mod_perl 1.29: send_fh(): result status?

I'm programming a web application that limits the number of downloads for clients on certain files:

....
unless ( $r->header_only ) {
  $r->send_fd($fh);
  $self->record_download($user_id, $file_id);
}
close($fh);

I'd like to be able to have some sort of confirmation that the file was sent / received in entirety before recording the download; if the download times out for whatever reason for the client, the download will not be recorded.

Is this something that's possible in general? with mod_perl?

-Brian
.

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