Log In After ConnectOnly on an FTP Server

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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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#include <C_CkFtp2.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkFtp2 ftp;

    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.

    ftp = CkFtp2_Create();

    CkFtp2_putHostname(ftp,"ftp.example.com");
    CkFtp2_putPort(ftp,21);

    //  First connect without logging in.
    success = CkFtp2_ConnectOnly(ftp);
    if (success == FALSE) {
        printf("%s\n",CkFtp2_lastErrorText(ftp));
        CkFtp2_Dispose(ftp);
        return;
    }

    //  Set credentials (for example, after inspecting the greeting), then log in.
    CkFtp2_putUsername(ftp,"myFtpLogin");
    CkFtp2_putPassword(ftp,"myPassword");

    success = CkFtp2_LoginAfterConnectOnly(ftp);
    if (success == FALSE) {
        printf("%s\n",CkFtp2_lastErrorText(ftp));
        CkFtp2_Dispose(ftp);
        return;
    }

    printf("Logged in.\n");

    success = CkFtp2_Disconnect(ftp);
    if (success == FALSE) {
        printf("%s\n",CkFtp2_lastErrorText(ftp));
        CkFtp2_Dispose(ftp);
        return;
    }



    CkFtp2_Dispose(ftp);

    }