Perl

Connect to FTP Through an HTTP Proxy

Demonstrates connecting through an HTTP proxy using HttpProxyHostname, HttpProxyPort, HttpProxyUsername, HttpProxyPassword, HttpProxyAuthMethod, and HttpProxyDomain.

Background: Many corporate networks force outbound traffic through an HTTP proxy, which reaches the FTP control connection via the CONNECT method — so the proxy must permit CONNECT to the FTP port. HttpProxyAuthMethod is Basic or NTLM, with HttpProxyDomain supplying the Windows domain for NTLM. This is distinct from a traditional FTP proxy, which speaks FTP itself.

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use strict;
use warnings;
use Chilkat2;

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

$ftp->Hostname('ftp.example.com');
$ftp->Username('myFtpLogin');

# The HTTP proxy through which the FTP control connection is made.  Common ports are 8080 and
# 3128.
$ftp->HttpProxyHostname('proxy.example.com');
$ftp->HttpProxyPort(8080);

# Proxy authentication, if required.  HttpProxyAuthMethod is "Basic" or "NTLM"; HttpProxyDomain
# is the Windows domain used for NTLM.
$ftp->HttpProxyUsername('myProxyLogin');
$ftp->HttpProxyPassword('myProxyPassword');
$ftp->HttpProxyAuthMethod('NTLM');
$ftp->HttpProxyDomain('CORP');

# 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;
}

print "Connected through the HTTP proxy.\n";

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