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:br.gov.lexml.server.LexMLOAIHandler.java

/**
 * Get a response Writer depending on acceptable encodings
 * // ww  w .  jav a2  s.  c om
 * @param request the servlet's request information
 * @param response the servlet's response information
 * @exception IOException an I/O error occurred
 */
public static Writer getWriter(final HttpServletRequest request, final HttpServletResponse response)
        throws IOException {
    Writer out;
    String encodings = request.getHeader("Accept-Encoding");
    if (debug) {
        log.debug("encodings=" + encodings);
    }
    if (encodings != null && encodings.indexOf("gzip") != -1) {
        response.setHeader("Content-Encoding", "gzip");
        out = new OutputStreamWriter(new GZIPOutputStream(response.getOutputStream()), "UTF-8");
    } else if (encodings != null && encodings.indexOf("deflate") != -1) {
        response.setHeader("Content-Encoding", "deflate");
        out = new OutputStreamWriter(new DeflaterOutputStream(response.getOutputStream()), "UTF-8");
    } else {
        out = response.getWriter();
    }
    return out;
}

From source file:com.jaspersoft.jasperserver.rest.RESTUtils.java

public static void sendFile(DataSource ds, HttpServletResponse response) {
    response.setContentType(ds.getContentType());

    if (ds.getName() != null && ds.getName().length() > 0) {
        response.addHeader("Content-Disposition", "attachment; filename=" + ds.getName());
    }// ww w . j av  a  2 s.  c om

    OutputStream outputStream = null;
    BufferedInputStream bufferedInputStream = null;
    try {
        outputStream = response.getOutputStream();

        bufferedInputStream = new BufferedInputStream(ds.getInputStream());
        int readBytes = 0;

        while ((readBytes = bufferedInputStream.read()) != -1) {
            outputStream.write(readBytes);
        }

        if (log.isDebugEnabled()) {
            log.debug("finished sending bytes");
        }

    } catch (IOException ex) {
        log.error("Error serving a file: " + ex.getMessage(), ex);
    } finally {
        if (outputStream != null)
            try {
                outputStream.close();
            } catch (Exception ex) {
            }
        if (bufferedInputStream != null)
            try {
                bufferedInputStream.close();
            } catch (Exception ex) {
            }
    }
}

From source file:de.micromata.genome.gwiki.plugin.vfolder_1_0.GWikiVFolderUtils.java

public static void writeContent(GWikiElement vfolderEl, String filePageId, HttpServletResponse resp)
        throws IOException {

    // resp.setContentType(getContentType());
    String localName = getLocalFromFilePageId(vfolderEl, filePageId);
    GWikiVFolderNode fvn = GWikiVFolderNode.getVFolderFromElement(vfolderEl);

    FsObject file = fvn.getFileSystem().getFileObject(localName);
    if (file.exists() == false) {
        return;//from   ww  w  . j  a v a2  s  .co m
    }
    resp.setContentLength(file.getLength());
    OutputStream os = resp.getOutputStream();
    fvn.getFileSystem().readBinaryFile(localName, os);
}

From source file:com.jaspersoft.jasperserver.war.OlapGetChart.java

/**
 * Binary streams the specified file to the HTTP response in 1KB chunks
 *
 * @param file The file to be streamed./*ww w . ja  v a2 s  .co m*/
 * @param response The HTTP response object.
 * @param mimeType The mime type of the file, null allowed.
 *
 * @throws IOException  if there is an I/O problem.
 * @throws FileNotFoundException  if the file is not found.
 */
public static void sendTempFile(File file, HttpServletResponse response, String mimeType)
        throws IOException, FileNotFoundException {

    if (file.exists()) {
        BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));

        //  Set HTTP headers
        if (mimeType != null) {
            response.setHeader("Content-Type", mimeType);
        }
        response.setHeader("Content-Length", String.valueOf(file.length()));
        SimpleDateFormat sdf = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss z");
        response.setHeader("Last-Modified", sdf.format(new Date(file.lastModified())));

        BufferedOutputStream bos = new BufferedOutputStream(response.getOutputStream());
        byte[] input = new byte[1024];
        boolean eof = false;
        while (!eof) {
            int length = bis.read(input);
            if (length == -1) {
                eof = true;
            } else {
                bos.write(input, 0, length);
            }
        }
        bos.flush();
        bis.close();
        bos.close();
    } else {
        throw new FileNotFoundException(file.getAbsolutePath());
    }
    return;
}

From source file:com.cisco.ca.cstg.pdi.utils.Util.java

/**
 * This method is used to download files from specified path
 * @param response/*from w  ww .  j  a  va 2s .  c  o  m*/
 * @param archiveFile
 */
public static void downloadArchiveFile(HttpServletResponse response, File archiveFile) {
    if (archiveFile.isFile()) {
        response.reset();
        response.setContentType("application/zip");
        response.setHeader("Content-Disposition", "attachment;filename=\"" + archiveFile.getName() + "\"");
        FileInputStream is = null;
        ServletOutputStream op = null;
        try {
            op = response.getOutputStream();
            double dLength = archiveFile.length();
            int iLength = 0;
            int num_read = 0;

            if (dLength >= Integer.MIN_VALUE && dLength <= Integer.MAX_VALUE) {
                iLength = (int) dLength;
            }
            byte[] arBytes = new byte[iLength];
            is = new FileInputStream(archiveFile);

            while (num_read < iLength) {
                int count = is.read(arBytes, num_read, iLength - num_read);
                if (count < 0) {
                    throw new IOException("end of stream reached");
                }
                num_read += count;
            }
            op.write(arBytes);
            op.flush();
        } catch (IOException e) {
            LOGGER.error(e.getMessage(), e);
        } finally {
            if (null != is) {
                try {
                    is.close();
                } catch (IOException e) {
                    LOGGER.error(e.getMessage(), e);
                }
            }
            if (null != op) {
                try {
                    op.close();
                } catch (IOException e) {
                    LOGGER.error(e.getMessage(), e);
                }
            }
        }
    }
}

From source file:com.easyjf.web.core.FrameworkEngine.java

/**
 * Writer/*from   w w w  . ja v a  2 s  .co m*/
 * 
 * @param response
 * @return 
 * @throws UnsupportedEncodingException
 * @throws IOException
 */
public static Writer getResponseWriter(HttpServletResponse response)
        throws UnsupportedEncodingException, IOException {
    Writer writer = null;
    try {
        writer = response.getWriter();
    } catch (IllegalStateException e) {
        String encoding = response.getCharacterEncoding();
        if (encoding == null) {
            encoding = DEFAULT_OUTPUT_ENCODING;
        }
        writer = new OutputStreamWriter(response.getOutputStream(), encoding);
    }
    return writer;
}

From source file:com.lushapp.common.web.utils.DownloadUtils.java

public static void download(HttpServletRequest request, HttpServletResponse response, String displayName,
        byte[] bytes) throws IOException {

    if (ArrayUtils.isEmpty(bytes)) {
        response.setContentType("text/html;charset=utf-8");
        response.setCharacterEncoding("utf-8");
        response.getWriter().write("??");
        return;//w  w w  .  java2  s.com
    }

    response.reset();
    WebUtils.setNoCacheHeader(response);

    response.setContentType("application/x-download");
    response.setContentLength((int) bytes.length);

    String displayFilename = displayName.substring(displayName.lastIndexOf("_") + 1);
    displayFilename = displayFilename.replace(" ", "_");
    WebUtils.setDownloadableHeader(request, response, displayFilename);
    BufferedInputStream is = null;
    OutputStream os = null;
    try {

        os = response.getOutputStream();
        is = new BufferedInputStream(new ByteArrayInputStream(bytes));
        IOUtils.copy(is, os);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        IOUtils.closeQuietly(is);
    }
}

From source file:fiftyone.mobile.detection.webapp.JavascriptProvider.java

static void sendJavaScript(HttpServletRequest request, HttpServletResponse response, Dataset dataSet,
        StringBuilder javascript) throws IOException {

    response.reset();//ww w  .j  a v a  2 s.co  m
    response.setContentType("application/x-javascript");
    response.setCharacterEncoding("UTF-8");
    response.setHeader("Vary", "User-Agent");
    response.setHeader("Cache-Control", "public");
    response.setHeader("Expires", dataSet.nextUpdate.toString());
    response.setHeader("Last-Modified", dataSet.published.toString());
    try {
        response.setHeader("ETag", eTagHash(dataSet, request));
    } catch (Exception ex) {
        // The response doesn't support eTags. Nothing we can do.
    }
    response.setBufferSize(DEFAULT_BUFFER_SIZE);
    response.setHeader("Content-Length", Integer.toString(javascript.length()));

    response.getOutputStream().println(javascript.toString());
    response.getOutputStream().flush();
    response.getOutputStream().close();
}

From source file:br.eb.ime.pfc.domain.GeoServerCommunication.java

private static void redirectStream(String urlName, HttpServletRequest request, HttpServletResponse response) {
    URL url = null;/* ww w  .ja  v  a  2 s  .co m*/
    try {
        url = new URL(urlName);
    } catch (MalformedURLException e) {
        //Internal error, the user will receive no data.
        sendError(HTTP_STATUS.BAD_REQUEST, response);
        return;
    }
    HttpURLConnection conn = null;
    try {
        conn = (HttpURLConnection) url.openConnection();
        conn.addRequestProperty("Authorization", "Basic " + BASE64_AUTHORIZATION);
        //conn.setRequestMethod("GET");
        //conn.setDoOutput(true);
        conn.connect();
    } catch (IOException e) {
        sendError(HTTP_STATUS.INTERNAL_ERROR, response);
        return;
    }

    try (InputStream is = conn.getInputStream(); OutputStream os = response.getOutputStream()) {
        response.setContentType(conn.getContentType());
        IOUtils.copy(is, os);
    } catch (IOException e) {
        request.getServletContext().log("IO");
        sendError(HTTP_STATUS.INTERNAL_ERROR, response);
        return;
    } finally { //Close connection to save resources
        conn.disconnect();
    }
}

From source file:com.yunmel.syncretic.utils.io.IOUtils.java

/**
 * ?/*from w  ww .j a v  a  2s .  c  o  m*/
 * 
 * @param files 
 * @param out ?
 * @throws java.io.IOException
 * @throws Exception
 */
public static void zipDownLoad(File file, HttpServletResponse response) throws IOException {

    ServletOutputStream out = response.getOutputStream();
    ZipOutputStream zipout = new ZipOutputStream(out);

    zipout.setLevel(1);
    // zipout.setEncoding("GBK");
    for (File f : file.listFiles()) {
        if (f.isFile()) {
            compressFile(f, f.getName(), zipout, "");
        } else {
            compressFolder(f, f.getName(), zipout, "");
        }
    }

    zipout.finish();
    zipout.flush();
}