(Perl) Synchronize Local Directory Tree

Downloads files from the FTP server to a local directory tree. Synchronization modes include:

mode=0: Download all files
mode=1: Download all files that do not exist on the local filesystem.
mode=2: Download newer or non-existant files.
mode=3: Download only newer files. If a file does not already exist on the local filesystem, it is not downloaded from the server..
mode=5: Download only missing files or files with size differences.
mode=6: Same as mode 5, but also download newer files.
mode=99: Do not download files, but instead delete remote files that do not exist locally.

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

$ftp = chilkat::CkFtp2->new();

$ftp->put_Hostname("ftp.example.com");
$ftp->put_Username("login");
$ftp->put_Password("password");

$ftp->put_KeepSessionLog(1);

# Connect and login to the FTP server.
$success = $ftp->Connect();
if ($success != 1) {
    print $ftp->lastErrorText() . "\r\n";
    exit;
}

# Set the current remote directory to the root of
# the tree to be downloaded.
$success = $ftp->ChangeRemoteDir("/subDir1");
if ($success != 1) {
    print $ftp->lastErrorText() . "\r\n";
    exit;
}

# Recursively download all non-existant and newer files.
$mode = 2;
$success = $ftp->SyncLocalTree("c:/temp/subDir1",$mode);
if ($success != 1) {
    print $ftp->lastErrorText() . "\r\n";
    exit;
}

$success = $ftp->Disconnect();

# Display the session log.  
print $ftp->sessionLog() . "\r\n";