Using filehandles in Net::FTP is simple.

open(FH, $local_file) || die "Cannot open $local_file: $!";
$ftp=put(\*FH, $remote_file) || die "Upload of $local_file to $remote_
+file failed\n";
close(FH) || die "Cannot close $local_file (?!?): $!";
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Or you can do STDIN, which I find handy when gzipping a file across FTP in real time.

$ftp=put(\*STDIN, $remote_file) || die "Upload from STDIN to $remote_f
+ile failed\n";
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You can run it from command line like this:

cat /var/log/messages |gzip -9fc | ./mystdinftp.pl
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-reid