Everything? perldoc
CGI
http://search.cpan.org/~lds/CGI.pm-3.49/lib/CGI.pm#PROCESSING_A_FILE_UPLOAD_FIELD
$lightweight_fh = $q->upload('field_name');
# undef may be returned if it's not a valid file handle
if (defined $lightweight_fh) {
# Upgrade the handle to one compatible with IO::Handle:
my $io_handle = $lightweight_fh->handle;
open (OUTFILE,'>>','/usr/local/web/users/feedback');
while ($bytesread = $io_handle->read($buffer,1024)) {
print OUTFILE $buffer;
}
}
or
$filename = $query->param('uploaded_file');
$tmpfilename = $query->tmpFileName($filename);
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