أمثلة API لـSuper Screen: اتصال WebSocket محلي

import { randomBytes } from 'node:crypto';

const host = process.env.SCREEN_IP;
const port = Number(process.env.SCREEN_PORT);
const token = process.env.SCREEN_CONTROL_CODE ?? '';
if (!host || !/^[a-zA-Z0-9.-]+$/.test(host) ||
    !Number.isInteger(port) || port < 1 || port > 65535 ||
    !/^\d{6}$/.test(token)) {
  throw new Error('Set SCREEN_IP, SCREEN_PORT and SCREEN_CONTROL_CODE');
}
const endpoint = new URL(`ws://${host}:${port}/order`);
endpoint.search = new URLSearchParams({ token, rid: 'energy-pilot', rname: 'Energy pilot' }).toString();
const mid = randomBytes(4).toString('hex');
const socket = new WebSocket(endpoint);
let done = false;
function finish(failed) {
  if (done) return;
  done = true;
  clearTimeout(timer);
  process.exitCode = failed ? 1 : 0;
  socket.close();
}
const timer = setTimeout(() => {
  console.error('Reply timeout; verify state before retrying a control action');
  finish(true);
}, 8000);
socket.addEventListener('open', () => {
  if (!done) socket.send(JSON.stringify({
    mid, data: { screen: { action: 'list' } }, ts: Date.now(),
  }));
});
socket.addEventListener('message', (event) => {
  if (done) return;
  let reply;
  try { reply = JSON.parse(String(event.data)); } catch { return; }
  if (!reply || typeof reply !== 'object' || reply.mid !== mid) return;
  console.log(JSON.stringify(reply, null, 2));
  finish(reply.ret === 'error');
});
socket.addEventListener('error', () => {
  if (!done) console.error('Connection failed; check network, port and control code');
  finish(true);
});
socket.addEventListener('close', () => {
  if (!done) {
    console.error('Connection closed before a correlated reply');
    finish(true);
  }
});

{"web":{"area":"a1","url":"https://iotdevices.org/zh/solutions/energy-management","interval":60}}
{"web":{"area":"a1"}}