private void handlePartialPlayback(
HttpServletRequest request,
HttpServletResponse response,
Vertex artifactVertex,
String fileName,
User user)
throws IOException {
String type = getRequiredParameter(request, "type");
InputStream in;
Long totalLength = null;
long partialStart = 0;
Long partialEnd = null;
String range = request.getHeader("Range");
if (range != null) {
response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT);
Matcher m = RANGE_PATTERN.matcher(range);
if (m.matches()) {
partialStart = Long.parseLong(m.group(1));
if (m.group(2).length() > 0) {
partialEnd = Long.parseLong(m.group(2));
}
}
}
response.setCharacterEncoding(null);
response.setContentType(type);
response.addHeader("Content-Disposition", "attachment; filename=" + fileName);
StreamingPropertyValue mediaPropertyValue = getStreamingPropertyValue(artifactVertex, type);
totalLength = mediaPropertyValue.getLength();
in = mediaPropertyValue.getInputStream();
if (partialEnd == null) {
partialEnd = totalLength;
}
// Ensure that the last byte position is less than the instance-length
partialEnd = Math.min(partialEnd, totalLength - 1);
long partialLength = totalLength;
if (range != null) {
partialLength = partialEnd - partialStart + 1;
response.addHeader(
"Content-Range", "bytes " + partialStart + "-" + partialEnd + "/" + totalLength);
if (partialStart > 0) {
in.skip(partialStart);
}
}
response.addHeader("Content-Length", "" + partialLength);
OutputStream out = response.getOutputStream();
copy(in, out, partialLength);
response.flushBuffer();
}
