filmout_display/test/test_messages.js

const net = require('net');

const serverAddress = 'localhost';
const serverPort = 8081;

const client = new net.Socket();

console.log(`Connecting to ${serverAddress}:${serverPort}...`);

async function delay (ms) {
    return new Promise((resolve, reject) => {
        return setTimeout(resolve, ms);
    });
}

client.connect(serverPort, serverAddress, async () => {
    const data = {
        action : 1,
        image: 'filename.tif',
    };
    console.log('SENDING');
    console.log(data);
    client.write(JSON.stringify(data));
    await delay(2000);
    data.action = 2;
    console.log('SENDING');
    console.log(data);
    client.write(JSON.stringify(data));
});

client.on('data', (data) => {
    console.log('RECEIVED');
    console.log(data.toString());
});

client.on('close', () => {
    console.log('Closing connection');
});

client.on('error', (err) => {
    console.error('Error:', err);
});