Lianja

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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llSuccess = .F.

loFtp = createobject("CkFtp2")

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

//  The HTTP proxy through which the FTP control connection is made.  Common ports are 8080 and
//  3128.
loFtp.HttpProxyHostname = "proxy.example.com"
loFtp.HttpProxyPort = 8080

//  Proxy authentication, if required.  HttpProxyAuthMethod is "Basic" or "NTLM"; HttpProxyDomain
//  is the Windows domain used for NTLM.
loFtp.HttpProxyUsername = "myProxyLogin"
loFtp.HttpProxyPassword = "myProxyPassword"
loFtp.HttpProxyAuthMethod = "NTLM"
loFtp.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.
loFtp.Password = "myPassword"

llSuccess = loFtp.Connect()
if (llSuccess = .F.) then
    ? loFtp.LastErrorText
    release loFtp
    return
endif

? "Connected through the HTTP proxy."

llSuccess = loFtp.Disconnect()
if (llSuccess = .F.) then
    ? loFtp.LastErrorText
    release loFtp
    return
endif



release loFtp