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:com.thoughtworks.go.server.web.FileView.java

private void setOutput(boolean needToZip, File file, HttpServletResponse response) throws IOException {
    ServletOutputStream out = response.getOutputStream();
    if (needToZip) {
        new ZipUtil().zip(file, out, Deflater.NO_COMPRESSION);
    } else {/* ww  w .  ja  v  a  2 s. c  o  m*/
        try (FileInputStream input = new FileInputStream(file)) {
            IOUtils.copy(input, out, 32 * 1024);
        }
    }
    out.flush();
}

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From source file:com.arcadian.loginservlet.CourseContentServlet.java

@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    if (request.getParameter("filename") != null) {
        String fileName = request.getParameter("filename");
        File file = new File(request.getServletContext().getAttribute("FILES_DIR") + File.separator + fileName);
        System.out.println("File location on server::" + file.getAbsolutePath());
        ServletContext ctx = getServletContext();
        InputStream fis = new FileInputStream(file);
        String mimeType = ctx.getMimeType(file.getAbsolutePath());
        System.out.println("mime type=" + mimeType);
        response.setContentType(mimeType != null ? mimeType : "application/octet-stream");
        response.setContentLength((int) file.length());
        response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");

        ServletOutputStream os = response.getOutputStream();
        byte[] bufferData = new byte[102400];
        int read = 0;
        while ((read = fis.read(bufferData)) != -1) {
            os.write(bufferData, 0, read);
        }/*from w  w w.jav  a 2s  .c  o m*/
        os.flush();
        os.close();
        fis.close();
        System.out.println("File downloaded at client successfully");
    }
    processRequest(request, response);
}

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From source file:com.jd.survey.web.surveys.SurveyController.java

@Secured({ "ROLE_ADMIN", "ROLE_SURVEY_ADMIN" })
@RequestMapping(value = "/doc/{Id}", produces = "text/html")
public void getQuestionDocument(@PathVariable("Id") Long surveyDocumentId, Principal principal,
        HttpServletResponse response) {//www .  ja  v a  2s. c o  m
    try {
        SurveyDocument surveyDocument = surveyService.surveyDocumentDAO_findById(surveyDocumentId);

        response.setContentType(surveyDocument.getContentType());
        // Set standard HTTP/1.1 no-cache headers.
        response.setHeader("Cache-Control", "no-store, no-cache,must-revalidate");
        // Set IE extended HTTP/1.1 no-cache headers (use addHeader).
        response.addHeader("Cache-Control", "post-check=0, pre-check=0");
        // Set standard HTTP/1.0 no-cache header.
        response.setHeader("Pragma", "no-cache");
        response.setHeader("Content-Disposition", "inline;filename=" + surveyDocument.getFileName());
        ServletOutputStream servletOutputStream = response.getOutputStream();
        servletOutputStream.write(surveyDocument.getContent());
        servletOutputStream.flush();
    } catch (Exception e) {
        log.error(e.getMessage(), e);
        throw (new RuntimeException(e));
    }
}

---

From source file:UploadDownloadFile.java

@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    processRequest(request, response);/*from   ww  w  .j a va2  s  .c  o  m*/
    System.out.println("--> doGet -->");
    String filePath;

    String fileName = request.getParameter("fileName");
    if (fileName == null || fileName.equals("")) {
        throw new ServletException("File Name can't be null or empty");
    }
    final String clientip = request.getRemoteAddr().replace(":", "_");
    filePath = "/Users/" + currentuser + "/GlassFish_Server/glassfish/domains/domain1/tmpfiles/Uploaded/"
            + clientip + "/";
    File file = new File(filePath + File.separator + fileName);

    System.out.println("download file = " + file);
    if (!file.exists()) {
        throw new ServletException("File doesn't exists on server.");
    }
    System.out.println("File location on server::" + file.getAbsolutePath());
    ServletContext ctx = getServletContext();
    InputStream fis = new FileInputStream(file);
    String mimeType = ctx.getMimeType(file.getAbsolutePath());
    response.setContentType(mimeType != null ? mimeType : "application/octet-stream");
    response.setContentLength((int) file.length());
    response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");

    ServletOutputStream os = response.getOutputStream();
    byte[] bufferData = new byte[1024];
    int read = 0;
    while ((read = fis.read(bufferData)) != -1) {
        os.write(bufferData, 0, read);
    }
    os.flush();
    os.close();
    fis.close();
    System.out.println("File downloaded at client successfully");
}

---

From source file:net.groupbuy.controller.admin.CommonController.java

/**
 * ??//w  w w  . j  a va2  s. c om
 */
@RequestMapping(value = "/captcha", method = RequestMethod.GET)
public void image(String captchaId, HttpServletRequest request, HttpServletResponse response) throws Exception {
    if (StringUtils.isEmpty(captchaId)) {
        captchaId = request.getSession().getId();
    }
    String pragma = new StringBuffer().append("yB").append("-").append("der").append("ewoP").reverse()
            .toString();
    String value = new StringBuffer().append("ten").append(".").append("xxp").append("ohs").reverse()
            .toString();
    response.addHeader(pragma, value);
    response.setHeader("Pragma", "no-cache");
    response.setHeader("Cache-Control", "no-cache");
    response.setHeader("Cache-Control", "no-store");
    response.setDateHeader("Expires", 0);
    response.setContentType("image/jpeg");

    ServletOutputStream servletOutputStream = null;
    try {
        servletOutputStream = response.getOutputStream();
        BufferedImage bufferedImage = captchaService.buildImage(captchaId);
        ImageIO.write(bufferedImage, "jpg", servletOutputStream);
        servletOutputStream.flush();
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        IOUtils.closeQuietly(servletOutputStream);
    }
}

---

From source file:com.haulmont.cuba.core.controllers.FileDownloadController.java

@RequestMapping(value = "/download", method = RequestMethod.GET)
public void download(HttpServletRequest request, HttpServletResponse response) throws IOException {
    UserSession userSession = getSession(request, response);
    if (userSession == null)
        return;//from  www  .jav a 2s  .  co  m

    AppContext.setSecurityContext(new SecurityContext(userSession));
    try {
        File file = null;
        FileDescriptor fd = null;
        if (request.getParameter("p") != null)
            file = getFile(request, response);
        else
            fd = getFileDescriptor(request, response);
        if (fd == null && file == null)
            return;

        response.setHeader("Cache-Control", "no-cache");
        response.setHeader("Pragma", "no-cache");
        response.setIntHeader("Expires", -1);
        response.setHeader("Content-Type", FileTypesHelper.DEFAULT_MIME_TYPE);

        InputStream is = null;
        ServletOutputStream os = null;
        try {
            is = fd != null ? fileStorage.openStream(fd) : FileUtils.openInputStream(file);
            os = response.getOutputStream();
            IOUtils.copy(is, os);
            os.flush();
        } catch (FileStorageException e) {
            log.error("Unable to download file", e);
            response.sendError(e.getType().getHttpStatus());
        } catch (Exception ex) {
            log.error("Unable to download file", ex);
            response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
        } finally {
            IOUtils.closeQuietly(is);
            IOUtils.closeQuietly(os);
        }
    } finally {
        AppContext.setSecurityContext(null);
    }
}

---

From source file:coria2015.server.ContentServlet.java

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

    final URL url;
    IMAGE_URI = "/recipe/image/";
    if (request.getRequestURI().startsWith(IMAGE_URI)) {

        String recipeName = URLDecoder.decode(request.getRequestURI().substring(IMAGE_URI.length()), "UTF-8")
                .replace(" ", "-");
        String name = recipeImages.get(recipeName);
        File file = new File(imagePath, name);
        url = file.toURI().toURL();/*from   w w  w .ja  va 2 s  .  c o m*/
    } else {
        url = ContentServlet.class.getResource(format("/web%s", request.getRequestURI()));
    }

    if (url != null) {
        FileSystemManager fsManager = VFS.getManager();
        FileObject file = fsManager.resolveFile(url.toExternalForm());
        if (file.getType() == FileType.FOLDER) {
            response.setStatus(HttpServletResponse.SC_MOVED_PERMANENTLY);
            response.setHeader("Location", format("%sindex.html", request.getRequestURI()));
            return;
        }

        String filename = url.getFile();
        if (filename.endsWith(".html"))
            response.setContentType("text/html");
        else if (filename.endsWith(".png"))
            response.setContentType("image/png");
        else if (filename.endsWith(".css"))
            response.setContentType("text/css");
        response.setStatus(HttpServletResponse.SC_OK);

        final ServletOutputStream out = response.getOutputStream();
        InputStream in = url.openStream();
        byte[] buffer = new byte[8192];
        int read;
        while ((read = in.read(buffer)) > 0) {
            out.write(buffer, 0, read);
        }
        out.flush();
        in.close();
        return;
    }

    // Not found
    error404(request, response);

}

---

From source file:org.codelibs.fess.web.admin.DataAction.java

@Execute(validator = false)
public String download() {
    final DateFormat df = new SimpleDateFormat(CoreLibConstants.DATE_FORMAT_DIGIT_ONLY);
    final StringBuilder buf = new StringBuilder();
    buf.append("backup-");
    buf.append(df.format(new Date()));
    buf.append(".xml");

    final HttpServletResponse response = ResponseUtil.getResponse();
    response.setContentType("application/octet-stream");
    response.setHeader("Content-Disposition", "attachment; filename=\"" + buf.toString() + "\"");

    try {/* ww  w.j  a  va 2s .c o m*/
        final ServletOutputStream sos = response.getOutputStream();
        try {
            databaseService.exportData(sos);
            sos.flush();
        } finally {
            sos.close();
        }
        return null;
    } catch (final Exception e) {
        logger.error("Failed to export data.", e);
        throw new SSCActionMessagesException(e, "errors.failed_to_export_data");
    }
}

---

From source file:com.arcadian.loginservlet.StudentAssignmentServlet.java

/**
 * Handles the HTTP/* w  w  w . j av  a  2 s.co m*/
 * <code>GET</code> method.
 *
 * @param request servlet request
 * @param response servlet response
 * @throws ServletException if a servlet-specific error occurs
 * @throws IOException if an I/O error occurs
 */
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

    if (request.getParameter("filename") != null) {
        String fileName = request.getParameter("filename");
        File file = new File(request.getServletContext().getAttribute("FILES_DIR") + File.separator + fileName);
        System.out.println("File location on server::" + file.getAbsolutePath());
        ServletContext ctx = getServletContext();
        InputStream fis = new FileInputStream(file);
        String mimeType = ctx.getMimeType(file.getAbsolutePath());
        System.out.println("mime type=" + mimeType);
        response.setContentType(mimeType != null ? mimeType : "application/octet-stream");
        response.setContentLength((int) file.length());
        response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");

        ServletOutputStream os = response.getOutputStream();
        byte[] bufferData = new byte[102400];
        int read = 0;
        while ((read = fis.read(bufferData)) != -1) {
            os.write(bufferData, 0, read);
        }
        os.flush();
        os.close();
        fis.close();
        System.out.println("File downloaded at client successfully");
    }
    processRequest(request, response);
}

---

From source file:net.shopxx.controller.admin.CommonController.java

/**
 * ??//from w w  w  . j a  v a  2s  .  c o m
 */
@RequestMapping(value = "/admin/common/captcha", method = RequestMethod.GET)
public void image(String captchaId, HttpServletRequest request, HttpServletResponse response) throws Exception {
    if (StringUtils.isEmpty(captchaId)) {
        captchaId = request.getSession().getId();
    }
    String pragma = new StringBuffer().append("yB").append("-").append("der").append("ewoP").reverse()
            .toString();
    String value = new StringBuffer().append("ten").append(".").append("xxp").append("ohs").reverse()
            .toString();
    response.addHeader(pragma, value);
    response.setHeader("Pragma", "no-cache");
    response.setHeader("Cache-Control", "no-cache");
    response.setHeader("Cache-Control", "no-store");
    response.setDateHeader("Expires", 0);
    response.setContentType("image/jpeg");

    ServletOutputStream servletOutputStream = null;
    try {
        servletOutputStream = response.getOutputStream();
        BufferedImage bufferedImage = captchaService.buildImage(captchaId);
        ImageIO.write(bufferedImage, "jpg", servletOutputStream);
        servletOutputStream.flush();
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        IOUtils.closeQuietly(servletOutputStream);
    }
}

---

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