Example usage for javax.servlet.http HttpServletResponse flushBuffer

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:it.govpay.web.console.pagamenti.gde.exporter.EventiExporter.java

private void processRequest(HttpServletRequest req, HttpServletResponse resp)
        throws ServletException, IOException {
    try {/*from  w ww .j a  v  a 2s . c  om*/

        //         ApplicationContext context = WebApplicationContextUtils.getWebApplicationContext(getServletContext());

        //           service = (IEventiService)context.getBean("eventiService");

        //         EventiSearchForm sfInSession =    (EventiSearchForm)context.getBean("searchFormEventi");
        //         EventiSearchForm searchForm = (EventiSearchForm)sfInSession.clone();
        //         service.setForm(searchForm);

        // Then we have to get the Response where to write our file
        HttpServletResponse response = resp;

        String isAllString = req.getParameter("isAll");
        Boolean isAll = Boolean.parseBoolean(isAllString);
        String idtransazioni = req.getParameter("ids");
        String[] ids = StringUtils.split(idtransazioni, ",");
        String formato = req.getParameter("formato");

        String fileName = "Eventi.zip";

        response.setContentType("x-download");
        response.setHeader("Content-Disposition", "attachment; filename=" + fileName);
        response.addHeader("Cache-Control", "no-cache");
        response.setStatus(200);
        response.setBufferSize(1024);
        // committing status and headers
        response.flushBuffer();

        ExporterProperties prop = new ExporterProperties();
        prop.setEnableHeaderInfo(EventiExporter.enableHeaderInfo);
        prop.setFormatoExport(formato);
        prop.setMimeThrowExceptionIfNotFound(EventiExporter.mimeThrowExceptionIfNotFound);

        SingleFileExporter sfe = new SingleFileExporter(response.getOutputStream(), prop, service);

        if (isAll) {
            //transazioni = service.findAll(start, limit);
            sfe.export();
        } else {
            List<String> idEvento = new ArrayList<String>();
            for (int j = 0; j < ids.length; j++) {
                idEvento.add(ids[j]);
            }
            sfe.export(idEvento);
        }

    } catch (IOException se) {
        this.log.error(se, se);
        throw se;
    } catch (Exception e) {
        this.log.error(e, e);
        throw new ServletException(e);
    }
}

From source file:it.polimi.diceH2020.launcher.controller.DownloadsController.java

@RequestMapping(value = "/download", method = RequestMethod.GET)
@ResponseBody//from   w w  w.  ja v a 2s.  co  m
void downloadPartialExcel(@RequestParam(value = "id") Long id, HttpServletResponse response) {
    SimulationsManager manager = simulationsManagerRepository.findOne(id);
    Workbook wb = excelWriter.createWorkbook(manager);
    try {

        //response.setContentType("application/ms-excel;charset=utf-8");
        response.setContentType("application/vnd.ms-excel;charset=utf-8");
        //response.setContentType(new MediaType("application", "vnd.openxmlformats-officedocument.spreadsheetml.sheet"));
        response.setHeader("Content-Disposition", "attachment;filename = results.xls");
        wb.write(response.getOutputStream());
        response.flushBuffer();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

From source file:org.nuxeo.ecm.automation.jsf.operations.DownloadFile.java

@OperationMethod
public void run(Blob blob) throws OperationException, IOException {
    if (blob == null) {
        throw new OperationException("there is no file content available");
    }//from   ww w . jav a  2  s  .c o  m

    String filename = blob.getFilename();
    if (blob.getLength() > Functions.getBigFileSizeLimit()) {

        ExternalContext externalContext = FacesContext.getCurrentInstance().getExternalContext();
        HttpServletRequest request = (HttpServletRequest) externalContext.getRequest();
        HttpServletResponse response = (HttpServletResponse) externalContext.getResponse();

        String sid = UUID.randomUUID().toString();
        request.getSession(true).setAttribute(sid, blob);

        String bigDownloadURL = BaseURL.getBaseURL(request);
        bigDownloadURL += DownloadService.NXBIGBLOB + "/" + sid;

        try {
            // Operation was probably triggered by a POST
            // so we need to de-activate the ResponseWrapper that would
            // rewrite the URL
            request.setAttribute(NXAuthConstants.DISABLE_REDIRECT_REQUEST_KEY, new Boolean(true));
            // send the redirect
            response.sendRedirect(bigDownloadURL);
            // mark all JSF processing as completed
            response.flushBuffer();
            FacesContext.getCurrentInstance().responseComplete();
            // set Outcome to null (just in case)
            ctx.getVars().put("Outcome", null);
        } catch (IOException e) {
            log.error("Error while redirecting for big blob downloader", e);
        }
    } else {
        ComponentUtils.download(null, null, blob, filename, "operation");
    }
}

From source file:net.sourceforge.fenixedu.presentationTier.Action.candidacy.CandidacyProcessDA.java

public ActionForward prepareExecuteExportCandidacies(ActionMapping mapping, ActionForm actionForm,
        HttpServletRequest request, HttpServletResponse response) throws IOException {

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

    final ServletOutputStream writer = response.getOutputStream();
    writeCandidaciesReport(request, getProcess(request), writer);
    writer.flush();/*from   w ww .  ja v a 2  s  .  c o m*/
    response.flushBuffer();
    return null;
}

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

@ApiOperation(value = "Generate code for a specified platform")
@RequestMapping(value = "/{namespace}/{name}/{version:.+}/{serviceKey}", method = RequestMethod.GET)
public void generate(@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 = "Service Key - Platform", required = true) @PathVariable String serviceKey,
        @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");

    GeneratedOutput generatedOutput = generatorService.generate(new ModelId(name, namespace, version),
            serviceKey);//w  w w . j a va 2 s .c  om
    response.setHeader(CONTENT_DISPOSITION, ATTACHMENT_FILENAME + generatedOutput.getFileName());
    response.setContentLengthLong(generatedOutput.getSize());
    response.setContentType(APPLICATION_OCTET_STREAM);
    try {
        IOUtils.copy(new ByteArrayInputStream(generatedOutput.getContent()), response.getOutputStream());
        response.flushBuffer();
    } catch (IOException e) {
        throw new RuntimeException("Error copying file.", e);
    }
}

From source file:com.comcast.video.dawg.show.TraceController.java

/**
 * Method to generate a trace log file/*from   w w w . j  a  va  2 s  . co  m*/
 * @param trace trace log obtained from trace div
 * @param device device Id of the settop
 * @param response http response to get the trace file
 * @throws IOException Exception occurring while writing log.
 */
public void generateLogFile(String trace, String device, HttpServletRequest req, HttpServletResponse response)
        throws IOException {
    accessValidator.validateUserHasAccessToDevices(req, response, false, device);
    String timestamp = FILE_NAME_DATE_FORMATTER.format(new Date());
    response.setHeader("Content-Disposition",
            "attachment; filename=Settop_" + device + "_" + timestamp + ".log");

    PrintWriter writer = null;
    String log = StringEscapeUtils.unescapeHtml(trace.trim());
    try {
        writer = response.getWriter();
        writer.write(log);
    } catch (IOException ioe) {
        LOGGER.error("Exception while generating trace logs ", ioe);
        throw ioe;
    } finally {

        if (writer != null) {
            writer.flush();
            writer.close();
        }

        response.flushBuffer();
    }
}

From source file:org.kuali.mobility.icons.controllers.WebIconsController.java

/**
 * Get the icon matching all the criteria of the request and write it the the HttpServletResponse.
 *
 * @param iconName Name of the icon to get.
 * @param theme    The theme to get the icon in.
 * @param size     Size to get the icon in.
 * @param request  The HttpServletRequest being handled.
 * @param response The HttpServletResponse that will reply.
 * @throws IOException Thrown if there is an exception creating the icon or writing it to the response.
 */// www.j a v a 2  s  .c  o m
private void writeIconToHttpResponse(String iconName, String theme, int size, HttpServletRequest request,
        HttpServletResponse response) throws IOException {
    long dateChanged = request.getDateHeader("If-Modified-Since") / 1000;
    File imageFile = iconService.getImageFile(iconName, theme, size);

    long mediaChanged = imageFile.lastModified() / 1000;
    if (dateChanged == mediaChanged) {
        response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
        return;
    }
    response.setContentType("image/png");
    InputStream imageInput = new FileInputStream(imageFile);
    response.setDateHeader("Last-Modified", imageFile.lastModified());

    int bytesWritten = IOUtils.copy(imageInput, response.getOutputStream());
    response.setContentLength(bytesWritten);
    response.flushBuffer();
}

From source file:org.fenixedu.spaces.ui.OccupationRequestsController.java

@RequestMapping(value = "/export", method = RequestMethod.GET)
public void exportAnyCampusToExcel(@RequestParam(required = false) Space campus,
        @RequestParam(required = false) OccupationRequestState state, HttpServletResponse response) {
    List<OccupationRequest> requests;

    if (state != null) {
        requests = occupationService.all(state, campus);
    } else {//from   w  ww .  ja va  2 s.c om
        requests = occupationService.getRequestsToProcess(Authenticate.getUser(), campus);
    }

    String filename = bundle.message("label.occupation.request.filename");
    if (campus != null) {
        filename += "_" + campus.getPresentationName();
    }
    response.setContentType("application/vnd.ms-excel");
    response.setHeader("Content-disposition", "attachment; filename=" + filename + ".xls");
    try {
        makeExcel(requests, response.getOutputStream());
        response.flushBuffer();
    } catch (IOException ex) {
        ex.printStackTrace();
    }
}

From source file:nl.strohalm.cyclos.http.RestFilter.java

@Override
@SuppressWarnings("unchecked")
protected void onError(final HttpServletRequest request, final HttpServletResponse response, final Throwable t)
        throws IOException {
    log(request, t);/*w  w  w  .  j  a  v  a  2 s  .  co  m*/
    LOG.error("Error on REST call", t);
    final Pair<ServerErrorVO, Integer> error = RestHelper.resolveError(t);
    final ServerErrorVO vo = error.getFirst();
    final JSONObject json = new JSONObject();
    if (StringUtils.isNotEmpty(vo.getErrorCode())) {
        json.put("errorCode", vo.getErrorCode());
    }
    if (StringUtils.isNotEmpty(vo.getErrorDetails())) {
        json.put("errorDetails", vo.getErrorDetails());
    }
    response.setStatus(error.getSecond());
    response.setContentType("application/json");
    json.writeJSONString(response.getWriter());
    response.flushBuffer();
}