Thanks for being persistent! This is exactly the kind of thing I've been looking for as an example!

I find it kind of interesting that you get around the thing I didn't see in HTML::Form by going and getting the form and then searching it for the right thing and filling it out blindly. I hadn't thought of doing that; it would be good errorchecking - make sure you can get to the site before submitting.

For reference, here is some code I wrote when I was still trying to use libwww-perl (it didn't work, can you tell me why? (serious query)):

#!/usr/bin/perl

 use HTTP::Request::Common;
 use LWP::UserAgent;
 use CGI qw(header -no_debug);
 my $URL = 'https://www.mydomain.com/upload.html';
 my $req = POST $URL,
 Content_Type => 'form-data',
 Content      => [
 user   => 'username',
 pass   => 'password',
 FILE   => ['./binaryfile'], # this file will be uploaded
 ];
 my $res = LWP::UserAgent->new->request($req);
 print header, $res->is_success ? $res->content :
 $res->status_line;
[download]

Yes, yes, Carp, strict, -w and all that. Consider it read, for conciseness' sake. Maybe I'll try it again using HTML::Form.