PHP Extension

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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PHP Extension

<?php

include("chilkat.php");

$success = false;

$ftp = new CkFtp2();

$ftp->put_Hostname('ftp.example.com');
$ftp->put_Username('myFtpLogin');

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

//  Proxy authentication, if required.  HttpProxyAuthMethod is "Basic" or "NTLM"; HttpProxyDomain
//  is the Windows domain used for NTLM.
$ftp->put_HttpProxyUsername('myProxyLogin');
$ftp->put_HttpProxyPassword('myProxyPassword');
$ftp->put_HttpProxyAuthMethod('NTLM');
$ftp->put_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->put_Password('myPassword');

$success = $ftp->Connect();
if ($success == false) {
    print $ftp->lastErrorText() . "\n";
    exit;
}

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

$success = $ftp->Disconnect();
if ($success == false) {
    print $ftp->lastErrorText() . "\n";
    exit;
}


?>