Exemplo n.º 1
0
 /**
  * Send a partial content response with the given range. If there are no satisfiable ranges, or if
  * multiple ranges are requested, which is unsupported, respond with range not satisfiable.
  *
  * @param in stream to read from
  * @param out stream to write to
  * @param response http response to use
  * @param contentLength for the response header
  * @param ranges to write to respond with
  * @throws IOException on error sending the response
  */
 static void sendPartialData(
     FSInputStream in,
     OutputStream out,
     HttpServletResponse response,
     long contentLength,
     List<InclusiveByteRange> ranges)
     throws IOException {
   if (ranges == null || ranges.size() != 1) {
     response.setContentLength(0);
     response.setStatus(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE);
     response.setHeader("Content-Range", InclusiveByteRange.to416HeaderRangeString(contentLength));
   } else {
     InclusiveByteRange singleSatisfiableRange = ranges.get(0);
     long singleLength = singleSatisfiableRange.getSize(contentLength);
     response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT);
     response.setHeader(
         "Content-Range", singleSatisfiableRange.toHeaderRangeString(contentLength));
     copyFromOffset(in, out, singleSatisfiableRange.getFirst(contentLength), singleLength);
   }
 }
Exemplo n.º 2
0
  @SuppressWarnings("unchecked")
  public void doGet(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    final String path = ServletUtil.getDecodedPath(request, "/streamFile");
    final String rawPath = ServletUtil.getRawPath(request, "/streamFile");
    final String filename = JspHelper.validatePath(path);
    final String rawFilename = JspHelper.validatePath(rawPath);
    if (filename == null) {
      response.setContentType("text/plain");
      PrintWriter out = response.getWriter();
      out.print("Invalid input");
      return;
    }

    Enumeration<String> reqRanges = request.getHeaders("Range");
    if (reqRanges != null && !reqRanges.hasMoreElements()) {
      reqRanges = null;
    }

    DFSClient dfs;
    try {
      dfs = getDFSClient(request);
    } catch (InterruptedException e) {
      response.sendError(400, e.getMessage());
      return;
    }

    DFSInputStream in = null;
    OutputStream out = null;

    try {
      in = dfs.open(filename);
      out = response.getOutputStream();
      final long fileLen = in.getFileLength();
      if (reqRanges != null) {
        List<InclusiveByteRange> ranges = InclusiveByteRange.satisfiableRanges(reqRanges, fileLen);
        StreamFile.sendPartialData(in, out, response, fileLen, ranges);
      } else {
        // No ranges, so send entire file
        response.setHeader("Content-Disposition", "attachment; filename=\"" + rawFilename + "\"");
        response.setContentType("application/octet-stream");
        response.setHeader(CONTENT_LENGTH, "" + fileLen);
        StreamFile.copyFromOffset(in, out, 0L, fileLen);
      }
      in.close();
      in = null;
      out.close();
      out = null;
      dfs.close();
      dfs = null;
    } catch (IOException ioe) {
      if (LOG.isDebugEnabled()) {
        LOG.debug("response.isCommitted()=" + response.isCommitted(), ioe);
      }
      throw ioe;
    } finally {
      IOUtils.cleanup(LOG, in);
      IOUtils.cleanup(LOG, out);
      IOUtils.cleanup(LOG, dfs);
    }
  }