i-have-your-ip-address/src/index.ts

import Express from 'express';
import fs from 'fs';
import path from 'path';
import makeVideo from './ffmpeg';

let p = path.join(__dirname, '..', 'tmp');
if (!fs.existsSync(p)) fs.mkdirSync(p);

const app = Express();

app.get('/', async (req, res) => {
    let ip = req.header('X-Forwarded-For')?.split(', ')[0] || req.ip;
    let filePath = await makeVideo(ip);
    res.sendFile(filePath);
});

app.listen(6969);