private IList <InclusiveByteRange> StrToRanges(string s, int contentLength)
{
IList <string> l = Arrays.AsList(new string[] { "bytes=" + s });
Enumeration <object> e = (new Vector <string>(l)).GetEnumerator();
return(InclusiveByteRange.SatisfiableRanges(e, contentLength));
}
/// <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
);
}
}
/// <exception cref="Javax.Servlet.ServletException"/>
/// <exception cref="System.IO.IOException"/>
protected override void DoGet(HttpServletRequest request, HttpServletResponse response
)
{
string path = ServletUtil.GetDecodedPath(request, "/streamFile");
string rawPath = ServletUtil.GetRawPath(request, "/streamFile");
string filename = JspHelper.ValidatePath(path);
string rawFilename = JspHelper.ValidatePath(rawPath);
if (filename == null)
{
response.SetContentType("text/plain");
PrintWriter @out = response.GetWriter();
@out.Write("Invalid input");
return;
}
Enumeration <string> reqRanges = request.GetHeaders("Range");
if (reqRanges != null && !reqRanges.MoveNext())
{
reqRanges = null;
}
DFSClient dfs;
try
{
dfs = GetDFSClient(request);
}
catch (Exception e)
{
response.SendError(400, e.Message);
return;
}
HdfsDataInputStream @in = null;
OutputStream out_1 = null;
try
{
@in = dfs.CreateWrappedInputStream(dfs.Open(filename));
out_1 = response.GetOutputStream();
long fileLen = @in.GetVisibleLength();
if (reqRanges != null)
{
IList <InclusiveByteRange> ranges = InclusiveByteRange.SatisfiableRanges(reqRanges
, fileLen);
StreamFile.SendPartialData(@in, out_1, response, fileLen, ranges);
}
else
{
// No ranges, so send entire file
response.SetHeader("Content-Disposition", "attachment; filename=\"" + rawFilename
+ "\"");
response.SetContentType("application/octet-stream");
response.SetHeader(ContentLength, string.Empty + fileLen);
StreamFile.CopyFromOffset(@in, out_1, 0L, fileLen);
}
@in.Close();
@in = null;
out_1.Close();
out_1 = null;
dfs.Close();
dfs = null;
}
catch (IOException ioe)
{
if (Log.IsDebugEnabled())
{
Log.Debug("response.isCommitted()=" + response.IsCommitted(), ioe);
}
throw;
}
finally
{
IOUtils.Cleanup(Log, @in);
IOUtils.Cleanup(Log, out_1);
IOUtils.Cleanup(Log, dfs);
}
}