Perl

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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Perl

use chilkat();

$success = 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 = chilkat::CkFtp2->new();

$ftp->put_Hostname("ftp.example.com");
$ftp->put_Port(21);

#  First connect without logging in.
$success = $ftp->ConnectOnly();
if ($success == 0) {
    print $ftp->lastErrorText() . "\r\n";
    exit;
}

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

$success = $ftp->LoginAfterConnectOnly();
if ($success == 0) {
    print $ftp->lastErrorText() . "\r\n";
    exit;
}

print "Logged in." . "\r\n";

$success = $ftp->Disconnect();
if ($success == 0) {
    print $ftp->lastErrorText() . "\r\n";
    exit;
}