C++

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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C++

#include <CkFtp2.h>

void ChilkatSample(void)
    {
    bool success = false;

    //  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.

    CkFtp2 ftp;

    ftp.put_Hostname("ftp.example.com");
    ftp.put_Port(21);

    //  First connect without logging in.
    success = ftp.ConnectOnly();
    if (success == false) {
        std::cout << ftp.lastErrorText() << "\r\n";
        return;
    }

    //  Set credentials (for example, after inspecting the greeting), then log in.
    ftp.put_Username("myFtpLogin");
    ftp.put_Password("myPassword");

    success = ftp.LoginAfterConnectOnly();
    if (success == false) {
        std::cout << ftp.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "Logged in." << "\r\n";

    success = ftp.Disconnect();
    if (success == false) {
        std::cout << ftp.lastErrorText() << "\r\n";
        return;
    }
    }