/// <summary>Send a partial content response with the given range.</summary>
/// <remarks>
/// 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.
/// </remarks>
/// <param name="in">stream to read from</param>
/// <param name="out">stream to write to</param>
/// <param name="response">http response to use</param>
/// <param name="contentLength">for the response header</param>
/// <param name="ranges">to write to respond with</param>
/// <exception cref="System.IO.IOException">on error sending the response</exception>
internal static void SendPartialData(FSDataInputStream @in, OutputStream @out, HttpServletResponse
response, long contentLength, IList <InclusiveByteRange> ranges)
{
if (ranges == null || ranges.Count != 1)
{
response.SetContentLength(0);
response.SetStatus(HttpServletResponse.ScRequestedRangeNotSatisfiable);
response.SetHeader("Content-Range", InclusiveByteRange.To416HeaderRangeString(contentLength
));
}
else
{
InclusiveByteRange singleSatisfiableRange = ranges[0];
long singleLength = singleSatisfiableRange.GetSize(contentLength);
response.SetStatus(HttpServletResponse.ScPartialContent);
response.SetHeader("Content-Range", singleSatisfiableRange.ToHeaderRangeString(contentLength
));
CopyFromOffset(@in, @out, singleSatisfiableRange.GetFirst(contentLength), singleLength
);
}
}