Check Whether a Socket Is Writable

See more Socket/SSL/TLS Examples

Demonstrates Socket.CheckWriteable, which waits for the connected socket to become writable. It returns 1 if writable, 0 if it did not become writable before the timeout, or -1 on error.

import 'package:chilkat/chilkat.dart';

void main() {
  final socket = CkSocket();

  // Connect to the server using TLS.
  final bTls = true;
  final maxWaitMs = 5000;
  try {
    socket.connect('example.com', 5000, bTls, maxWaitMs);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Wait up to 5 seconds for the socket to become writable.  Returns 1 if writable, 0 if it did not
  // become writable before the timeout, or -1 on error.
  final writable = socket.checkWriteable(5000);
  if (writable < 0) {
    print(socket.lastErrorText);
    return;
  }

  if (writable != 1) {
    print('The socket did not become writable before the timeout.');
    return;
  }

  print('The socket is writable.');
}