(PowerShell) 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 .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

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

$ftp = New-Object Chilkat.Ftp2

$ftp.Hostname = "ftp.example.com"
$ftp.Username = "login"
$ftp.Password = "password"

$ftp.KeepSessionLog = $true

# Connect and login to the FTP server.
$success = $ftp.Connect()
if ($success -ne $true) {
    $($ftp.LastErrorText)
    exit
}

# Set the current remote directory to the root of
# the tree to be downloaded.
$success = $ftp.ChangeRemoteDir("/subDir1")
if ($success -ne $true) {
    $($ftp.LastErrorText)
    exit
}

# Recursively download all non-existant and newer files.
$mode = 2
$success = $ftp.SyncLocalTree("c:/temp/subDir1",$mode)
if ($success -ne $true) {
    $($ftp.LastErrorText)
    exit
}

$success = $ftp.Disconnect()

# Display the session log.  
$($ftp.SessionLog)