React Native

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.

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React Native

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

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

  // Connect to the server using TLS.
  const bTls = true;
  const maxWaitMs = 5000;
  try {
    await socket.connectAsync('example.com', 5000, bTls, maxWaitMs);
  } catch {
    console.log(socket.lastErrorText);
    return;
  }

  // Send the value as a four-byte signed integer.  Use true for network byte order (big-endian) or
  // false for little-endian.
  const bBigEndian = true;
  try {
    await socket.sendInt32Async(1000000, bBigEndian);
  } catch {
    console.log(socket.lastErrorText);
    return;
  }

  console.log('32-bit integer sent.');
}