Example usage for javax.servlet ServletOutputStream flush

Introduction

In this page you can find the example usage for javax.servlet ServletOutputStream flush.

Prototype

public void flush() throws IOException 

Source Link

Document

Flushes this output stream and forces any buffered output bytes to be written out.

Usage

From source file:au.org.ala.biocache.web.MapController.java

private void displayBlankImage(int width, int height, boolean useBase, HttpServletResponse response) {
    try {//from   www  .j  av  a  2  s . c  o m
        response.setContentType("image/png");

        BufferedImage baseImage = null;
        if (useBase) {
            baseImage = createBaseMapImage();
        } else {
            baseImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
        }

        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        ImageIO.write(baseImage, "png", outputStream);
        ServletOutputStream outStream = response.getOutputStream();
        outStream.write(outputStream.toByteArray());
        outStream.flush();
        outStream.close();

    } catch (Exception e) {
        logger.error("Unable to write image", e);
    }
}

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From source file:au.org.ala.biocache.web.MapController.java

@RequestMapping(value = "/occurrences/legend", method = RequestMethod.GET)
public void pointLegendImage(
        @RequestParam(value = "colourby", required = false, defaultValue = "0") Integer colourby,
        @RequestParam(value = "width", required = false, defaultValue = "50") Integer widthObj,
        @RequestParam(value = "height", required = false, defaultValue = "50") Integer heightObj,
        HttpServletResponse response) {//from  w  w w .  j a v  a 2s. c om
    try {
        int width = widthObj.intValue();
        int height = heightObj.intValue();

        BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
        Graphics2D g = (Graphics2D) img.getGraphics();

        if (colourby != null) {
            int colour = 0xFF000000 | colourby.intValue();
            Color c = new Color(colour);
            g.setPaint(c);

        } else {
            g.setPaint(Color.blue);
        }

        g.fillOval(0, 0, width, width);

        g.dispose();

        response.setContentType("image/png");
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        ImageIO.write(img, "png", outputStream);
        ServletOutputStream outStream = response.getOutputStream();
        outStream.write(outputStream.toByteArray());
        outStream.flush();
        outStream.close();

    } catch (Exception e) {
        logger.error("Unable to write image", e);
    }
}

---

From source file:net.nan21.dnet.core.web.controller.AbstractDnetController.java

protected void sendFile(InputStream inputStream, ServletOutputStream outputStream, int bufferSize)
        throws IOException {
    try {/*  w w w.  j av  a 2s.  c o  m*/
        byte[] buf = new byte[bufferSize];
        int bytesRead;
        while ((bytesRead = inputStream.read(buf)) != -1) {
            outputStream.write(buf, 0, bytesRead);
        }
    } finally {
        if (inputStream != null)
            inputStream.close();
    }
    outputStream.flush();
}

---

From source file:org.apache.stratos.logging.view.ui.LogViewerClient.java

public void downloadArchivedLogFiles(String logFile, HttpServletResponse response, String domain,
        String serverKey) throws Exception {
    try {//from  w w w  .  ja  va 2  s .  co  m
        logFile = logFile.replace(".gz", "");
        ServletOutputStream outputStream = response.getOutputStream();
        response.setContentType("application/txt");
        response.setHeader("Content-Disposition", "attachment;filename=" + logFile.replaceAll("\\s", "_"));
        DataHandler data = stub.downloadArchivedLogFiles(logFile, domain, serverKey);
        InputStream fileToDownload = data.getInputStream();
        int c;
        while ((c = fileToDownload.read()) != -1) {
            outputStream.write(c);
        }
        outputStream.flush();
        outputStream.flush();
    } catch (Exception e) {
        String msg = "Error occurred while getting logger data. Backend service may be unavailable";
        log.error(msg, e);
        throw e;
    }
}

---

From source file:au.org.ala.biocache.web.MapController.java

/**
 * This method creates and renders a density map legend for a species.
 * /*from   w  w w  .j  a v a2  s. c o  m*/
 * @throws Exception
 */
@RequestMapping(value = "/density/legend", method = RequestMethod.GET)
public @ResponseBody void speciesDensityLegend(SpatialSearchRequestParams requestParams,
        @RequestParam(value = "forceRefresh", required = false, defaultValue = "false") boolean forceRefresh,
        HttpServletRequest request, HttpServletResponse response) throws Exception {

    response.setContentType("image/png");
    File baseDir = new File(heatmapOutputDir);

    String outputHMFile = getOutputFile(request);

    //Does file exist on disk?
    File f = new File(baseDir + "/" + "legend_" + outputHMFile);

    if (!f.isFile() || !f.exists() || forceRefresh) {
        //If not, generate
        logger.debug("regenerating heatmap legend");
        generateStaticHeatmapImages(requestParams, true, false, 0, "0000ff", null, null, 1.0f, request);
    } else {
        logger.debug("legend file already exists on disk, sending file back to user");
    }

    //read file off disk and send back to user
    try {
        File file = new File(baseDir + "/" + "legend_" + outputHMFile);
        //only send the image back if it actually exists - a legend won't exist if we create the map based on points
        if (file.exists()) {
            BufferedImage img = ImageIO.read(file);
            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
            ImageIO.write(img, "png", outputStream);
            ServletOutputStream outStream = response.getOutputStream();
            outStream.write(outputStream.toByteArray());
            outStream.flush();
            outStream.close();
        }

    } catch (Exception e) {
        logger.error("Unable to write image.", e);
    }
}

---

From source file:org.eclipse.userstorage.tests.util.USSServer.java

protected void retrieveBlob(HttpServletRequest request, HttpServletResponse response, File blobFile,
        File etagFile, boolean exists) throws IOException {
    if (!exists) {
        response.sendError(HttpServletResponse.SC_NOT_FOUND);
        return;//ww w  . j  a va  2  s  .  co m
    }

    String etag = IOUtil.readUTF(etagFile);
    String ifNoneMatch = getETag(request, "If-None-Match");
    if (ifNoneMatch != null && ifNoneMatch.equals(etag)) {
        response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
        return;
    }

    response.setStatus(HttpServletResponse.SC_OK);
    response.setContentType("application/json");
    response.setHeader("ETag", "\"" + etag + "\"");

    InputStream body = JSONUtil.build(Collections.singletonMap("value", new FileInputStream(blobFile)));

    try {
        ServletOutputStream out = response.getOutputStream();
        IOUtil.copy(body, out);
        out.flush();
    } finally {
        IOUtil.closeSilent(body);
    }
}

---

From source file:au.org.ala.biocache.web.MapController.java

/**
 * This method creates and renders a density map for a species.
 * /*  w ww. j ava 2  s  .  c o  m*/
 * @throws Exception
 */
@RequestMapping(value = { "/density/map", "/occurrences/static" }, method = RequestMethod.GET)
public @ResponseBody void speciesDensityMap(SpatialSearchRequestParams requestParams,
        @RequestParam(value = "forceRefresh", required = false, defaultValue = "false") boolean forceRefresh,
        @RequestParam(value = "forcePointsDisplay", required = false, defaultValue = "false") boolean forcePointsDisplay,
        @RequestParam(value = "pointColour", required = false, defaultValue = "0000ff") String pointColour,
        @RequestParam(value = "colourByFq", required = false, defaultValue = "") String colourByFqCSV,
        @RequestParam(value = "colours", required = false, defaultValue = "") String coloursCSV,
        @RequestParam(value = "pointHeatMapThreshold", required = false, defaultValue = "500") Integer pointHeatMapThreshold,
        @RequestParam(value = "opacity", required = false, defaultValue = "1.0") Float opacity,
        HttpServletRequest request, HttpServletResponse response) throws Exception {

    response.setContentType("image/png");
    File outputDir = new File(heatmapOutputDir);
    if (!outputDir.exists()) {
        FileUtils.forceMkdir(outputDir);
    }

    //output heatmap path
    String outputHMFile = getOutputFile(request);

    String[] facetValues = null;
    String[] facetColours = null;
    if (StringUtils.trimToNull(colourByFqCSV) != null && StringUtils.trimToNull(coloursCSV) != null) {
        facetValues = colourByFqCSV.split(",");
        facetColours = coloursCSV.split(",");
        if (facetValues.length == 0 || facetValues.length != facetColours.length) {
            throw new IllegalArgumentException(
                    String.format("Mismatch in facet values and colours. Values: %d, Colours: %d",
                            facetValues.length, facetColours.length));
        }
    }

    //Does file exist on disk?
    File f = new File(outputDir + "/" + outputHMFile);

    if (!f.isFile() || !f.exists() || forceRefresh) {
        logger.debug("Regenerating heatmap image");
        //If not, generate
        generateStaticHeatmapImages(requestParams, false, forcePointsDisplay, pointHeatMapThreshold,
                pointColour, facetValues, facetColours, opacity, request);
    } else {
        logger.debug("Heatmap file already exists on disk, sending file back to user");
    }

    try {
        //read file off disk and send back to user
        File file = new File(outputDir + "/" + outputHMFile);
        BufferedImage img = ImageIO.read(file);
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        ImageIO.write(img, "png", outputStream);
        ServletOutputStream outStream = response.getOutputStream();
        outStream.write(outputStream.toByteArray());
        outStream.flush();
        outStream.close();

    } catch (Exception e) {
        logger.error("Unable to write image.", e);
    }
}

---

From source file:org.eclipse.userstorage.tests.util.USSServer.java

protected void login(HttpServletRequest request, HttpServletResponse response) throws IOException {
    Map<String, Object> requestObject = JSONUtil.parse(request.getInputStream(), null);

    String username = (String) requestObject.get("username");
    String password = (String) requestObject.get("password");

    User user = users.get(username);/*w  ww .ja v  a 2s.  c o m*/
    if (user == null || password == null || !password.equals(user.getPassword())) {
        response.sendError(HttpServletResponse.SC_UNAUTHORIZED);
        return;
    }

    response.setStatus(HttpServletResponse.SC_OK);
    response.setContentType("application/json");

    Session session = addSession(user);
    Cookie cookie = new Cookie("SESSION", session.getID());
    cookie.setPath("/");
    response.addCookie(cookie);

    Map<String, Object> responseObject = new LinkedHashMap<String, Object>();
    responseObject.put("sessid", session.getID());
    responseObject.put("token", session.getCSRFToken());
    InputStream body = JSONUtil.build(responseObject);

    try {
        ServletOutputStream out = response.getOutputStream();
        IOUtil.copy(body, out);
        out.flush();
    } finally {
        IOUtil.closeSilent(body);
    }
}

---

From source file:net.sourceforge.fenixedu.presentationTier.Action.student.onlineTests.StudentTestsAction.java

public ActionForward exportChecksum(ActionMapping mapping, ActionForm form, HttpServletRequest request,
        HttpServletResponse response) throws Exception {
    final String logId = request.getParameter("logId");
    final User userView = getUserView(request);
    if (logId != null && logId.length() != 0) {
        StudentTestLog studentTestLog = FenixFramework.getDomainObject(logId);
        if (studentTestLog.getStudent().getPerson().equals(userView.getPerson())) {
            List<StudentTestLog> studentTestLogs = new ArrayList<StudentTestLog>();
            studentTestLogs.add(studentTestLog);
            byte[] data = ReportsUtils.exportToPdfFileAsByteArray(
                    "net.sourceforge.fenixedu.domain.onlineTests.StudentTestLog.checksumReport", null,
                    studentTestLogs);//from  www .j  ava 2s . c  o m
            response.setContentType("application/pdf");
            response.addHeader("Content-Disposition",
                    "attachment; filename=" + studentTestLog.getStudent().getNumber() + ".pdf");
            response.setContentLength(data.length);
            ServletOutputStream writer = response.getOutputStream();
            writer.write(data);
            writer.flush();
            writer.close();
            response.flushBuffer();
            return mapping.findForward("");
        }
    }
    return null;
}

---

From source file:org.fenixedu.academic.ui.struts.action.student.onlineTests.StudentTestsAction.java

public ActionForward exportChecksum(ActionMapping mapping, ActionForm form, HttpServletRequest request,
        HttpServletResponse response) throws Exception {
    final String logId = request.getParameter("logId");
    final User userView = getUserView(request);
    if (logId != null && logId.length() != 0) {
        StudentTestLog studentTestLog = FenixFramework.getDomainObject(logId);
        if (studentTestLog.getStudent().getPerson().equals(userView.getPerson())) {
            List<StudentTestLog> studentTestLogs = new ArrayList<StudentTestLog>();
            studentTestLogs.add(studentTestLog);
            byte[] data = ReportsUtils
                    .generateReport("org.fenixedu.academic.domain.onlineTests.StudentTestLog.checksumReport",
                            null, studentTestLogs)
                    .getData();/*  w  ww.  j  a  va  2 s .  c  o  m*/
            response.setContentType("application/pdf");
            response.addHeader("Content-Disposition",
                    "attachment; filename=" + studentTestLog.getStudent().getNumber() + ".pdf");
            response.setContentLength(data.length);
            ServletOutputStream writer = response.getOutputStream();
            writer.write(data);
            writer.flush();
            writer.close();
            response.flushBuffer();
            return mapping.findForward("");
        }
    }
    return null;
}

---

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