screen.js

#!/usr/bin/node

const url = require('url');
const http = require('http');
const os = require('os');
const interfaces = os.networkInterfaces();
const addresses = [];

for (const interface in interfaces) {
  for (const subinterface of interfaces[interface]) {
    if (subinterface.family === 'IPv4' && !subinterface.internal) {
      addresses.push(subinterface.address);
    }
  }
}

const ipAddress = addresses[0]

// Create an instance of the http server to handle HTTP requests
let app = http.createServer((req, res) => {
    // Set a response type of plain text for the response
    res.writeHead(200, {'Content-Type': 'text/plain'});

    const { exec } = require("child_process");

    const path = url.parse(req.url).path;

    if (path == '/sleep') {
        exec("./screen_sleep.sh", (error, stdout, stderr) => {});
	res.end('Sleep');
    } else if (path == '/wake') {
	exec("./screen_wake.sh", (error, stdout, stderr) => {});
	res.end('Wake');
    } else {
        // Send back a response and end the connection
        res.end('Screen commands ready');
    }
});

app.listen(3000, ipAddress);
console.log('Node server running...');