React Native

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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React Native

import { Ftp2 } from '@chilkat/react-native'

async function chilkatExample() {
  // 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.

  const ftp = new Ftp2();

  ftp.hostname = 'ftp.example.com';
  ftp.port = 21;

  // First connect without logging in.
  try {
    await ftp.connectOnlyAsync();
  } catch {
    console.log(ftp.lastErrorText);
    return;
  }

  // Set credentials (for example, after inspecting the greeting), then log in.
  ftp.username = 'myFtpLogin';
  ftp.password = 'myPassword';

  try {
    await ftp.loginAfterConnectOnlyAsync();
  } catch {
    console.log(ftp.lastErrorText);
    return;
  }

  console.log('Logged in.');

  try {
    await ftp.disconnectAsync();
  } catch {
    console.log(ftp.lastErrorText);
    return;
  }
}