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:com.mmj.app.web.controller.user.UserController.java

@RequestMapping(value = "/gozapIdentifyCode")
public ModelAndView gozapIdentifyCode(String t, HttpServletRequest request, HttpServletResponse response) {

    response.setContentType("image/png; charset=utf-8");
    response.setHeader("Pragma", "no-cache");
    response.setHeader("Cache-Control",
            "private, must-revalidate,no-store, no-cache, must-revalidate,post-check=0, pre-check=0");
    response.addHeader("Content-Disposition", "attachment; filename=\"" + "gozapIdentifyCode" + "\"");
    response.setCharacterEncoding("UTF-8");

    final byte[] bytes = WebsiteCheckCodeManager.INSTANCE.create(CookieManagerLocator.get(request, response),
            response);//from  w ww .ja  v  a  2s  .c  o  m

    OutputStream os;
    try {
        os = response.getOutputStream();
        IOUtils.write(bytes, os);
        response.flushBuffer();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return null;
}

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From source file:org.dataconservancy.dcs.access.server.BagUploadServlet.java

public void getSIPfile(String bagitEp, String filename, HttpServletResponse resp)
        throws IOException, InvalidXmlException {
    Client client = Client.create();/*from  ww w  .j  ava 2  s .  co m*/
    System.out.println(bagitEp);
    WebResource webResource = client.resource(bagitEp);

    File file = new File(filename);
    FileDataBodyPart fdp = new FileDataBodyPart("file", file, MediaType.APPLICATION_OCTET_STREAM_TYPE);

    FormDataMultiPart formDataMultiPart = new FormDataMultiPart();

    formDataMultiPart.bodyPart(fdp);

    ClientResponse response = webResource.path("sip").type(MediaType.MULTIPART_FORM_DATA)
            .post(ClientResponse.class, formDataMultiPart);

    if (response.getStatus() == 500) {
        StringWriter writer = new StringWriter();
        IOUtils.copy(response.getEntityInputStream(), writer);
        resp.getWriter().write(writer.toString());
        resp.setStatus(500);
        resp.flushBuffer();
        return;
    }
    String sipPath = System.getProperty("java.io.tmpdir") + "/" + UUID.randomUUID().toString() + "_sip_0.xml";// significance of 0 is limiting

    IOUtils.copy(response.getEntityInputStream(), new FileOutputStream(sipPath));
    ResearchObject sip = new SeadXstreamStaxModelBuilder().buildSip(new FileInputStream(sipPath));

    StringWriter tempWriter = new StringWriter();
    siptoJsonConverter().toXML(toQueryResult(sip), tempWriter);
    tempWriter.append(";" + sipPath);
    resp.getWriter().write(tempWriter.toString());
    //  resp.setHeader("localSipPath", sipPath);
    resp.setStatus(200);
    resp.setContentType("application/json");
    resp.flushBuffer();
}

---

From source file:com.almende.eve.transport.http.AgentServlet.java

/**
 * Send a JSON-RPC message to an agent Usage: POST /servlet/{agentId} With a
 * JSON-RPC request as body. Response will be a JSON-RPC response.
 * /*from w  ww.  java  2 s  .  c  om*/
 * @param req
 *            the req
 * @param resp
 *            the resp
 * @throws IOException
 *             Signals that an I/O exception has occurred.
 * @throws ServletException
 *             the servlet exception
 */
@Override
public void doPost(final HttpServletRequest req, final HttpServletResponse resp)
        throws IOException, ServletException {

    // retrieve the agent url and the request body
    final String body = StringUtil.streamToString(req.getInputStream());

    final String agentUrl = req.getRequestURI();
    String agentId;
    try {
        agentId = httpTransport.getAgentId(new URI(agentUrl));
    } catch (URISyntaxException e) {
        throw new ServletException(AGENTURLWARNING, e);
    }
    if (agentId == null || agentId.equals("")) {
        resp.sendError(HttpServletResponse.SC_BAD_REQUEST, "No agentId found in url.");
        resp.flushBuffer();
        return;
    }

    if (host.hasPrivate(agentId) && !handleSession(req, resp)) {
        if (!resp.isCommitted()) {
            resp.sendError(HttpServletResponse.SC_UNAUTHORIZED);
        }
        resp.flushBuffer();
        return;
    }

    // Attach the claimed senderId, or null if not given.
    String senderUrl = req.getHeader("X-Eve-SenderUrl");
    if (senderUrl == null || senderUrl.equals("")) {
        senderUrl = "web://" + req.getRemoteUser() + "@" + req.getRemoteAddr();
    }
    final String tag = new UUID().toString();

    final SyncCallback<String> callback = new SyncCallback<String>();

    final AsyncCallbackQueue<String> callbacks = host.getCallbackQueue("HttpTransport", String.class);
    callbacks.push(tag, "", callback);
    //TODO: check if it's base64 encoded data, decode to byte[] and call receive byte[].
    host.receive(agentId, body, URI.create(senderUrl), tag);

    try {
        final Object message = callback.get();
        // return response
        resp.addHeader("Content-Type", "application/json");
        resp.getWriter().println(message.toString());
        resp.getWriter().close();
    } catch (final Exception e) {
        LOG.log(Level.WARNING, "Http Sync receive raised exception.", e);
        resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
                "Receiver raised exception:" + e.getMessage());
    }
    resp.flushBuffer();
}

---

From source file:org.fenixedu.academic.ui.struts.action.internationalRelatOffice.candidacy.erasmus.ErasmusIndividualCandidacyProcessDA.java

public ActionForward retrieveLearningAgreement(ActionMapping mapping, ActionForm form,
        HttpServletRequest request, HttpServletResponse response) throws Exception {
    MobilityIndividualApplicationProcess process = getProcess(request);

    final LearningAgreementDocument document = new LearningAgreementDocument(process);
    byte[] data = ReportsUtils.generateReport(document).getData();

    response.setContentLength(data.length);
    response.setContentType("application/pdf");
    response.addHeader("Content-Disposition", "attachment; filename=" + document.getReportFileName() + ".pdf");

    final ServletOutputStream writer = response.getOutputStream();
    writer.write(data);//ww  w  .j  av a2s  .c om
    writer.flush();
    writer.close();

    response.flushBuffer();
    return mapping.findForward("");
}

---

From source file:net.sourceforge.fenixedu.presentationTier.Action.internationalRelatOffice.candidacy.erasmus.ErasmusIndividualCandidacyProcessDA.java

public ActionForward retrieveLearningAgreement(ActionMapping mapping, ActionForm form,
        HttpServletRequest request, HttpServletResponse response) throws Exception {
    MobilityIndividualApplicationProcess process = getProcess(request);

    final LearningAgreementDocument document = new LearningAgreementDocument(process);
    byte[] data = ReportsUtils.exportMultipleToPdfAsByteArray(document);

    response.setContentLength(data.length);
    response.setContentType("application/pdf");
    response.addHeader("Content-Disposition", "attachment; filename=" + document.getReportFileName() + ".pdf");

    final ServletOutputStream writer = response.getOutputStream();
    writer.write(data);/*from  w w w.  j av a  2 s. c o m*/
    writer.flush();
    writer.close();

    response.flushBuffer();
    return mapping.findForward("");
}

---

From source file:org.epics.archiverappliance.utils.ui.GetUrlContent.java

/**
 * Get the contents of a redirect URL and use as reponse for the provided HttpServletResponse.
 * If possible, pass in error responses as well.
 * @param redirectURIStr     /*from ww  w  .j a va2  s  .c  om*/
 * @param resp  HttpServletResponse 
 * @throws IOException    
 */
public static void proxyURL(String redirectURIStr, HttpServletResponse resp) throws IOException {
    CloseableHttpClient httpclient = HttpClients.createDefault();
    HttpGet getMethod = new HttpGet(redirectURIStr);
    getMethod.addHeader("Connection", "close"); // https://www.nuxeo.com/blog/using-httpclient-properly-avoid-closewait-tcp-connections/
    try (CloseableHttpResponse response = httpclient.execute(getMethod)) {
        if (response.getStatusLine().getStatusCode() == 200) {
            HttpEntity entity = response.getEntity();

            HashSet<String> proxiedHeaders = new HashSet<String>();
            proxiedHeaders.addAll(Arrays.asList(MimeResponse.PROXIED_HEADERS));
            Header[] headers = response.getAllHeaders();
            for (Header header : headers) {
                if (proxiedHeaders.contains(header.getName())) {
                    logger.debug("Adding headerName " + header.getName() + " and value " + header.getValue()
                            + " when proxying request");
                    resp.addHeader(header.getName(), header.getValue());
                }
            }

            if (entity != null) {
                logger.debug("Obtained a HTTP entity of length " + entity.getContentLength());
                try (OutputStream os = resp.getOutputStream();
                        InputStream is = new BufferedInputStream(entity.getContent())) {
                    byte buf[] = new byte[10 * 1024];
                    int bytesRead = is.read(buf);
                    while (bytesRead > 0) {
                        os.write(buf, 0, bytesRead);
                        resp.flushBuffer();
                        bytesRead = is.read(buf);
                    }
                }
            } else {
                throw new IOException("HTTP response did not have an entity associated with it");
            }
        } else {
            logger.error("Invalid status code " + response.getStatusLine().getStatusCode()
                    + " when connecting to URL " + redirectURIStr + ". Sending the errorstream across");
            try (ByteArrayOutputStream os = new ByteArrayOutputStream()) {
                try (InputStream is = new BufferedInputStream(response.getEntity().getContent())) {
                    byte buf[] = new byte[10 * 1024];
                    int bytesRead = is.read(buf);
                    while (bytesRead > 0) {
                        os.write(buf, 0, bytesRead);
                        bytesRead = is.read(buf);
                    }
                }
                resp.addHeader(MimeResponse.ACCESS_CONTROL_ALLOW_ORIGIN, "*");
                resp.sendError(response.getStatusLine().getStatusCode(), new String(os.toByteArray()));
            }
        }
    }
}

---

From source file:net.sourceforge.fenixedu.presentationTier.Action.commons.delegates.DelegatesManagementDispatchAction.java

public ActionForward exportToXLS(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request,
        HttpServletResponse response) throws FenixServiceException {

    ExecutionYear currentExecutionYear = ExecutionYear.readCurrentExecutionYear();
    try {/*from ww w .ja  v a2  s  .c o m*/
        String filename = getResourceMessage("delegates.section") + "_" + currentExecutionYear.getYear();

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

        exportDelegatesToXLS(currentExecutionYear, writer);
        writer.flush();
        response.flushBuffer();
        return null;

    } catch (IOException e) {
        throw new FenixServiceException();
    }
}

---

From source file:net.sourceforge.fenixedu.presentationTier.Action.resourceAllocationManager.ShiftDistributionFirstYearDA.java

public ActionForward exportStatistics(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request,
        HttpServletResponse response) throws Exception {

    ShiftDistributionFileBean fileBean = getRenderedObject();
    Spreadsheet spreadsheet = getStatisticsFromShiftDistribution(fileBean.getDistribution(),
            fileBean.getAbstractStudentNumbers());

    response.setHeader("Content-Disposition",
            "attachment; filename=estatisticas_distribuicao" + new DateTime() + ".csv");
    final ServletOutputStream writer = response.getOutputStream();
    spreadsheet.exportToCSV(writer, COLUMN_SEPARATOR, LINE_SEPARATOR);
    writer.flush();/*from  w w w. j  a va2s  .c  o m*/
    response.flushBuffer();
    return null;
}

---

From source file:net.lightbody.bmp.proxy.jetty.jetty.servlet.Default.java

public void handlePut(HttpServletRequest request, HttpServletResponse response, String pathInContext,
        Resource resource) throws ServletException, IOException {
    boolean exists = resource != null && resource.exists();
    if (exists && !passConditionalHeaders(request, response, resource))
        return;/*  w ww .j  av  a2 s.  c  om*/

    if (pathInContext.endsWith("/")) {
        if (!exists) {
            if (!resource.getFile().mkdirs())
                response.sendError(HttpResponse.__403_Forbidden, "Directories could not be created");
            else {
                response.setStatus(HttpResponse.__201_Created);
                response.flushBuffer();
            }
        } else {
            response.setStatus(HttpResponse.__200_OK);
            response.flushBuffer();
        }
    } else {
        try {
            int toRead = request.getContentLength();
            InputStream in = request.getInputStream();
            OutputStream out = resource.getOutputStream();
            if (toRead >= 0)
                IO.copy(in, out, toRead);
            else
                IO.copy(in, out);
            out.close();

            response.setStatus(exists ? HttpResponse.__200_OK : HttpResponse.__201_Created);
            response.flushBuffer();
        } catch (Exception ex) {
            log.warn(LogSupport.EXCEPTION, ex);
            response.sendError(HttpResponse.__403_Forbidden, ex.getMessage());
        }
    }
}

---

From source file:org.apache.sentry.provider.db.service.thrift.LogLevelServlet.java

/**
 * Parse the class name and log level in the http servlet request.
 * If the request contains only class name, return the log level in the response message.
 * If the request contains both class name and level, set the log level to the requested level
 * and return the setting result in the response message.
 *///  w  w  w. j ava  2s .  c om
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    String logName = getParameter(request, "log");
    String level = getParameter(request, "level");
    response.setContentType("text/html;charset=utf-8");
    response.setStatus(HttpServletResponse.SC_OK);
    PrintWriter out = response.getWriter();

    if (logName != null) {
        Logger logInstance = LogManager.getLogger(logName);
        if (level == null) {
            out.write(
                    String.format(FORMS_GET, escapeHtml(logName), logInstance.getEffectiveLevel().toString()));
        } else if (isLogLevelValid(level)) {
            logInstance.setLevel(Level.toLevel(level));
            out.write(String.format(FORMS_SET, escapeHtml(logName), level, level,
                    logInstance.getEffectiveLevel().toString()));
        } else {
            response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Invalid log level: " + level);
            return;
        }
    }
    out.write(FORMS_END);
    out.close();
    response.flushBuffer();
}

---

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