Hey!

I just checked out the W3's site for the definition of the HTTP/1.1 Header and found that the field that you need to set is 'Content lenght'.

So just in case anyone later on in life if curious I needed to add this to my code:

  $self->header_props( {
    -type           => $types->mimeTypeOf($path),
    -attachment     => $filename,
    -Content_length => $fsize,
  } );
[download]

Thanks all!