PowerShell

Set an FTP Compatibility Option

Demonstrates the Chilkat Ftp2.SetOption method, which enables or disables a named compatibility option. The only argument is the option name; matching is case-insensitive, and prefixing a recognized name with No- disables it.

Background: Real-world FTP servers have quirks, and these named options are targeted workarounds for specific ones — for example Microsoft-TLS-1.2-Workaround addresses a known interoperability issue. Most applications never need any of them; reach for SetOption only when a documented server problem calls for a specific fix, and use the exact recognized name.

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

$success = $false

#  Demonstrates the Ftp2.SetOption method, which enables or disables a named compatibility option.
#  The only argument is the option name.  Prefix a name with "No-" to disable it.

$ftp = New-Object Chilkat.Ftp2

$ftp.Hostname = "ftp.example.com"
$ftp.Username = "myFtpLogin"

#  Normally you would not hard-code the password in source.  You should instead obtain it
#  from an interactive prompt, environment variable, or a secrets vault.
$ftp.Password = "myPassword"

$success = $ftp.Connect()
if ($success -eq $false) {
    $($ftp.LastErrorText)
    exit
}

#  Enable a recognized compatibility workaround.  Option-name matching is case-insensitive.
$success = $ftp.SetOption("Microsoft-TLS-1.2-Workaround")
if ($success -eq $false) {
    $($ftp.LastErrorText)
    exit
}

#  To disable it, prefix the name with "No-":
$success = $ftp.SetOption("No-Microsoft-TLS-1.2-Workaround")
if ($success -eq $false) {
    $($ftp.LastErrorText)
    exit
}

$("Compatibility option toggled.")

$success = $ftp.Disconnect()
if ($success -eq $false) {
    $($ftp.LastErrorText)
    exit
}