Dart

Send a 32-bit Integer over a Socket

Demonstrates Socket.SendInt32, which sends a value as a four-byte signed integer in the selected byte order.

Background. Fixed-size integers and length prefixes are common building blocks for application-defined binary protocols. Byte order is selectable, with big-endian being network byte order.

Chilkat Dart Downloads

Download Chilkat for Dart

Dart

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;
  }

  // Send the value as a four-byte signed integer.  Use true for network byte order (big-endian) or
  // false for little-endian.
  final bBigEndian = true;
  try {
    socket.sendInt32(1000000, bBigEndian);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('32-bit integer sent.');
}