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:de.itsvs.cwtrpc.security.RpcRedirectStrategy.java

public void sendRedirect(HttpServletRequest request, HttpServletResponse response, String url)
        throws IOException {
    final String responseText;

    responseText = createResponseText(request, response, url);

    response.reset();/*w w  w.  j  a  v  a 2 s.c  om*/
    addNoCacheResponseHeaders(request, response);
    if (isError()) {
        if (log.isDebugEnabled()) {
            log.debug("Instead of redirecting to url '" + url + "' error " + getStatusCode()
                    + " will be sent to client");
        }
        if (responseText.length() > 0) {
            response.sendError(getStatusCode(), responseText);
        } else {
            response.sendError(getStatusCode());
        }
    } else {
        if (log.isDebugEnabled()) {
            log.debug("Instead of redirecting to url '" + url + "' status code will be set to "
                    + getStatusCode());
        }
        response.setContentType(CONTENT_TYPE);
        response.setCharacterEncoding(CHARACTER_ENCODING);
        response.setStatus(getStatusCode());
        writeResponseText(request, response, CHARACTER_ENCODING, url);
        response.flushBuffer();
    }
}

From source file:org.wrml.server.WrmlServlet.java

void writeVoid(final HttpServletResponse response) throws IOException {

    // TODO//  ww w  .  ja v  a 2s .c  o  m

    /*
     * Writing no entity body in the response may be perfectly fine...depending on the intent of the request (method, desired schema, etc), which is expressed in the
     * intendedResponseDimensions.
     */

    // TODO
    response.setStatus(HttpServletResponse.SC_OK);
    response.setContentLength(0);
    response.flushBuffer();
}

From source file:edu.dfci.cccb.mev.controllers.HeatmapController.java

@RequestMapping(value = "/{id}/analysis/limma({dimension},{experiment},{control})/{output}", method = { GET,
        HEAD })/*  w ww.j  a va2  s. co m*/
@ResponseStatus(OK)
public void limma(@PathVariable("id") String id, @PathVariable("experiment") String experiment,
        @PathVariable("control") String control, @PathVariable("output") String output,
        @PathVariable("dimension") String dimension, HttpServletResponse response)
        throws HeatmapNotFoundException, IOException, InvalidDimensionException {
    response.setContentType("text/plain");
    response.setHeader("Content-Disposition", "attachment;filename=" + output + ".txt");
    Heatmap heatmap = get(id);
    File limma;
    if (isRow(dimension)) {
        limma = heatmap.limmaRows(experiment, control, LimmaOutput.valueOf(output.toUpperCase()));
    } else if (isColumn(dimension)) {
        limma = heatmap.limmaColumns(experiment, control, LimmaOutput.valueOf(output.toUpperCase()));
    } else
        throw new InvalidDimensionException(dimension);
    IOUtils.copy(new FileInputStream(limma), response.getOutputStream());
    response.flushBuffer();
}

From source file:net.sourceforge.fenixedu.presentationTier.Action.administrativeOffice.lists.StudentsListByCurricularCourseDA.java

public ActionForward downloadStatistics(ActionMapping mapping, ActionForm actionForm,
        HttpServletRequest request, HttpServletResponse response) throws Exception {
    ExecutionYear executionYear = getDomainObject(request, "executionYearId");
    Set<Degree> degreesToInclude = AcademicAuthorizationGroup.getDegreesForOperation(AccessControl.getPerson(),
            AcademicOperationType.STUDENT_LISTINGS);

    final String filename = getResourceMessage("label.statistics") + "_"
            + executionYear.getName().replace('/', '-');
    final Spreadsheet spreadsheet = new Spreadsheet(filename);
    addStatisticsHeaders(spreadsheet);//from   ww  w .j a v  a 2 s  .  c o  m
    addStatisticsInformation(spreadsheet, executionYear, degreesToInclude);

    response.setContentType("application/vnd.ms-excel");
    response.setHeader("Content-disposition", "attachment; filename=" + filename + ".xls");
    ServletOutputStream writer = response.getOutputStream();

    spreadsheet.exportToXLSSheet(writer);
    writer.flush();
    response.flushBuffer();

    return null;
}

From source file:org.kuali.mobility.database.controllers.DatabaseController.java

@RequestMapping(method = RequestMethod.POST, params = "download")
public String getSchemaDownload(HttpServletRequest request, Model uiModel,
        @ModelAttribute("form") DatabaseSchemaOutputForm form, BindingResult result,
        HttpServletResponse response) {
    String viewName;// w  w w  .ja v  a2  s.c  om
    if (!isAllowedAccess("KME-ADMINISTRATORS", request)) {
        viewName = "redirect:/errors/401.jsp";
        LOG.info("Redirecting to: " + viewName);
        return viewName;
    }

    DatabaseSchemaOutputFormValidator validator = new DatabaseSchemaOutputFormValidator();
    validator.validate(form, result);

    if (result.hasErrors()) {
        uiModel.addAttribute("dialectTypes", dialectTypes);
        return "database/schemaoutputform";
    } else {
        try {
            response.setContentType("text/plain");
            response.setHeader("Content-Disposition", "attachment;filename=schema.ddl");
            String schema = this.getSchema(form.getDialectType(), form.getDelimiter(),
                    form.isNewLineBeforeDelimiter(), form.isRemoveForeignKeys());
            InputStream is = new ByteArrayInputStream(schema.getBytes("UTF-8"));
            IOUtils.copy(is, response.getOutputStream());
            response.flushBuffer();
        } catch (IOException ex) {
            // log.info("Error writing file to output stream. Filename was '" +
            // fileName + "'");
            throw new RuntimeException("IOError writing file to output stream");
        }
        return null;
    }
}

From source file:edu.jhu.cvrg.ceptools.main.SearchPubs.java

public void downloadFile(String filename, String filetype) {

    String contentType = "application/zip";

    if (filetype.equals("abf")) {
        contentType = "text/abf";
    }//from w w  w  .  jav a2 s.c o  m

    FacesContext facesContext = (FacesContext) FacesContext.getCurrentInstance();
    ExternalContext externalContext = facesContext.getExternalContext();
    PortletResponse portletResponse = (PortletResponse) externalContext.getResponse();
    HttpServletResponse response = PortalUtil.getHttpServletResponse(portletResponse);

    File file = new File(selecteddownloadfile.getFilelocation(), filename);
    BufferedInputStream input = null;
    BufferedOutputStream output = null;

    try {
        input = new BufferedInputStream(new FileInputStream(file), 10240);

        response.reset();
        response.setHeader("Content-Type", contentType);
        response.setHeader("Content-Length", String.valueOf(file.length()));
        response.setHeader("Content-Disposition", "attachment; filename=\"" + filename + "\"");
        response.flushBuffer();
        output = new BufferedOutputStream(response.getOutputStream(), 10240);

        byte[] buffer = new byte[10240];
        int length;
        while ((length = input.read(buffer)) > 0) {
            output.write(buffer, 0, length);
        }

        output.flush();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            output.close();
            input.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    facesContext.responseComplete();

}

From source file:org.ngrinder.infra.spring.ApiExceptionHandlerResolver.java

@Override
public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler,
        Exception ex) {//from   ww  w  .  j  a va  2 s  .c o  m
    if (!(handler instanceof HandlerMethod)) {
        return null;
    }

    RestAPI methodAnnotation = ((HandlerMethod) handler).getMethodAnnotation(RestAPI.class);
    if (methodAnnotation == null) {
        return null;
    }
    JsonObject object = new JsonObject();
    object.addProperty(JSON_SUCCESS, false);
    object.addProperty(JSON_CAUSE, ex.getMessage());
    StringWriter out = new StringWriter();
    //noinspection ThrowableResultOfMethodCallIgnored
    Throwable throwable = ExceptionUtils.sanitize(ex);
    PrintWriter printWriter = new PrintWriter(out);
    throwable.printStackTrace(printWriter);
    object.addProperty(JSON_STACKTRACE, out.toString());
    IOUtils.closeQuietly(printWriter);
    String jsonMessage = gson.toJson(object);
    try {
        response.setStatus(500);
        response.setContentType("application/json; charset=UTF-8");
        response.addHeader("Pragma", "no-cache");
        PrintWriter writer = response.getWriter();
        writer.write(jsonMessage);
        response.flushBuffer();
    } catch (IOException e) {
        LOGGER.error("Exception was occurred while processing api exception.", e);
    }
    return new ModelAndView();
}

From source file:com.comcast.cmb.common.controller.EndpointServlet.java

protected void doChart(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

    String pathInfo = request.getPathInfo();
    String id = pathInfo.substring(pathInfo.lastIndexOf("/") + 1);

    EndpointMetrics metrics = metricsMap.get(id);

    if (metrics != null) {

        byte b[] = generateChart(metrics, id);

        response.setContentLength(b.length);
        response.setContentType("image/jpeg");
        response.getOutputStream().write(b);
        response.flushBuffer();

    } else {/*ww w . java 2  s .  c o  m*/
        doOutput(404, response, "EndPoint - Chart", "Page not found");
    }
}

From source file:org.dataconservancy.dcs.ingest.ui.server.FileUploadServlet.java

private void uploadfile(String depositurl, String filename, InputStream is, HttpServletResponse resp)
        throws IOException {
    File tmp = null;//from   w  w w  .j  av a 2  s. c o  m
    FileOutputStream fos = null;
    PostMethod post = null;

    //System.out.println(filename + " -> " + depositurl);

    try {
        tmp = File.createTempFile("fileupload", null);
        fos = new FileOutputStream(tmp);
        FileUtil.copy(is, fos);

        HttpClient client = new HttpClient();

        post = new PostMethod(depositurl);

        Part[] parts = { new FilePart(filename, tmp) };

        post.setRequestEntity(new MultipartRequestEntity(parts, post.getParams()));

        int status = client.executeMethod(post);

        if (status == HttpStatus.SC_ACCEPTED || status == HttpStatus.SC_CREATED) {
            resp.setStatus(status);

            String src = post.getResponseHeader("X-dcs-src").getValue();
            String atomurl = post.getResponseHeader("Location").getValue();

            resp.setContentType("text/html");
            resp.getWriter().print("<html><body><p>^" + src + "^" + atomurl + "^</p></body></html>");
            resp.flushBuffer();
        } else {
            resp.sendError(status, post.getStatusText());
            return;
        }
    } finally {
        if (tmp != null) {
            tmp.delete();
        }

        if (is != null) {
            is.close();
        }

        if (fos != null) {
            fos.close();
        }

        if (post != null) {
            post.releaseConnection();
        }
    }
}

From source file:org.mycore.iview2.frontend.MCRTileCombineServlet.java

/**
 * prepares render process and gets IView2 file and combines tiles.
 * The image dimensions and path are determined from {@link HttpServletRequest#getPathInfo()}:
 * <code>/{zoomAlias}/{derivateID}/{absoluteImagePath}</code>
 * where <code>zoomAlias</code> is mapped like this:
 * <table>//from  w w  w  . j av  a 2  s  .  c o  m
 * <caption>Mapping of zoomAlias to actual zoom level</caption>
 * <tr><th>zoomAlias</th><th>zoom level</th></tr>
 * <tr><td>'MIN'</td><td>1</td></tr>
 * <tr><td>'MID'</td><td>2</td></tr>
 * <tr><td>'MAX'</td><td>3</td></tr>
 * <tr><td>default and all others</td><td>0</td></tr>
 * </table>
 * 
 * See {@link #init()} how to attach a footer to every generated image.
 */
@Override
protected void think(final MCRServletJob job) throws IOException, JDOMException {
    final HttpServletRequest request = job.getRequest();
    try {
        String pathInfo = request.getPathInfo();
        if (pathInfo.startsWith("/")) {
            pathInfo = pathInfo.substring(1);
        }
        String zoomAlias = pathInfo.substring(0, pathInfo.indexOf('/'));
        pathInfo = pathInfo.substring(zoomAlias.length() + 1);
        final String derivate = pathInfo.substring(0, pathInfo.indexOf('/'));
        String imagePath = pathInfo.substring(derivate.length());
        LOGGER.info("Zoom-Level: " + zoomAlias + ", derivate: " + derivate + ", image: " + imagePath);
        final Path iviewFile = MCRImage.getTiledFile(MCRIView2Tools.getTileDir(), derivate, imagePath);
        try (FileSystem fs = MCRIView2Tools.getFileSystem(iviewFile)) {
            Path iviewFileRoot = fs.getRootDirectories().iterator().next();
            final MCRTiledPictureProps pictureProps = MCRTiledPictureProps
                    .getInstanceFromDirectory(iviewFileRoot);
            final int maxZoomLevel = pictureProps.getZoomlevel();
            request.setAttribute(THUMBNAIL_KEY, iviewFile);
            LOGGER.info("IView2 file: " + iviewFile);
            int zoomLevel = 0;
            switch (zoomAlias) {
            case "MIN":
                zoomLevel = 1;
                break;
            case "MID":
                zoomLevel = 2;
                break;
            case "MAX":
                zoomLevel = 3;
                break;
            }
            HttpServletResponse response = job.getResponse();
            if (zoomLevel > maxZoomLevel) {
                switch (maxZoomLevel) {
                case 2:
                    zoomAlias = "MID";
                    break;
                case 1:
                    zoomAlias = "MIN";
                    break;
                default:
                    zoomAlias = "THUMB";
                    break;
                }
                if (!imagePath.startsWith("/"))
                    imagePath = "/" + imagePath;
                String redirectURL = response.encodeRedirectURL(MessageFormat.format("{0}{1}/{2}/{3}{4}",
                        request.getContextPath(), request.getServletPath(), zoomAlias, derivate, imagePath));
                response.setStatus(HttpServletResponse.SC_MOVED_PERMANENTLY);
                response.setHeader("Location", redirectURL);
                response.flushBuffer();
                return;
            }
            if (zoomLevel == 0 && footerImpl == null) {
                //we're done, sendThumbnail is called in render phase
                return;
            }
            ImageReader reader = MCRIView2Tools.getTileImageReader();
            try {
                BufferedImage combinedImage = MCRIView2Tools.getZoomLevel(iviewFileRoot, pictureProps, reader,
                        zoomLevel);
                if (combinedImage != null) {
                    if (footerImpl != null) {
                        BufferedImage footer = footerImpl.getFooter(combinedImage.getWidth(), derivate,
                                imagePath);
                        combinedImage = attachFooter(combinedImage, footer);
                    }
                    request.setAttribute(IMAGE_KEY, combinedImage);
                } else {
                    response.sendError(HttpServletResponse.SC_NOT_FOUND);
                    return;
                }
            } finally {
                reader.dispose();
            }
        }

    } finally {
        LOGGER.info("Finished sending " + request.getPathInfo());
    }
}