string [] SplitHeader (int header_index)
{
string [] result = null;
string header = worker_request.GetKnownRequestHeader (header_index);
if (header != null && header != "" && header.Trim () != "") {
result = header.Split (',');
for (int i = result.Length - 1; i >= 0; i--)
result [i] = result [i].Trim ();
}
return result;
}