I was searching through the categorize Q&A, and mccormi asked a question that was a problem i had given up on a while back.
I'm not sure whether the problem is related to my ignorance or the module, but here's what i've discovered:

Net::FTP doesn't support any sort of variable uploads, just named files, and filehandles.
With the objective being to upload without using a file on the network, (useful for me, for example, when i want to upload a zipped (tgz'd) backup of a filesystem, too large to write to disk first), my first line of thought was "hmm... it takes filehandles, see if STDIN works"... and it does: 

$ftp = Net::FTP->new($destserv) || die "error connecting\n";
$ftp->login($destuser,$destpass);
$ftp->binary();
$ftp->put(*STDIN,$remotefile) or die "error uploading\n";
$ftp->quit();

[download]

This will solve the issue at hand, by allowing a first script to pipe data into the STDIN of this script, to upload data without a file. However, I don't see why this has to be written with two processes. So, my second line of thought was "hmmm... it takes filehandles, use tie"... So, using IO::Scalar I wrote this: 

my $data="FOOBAR";

tie *FOO, 'IO::Scalar',\$data;

$ftp = Net::FTP->new($destserv) || die "error connecting\n";
$ftp->login($destuser,$destpass);
$ftp->binary();
$ftp->put(*FOO,"remotelogfile") or die "error uploading\n";
$ftp->quit();

[download]

and while this scalar works for me as a FILE with normal filehandle usage, 

while (<FOO>){print $_;}
print FOO "hi";

[download]

in this particular module, i get the following error:

Cannot open Local file *main::FOO: No such file or directory at ./netftpcgi.pl line 18
error uploading

This leads me to believe that for some reason, *main::FOO is different than *main::STDIN and that Net::FTP can tell. If anyone would help me with my logic, I'd appreciate it.

In reply to Inconsistancy within Net::FTP? by vaevictus

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