Perl

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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use strict;
use warnings;
use Chilkat2;

# 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.

my $ftp = Chilkat2::Ftp2->new;

$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');

my $success = $ftp->Connect();
if (!$success) {
    print $ftp->LastErrorText, "\n";
    exit;
}

# Enable a recognized compatibility workaround.  Option-name matching is case-insensitive.
$success = $ftp->SetOption('Microsoft-TLS-1.2-Workaround');
if (!$success) {
    print $ftp->LastErrorText, "\n";
    exit;
}

# To disable it, prefix the name with "No-":
$success = $ftp->SetOption('No-Microsoft-TLS-1.2-Workaround');
if (!$success) {
    print $ftp->LastErrorText, "\n";
    exit;
}

print "Compatibility option toggled.\n";

$success = $ftp->Disconnect();
if (!$success) {
    print $ftp->LastErrorText, "\n";
    exit;
}