ResponseStatus(HttpStatus.OK)/*from  w ww . j  a  va  2s  .c om*/
public void getSongWithRanges(
        @ApiParam(name = "songSid", description = "SID of the song resource we want to download", paramType = ApiParamType.PATH, required = true) @PathVariable Long songSid,
        HttpServletRequest request, HttpServletResponse response)
        throws NotAuthorizedMessicRESTException, IOMessicRESTException, UnknownMessicRESTException {
    User user = SecurityUtil.getCurrentUser();

    try {
        //http://balusc.blogspot.com.es/2009/02/fileservlet-supporting-resume-and.html
        // Whether the request body should be written (GET) or not (HEAD).
        boolean content = request.getMethod().equalsIgnoreCase("GET");
        APISong.AudioSongStream ass = songAPI.getAudioSong(user, songSid);

        // Validate and process Range and If-Range headers.
        String eTag = songSid + "_" + ass.contentLength + "_" + ass.lastModified;
        long expires = System.currentTimeMillis() + Range.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 && Range.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 > ass.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 && !Range.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 <= ass.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, ass.contentLength - 1, ass.contentLength);
        List<Range> ranges = new ArrayList<Range>();

        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 */" + ass.contentLength); // 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 < ass.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 = Range.sublong(part, 0, part.indexOf("-"));
                    long end = Range.sublong(part, part.indexOf("-") + 1, part.length());

                    if (start == -1) {
                        start = ass.contentLength - end;
                        end = ass.contentLength - 1;
                    } else if (end == -1 || end > ass.contentLength - 1) {
                        end = ass.contentLength - 1;
                    }

                    // Check if Range is syntactically valid. If not, then return 416.
                    if (start > end) {
                        response.setHeader("Content-Range", "bytes */" + ass.contentLength); // Required in 416.
                        response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE);
                        return;
                    }

                    // Add range.
                    ranges.add(new Range(start, end, ass.contentLength));
                }
            }
        }

        // Prepare and initialize response --------------------------------------------------------

        // Get content type by file name and set default GZIP support and content disposition.
        String contentType = "audio/mpeg";
        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 && Range.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 && Range.accepts(accept, contentType) ? "inline" : "attachment";
        }

        // Initialize response.
        response.reset();
        response.setBufferSize(Range.DEFAULT_BUFFER_SIZE);
        response.setHeader("Content-Disposition", disposition + ";filename=\"" + ass.songFileName + "\"");
        response.setHeader("Accept-Ranges", "bytes");
        response.setHeader("ETag", eTag);
        response.setDateHeader("Last-Modified", ass.lastModified);
        response.setDateHeader("Expires", expires);

        // Send requested file (part(s)) to client ------------------------------------------------

        // Prepare streams.
        OutputStream output = null;

        try {
            // Open streams.
            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, Range.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.
                    Range.copy(ass.raf, 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.
                    Range.copy(ass.raf, output, r.start, r.length);
                }

            } else {

                // Return multiple parts of file.
                response.setContentType("multipart/byteranges; boundary=" + Range.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("--" + Range.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.
                        Range.copy(ass.raf, output, r.start, r.length);
                    }

                    // End with multipart boundary.
                    sos.println();
                    sos.println("--" + Range.MULTIPART_BOUNDARY + "--");
                }
            }
        } finally {
            // Gently close streams.
            Range.close(output);
            Range.close(ass.is);
            Range.close(ass.raf);
        }
        return;
    } catch (IOException ioe) {
        log.error("failed!", ioe);
        throw new IOMessicRESTException(ioe);
    } catch (Exception e) {
        throw new UnknownMessicRESTException(e);
    }
}

---

From source file:httpUtils.HttpUtils.java

/**
 * Parse the request headers, build the response, stream back file
 * @param request/*from  ww  w .j  a  v a 2 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:org.olat.core.gui.media.ServletUtil.java

protected static List<Range> parseRange(HttpServletRequest request, HttpServletResponse response,
        long lastModified, long fileLength) throws IOException {

    String headerValue = request.getHeader("If-Range");

    if (headerValue != null) {
        long headerValueTime = (-1L);
        try {/*from   w ww . jav a  2 s .c o m*/
            headerValueTime = request.getDateHeader("If-Range");
        } catch (IllegalArgumentException e) {
            //
        }

        if (headerValueTime != (-1L)) {
            // If the timestamp of the entity the client got is older than
            // the last modification date of the entity, the entire entity
            // is returned.
            if (lastModified > (headerValueTime + 1000))
                return Collections.emptyList();
        }
    }

    if (fileLength == 0)
        return null;

    // Retrieving the range header (if any is specified
    String rangeHeader = request.getHeader("Range");

    if (rangeHeader == null)
        return null;
    // bytes is the only range unit supported (and I don't see the point
    // of adding new ones).
    if (!rangeHeader.startsWith("bytes")) {
        response.addHeader("Content-Range", "bytes */" + fileLength);
        response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE);
        return null;
    }

    rangeHeader = rangeHeader.substring(6);

    // Vector which will contain all the ranges which are successfully
    // parsed.
    List<Range> result = new ArrayList<Range>();
    StringTokenizer commaTokenizer = new StringTokenizer(rangeHeader, ",");

    // Parsing the range list
    while (commaTokenizer.hasMoreTokens()) {
        String rangeDefinition = commaTokenizer.nextToken().trim();

        Range currentRange = new Range();
        currentRange.length = fileLength;

        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 {
                long offset = Long.parseLong(rangeDefinition);
                currentRange.start = fileLength + offset;
                currentRange.end = fileLength - 1;
            } catch (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 (NumberFormatException e) {
                response.addHeader("Content-Range", "bytes */" + fileLength);
                response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE);
                return null;
            }

        }

        if (!currentRange.validate()) {
            response.addHeader("Content-Range", "bytes */" + fileLength);
            response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE);
            return null;
        }

        result.add(currentRange);
    }

    return result;
}

---

From source file:org.jahia.services.content.files.StaticFileServlet.java

/**
 * Process the actual request./*w w  w  . ja  v  a 2  s .  c om*/
 *
 * @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.
 */
private void processRequest(HttpServletRequest request, HttpServletResponse response, boolean content)
        throws IOException {

    // Validate the requested file ------------------------------------------------------------

    // 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 file = new File(basePath, URLDecoder.decode(requestedFile, "UTF-8"));

    // Check if file actually exists in filesystem.
    if (!file.exists() || !file.isFile()) {
        // 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;
    }

    // Verify the file requested is a descendant of the base directory.
    if (!file.getCanonicalPath().startsWith(basePath)) {
        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 (!PATTERN_RANGE.matcher(range).matches()) {
            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 : Patterns.COMMA.split(range.substring(6))) {
                // 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 = enableGzip && 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.dspace.app.rest.utils.MultipartFileSender.java

public boolean isValid() throws IOException {
    if (response == null || request == null) {
        return false;
    }/*  w  ww  .  j av  a  2  s . com*/

    if (inputStream == null) {
        log.error("Input stream has no content");
        response.sendError(HttpServletResponse.SC_NOT_FOUND);
        return false;
    }

    if (StringUtils.isEmpty(fileName)) {
        response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
        return false;
    }

    // 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 (nonNull(ifNoneMatch) && matches(ifNoneMatch, checksum)) {
        log.debug("If-None-Match header should contain \"*\" or ETag. If so, then return 304.");
        response.setHeader(ETAG, checksum); // Required in 304.
        response.sendError(HttpServletResponse.SC_NOT_MODIFIED);
        return false;
    }

    // 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 (isNull(ifNoneMatch) && ifModifiedSince != -1 && ifModifiedSince + 1000 > lastModified) {
        log.debug("If-Modified-Since header should be greater than LastModified. If so, then return 304.");
        response.setHeader(ETAG, checksum); // Required in 304.
        response.sendError(HttpServletResponse.SC_NOT_MODIFIED);
        return false;
    }

    // Validate request headers for resume ----------------------------------------------------

    // If-Match header should contain "*" or ETag. If not, then return 412.
    String ifMatch = request.getHeader(IF_MATCH);
    if (nonNull(ifMatch) && !matches(ifMatch, checksum)) {
        log.error("If-Match header should contain \"*\" or ETag. If not, then return 412.");
        response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE);
        return false;
    }

    // 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) {
        log.error("If-Unmodified-Since header should be greater than LastModified. If not, then return 412.");
        response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED);
        return false;
    }

    return true;
}

---

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