$fh = $query->upload('uploaded_file');
while (<$fh>) {
  print;
}

##</code><code>##

my @filehandles = $query->upload('filename');
foreach my $fh (@filehandles) {
   if (defined($fh)) {
      while (<$fh>) {
         print;
         # or write it out locally
      }
   }
}