PureBasic

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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PureBasic

IncludeFile "CkFtp2.pb"

Procedure ChilkatExample()

    success.i = 0

    ftp.i = CkFtp2::ckCreate()
    If ftp.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkFtp2::setCkHostname(ftp, "ftp.example.com")
    CkFtp2::setCkUsername(ftp, "myFtpLogin")

    ;  The HTTP proxy through which the FTP control connection is made.  Common ports are 8080 and
    ;  3128.
    CkFtp2::setCkHttpProxyHostname(ftp, "proxy.example.com")
    CkFtp2::setCkHttpProxyPort(ftp, 8080)

    ;  Proxy authentication, if required.  HttpProxyAuthMethod is "Basic" or "NTLM"; HttpProxyDomain
    ;  is the Windows domain used for NTLM.
    CkFtp2::setCkHttpProxyUsername(ftp, "myProxyLogin")
    CkFtp2::setCkHttpProxyPassword(ftp, "myProxyPassword")
    CkFtp2::setCkHttpProxyAuthMethod(ftp, "NTLM")
    CkFtp2::setCkHttpProxyDomain(ftp, "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.
    CkFtp2::setCkPassword(ftp, "myPassword")

    success = CkFtp2::ckConnect(ftp)
    If success = 0
        Debug CkFtp2::ckLastErrorText(ftp)
        CkFtp2::ckDispose(ftp)
        ProcedureReturn
    EndIf

    Debug "Connected through the HTTP proxy."

    success = CkFtp2::ckDisconnect(ftp)
    If success = 0
        Debug CkFtp2::ckLastErrorText(ftp)
        CkFtp2::ckDispose(ftp)
        ProcedureReturn
    EndIf



    CkFtp2::ckDispose(ftp)


    ProcedureReturn
EndProcedure