Receive Text up to a Match into a StringBuilder

See more Socket/SSL/TLS Examples

Demonstrates Socket.ReceiveUntilMatchSb, which receives bytes until an exact byte sequence is found and appends the received text to a StringBuilder.

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

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

  // Connect to the server using TLS.  The 3rd argument enables the TLS handshake after the TCP
  // connection succeeds; the 4th is the maximum time to wait, in milliseconds.
  const bTls = true;
  const maxWaitMs = 5000;
  try {
    await socket.connectAsync('example.com', 5000, bTls, maxWaitMs);
  } catch {
    console.log(socket.lastErrorText);
    return;
  }

  // StringCharset controls the character encoding used when sending and receiving text.
  socket.stringCharset = 'utf-8';
  // Send a request using a simple application-defined text protocol in which each message ends with a
  // CRLF.
  const command = 'STATUS\r\n';
  try {
    await socket.sendStringAsync(command);
  } catch {
    console.log(socket.lastErrorText);
    return;
  }

  // Receive bytes until an exact byte sequence is found, appending the received text to a
  // StringBuilder.  The match may span multiple underlying network reads.
  const sb = new StringBuilder();
  try {
    await socket.receiveUntilMatchSbAsync('<EOM>', sb);
  } catch {
    console.log(socket.lastErrorText);
    return;
  }

  let response: string;
  try {
    response = sb.getAsString();
  } catch {
    console.log(sb.lastErrorText);
    return;
  }

  console.log(response);
}