Ruby

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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Ruby

require 'chilkat'

success = false

ftp = Chilkat::CkFtp2.new()

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
end

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

success = ftp.Disconnect()
if (success == false)
    print ftp.lastErrorText() + "\n";
    exit
end