React Native

Poll a Socket for Available Data

Demonstrates Socket.PollDataAvailable, which performs a nonblocking check for readable activity and returns whether data or another read-ready condition is present.

Background. This lets an application check for incoming data without blocking, for example in an event loop that services multiple tasks.

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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;
  }

  // Perform a nonblocking check for readable data.  Returns true when data or another read-ready
  // condition is present, and false when nothing is immediately available.
  const bAvailable = await socket.pollDataAvailableAsync();
  if (!bAvailable) {
    console.log('No data is immediately available.');
  } else {
    console.log('Data is available to read.');
  }
}