Examples with ServletOutputStream javax.servlet.ServletOutputStream used on opensource projects

Example 81 with ServletOutputStream

use of javax.servlet.ServletOutputStream in project cuba by cuba-platform.

the class RestFileDownloadController method writeResponse.

private void writeResponse(HttpServletResponse response, UserSession userSession, FileDescriptor fd) throws IOException {
    InputStream is = null;
    ServletOutputStream os = response.getOutputStream();
    try {
        Object context = serverSelector.initContext();
        String selectedUrl = serverSelector.getUrl(context);
        if (selectedUrl == null) {
            log.debug("Unable to download file: no available server URLs");
            error(response);
        }
        while (selectedUrl != null) {
            String url = selectedUrl + fileDownloadContext + "?s=" + userSession.getId() + "&f=" + fd.getId().toString();
            HttpClient httpClient = new DefaultHttpClient();
            HttpGet httpGet = new HttpGet(url);
            try {
                HttpResponse httpResponse = httpClient.execute(httpGet);
                int httpStatus = httpResponse.getStatusLine().getStatusCode();
                if (httpStatus == HttpStatus.SC_OK) {
                    HttpEntity httpEntity = httpResponse.getEntity();
                    if (httpEntity != null) {
                        is = httpEntity.getContent();
                        IOUtils.copy(is, os);
                        os.flush();
                        break;
                    } else {
                        log.debug("Unable to download file from " + url + "\nHttpEntity is null");
                        selectedUrl = failAndGetNextUrl(context, response);
                    }
                } else {
                    log.debug("Unable to download file from " + url + "\n" + httpResponse.getStatusLine());
                    selectedUrl = failAndGetNextUrl(context, response);
                }
            } catch (IOException ex) {
                log.debug("Unable to download file from " + url + "\n" + ex);
                selectedUrl = failAndGetNextUrl(context, response);
            } finally {
                IOUtils.closeQuietly(is);
                httpClient.getConnectionManager().shutdown();
            }
        }
    } finally {
        IOUtils.closeQuietly(os);
    }
}

Example 82 with ServletOutputStream

use of javax.servlet.ServletOutputStream in project cuba by cuba-platform.

the class FileDownloadController method downloadFromMiddlewareAndWriteResponse.

protected void downloadFromMiddlewareAndWriteResponse(FileDescriptor fd, HttpServletResponse response) throws IOException {
    ServletOutputStream os = response.getOutputStream();
    try (InputStream is = fileLoader.openStream(fd)) {
        IOUtils.copy(is, os);
        os.flush();
    } catch (FileStorageException e) {
        throw new RestAPIException("Unable to download file from FileStorage", "Unable to download file from FileStorage: " + fd.getId(), HttpStatus.INTERNAL_SERVER_ERROR);
    }
}

Example 83 with ServletOutputStream

use of javax.servlet.ServletOutputStream in project production_ssm by megagao.

the class DownloadUtil method download.

/**
 * by tony 2013-10-17
 * @param byteArrayOutputStream 将文件内容写入ByteArrayOutputStream
 * @param response HttpServletResponse	写入response
 * @param returnName 返回的文件名
 */
public void download(ByteArrayOutputStream byteArrayOutputStream, HttpServletResponse response, String returnName) throws IOException {
    response.setContentType("application/octet-stream;charset=utf-8");
    // 保存的文件名,必须和页面编码一致,否则乱码
    returnName = response.encodeURL(new String(returnName.getBytes(), "iso8859-1"));
    response.addHeader("Content-Disposition", "attachment;filename=" + returnName);
    response.setContentLength(byteArrayOutputStream.size());
    // 取得输出流
    ServletOutputStream outputstream = response.getOutputStream();
    // 写到输出流
    byteArrayOutputStream.writeTo(outputstream);
    // 关闭
    byteArrayOutputStream.close();
    // 刷数据
    outputstream.flush();
}

Example 84 with ServletOutputStream

use of javax.servlet.ServletOutputStream in project VaadinUtils by rlsutton1.

the class StaticContentServlet method writeStaticResourceResponse.

private void writeStaticResourceResponse(HttpServletRequest request, HttpServletResponse response, File file) {
    try (FileInputStream fis = new FileInputStream(file);
        BufferedInputStream bis = new BufferedInputStream(fis);
        ServletOutputStream outStream = response.getOutputStream()) {
        // 4K buffer
        byte[] buf = new byte[4 * 1024];
        int bytesRead;
        while ((bytesRead = bis.read(buf)) != -1) {
            outStream.write(buf, 0, bytesRead);
        }
    } catch (Exception e) {
        logger.warn("EWengine: file not found or unable to read: '" + file + "'");
        response.setStatus(HttpServletResponse.SC_NOT_FOUND);
        return;
    }
}

Example 85 with ServletOutputStream

use of javax.servlet.ServletOutputStream in project alfresco-remote-api by Alfresco.

the class HttpRangeProcessor method processMultiRange.

/**
 * Process multiple ranges.
 *
 * @param res        HttpServletResponse
 * @param range      Range header value
 * @param ref        NodeRef to the content for streaming
 * @param property   Content Property for the content
 * @param mimetype   Mimetype of the content
 * @param userAgent  User Agent of the caller
 *
 * @return true if processed range, false otherwise
 */
private boolean processMultiRange(Object res, String range, NodeRef ref, QName property, String mimetype, String userAgent) throws IOException {
    final Log logger = getLogger();
    // Handle either HttpServletResponse or WebScriptResponse
    HttpServletResponse httpServletResponse = null;
    WebScriptResponse webScriptResponse = null;
    if (res instanceof HttpServletResponse) {
        httpServletResponse = (HttpServletResponse) res;
    } else if (res instanceof WebScriptResponse) {
        webScriptResponse = (WebScriptResponse) res;
    }
    if (httpServletResponse == null && webScriptResponse == null) {
        // Unknown response object type
        return false;
    }
    // return the sets of bytes as requested in the content-range header
    // the response will be formatted as multipart/byteranges media type message
    /* Examples of byte-ranges-specifier values (assuming an entity-body of length 10000):

       - The first 500 bytes (byte offsets 0-499, inclusive):  bytes=0-499
       - The second 500 bytes (byte offsets 500-999, inclusive):
         bytes=500-999
       - The final 500 bytes (byte offsets 9500-9999, inclusive):
         bytes=-500
       - Or bytes=9500-
       - The first and last bytes only (bytes 0 and 9999):  bytes=0-0,-1
       - Several legal but not canonical specifications of byte offsets 500-999, inclusive:
          bytes=500-600,601-999
          bytes=500-700,601-999 */
    boolean processedRange = false;
    // get the content reader
    ContentReader reader = contentService.getReader(ref, property);
    final List<Range> ranges = new ArrayList<Range>(8);
    long entityLength = reader.getSize();
    for (StringTokenizer t = new StringTokenizer(range, ", "); t.hasMoreTokens(); ) /**/
    {
        try {
            ranges.add(Range.constructRange(t.nextToken(), mimetype, entityLength));
        } catch (IllegalArgumentException err) {
            if (getLogger().isDebugEnabled())
                getLogger().debug("Failed to parse range header - returning 416 status code: " + err.getMessage());
            if (httpServletResponse != null) {
                httpServletResponse.setStatus(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE);
                httpServletResponse.setHeader(HEADER_CONTENT_RANGE, "\"*\"");
                httpServletResponse.getOutputStream().close();
            } else if (webScriptResponse != null) {
                webScriptResponse.setStatus(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE);
                webScriptResponse.setHeader(HEADER_CONTENT_RANGE, "\"*\"");
                webScriptResponse.getOutputStream().close();
            }
            return true;
        }
    }
    if (ranges.size() != 0) {
        // merge byte ranges if possible - IE handles this well, FireFox not so much
        if (userAgent == null || userAgent.indexOf("MSIE ") != -1) {
            Collections.sort(ranges);
            for (int i = 0; i < ranges.size() - 1; i++) {
                Range first = ranges.get(i);
                Range second = ranges.get(i + 1);
                if (first.end + 1 >= second.start) {
                    if (logger.isDebugEnabled())
                        logger.debug("Merging byte range: " + first + " with " + second);
                    if (first.end < second.end) {
                        // merge second range into first
                        first.end = second.end;
                    }
                    // else we simply discard the second range - it is contained within the first
                    // delete second range
                    ranges.remove(i + 1);
                    // reset loop index
                    i--;
                }
            }
        }
        // calculate response content length
        long length = MULTIPART_BYTERANGES_BOUNDRY_END.length() + 2;
        for (Range r : ranges) {
            length += r.getLength();
        }
        // output headers as we have at least one range to process
        OutputStream os = null;
        if (httpServletResponse != null) {
            httpServletResponse.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT);
            httpServletResponse.setHeader(HEADER_CONTENT_TYPE, MULTIPART_BYTERANGES_HEADER);
            httpServletResponse.setHeader(HEADER_CONTENT_LENGTH, Long.toString(length));
            os = httpServletResponse.getOutputStream();
        } else if (webScriptResponse != null) {
            webScriptResponse.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT);
            webScriptResponse.setHeader(HEADER_CONTENT_TYPE, MULTIPART_BYTERANGES_HEADER);
            webScriptResponse.setHeader(HEADER_CONTENT_LENGTH, Long.toString(length));
            os = webScriptResponse.getOutputStream();
        }
        InputStream is = null;
        try {
            for (Range r : ranges) {
                if (logger.isDebugEnabled())
                    logger.debug("Processing: " + r.getContentRange());
                try {
                    // output the header bytes for the range
                    if (os instanceof ServletOutputStream)
                        r.outputHeader((ServletOutputStream) os);
                    // output the binary data for the range
                    // need a new reader for each new InputStream
                    is = contentService.getReader(ref, property).getContentInputStream();
                    streamRangeBytes(r, is, os, 0L);
                    is.close();
                    is = null;
                    // section marker and flush stream
                    if (os instanceof ServletOutputStream)
                        ((ServletOutputStream) os).println();
                    os.flush();
                } catch (IOException err) {
                    if (getLogger().isDebugEnabled())
                        getLogger().debug("Unable to process multiple range due to IO Exception: " + err.getMessage());
                    throw err;
                }
            }
        } finally {
            if (is != null) {
                is.close();
            }
        }
        // end marker
        if (os instanceof ServletOutputStream)
            ((ServletOutputStream) os).println(MULTIPART_BYTERANGES_BOUNDRY_END);
        os.close();
        processedRange = true;
    }
    return processedRange;
}