server.js

var http = require('http');
var port = 1234;
http.createServer(function (req, resp) {
  var body = [];
  req.on('data', function (chunk) { body.push(chunk); });
  req.on('end', function () {
    body = Buffer.concat(body).toString();
    console.log({headers: req.headers, method: req.method, body: body});
    resp.writeHead(200, {'Content-Type': 'text/plain'});
    resp.end('OK');
  });
}).listen(port);
console.log('Server listening on port', port);

// $ node server.js
// $ curl -i localhost:1234
// $ curl -i -X POST localhost:1234 -H 'Content-Type: application/json' -d '{}'