Node.js

Upgrade an FTP Control Channel to TLS (ConvertToTls)

Demonstrates the Chilkat Ftp2.ConvertToTls method, which upgrades an already-connected clear FTP control channel to explicit TLS. It takes no arguments and is used with a manually staged connection created by ConnectOnly while Ssl is disabled.

Background: This exposes the explicit-FTPS AUTH TLS upgrade as a discrete step for the rare case where you need to do something on the clear connection first — inspect the greeting, apply a workaround — before securing it. In the normal case you simply set AuthTls and let Connect perform the upgrade automatically; this manual path exists for staged control.

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function chilkatExample() {

    var success = false;

    //  Demonstrates the Ftp2.ConvertToTls method, which upgrades an already-connected clear FTP control
    //  channel to explicit TLS.  It takes no arguments.  It is used with a manually staged connection
    //  created by ConnectOnly while Ssl is disabled.

    var ftp = new chilkat.Ftp2();

    ftp.Hostname = "ftp.example.com";
    ftp.Port = 21;

    //  Connect in clear text first (Ssl is false).
    success = ftp.ConnectOnly();
    if (success == false) {
        console.log(ftp.LastErrorText);
        return;
    }

    //  Upgrade the control channel to explicit TLS (AUTH TLS).
    success = ftp.ConvertToTls();
    if (success == false) {
        console.log(ftp.LastErrorText);
        return;
    }

    //  Now authenticate over the encrypted control channel.
    ftp.Username = "myFtpLogin";
    ftp.Password = "myPassword";
    success = ftp.LoginAfterConnectOnly();
    if (success == false) {
        console.log(ftp.LastErrorText);
        return;
    }

    console.log("Control channel upgraded to TLS and logged in.");

    success = ftp.Disconnect();
    if (success == false) {
        console.log(ftp.LastErrorText);
        return;
    }


}

chilkatExample();