Example usage for javax.servlet.http HttpServletResponse setContentLength

List of usage examples for javax.servlet.http HttpServletResponse setContentLength

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Introduction

In this page you can find the example usage for javax.servlet.http HttpServletResponse setContentLength.

Prototype

public void setContentLength(int len);

Source Link

Document

Sets the length of the content body in the response In HTTP servlets, this method sets the HTTP Content-Length header.

Usage

From source file:org.shareok.data.webserv.WebUtil.java

public static void downloadFileFromServer(HttpServletResponse response, String downloadPath) {

    try {/*from  w  w w  .j  a  v a  2  s . co m*/
        File file = new File(downloadPath);
        if (!file.exists()) {
            String errorMessage = "Sorry. The file you are looking for does not exist";
            System.out.println(errorMessage);
            OutputStream outputStream = response.getOutputStream();
            outputStream.write(errorMessage.getBytes(Charset.forName("UTF-8")));
            outputStream.close();
            return;
        }

        String mimeType = URLConnection.guessContentTypeFromName(file.getName());
        if (mimeType == null) {
            System.out.println("mimetype is not detectable, will take default");
            mimeType = "application/octet-stream";
        }

        response.setContentType(mimeType);
        /* "Content-Disposition : inline" will show viewable types [like images/text/pdf/anything viewable by browser] right on browser 
        while others(zip e.g) will be directly downloaded [may provide save as popup, based on your browser setting.]*/
        response.setHeader("Content-Disposition",
                String.format("attachment; filename=\"" + file.getName() + "\""));

        /* "Content-Disposition : attachment" will be directly download, may provide save as popup, based on your browser setting*/
        //response.setHeader("Content-Disposition", String.format("attachment; filename=\"%s\"", file.getName()));

        response.setContentLength((int) file.length());

        InputStream inputStream = new BufferedInputStream(new FileInputStream(file));

        //Copy bytes from source to destination(outputstream in this example), closes both streams.
        FileCopyUtils.copy(inputStream, response.getOutputStream());
    } catch (IOException ioex) {
        logger.error("Cannot download file responding to downloading resquest!", ioex);
    }
}

From source file:info.magnolia.rendering.engine.RenderingFilter.java

private InputStream getNodedataAsStream(String path, Session session, HttpServletResponse res) {

    log.debug("getNodedataAstream for path \"{}\"", path);

    try {/*from   ww  w .  java2s.  c  o  m*/
        Node atom = session.getNode(path);
        if (atom != null) {
            if (atom.hasProperty(JcrConstants.JCR_DATA)) {
                Property sizeProperty = atom.getProperty("size");
                String sizeString = sizeProperty == null ? "" : sizeProperty.getString();
                if (NumberUtils.isNumber(sizeString)) {
                    res.setContentLength(Integer.parseInt(sizeString));
                }
                Property streamProperty = atom.getProperty(JcrConstants.JCR_DATA);
                return streamProperty.getStream();
            }
        }

        log.warn("Resource not found: [{}]", path);
    } catch (RepositoryException e) {
        log.error("RepositoryException while reading Resource [" + path + "]", e);
    }
    return null;
}

From source file:com.benfante.minimark.controllers.ResultsController.java

@RequestMapping
public void pdfs(@RequestParam("id") Long id, HttpServletRequest req, HttpServletResponse res, Locale locale) {
    Assessment assessment = assessmentDao.get(id);
    userProfileBo.checkEditAuthorization(assessment);
    List<AssessmentFilling> assessments = assessmentFillingDao
            .findByAssessmentIdOrderByLastNameAndFirstNameAndIdentifier(id);
    OutputStream out = null;/*from   www .j  a  v a  2  s . c o m*/
    try {
        byte[] pdfBytes = assessmentPdfBuilder.buildPdf(assessments, Utilities.getBaseUrl(req), locale);
        out = res.getOutputStream();
        res.setContentType("application/pdf");
        res.setContentLength(pdfBytes.length);
        res.setHeader("Content-Disposition", " attachment; filename=\"" + assessment.getTitle() + ".pdf\"");
        res.setHeader("Expires", "0");
        res.setHeader("Cache-Control", "must-revalidate, post-check=0, pre-check=0");
        res.setHeader("Pragma", "public");
        out.write(pdfBytes);
        out.flush();
    } catch (Exception ex) {
        logger.error("Can't build PDF file for " + assessment.getTitle(), ex);
    } finally {
        if (out != null) {
            try {
                out.close();
            } catch (IOException ioe) {
            }
        }
    }
}

From source file:edu.csudh.goTorosBank.WithdrawServlet.java

@Override
public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    //File blueCheck = new File("blank-blue-check.jpg");
    File blueCheck = new File(request.getParameter("filename"));
    String pathToWeb = getServletContext().getRealPath("/" + blueCheck);

    ServletContext cntx = request.getServletContext();
    String mime = cntx.getMimeType(pathToWeb);

    response.setContentType(mime);/*w w w  .j av  a2  s.  com*/
    try {
        File file = new File(pathToWeb);
        response.setContentLength((int) file.length());

        FileInputStream in = new FileInputStream(file);
        OutputStream out = response.getOutputStream();

        // Copy the contents of the file to the output stream
        byte[] buf = new byte[1024];
        int count;
        while ((count = in.read(buf)) >= 0) {
            out.write(buf, 0, count);
        }
        out.close();
        in.close();

        response.setHeader("Content-Transfer-Encoding", "binary");
        response.setHeader("Content-Disposition", "attachment; filename=\"" + blueCheck.getName() + "\"");//fileName;
    } catch (Exception e) {
        response.getWriter().write(e.getMessage());
    }

}

From source file:com.nemesis.admin.UploadServlet.java

/**
 * @param request//from w  w  w  . j  av a 2s  .  c  om
 * @param response
 * @throws javax.servlet.ServletException
 * @throws java.io.IOException
 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
 * response)
 *
 */
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

    if (request.getParameter("getfile") != null && !request.getParameter("getfile").isEmpty()) {
        File file = getFile(request, request.getParameter("getfile"));
        if (file.exists()) {
            int bytes = 0;
            try (ServletOutputStream op = response.getOutputStream()) {
                response.setContentType(getMimeType(file));
                response.setContentLength((int) file.length());
                response.setHeader("Content-Disposition", "inline; filename=\"" + file.getName() + "\"");

                byte[] bbuf = new byte[1024];
                DataInputStream in = new DataInputStream(new FileInputStream(file));

                while ((in != null) && ((bytes = in.read(bbuf)) != -1)) {
                    op.write(bbuf, 0, bytes);
                }

                in.close();
                op.flush();
            }
        }
    } else if (request.getParameter("delfile") != null && !request.getParameter("delfile").isEmpty()) {
        File file = getFile(request, request.getParameter("delfile"));
        if (file.exists()) {
            file.delete(); // TODO:check and report success
        }
    } else if (request.getParameter("getthumb") != null && !request.getParameter("getthumb").isEmpty()) {
        File file = getFile(request, request.getParameter("getthumb"));
        if (file.exists()) {
            System.out.println(file.getAbsolutePath());
            String mimetype = getMimeType(file);
            if (mimetype.endsWith("png") || mimetype.endsWith("jpeg") || mimetype.endsWith("jpg")
                    || mimetype.endsWith("gif")) {
                BufferedImage im = ImageIO.read(file);
                if (im != null) {
                    int newWidth = 75;
                    if (request.getParameter("w") != null) {
                        try {
                            newWidth = Integer.parseInt(request.getParameter("w"));
                        } catch (Exception e) {
                            //Se mantiene el valor por defecto de 75
                        }
                    }

                    BufferedImage thumb = Scalr.resize(im, newWidth);
                    if (request.getParameter("h") != null) {
                        try {
                            thumb = Scalr.crop(thumb, newWidth, Integer.parseInt(request.getParameter("h")));
                        } catch (IllegalArgumentException | ImagingOpException e) {
                            //Se mantienen las proporciones.
                        }
                    }

                    ByteArrayOutputStream os = new ByteArrayOutputStream();
                    if (mimetype.endsWith("png")) {
                        ImageIO.write(thumb, "PNG", os);
                        response.setContentType("image/png");
                    } else if (mimetype.endsWith("jpeg")) {
                        ImageIO.write(thumb, "jpg", os);
                        response.setContentType("image/jpeg");
                    } else if (mimetype.endsWith("jpg")) {
                        ImageIO.write(thumb, "jpg", os);
                        response.setContentType("image/jpeg");
                    } else {
                        ImageIO.write(thumb, "GIF", os);
                        response.setContentType("image/gif");
                    }
                    try (ServletOutputStream srvos = response.getOutputStream()) {
                        response.setContentLength(os.size());
                        response.setHeader("Content-Disposition",
                                "inline; filename=\"" + file.getName() + "\"");
                        os.writeTo(srvos);
                        srvos.flush();
                    }
                }
            }
        } // TODO: check and report success
    } else {
        PrintWriter writer = response.getWriter();
        writer.write("call POST with multipart form data");
    }
}

From source file:fr.paris.lutece.plugins.stock.modules.billetterie.web.PosterImageServlet.java

/**
 * Returns poster image/*from   w  ww .  j a v a 2 s .c  om*/
 *
 * @param request the request
 * @param response the response
 * @throws ServletException the servlet exception
 * @throws IOException Signals that an I/O exception has occurred.
 */
protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    String sIdProduct = request.getParameter(PARAMETER_PRODUCT_ID);

    if (StringUtils.isNotEmpty(sIdProduct)) {
        Integer idProduct = Integer.parseInt(sIdProduct);
        boolean isThumbnail = (request.getParameter(PARAMETER_TB) != null)
                && request.getParameter(PARAMETER_TB).equals(String.valueOf(true));
        byte[] bImage;

        if (isThumbnail) {
            bImage = _productService.getTbImage(idProduct);
        } else {
            bImage = _productService.getImage(idProduct);
        }

        response.setContentLength(bImage.length);
        response.setContentType(CONTENT_TYPE_IMAGE_JPEG);

        ServletOutputStream os = response.getOutputStream();
        IOUtils.write(bImage, os);
        os.flush();
        os.close();
    } else {
        LOGGER.error(ERROR_MESSAGE);
    }
}

From source file:com.sshdemo.common.report.manage.web.TextReportAction.java

public void download() {
    PrintWriter pw = null;/*from  w w  w.j av  a  2 s. co  m*/
    InputStream in = null;
    try {
        if (getTextId() != null) {
            TextReport report = reportFac.findTextReportById(getTextId());
            if (report.getTextEntity() != null && report.getTextEntity().length != 0) {
                String fileName = String.valueOf(report.getName());
                fileName = URLEncoder.encode(fileName, "UTF-8");
                //fileName = new String(fileName.getBytes("GBK"), "ISO8859-1");

                HttpServletResponse response = ServletActionContext.getResponse();
                response.setContentType("application/jrxml");
                response.setCharacterEncoding("UTF-8");
                response.setHeader("Content-disposition", "attachment; filename=" + fileName + ".jrxml");

                byte[] bytes = new byte[report.getTextEntity().length];
                bytes = report.getTextEntity();

                pw = response.getWriter();

                response.setContentLength(bytes.length);
                in = new ByteArrayInputStream(bytes);
                int len = 0;
                while ((len = in.read()) > -1) {
                    pw.write(len);
                }
                pw.flush();
            } else {
                this.addActionError("?");
            }
        } else {
            this.addActionError("?");
        }
    } catch (IOException e) {
    } finally {
        if (pw != null) {
            try {
                pw.close();
                pw = null;
            } catch (Exception e) {
            }
        }
        if (in != null) {
            try {
                in.close();
                in = null;
            } catch (Exception e) {
            }
        }
    }
}

From source file:de.kp.ames.web.core.service.ServiceImpl.java

public void sendResponse(byte[] bytes, String mimetype, HttpServletResponse response) throws IOException {

    response.setStatus(HttpServletResponse.SC_OK);
    response.setCharacterEncoding("UTF-8");

    response.setContentType(mimetype);/*  w  w  w.  j a v a2  s  .c  o  m*/

    response.setContentLength(bytes.length);

    OutputStream os = response.getOutputStream();

    os.write(bytes);
    os.close();

}

From source file:de.mpg.escidoc.pubman.viewItem.bean.FileBean.java

/**
 * Sends back an html response of content type text/plain that includes the checksum as UTF-8 string.
 * @return//  w  ww  . jav  a 2  s .  co  m
 */
public String displayChecksum() {

    if (file.getChecksum() != null && file.getChecksumAlgorithm() != null) {
        FacesContext facesContext = FacesContext.getCurrentInstance();
        HttpServletResponse response = (HttpServletResponse) facesContext.getExternalContext().getResponse();
        response.setContentLength(file.getChecksum().length());
        response.setContentType("text/plain");
        try {
            String filename = this.file.getName();
            if (filename != null) {
                filename = filename.replace(" ", "_");
            } else {
                filename = "";
            }

            response.setHeader("Content-disposition",
                    "attachment; filename=" + URLEncoder.encode(filename, "UTF-8") + "."
                            + getChecksumAlgorithmAsString().toLowerCase());

            OutputStream out = response.getOutputStream();
            out.write(file.getChecksum().getBytes("UTF-8"));
            out.flush();

            facesContext.responseComplete();
            out.close();
        } catch (Exception e) {
            error("Could not display checksum of file!");
            logger.error("Could not display checksum of file", e);
        }

        return "";
    } else {
        error("Could not display checksum of file!");
        logger.error("File checksum is null");
        return "";
    }

}

From source file:it.greenvulcano.gvesb.adapter.http.mapping.RESTHttpServletMapping.java

/**
 * Sets header fields for file download.
 * //  www.  j a v  a2 s.  c o  m
 * @param resp
 *        An HttpServletResponse object
 * @param contentType
 *        A string containing the declared response's content type
 * @param fileName
 *        A string containing the downloaded file name
 * @param fileSize
 *        A string containing the downloaded file size
 */
private void setRespDownloadHeaders(HttpServletResponse resp, String contentType, String fileName,
        int fileSize) {
    resp.setContentType(contentType);
    resp.setContentLength(fileSize);
    resp.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");
    resp.setHeader("Connection", "close");
    resp.setHeader("Expires", "-1");
    resp.setHeader("Pragma", "no-cache");
    resp.setHeader("Cache-Control", "no-cache");
}