Example usage for javax.servlet.http HttpServletResponse getOutputStream

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

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Introduction

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

Prototype

public ServletOutputStream getOutputStream() throws IOException;

Source Link

Document

Returns a ServletOutputStream suitable for writing binary data in the response.

Usage

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

public static void setupFileDownload(HttpServletResponse response, String downloadPath) {
    try {/*from www .  j  av  a2 s . c om*/
        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 set up a file download.", ioex);
    }
}

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:org.openmrs.module.omodexport.util.OmodExportUtil.java

/**
 * Utility method for exporting a single module
 * /* w w  w. j a va 2  s  .c  om*/
 * @param module -The module to export
 * @param response
 */
public static void exportSingleModule(Module module, HttpServletResponse response) {
    File file = module.getFile();
    response.setContentLength(new Long(file.length()).intValue());
    response.setContentType("application/zip");
    response.setHeader("Content-Disposition", "attachment; filename=\"" + file.getName() + "\"");
    try {
        FileCopyUtils.copy(new FileInputStream(file), response.getOutputStream());
    } catch (IOException e) {
        e.printStackTrace();
    }

}

From source file:com.pactera.edg.am.metamanager.extractor.util.AntZip.java

public static void zipFile(String inputFileName, HttpServletResponse response) {
    try {// ww  w.ja v  a2  s.c  o m
        response.setContentType("text/plain;charset=utf-8");
        response.setHeader("Content-Disposition", "attachment;filename=data.zip");
        response.setStatus(HttpServletResponse.SC_OK); //??
        OutputStream output = response.getOutputStream();
        ZipOutputStream zipOut = new ZipOutputStream(output);
        zip(zipOut, new File(inputFileName), "");
        if (zipOut != null)
            zipOut.close();
        if (output != null)
            output.close();
    } catch (Exception e) {
        // TODO: handle exception
        e.printStackTrace();
    } finally {

    }

}

From source file:com.aurel.track.exchange.docx.exporter.LaTeXExportBL.java

/**
 * Serializes the docx content into the response's output stream
 * @param response/*from ww  w.ja va 2 s .c  o m*/
 * @param wordMLPackage
 * @return
 */
static String prepareReportResponse(HttpServletResponse response, TWorkItemBean workItem,
        ReportBeans reportBeans, TPersonBean user, Locale locale, String templateDir, String templateFile) {
    ReportBeansToLaTeXConverter rl = new ReportBeansToLaTeXConverter();
    File pdf = rl.generatePdf(workItem, reportBeans.getItems(), true, locale, user, "", "", false,
            new File(templateFile), new File(templateDir));

    OutputStream outputStream = null;
    try {
        outputStream = response.getOutputStream();
        InputStream is = new FileInputStream(pdf);
        IOUtils.copy(is, outputStream);
        is.close();
    } catch (FileNotFoundException e) {
        LOGGER.error(ExceptionUtils.getStackTrace(e));
    } catch (IOException e) {
        LOGGER.error("Getting the output stream failed with " + e.getMessage());
        LOGGER.error(ExceptionUtils.getStackTrace(e));
    } catch (Exception e) {
        LOGGER.error(ExceptionUtils.getStackTrace(e));
    }

    return null;
}

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

public static void doGet(StatusWebHandler webHandler, HttpServletRequest req, HttpServletResponse resp)
        throws IOException {

    String location = null;/* www.j av a2s .co  m*/
    String id = req.getParameter("resource");
    if (id == null) {
        id = req.getParameter("icon");
    }

    if (resources.containsKey(id)) {
        resp.setContentType(resources.get(id).getMimeType());
        location = resources.get(id).getLocation();
        InputStream is = Resources.class.getResourceAsStream(location);
        IOUtils.copy(is, resp.getOutputStream());
    } else {
        resp.sendError(404);
    }

}

From source file:com.googlecode.psiprobe.Utils.java

public static void sendFile(HttpServletRequest request, HttpServletResponse response, File file)
        throws IOException {
    OutputStream out = response.getOutputStream();
    RandomAccessFile raf = new RandomAccessFile(file, "r");
    try {//from   w  w w  .j  a v a 2 s  .  c  o  m
        long fileSize = raf.length();
        long rangeStart = 0;
        long rangeFinish = fileSize - 1;

        // accept attempts to resume download (if any)
        String range = request.getHeader("Range");
        if (range != null && range.startsWith("bytes=")) {
            String pureRange = range.replaceAll("bytes=", "");
            int rangeSep = pureRange.indexOf("-");

            try {
                rangeStart = Long.parseLong(pureRange.substring(0, rangeSep));
                if (rangeStart > fileSize || rangeStart < 0) {
                    rangeStart = 0;
                }
            } catch (NumberFormatException e) {
                // ignore the exception, keep rangeStart unchanged
            }

            if (rangeSep < pureRange.length() - 1) {
                try {
                    rangeFinish = Long.parseLong(pureRange.substring(rangeSep + 1));
                    if (rangeFinish < 0 || rangeFinish >= fileSize) {
                        rangeFinish = fileSize - 1;
                    }
                } catch (NumberFormatException e) {
                    // ignore the exception
                }
            }
        }

        // set some headers
        response.setContentType("application/x-download");
        response.setHeader("Content-Disposition", "attachment; filename=" + file.getName());
        response.setHeader("Accept-Ranges", "bytes");
        response.setHeader("Content-Length", Long.toString(rangeFinish - rangeStart + 1));
        response.setHeader("Content-Range", "bytes " + rangeStart + "-" + rangeFinish + "/" + fileSize);

        // seek to the requested offset
        raf.seek(rangeStart);

        // send the file
        byte[] buffer = new byte[4096];

        long len;
        int totalRead = 0;
        boolean nomore = false;
        while (true) {
            len = raf.read(buffer);
            if (len > 0 && totalRead + len > rangeFinish - rangeStart + 1) {
                // read more then required?
                // adjust the length
                len = rangeFinish - rangeStart + 1 - totalRead;
                nomore = true;
            }

            if (len > 0) {
                out.write(buffer, 0, (int) len);
                totalRead += len;
                if (nomore) {
                    break;
                }
            } else {
                break;
            }
        }
    } finally {
        raf.close();
    }
}

From source file:com.liferay.util.servlet.ServletResponseUtil.java

public static void sendFile(HttpServletResponse res, String fileName, byte[] byteArray, String contentType)
        throws IOException {

    _log.debug("Sending file of type " + contentType);

    res.setContentType(contentType);//from www  .j a v  a  2  s  . c om

    res.setHeader(HttpHeaders.CACHE_CONTROL, HttpHeaders.PUBLIC);
    res.setHeader(HttpHeaders.PRAGMA, HttpHeaders.PUBLIC);

    if (Validator.isNotNull(fileName)) {
        res.setHeader(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"" + fileName + "\"");
    }

    res.getOutputStream().write(byteArray);
    res.getOutputStream().flush();
}

From source file:com.google.gsa.valve.modules.utils.HTTPAuthZProcessor.java

/**
 * If the document is non HTML, this method processes its content in order to 
 * rewrite the URLs it includes/*from w w w.j a va2  s.c  o  m*/
 * 
 * @param response
 * @param method
 * @throws IOException
 */
public static void processNonHTML(HttpServletResponse response, HttpMethodBase method) throws IOException {

    logger.debug("Processing a non HTML document");

    InputStream is = new BufferedInputStream(method.getResponseBodyAsStream());

    //HTTP Output
    OutputStream os = response.getOutputStream();

    byte[] buffer = new byte[BUFFER_BLOCK_SIZE];
    int read = is.read(buffer);
    while (read >= 0) {
        if (read > 0) {
            os.write(buffer, 0, read);
        }
        read = is.read(buffer);
    }

    //protection
    buffer = null;

    is.close();
    os.close();
}

From source file:jease.site.Streams.java

/**
 * Write given file to response./*from  w  w  w .java2 s  .  c  o m*/
 * 
 * If the given content type denotes a browser supported image, the image
 * will be automatically scaled if either "scale" is present as request
 * paramter or JEASE_IMAGE_LIMIT is set in Registry.
 */
public static void write(HttpServletRequest request, HttpServletResponse response, File file,
        String contentType) throws IOException {
    if (Images.isBrowserCompatible(contentType)) {
        int scale = NumberUtils.toInt(request.getParameter("scale"));
        if (scale > 0) {
            java.io.File scaledImage = Images.scale(file, scale);
            scaledImage.deleteOnExit();
            response.setContentType(contentType);
            response.setContentLength((int) scaledImage.length());
            Files.copy(scaledImage.toPath(), response.getOutputStream());
            return;
        }
        int limit = NumberUtils.toInt(Registry.getParameter(Names.JEASE_IMAGE_LIMIT));
        if (limit > 0) {
            java.io.File scaledImage = Images.limit(file, limit);
            scaledImage.deleteOnExit();
            response.setContentType(contentType);
            response.setContentLength((int) scaledImage.length());
            Files.copy(scaledImage.toPath(), response.getOutputStream());
            return;
        }

    }
    response.setContentType(contentType);
    response.setContentLength((int) file.length());
    Files.copy(file.toPath(), response.getOutputStream());
}