Upgrade a Plain TCP Connection to TLS

See more Socket/SSL/TLS Examples

Demonstrates Socket.ConvertToSsl, which upgrades an already-connected plain TCP socket to TLS by performing a client-side TLS handshake over the existing connection.

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

async function chilkatExample() {
  const socket = new Socket();

  // Connect as plain TCP (no TLS yet).
  const bTls = false;
  const maxWaitMs = 5000;
  try {
    await socket.connectAsync('example.com', 5000, bTls, maxWaitMs);
  } catch {
    console.log(socket.lastErrorText);
    return;
  }

  // At the point where the application protocol permits a STARTTLS-style upgrade, perform any required
  // negotiation, then upgrade the existing connection to TLS with a client-side handshake.
  try {
    await socket.convertToSslAsync();
  } catch {
    console.log(socket.lastErrorText);
    return;
  }

  console.log('Connection upgraded to TLS.');
}