Example usage for javax.servlet.http HttpServletResponse flushBuffer

List of usage examples for javax.servlet.http HttpServletResponse flushBuffer

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Introduction

In this page you can find the example usage for javax.servlet.http HttpServletResponse flushBuffer.

Prototype

public void flushBuffer() throws IOException;

Source Link

Document

Forces any content in the buffer to be written to the client.

Usage

From source file:org.nsesa.editor.gwt.an.amendments.server.service.WordExportService.java

@Override
public void export(AmendmentContainerDTO object, HttpServletResponse response) throws IOException {

    response.setContentType("application/vnd.openxmlformats-officedocument.wordprocessingml.document");
    response.setHeader("Content-Disposition",
            "attachment;filename=" + object.getAmendmentContainerID() + ".docx");
    response.setCharacterEncoding("UTF8");

    final String content = object.getBody();
    final InputSource inputSource;
    inputSource = new InputSource(new StringReader(content));

    try {//from  w ww  .  j  a  v  a  2s. co m

        final NodeModel model = NodeModel.parse(inputSource);
        final Configuration configuration = new Configuration();
        configuration.setDefaultEncoding("UTF-8");
        configuration.setDirectoryForTemplateLoading(template.getFile().getParentFile());
        final StringWriter sw = new StringWriter();
        Map<String, Object> root = new HashMap<String, Object>();
        root.put("amendment", model);
        configuration.getTemplate(template.getFile().getName()).process(root, sw);
        byte[] bytes = sw.toString().getBytes("utf-8");
        IOUtils.copy(new ByteArrayInputStream(bytes), response.getOutputStream());
        response.setContentLength(sw.toString().length());
        response.flushBuffer();
    } catch (IOException e) {
        throw new RuntimeException("Could not read file.", e);
    } catch (SAXException e) {
        throw new RuntimeException("Could not parse file.", e);
    } catch (ParserConfigurationException e) {
        throw new RuntimeException("Could not parse file.", e);
    } catch (TemplateException e) {
        throw new RuntimeException("Could not load template.", e);
    }
}

From source file:cn.lhfei.fu.web.controller.TeacherController.java

/**
 * Method for handling file download request from client
 *///w w w  .  ja v a2s  .  c o m
@RequestMapping(value = "downloadImg", method = RequestMethod.GET)
public void downloadImg(HttpServletRequest request, HttpServletResponse response, @RequestParam("id") int id)
        throws IOException {
    try {
        HomeworkArchive homeworkArchive = homeworkArchiveService.read(id);
        if (null != homeworkArchive) {
            File file = new File(homeworkArchive.getArchivePath());
            String fileName = homeworkArchive.getArchiveName();
            //fileName = java.net.URLEncoder.encode(fileName,"UTF-8");
            // get your file as InputStream
            InputStream is = new FileInputStream(file);
            response.setContentType("application/image;charset=UTF-8");
            response.setContentLength(new Long(file.length()).intValue());
            response.setHeader("Content-Disposition",
                    "attachment; filename=" + fileName + ".jpg; charset=UTF-8");

            // copy it to response's OutputStream
            org.apache.commons.io.IOUtils.copy(is, response.getOutputStream());
            response.flushBuffer();
        }
    } catch (IOException ex) {
        log.error(ex.getMessage(), ex);
        throw new RuntimeException("IOError writing file to output stream", ex);
    }
}

From source file:edu.mayo.cts2.framework.plugin.service.lexevs.bulk.mapversion.controller.MapVersionBulkDownloadController.java

/**
 * Download.//from w  w  w.ja  va  2 s .c om
 *
 * @param response the response
 * @param codingschemes the codingschemes
 * @param fields the fields
 * @param separator the separator
 * @throws LBException the lB exception
 */
@RequestMapping(value = "/exporter/map")
public void download(HttpServletResponse response, @RequestParam(value = "map", required = true) String map,
        @RequestParam(value = "fields", defaultValue = "") String fields,
        @RequestParam(value = "separator", defaultValue = DEFAULT_SEPARATOR) char separator,
        @RequestParam(value = "filename", defaultValue = DEFAULT_FILE_NAME) String filename)
        throws LBException {

    List<String> fieldsList;
    if (StringUtils.isBlank(fields)) {
        fieldsList = DEFAULT_FIELDS;
    } else {
        fieldsList = Arrays.asList(StringUtils.split(fields, ','));
    }

    this.setHeaders(response, filename);

    String[] parts = StringUtils.split(map, ':');

    CodingSchemeReference reference = new CodingSchemeReference();
    reference.setCodingScheme(parts[0]);

    if (parts.length == 2) {
        reference.setVersionOrTag(Constructors.createCodingSchemeVersionOrTagFromVersion(parts[1]));
    }

    try {
        this.mapVersionBulkDownloader.download(response.getOutputStream(), reference, fieldsList, separator);
    } catch (IOException e) {
        throw new RuntimeException(e);
    }

    try {
        response.flushBuffer();
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
}

From source file:ch.unifr.pai.twice.widgets.mpproxy.server.JettyProxy.java

public void handleConnect(HttpServletRequest request, HttpServletResponse response) throws IOException {
    String uri = request.getRequestURI();

    String port = "";
    String host = "";

    int c = uri.indexOf(':');
    if (c >= 0) {
        port = uri.substring(c + 1);/*w ww  .  j  av a2  s.c  o m*/
        host = uri.substring(0, c);
        if (host.indexOf('/') > 0)
            host = host.substring(host.indexOf('/') + 1);
    }

    InetSocketAddress inetAddress = new InetSocketAddress(host, Integer.parseInt(port));

    // if
    // (isForbidden(HttpMessage.__SSL_SCHEME,addrPort.getHost(),addrPort.getPort(),false))
    // {
    // sendForbid(request,response,uri);
    // }
    // else
    {
        InputStream in = request.getInputStream();
        final OutputStream out = response.getOutputStream();

        final Socket socket = new Socket(inetAddress.getAddress(), inetAddress.getPort());

        response.setStatus(200);
        response.setHeader("Connection", "close");
        response.flushBuffer();

        //         try {
        //            Thread copy = new Thread(new Runnable() {
        //               public void run() {
        //                  try {
        IOUtils.copy(socket.getInputStream(), out);
        //                  } catch (IOException e) {
        //                     e.printStackTrace();
        //                  }
        //               }
        //            });
        //            copy.start();
        IOUtils.copy(in, socket.getOutputStream());
        //            copy.join();
        //            copy.join(10000);
        //         }
        //         catch (InterruptedException e) {
        //            e.printStackTrace();
        //         }
    }
}

From source file:org.eclipse.vorto.repository.web.ModelRepositoryController.java

@ApiOperation(value = "Download a Model specified by Model ID")
@RequestMapping(value = "/file/{namespace}/{name}/{version:.+}", method = RequestMethod.GET)
public void downloadModelById(
        @ApiParam(value = "Namespace", required = true) final @PathVariable String namespace,
        @ApiParam(value = "Name", required = true) final @PathVariable String name,
        @ApiParam(value = "Version", required = true) final @PathVariable String version,
        @ApiParam(value = "Output Type", required = true) final @RequestParam(value = "output", required = false) String outputType,
        @ApiParam(value = "Response", required = true) final HttpServletResponse response) {

    Objects.requireNonNull(namespace, "namespace must not be null");
    Objects.requireNonNull(name, "name must not be null");
    Objects.requireNonNull(version, "version must not be null");

    final ModelId modelId = new ModelId(name, namespace, version);

    logger.info("downloadModelById: [" + modelId.toString() + "] - Fullpath: [" + modelId.getFullPath() + "]");

    final ContentType contentType = getContentType(outputType);
    byte[] modelContent = modelRepository.getModelContent(modelId, contentType);
    if (modelContent != null && modelContent.length > 0) {
        final ModelResource modelResource = modelRepository.getById(modelId);
        response.setHeader(CONTENT_DISPOSITION, ATTACHMENT_FILENAME + getFileName(modelResource, contentType));
        response.setContentType(APPLICATION_OCTET_STREAM);
        try {//from   w w w.ja va  2  s.  c o  m
            IOUtils.copy(new ByteArrayInputStream(modelContent), response.getOutputStream());
            response.flushBuffer();
        } catch (IOException e) {
            throw new RuntimeException("Error copying file.", e);
        }
    } else {
        throw new RuntimeException("File not found.");
    }
}

From source file:io.apiman.manager.ui.server.servlets.UrlFetchProxyServlet.java

/**
 * @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
 *///from  w  w w.ja v a 2  s  .  c  om
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    String url = req.getHeader("X-Apiman-Url"); //$NON-NLS-1$
    if (url == null) {
        resp.sendError(500, "No URL specified in X-Apiman-Url"); //$NON-NLS-1$
        return;
    }

    URL remoteUrl = new URL(url);
    HttpURLConnection remoteConn = (HttpURLConnection) remoteUrl.openConnection();
    InputStream remoteIS = null;
    OutputStream responseOS = null;
    try {
        remoteConn.connect();
        Map<String, List<String>> headerFields = remoteConn.getHeaderFields();
        for (String headerName : headerFields.keySet()) {
            if (headerName == null) {
                continue;
            }
            if (EXCLUDE_HEADERS.contains(headerName)) {
                continue;
            }
            String headerValue = remoteConn.getHeaderField(headerName);
            resp.setHeader(headerName, headerValue);
        }
        resp.setHeader("Cache-control", "no-cache, no-store, must-revalidate"); //$NON-NLS-1$ //$NON-NLS-2$
        remoteIS = remoteConn.getInputStream();
        responseOS = resp.getOutputStream();
        IOUtils.copy(remoteIS, responseOS);
        resp.flushBuffer();
    } catch (Exception e) {
        resp.sendError(500, e.getMessage());
    } finally {
        IOUtils.closeQuietly(responseOS);
        IOUtils.closeQuietly(remoteIS);
    }
}

From source file:com.emergya.persistenceGeo.web.RestLayersAdminController.java

/**
 * This method loads layers.json related with a user
 * /*from w ww .j a  v  a  2 s.c o  m*/
 * @param username
 * 
 * @return JSON file with layers
 */
@RequestMapping(value = "/persistenceGeo/getLayerResource/{layerId}", method = RequestMethod.GET, produces = {
        MediaType.APPLICATION_JSON_VALUE })
public void loadLayer(@PathVariable String layerId, HttpServletResponse response) {
    try {
        /*
        //TODO: Secure with logged user
        String username = ((UserDetails) SecurityContextHolder.getContext()
              .getAuthentication().getPrincipal()).getUsername(); 
         */
        response.setContentType("application/xml");
        response.setHeader("Content-Disposition", "attachment; filename=test.xml");
        IOUtils.copy(new FileInputStream(loadedLayers.get(Long.decode(layerId))), response.getOutputStream());
        response.flushBuffer();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:org.apache.roller.weblogger.ui.struts2.ajax.CommentDataServlet.java

/**
 * Accepts request with comment 'id' parameter and returns comment id and
 * content in JSON format. For example comment with id "3454545346" and
 * content "hi there" will be represented as:
 *    {id : "3454545346", content : "hi there"}
 *///from www  .j  a  v a  2 s.c o m
public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

    Weblogger roller = WebloggerFactory.getWeblogger();
    try {
        WeblogEntryManager wmgr = roller.getWeblogEntryManager();
        WeblogEntryComment c = wmgr.getComment(request.getParameter("id"));
        if (c == null) {
            response.setStatus(HttpServletResponse.SC_NOT_FOUND);
        } else {
            // need post permission to view comments
            RollerSession rses = RollerSession.getRollerSession(request);
            Weblog weblog = c.getWeblogEntry().getWebsite();
            if (weblog.hasUserPermission(rses.getAuthenticatedUser(), WeblogPermission.POST)) {
                String content = Utilities.escapeHTML(c.getContent());
                content = WordUtils.wrap(content, 72);
                content = StringEscapeUtils.escapeJavaScript(content);
                String json = "{ id: \"" + c.getId() + "\"," + "content: \"" + content + "\" }";
                response.setStatus(HttpServletResponse.SC_OK);
                response.setContentType("text/html; charset=utf-8");
                response.getWriter().print(json);
                response.flushBuffer();
                response.getWriter().flush();
                response.getWriter().close();
            } else {
                response.setStatus(HttpServletResponse.SC_FORBIDDEN);
            }
        }

    } catch (Exception e) {
        throw new ServletException(e.getMessage());
    }
}

From source file:org.eclipse.smarthome.ui.icon.internal.IconServlet.java

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

    if (req.getDateHeader("If-Modified-Since") > startupTime) {
        resp.setStatus(304);//w ww  .  j  av  a  2s  . c om
        return;
    }

    String category = getCategory(req);
    Format format = getFormat(req);
    String state = getState(req);
    String iconSetId = getIconSetId(req);

    IconProvider topProvider = null;
    int maxPrio = Integer.MIN_VALUE;
    for (IconProvider provider : iconProvider) {
        Integer prio = provider.hasIcon(category, iconSetId, format);
        if (prio != null && prio > maxPrio) {
            maxPrio = prio;
            topProvider = provider;
        }
    }
    if (topProvider != null) {
        if (format.equals(Format.SVG)) {
            resp.setContentType("image/svg+xml");
        } else {
            resp.setContentType("image/png");
        }
        resp.setDateHeader("Last-Modified", new Date().getTime());
        ServletOutputStream os = resp.getOutputStream();
        try (InputStream is = topProvider.getIcon(category, iconSetId, state, format)) {
            IOUtils.copy(is, os);
            resp.flushBuffer();
        } catch (IOException e) {
            logger.error("Failed sending the icon byte stream as a response: {}", e.getMessage());
            resp.sendError(500, e.getMessage());
        }
    } else {
        resp.sendError(404);
    }
}

From source file:architecture.ee.web.spring.controller.DownloadController.java

@RequestMapping(value = "/files/{fileId:[\\p{Digit}]+}/{filename:.+}", method = { RequestMethod.GET,
        RequestMethod.POST })//from w  ww. j  a  va 2s .c o  m
@ResponseBody
public void downloadFile(@PathVariable("fileId") Long fileId, @PathVariable("filename") String filename,
        @RequestParam(value = "thumbnail", defaultValue = "false", required = false) boolean thumbnail,
        @RequestParam(value = "width", defaultValue = "150", required = false) Integer width,
        @RequestParam(value = "height", defaultValue = "150", required = false) Integer height,
        HttpServletResponse response) throws IOException {

    try {
        if (fileId > 0 && StringUtils.isNotEmpty(filename)) {
            Attachment attachment = attachmentManager.getAttachment(fileId);
            if (StringUtils.equals(filename, attachment.getName())) {
                if (thumbnail) {
                    if (StringUtils.startsWithIgnoreCase(attachment.getContentType(), "image")
                            || StringUtils.endsWithIgnoreCase(attachment.getContentType(), "pdf")) {
                        InputStream input = attachmentManager.getAttachmentImageThumbnailInputStream(attachment,
                                width, height);
                        response.setContentType(attachment.getThumbnailContentType());
                        response.setContentLength(attachment.getThumbnailSize());
                        IOUtils.copy(input, response.getOutputStream());
                        response.flushBuffer();
                    }
                } else {
                    InputStream input = attachmentManager.getAttachmentInputStream(attachment);
                    response.setContentType(attachment.getContentType());
                    response.setContentLength(attachment.getSize());
                    IOUtils.copy(input, response.getOutputStream());
                    response.setHeader("contentDisposition",
                            "attachment;filename=" + getEncodedFileName(attachment));
                    response.flushBuffer();
                }
            } else {
                throw new NotFoundException();
            }
        } else {
            throw new NotFoundException();
        }
    } catch (NotFoundException e) {
        response.sendError(404);
    }

}