(Ruby) 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 Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require '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(true)

# Connect and login to the FTP server.
success = ftp.Connect()
if (success != true)
    print ftp.lastErrorText() + "\n";
    exit
end

# Set the current remote directory to the root of
# the tree to be downloaded.
success = ftp.ChangeRemoteDir("/subDir1")
if (success != true)
    print ftp.lastErrorText() + "\n";
    exit
end

# Recursively download all non-existant and newer files.
mode = 2
success = ftp.SyncLocalTree("c:/temp/subDir1",mode)
if (success != true)
    print ftp.lastErrorText() + "\n";
    exit
end

success = ftp.Disconnect()

# Display the session log.  
print ftp.sessionLog() + "\n";