#!/usr/bin/perl

use strict;
use warnings;
use Net::FTP;

my $srcHost = '';
my $dstHost = '';
my $path = '';
my @getFiles = ();
my @putFiles = ();

#connect to your source machine first
my $ftp = Net::FTP->new($srcHost, Timeout => 1800) or die "Cannot contact $srcHost: $!";
$ftp->login('username', 'password') or die "Cannot login ($srcHost):" . $ftp->message;
$ftp->cwd($path) or die "Cannot change directory ($srcHost):" . $ftp->message;

#then get the list of all files
@getFiles = $ftp->ls('-lR');
foreach my $file (@getFiles){
  #do whatever it is you're doing to decide if you want the file or not
  if(&SOME_FILE_TEST($file)){
    #get the file and save the name
    if($ftp->get($file)){
      push(@putFiles, $file);
    }else{
      warn $ftp->message;
    }
  }
}
unless($ftp->quit){
  undef $ftp;
  warn "Could not close the connection cleanly: $!";
}

#now you need to connect to the destination server
$ftp = Net::FTP->new($dstHost, Timeout => 1800) or die "Cannot contact $dstHost: $!";
$ftp->login('username', 'password') or die "Cannot login ($dstHost):" . $ftp->message;
$ftp->cwd($path) or die "Cannot change directory ($dstHost):" . $ftp->message;

foreach my $file (@putFiles){
  unless($ftp->put($file)){
    warn "Failed to put $file:  " . $ftp->message;
  }
}

$ftp->quit or die "Could not close the connection cleanly: $!";

sub SOME_FILE_TEST{
  #do whatever you want here
  return 1;
}