Example usage for javax.servlet ServletOutputStream write

List of usage examples for javax.servlet ServletOutputStream write

  1. HOME
  2. Java
  3. javax
  4. javax.servlet.*
  5. ServletOutputStream
  6. write

Introduction

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

Prototype

public abstract void write(int b) throws IOException;

Source Link

Document

Writes the specified byte to this output stream.

Usage

From source file:org.opencms.frontend.templateone.form.CmsCaptchaField.java

/**
 * Writes a Captcha JPEG image to the servlet response output stream.
 * <p>/*from   w  w w .  j  a v  a 2s  .c o  m*/
 * 
 * @param cms an initialized Cms JSP action element
 * @throws IOException if something goes wrong
 */
public void writeCaptchaImage(CmsJspActionElement cms) throws IOException {

    ByteArrayOutputStream captchaImageOutput = new ByteArrayOutputStream();
    ServletOutputStream out = null;
    BufferedImage captchaImage = null;
    int maxTries = 10;
    do {
        try {

            maxTries--;
            String sessionId = cms.getRequest().getSession().getId();
            Locale locale = cms.getRequestContext().getLocale();

            captchaImage = CmsCaptchaServiceCache.getSharedInstance()
                    .getCaptchaService(m_captchaSettings, cms.getCmsObject())
                    .getImageChallengeForID(sessionId, locale);
        } catch (CaptchaException cex) {
            if (LOG.isErrorEnabled()) {
                LOG.error(cex);
                LOG.error(Messages.get().getBundle().key(Messages.LOG_ERR_CAPTCHA_CONFIG_IMAGE_SIZE_2,
                        new Object[] { m_captchaSettings.getPresetPath(), new Integer(maxTries) }));
            }
            m_captchaSettings.setImageHeight(m_captchaSettings.getImageHeight() + 40);
            m_captchaSettings.setImageWidth(m_captchaSettings.getImageWidth() + 80);
        }
    } while (captchaImage == null && maxTries > 0);
    try {

        ImageIO.write(captchaImage, "jpg", captchaImageOutput);
        CmsFlexController controller = CmsFlexController.getController(cms.getRequest());
        HttpServletResponse response = controller.getTopResponse();
        response.setHeader("Cache-Control", "no-store");
        response.setHeader("Pragma", "no-cache");
        response.setDateHeader("Expires", 0);
        response.setContentType("image/jpeg");

        out = cms.getResponse().getOutputStream();
        out.write(captchaImageOutput.toByteArray());
        out.flush();

    } catch (Exception e) {

        if (LOG.isErrorEnabled()) {
            LOG.error(e.getLocalizedMessage(), e);
        }

        cms.getResponse().sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
    } finally {

        try {
            if (out != null) {
                out.close();
            }
        } catch (Throwable t) {
            // intentionally left blank
        }
    }
}

From source file:net.sf.appstatus.web.pages.ServicesPage.java

@Override
public void doGet(StatusWebHandler webHandler, HttpServletRequest req, HttpServletResponse resp)
        throws UnsupportedEncodingException, IOException {

    setup(resp, "text/html");
    ServletOutputStream os = resp.getOutputStream();

    Map<String, String> valuesMap = new HashMap<String, String>();

    List<IService> services = webHandler.getAppStatus().getServices();
    Collections.sort(services);/*from  w  w w.  jav a  2 s.  c o m*/

    StrBuilder sbServicesTable = new StrBuilder();

    if (HtmlUtils.generateBeginTable(sbServicesTable, services.size())) {

        HtmlUtils.generateHeaders(sbServicesTable, "", "Group", "Name", "Hits", "Cache", "Running", "min",
                "max", "avg", "nested", "min (c)", "max (c)", "avg (c)", "nested (c)", "Errors", "Failures",
                "Hit rate");

        for (IService service : services) {
            HtmlUtils.generateRow(sbServicesTable, Resources.STATUS_JOB, service.getGroup(), service.getName(),
                    service.getHits(),
                    service.getCacheHits() + getPercent(service.getCacheHits(), service.getHits()),
                    service.getRunning(), service.getMinResponseTime(), service.getMaxResponseTime(),
                    Math.round(service.getAvgResponseTime()), Math.round(service.getAvgNestedCalls()),
                    service.getMinResponseTimeWithCache(), service.getMaxResponseTimeWithCache(),
                    Math.round(service.getAvgResponseTimeWithCache()),
                    Math.round(service.getAvgNestedCallsWithCache()),
                    service.getErrors() + getPercent(service.getErrors(), service.getHits()),
                    service.getFailures() + getPercent(service.getFailures(), service.getHits()),
                    getRate(service.getCurrentRate()));
        }

        HtmlUtils.generateEndTable(sbServicesTable, services.size());
    }

    // generating content
    valuesMap.put("servicesTable", sbServicesTable.toString());
    String content = HtmlUtils.applyLayout(valuesMap, PAGECONTENTLAYOUT);

    valuesMap.clear();
    valuesMap.put("content", content);
    // generating page
    os.write(getPage(webHandler, valuesMap).getBytes(ENCODING));
}

From source file:org.wso2.carbon.bpel.ui.bpel2svg.SVGGenerateServlet.java

/**
 * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
 * Handles the HTTP process request which creates the SVG graph for a bpel process
 *
 * @param request  servlet request//from   w w w .  ja va  2 s. c om
 * @param response servlet response
 * @throws ServletException if a servlet-specific error occurs
 * @throws IOException      if an I/O error occurs
 */
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

    Log log = LogFactory.getLog(SVGGenerateServlet.class);
    HttpSession session = request.getSession(true);
    //Get the bpel process id
    String pid = CharacterEncoder.getSafeText(request.getParameter("pid"));
    ServletConfig config = getServletConfig();
    String backendServerURL = CarbonUIUtil.getServerURL(config.getServletContext(), session);
    ConfigurationContext configContext = (ConfigurationContext) config.getServletContext()
            .getAttribute(CarbonConstants.CONFIGURATION_CONTEXT);
    String cookie = (String) session.getAttribute(ServerConstants.ADMIN_SERVICE_COOKIE);
    String processDef = null;
    ProcessManagementServiceClient client = null;
    SVGInterface svg = null;
    String svgStr = null;
    ServletOutputStream sos = null;
    sos = response.getOutputStream();
    try {
        client = new ProcessManagementServiceClient(cookie, backendServerURL, configContext,
                request.getLocale());
        //Gets the bpel process definition needed to create the SVG from the processId
        processDef = client.getProcessInfo(QName.valueOf(pid)).getDefinitionInfo().getDefinition()
                .getExtraElement().toString();

        BPELInterface bpel = new BPELImpl();
        //Converts the bpel process definition to an omElement which is how the AXIS2 Object Model (AXIOM)
        // represents an XML document
        OMElement bpelStr = bpel.load(processDef);

        /**
         * Process the OmElement containing the bpel process definition
         * Process the subactivites of the bpel process by iterating through the omElement
         * */
        bpel.processBpelString(bpelStr);

        //Create a new instance of the LayoutManager for the bpel process
        LayoutManager layoutManager = BPEL2SVGFactory.getInstance().getLayoutManager();
        //Set the layout of the SVG to vertical
        layoutManager.setVerticalLayout(true);
        //Get the root activity i.e. the Process Activity
        layoutManager.layoutSVG(bpel.getRootActivity());

        svg = new SVGImpl();
        //Set the root activity of the SVG i.e. the Process Activity
        svg.setRootActivity(bpel.getRootActivity());
        //Set the content type of the HTTP response as "image/svg+xml"
        response.setContentType("image/svg+xml");
        //Get the SVG graph created for the process as a SVG string
        svgStr = svg.generateSVGString();
        //Checks whether the SVG string generated contains a value
        if (svgStr != null) {
            // stream to write binary data into the response
            sos.write(svgStr.getBytes(Charset.defaultCharset()));
            sos.flush();
            sos.close();
        }
    } catch (ProcessManagementException e) {
        log.error("SVG Generation Error", e);
        String errorSVG = "<svg version=\"1.1\"\n"
                + "     xmlns=\"http://www.w3.org/2000/svg\"><text y=\"50\">Could not display SVG</text></svg>";
        sos.write(errorSVG.getBytes(Charset.defaultCharset()));
        sos.flush();
        sos.close();
    }

}

From source file:org.oscarehr.document.web.ManageDocumentAction.java

public ActionForward getPage(ActionMapping mapping, ActionForm form, HttpServletRequest request,
        HttpServletResponse response, int pageNum) {
    ServletOutputStream outs = null;
    BufferedInputStream bfis = null;
    try {//from w w w. ja v a  2s  .  c  o  m
        String doc_no = request.getParameter("doc_no");
        log.debug("Document No :" + doc_no);

        LogAction.addLog((String) request.getSession().getAttribute("user"), LogConst.READ,
                LogConst.CON_DOCUMENT, doc_no, request.getRemoteAddr());

        Document d = documentDAO.getDocument(doc_no);
        log.debug("Document Name :" + d.getDocfilename());

        outs = response.getOutputStream();
        if (d.getContenttype().equals("application/pdf")) {
            File outfile = hasCacheVersion(d, pageNum);
            if (outfile == null) {
                log.debug("No Cache Version");
                outfile = createCacheVersion(d, pageNum);
            } else {
                log.debug("THERE WAS A CACHE Version " + outfile);
            }

            response.setContentType("image/png");
            //read the file name.
            response.setHeader("Content-Disposition", "attachment;filename=" + d.getDocfilename());
            bfis = new BufferedInputStream(new FileInputStream(outfile));
            int data;
            while ((data = bfis.read()) != -1) {
                outs.write(data);
            }
            bfis.close();

        } else {
            File outfile = new File(EDocUtil.getDocumentPath(d.getDocfilename()));

            response.setContentType(d.getContenttype());
            response.setHeader("Content-Disposition", "attachment;filename=" + d.getDocfilename());

            bfis = new BufferedInputStream(new FileInputStream(outfile));
            int data;
            while ((data = bfis.read()) != -1) {
                outs.write(data);
            }
        }
        outs.flush();
    } catch (java.net.SocketException se) {
        MiscUtils.getLogger().error("Error", se);
    } catch (Exception e) {
        MiscUtils.getLogger().error("Error", e);
    } finally {
        if (bfis != null)
            try {
                bfis.close();
            } catch (IOException e) {
            }
        if (outs != null)
            try {
                outs.close();
            } catch (IOException e) {
            }
    }
    return null;
}

From source file:org.structr.pdf.servlet.PdfServlet.java

@Override
protected void renderAsyncOutput(HttpServletRequest request, HttpServletResponse response, App app,
        RenderContext renderContext, DOMNode rootElement) throws IOException {
    final AsyncContext async = request.startAsync();
    final ServletOutputStream out = async.getResponse().getOutputStream();
    final AtomicBoolean finished = new AtomicBoolean(false);
    final DOMNode rootNode = rootElement;

    response.setContentType("application/pdf");
    response.setHeader("Content-Disposition", "attachment;filename=\"FileName.pdf\"");

    threadPool.submit(new Runnable() {

        @Override/*  w w w  .j  av a2s.  c  om*/
        public void run() {

            try (final Tx tx = app.tx()) {

                // render
                rootNode.render(renderContext, 0);
                finished.set(true);

                tx.success();

            } catch (Throwable t) {

                t.printStackTrace();
                logger.warn("Error while rendering page {}: {}", rootNode.getName(), t.getMessage());

                try {

                    response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
                    finished.set(true);

                } catch (IOException ex) {
                    logger.warn("", ex);
                }
            }
        }

    });

    // start output write listener
    out.setWriteListener(new WriteListener() {

        @Override
        public void onWritePossible() throws IOException {

            try {

                final Queue<String> queue = renderContext.getBuffer().getQueue();
                String pageContent = "";
                while (out.isReady()) {

                    String buffer = null;

                    synchronized (queue) {
                        buffer = queue.poll();
                    }

                    if (buffer != null) {

                        pageContent += buffer;

                    } else {

                        if (finished.get()) {

                            // TODO: implement parameters for wkhtmltopdf in settings

                            Pdf pdf = new Pdf();
                            pdf.addPageFromString(pageContent);

                            out.write(pdf.getPDF());

                            async.complete();

                            // prevent this block from being called again
                            break;
                        }

                        Thread.sleep(1);
                    }
                }

            } catch (EofException ee) {
                logger.warn(
                        "Could not flush the response body content to the client, probably because the network connection was terminated.");
            } catch (IOException | InterruptedException t) {
                logger.warn("Unexpected exception", t);
            }
        }

        @Override
        public void onError(Throwable t) {
            if (t instanceof EofException) {
                logger.warn(
                        "Could not flush the response body content to the client, probably because the network connection was terminated.");
            } else {
                logger.warn("Unexpected exception", t);
            }
        }
    });
}

From source file:org.oscarehr.document.web.ManageDocumentAction.java

public ActionForward viewDocPage(ActionMapping mapping, ActionForm form, HttpServletRequest request,
        HttpServletResponse response) {/*from  ww w.j a v  a2 s  . com*/
    log.debug("in viewDocPage");
    ServletOutputStream outs = null;
    BufferedInputStream bfis = null;
    try {
        String doc_no = request.getParameter("doc_no");
        String pageNum = request.getParameter("curPage");
        if (pageNum == null) {
            pageNum = "0";
        }
        Integer pn = Integer.parseInt(pageNum);
        log.debug("Document No :" + doc_no);
        LogAction.addLog((String) request.getSession().getAttribute("user"), LogConst.READ,
                LogConst.CON_DOCUMENT, doc_no, request.getRemoteAddr());

        Document d = documentDAO.getDocument(doc_no);
        log.debug("Document Name :" + d.getDocfilename());
        String name = d.getDocfilename() + "_" + pn + ".png";
        log.debug("name " + name);

        File outfile = null;
        outs = response.getOutputStream();

        if (d.getContenttype().contains("pdf")) {
            outfile = hasCacheVersion2(d, pn);
            if (outfile != null) {
                log.debug("got cached doc " + d.getDocfilename() + " from local cache");
            } else {
                outfile = createCacheVersion2(d, pn);
                if (outfile != null) {
                    log.debug("cache doc " + d.getDocfilename());
                }
            }
            response.setContentType("image/png");
            bfis = new BufferedInputStream(new FileInputStream(outfile));
            int data;
            while ((data = bfis.read()) != -1) {
                outs.write(data);
                // outs.flush();
            }
        } else if (d.getContenttype().contains("image")) {
            outfile = new File(EDocUtil.getDocumentPath(d.getDocfilename()));
            response.setContentType(d.getContenttype());
            response.setContentLength((int) outfile.length());
            response.setHeader("Content-Disposition", "inline; filename=" + d.getDocfilename());

            bfis = new BufferedInputStream(new FileInputStream(outfile));

            byte[] buffer = new byte[1024];
            int bytesRead = 0;
            while ((bytesRead = bfis.read(buffer)) != -1) {
                outs.write(buffer, 0, bytesRead);
            }
        }
        response.setHeader("Content-Disposition", "attachment;filename=" + d.getDocfilename());

        outs.flush();
    } catch (java.net.SocketException se) {
        MiscUtils.getLogger().error("Error", se);
    } catch (Exception e) {
        MiscUtils.getLogger().error("Error", e);
    } finally {
        if (bfis != null)
            try {
                bfis.close();
            } catch (IOException e) {
            }
        if (outs != null)
            try {
                outs.close();
            } catch (IOException e) {
            }
    }
    return null;
}

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

private void writeBytes(HttpServletResponse response, byte[] bytes) throws IOException {
    response.setContentType("text/plain");
    response.setCharacterEncoding("UTF-8");
    ServletOutputStream outStream = response.getOutputStream();
    outStream.write(bytes);
    outStream.flush();/*from w  w  w .  j a  va 2  s . c o m*/
    outStream.close();
}

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

void displayBlankImage(HttpServletResponse response) {
    try {//from w w  w.j  a  v a2  s  .  c o  m
        ServletOutputStream outStream = response.getOutputStream();
        outStream.write(blankImageBytes);
        outStream.flush();
        outStream.close();
    } catch (Exception e) {
        logger.error("Unable to write image", e);
    }
}

From source file:net.sf.appstatus.web.pages.StatusPage.java

public void doGetHTML(StatusWebHandler webHandler, HttpServletRequest req, HttpServletResponse resp)
        throws UnsupportedEncodingException, IOException {

    setup(resp, "text/html");
    ServletOutputStream os = resp.getOutputStream();

    Map<String, String> valuesMap = new HashMap<String, String>();
    List<ICheckResult> results = webHandler.getAppStatus().checkAll(req.getLocale());
    Collections.sort(results);//from www .java  2s .  c o m
    boolean statusOk = true;
    int statusCode = 200;
    for (ICheckResult r : results) {
        if (r.getCode() != ICheckResult.OK && r.isFatal()) {
            resp.setStatus(500);
            statusCode = 500;
            statusOk = false;
            break;
        }
    }

    valuesMap.put("statusOk", String.valueOf(statusOk));
    valuesMap.put("statusCode", String.valueOf(statusCode));

    // STATUS TABLE
    StrBuilder sbStatusTable = new StrBuilder();
    if (HtmlUtils.generateBeginTable(sbStatusTable, results.size())) {

        HtmlUtils.generateHeaders(sbStatusTable, "", "Group", "Name", "Description", "Code", "Resolution");

        for (ICheckResult r : results) {
            HtmlUtils.generateRow(sbStatusTable, getStatus(r), r.getGroup(), r.getProbeName(),
                    r.getDescription(), String.valueOf(r.getCode()), r.getResolutionSteps());
        }
        HtmlUtils.generateEndTable(sbStatusTable, results.size());
    }
    valuesMap.put("statusTable", sbStatusTable.toString());

    // PROPERTIES TABLE
    StrBuilder sbPropertiesTable = new StrBuilder();
    Map<String, Map<String, String>> properties = webHandler.getAppStatus().getProperties();
    if (HtmlUtils.generateBeginTable(sbPropertiesTable, properties.size())) {

        HtmlUtils.generateHeaders(sbPropertiesTable, "", "Group", "Name", "Value");

        for (Entry<String, Map<String, String>> cat : properties.entrySet()) {
            String category = cat.getKey();

            for (Entry<String, String> r : cat.getValue().entrySet()) {
                HtmlUtils.generateRow(sbPropertiesTable, Resources.STATUS_PROP, category, r.getKey(),
                        r.getValue());
            }

        }
        HtmlUtils.generateEndTable(sbPropertiesTable, properties.size());
    }
    valuesMap.put("propertiesTable", sbPropertiesTable.toString());
    String content = HtmlUtils.applyLayout(valuesMap, PAGECONTENTLAYOUT);

    valuesMap.clear();
    valuesMap.put("content", content);
    os.write(getPage(webHandler, valuesMap).getBytes(ENCODING));
}

From source file:es.juntadeandalucia.panelGestion.presentacion.controlador.impl.GeosearchController.java

/**
 * This method /*  w  w w. j a v  a  2  s.co m*/
 * TODO
 *
 * Para realizar la configuracin se obtienen los archivos de configuracin
 * se realizan las modificaciones necesarias y se le facilita al usuario
 * dichos archivos para que finalice l el procedimiento de configuracin.
 * Las ltimas versiones de Solr admiten modificaciones del Schema a travs
 * de un API REST pero consideramos lioso realizar por un lado la configuracin
 * del schema mediante API y transparente al usuario y por otro lado darle los
 * archivos al usuario para que los sustituya en Geosearch.
 * 
 * @see https://wiki.apache.org/solr/SchemaRESTAPI
 */
public void downloadConfig() {
    String errorMessage = null;

    ServletOutputStream os = null;

    try {
        // checks
        // checks if specified a table
        if (tables.isEmpty()) {
            throw new Exception("No se ha especificado ninguna tabla");
        }
        // checks if specified a field
        boolean specifiedField = false;
        tables_loop: for (GeosearchTableVO table : tables) {
            List<GeosearchFieldVO> fields = table.getFields();
            for (GeosearchFieldVO field : fields) {
                if (field.isDefined()) {
                    specifiedField = true;
                    break tables_loop;
                }
            }
        }
        if (!specifiedField) {
            throw new Exception("No se ha configurado ningn campo de las tablas seleccionadas");
        }
        // checks duplicated fields each table
        for (GeosearchTableVO table : tables) {
            if (tableHasDuplicatedFields(table)) {
                throw new Exception("Existen campos duplicados en la tabla '".concat(table.getTable().getName())
                        .concat("'. Revise su configuracin."));
            }
        }

        // ovverides the duplicated field values
        overrideDuplicatedFields();

        checkFieldErrors();

        // gets the zip file with configuration
        byte[] configurationData = generateConfigurationZipData();

        // configures the response
        HttpServletResponse response = (HttpServletResponse) externalCtx.getResponse();
        response.setContentType(CONTENT_TYPE);
        response.addHeader("Content-disposition", "attachment; filename=\"".concat(FILE_NAME).concat("\""));

        os = response.getOutputStream();
        os.write(configurationData);
        os.flush();
        os.close();
        facesContext.responseComplete();
    } catch (GeosearchException e) {
        errorMessage = "Error en la generacin de los archivos de configuracin: " + e.getLocalizedMessage();
    } catch (ParserConfigurationException e) {
        errorMessage = "Error en la generacin de los archivos de configuracin: " + e.getLocalizedMessage();
    } catch (XPathExpressionException e) {
        errorMessage = "Error en la generacin de los archivos de configuracin: " + e.getLocalizedMessage();
    } catch (TransformerException e) {
        errorMessage = "Error al comprimir los archivos de configuracin: " + e.getLocalizedMessage();
    } catch (IOException e) {
        errorMessage = "Error al comprimir los archivos de configuracin: " + e.getLocalizedMessage();
    } catch (Exception e) {
        errorMessage = "Error en la descarga de la configuracin: " + e.getLocalizedMessage();
    } finally {
        try {
            if (os != null) {
                os.flush();
                os.close();
            }
        } catch (IOException e) {
            errorMessage = "Error al comprimir los archivos de configuracin: " + e.getLocalizedMessage();
        }
    }

    if (errorMessage != null) {
        StatusMessages.instance().add(Severity.ERROR, errorMessage);
        log.error(errorMessage);
    } else {
        // saves the new service for each table
        try {
            ServiceType geosearchType = serviceService.getServiceType("geobusquedas");
            for (GeosearchTableVO geosearchTable : tables) {
                Table table = geosearchTable.getTable();
                Service geosearchService = new Service();
                geosearchService.setName(table.getName());
                geosearchService.setServiceUrl(PanelSettings.geosearchMaster.getUrl().concat("/").concat(core));
                geosearchService.setType(geosearchType);
                serviceService.create(geosearchService, table);
            }
        } catch (Exception e) {
            errorMessage = "";
            StatusMessages.instance().add(Severity.ERROR, errorMessage);
            log.error(errorMessage);
        }
    }
}