PureBasic

Log In After ConnectOnly on an FTP Server

Demonstrates the Chilkat Ftp2.LoginAfterConnectOnly method, which authenticates a control connection previously established by ConnectOnly. It takes no arguments, sends USER, PASS, and ACCT when required, then performs normal post-login initialization.

Background: This is the second half of the two-step connect. Beyond sending the credentials, it runs the same post-login setup Connect would — for example issuing TYPE I and any auto-negotiated features — so the session ends up in the same ready state either way. The value of the split is entirely in what you can do in the gap between the two calls.

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IncludeFile "CkFtp2.pb"

Procedure ChilkatExample()

    success.i = 0

    ;  Demonstrates the Ftp2.LoginAfterConnectOnly method, which authenticates a control connection
    ;  previously established by ConnectOnly.  It takes no arguments and sends USER, PASS, and (when
    ;  required) ACCT, then performs normal post-login initialization.

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

    CkFtp2::setCkHostname(ftp, "ftp.example.com")
    CkFtp2::setCkPort(ftp, 21)

    ;  First connect without logging in.
    success = CkFtp2::ckConnectOnly(ftp)
    If success = 0
        Debug CkFtp2::ckLastErrorText(ftp)
        CkFtp2::ckDispose(ftp)
        ProcedureReturn
    EndIf

    ;  Set credentials (for example, after inspecting the greeting), then log in.
    CkFtp2::setCkUsername(ftp, "myFtpLogin")
    CkFtp2::setCkPassword(ftp, "myPassword")

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

    Debug "Logged in."

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



    CkFtp2::ckDispose(ftp)


    ProcedureReturn
EndProcedure