server.js

const fs = require('fs');
const http = require('http');

const WebSocketServer = require('ws').Server;

const server = http
  .createServer((req, res) => {
    console.log(req.method, req.url);

    if (req.method === 'POST' && req.url.startsWith('/upload')) {
      const chunks = [];

      req.on('data', chunk => chunks.push(chunk));
      req.on('end', () => {
        const data = Buffer.concat(chunks);

        res.writeHead(200, { 'Content-Type': 'text/plain' });

        if (req.url.split('=').pop() === String(data.length)) {
          res.end('DONE');
        } else {
          res.end('');
        }
      });
    } else if (req.method === 'GET' && req.url.startsWith('/no-content')) {
      res.writeHead(204);
      res.end();
    } else {
      res.writeHead(405, { 'Content-Type': 'text/plain' });
      res.end('');
    }
  })
  .listen(7232);

const wss = new WebSocketServer({
  server,
});

wss.on('connection', ws => {
  ws.on('message', d => {
    if (d instanceof Buffer) {
      ws.send('DONE');
    } else {
      ws.send('');
    }
  });

  ws.send(fs.readFileSync('./font.ttf'));
});