led-bot/lights/request.js
2020-11-12 04:48:33 -05:00

38 lines
784 B
JavaScript

import * as net from 'net';
const hostname = '192.168.1.219';
const port = 29999;
function getBinarySize(string) {
return Buffer.byteLength(string, 'utf8');
}
function padLeft(size = 4, str = '') {
let remaining = size - str.length;
return '0'.repeat(remaining) + str;
}
export default function req(data, callback, errorCallback) {
let string_data = JSON.stringify(data);
let size = getBinarySize(string_data);
if (size > 9999) {
errorCallback("too long");
return;
}
let client = new net.Socket();
client.connect(port, hostname, () => {
let res = client.write(padLeft(4, `${size}`));
if (res) {
client.write(string_data);
}
client.destroy();
callback('success.');
});
client.on('error', (e) => {
client.destroy();
errorCallback(e);
});
}