public static async Task _SendFileContents(this HttpResponse h, FileBase file, long offset, long?count, string contentsType = Consts.MimeTypes.OctetStream, CancellationToken cancel = default)
{
CheckStreamRange(offset, count, file.Size);
using (FileStream srcStream = file.GetStream(false))
{
if (offset > 0)
{
srcStream.Seek(offset, SeekOrigin.Begin);
}
await h._SendStreamContents(srcStream, count, contentsType, cancel);
}
}