Simple express example with body parsing

app.js

var express = require('express');
var bodyParser = require('body-parser');
var app = express();

var tokenChallenge = 'XXX';

/**
 * Add automatic body parsing,
 * so that you have req.body
 * available inside the route handler
 */
app.use(bodyParser.urlencoded({ extended: false }))
app.use(bodyParser.json())

/**
 * Respond to a GET request to /
 */
app.get('/', function(req, res) {
  res.send('Hello world');
});

/**
 * Respond to a POST request to /
 */
app.post('/', function(req, res) {
  /**
   * Inside here you have the following (of interest) available
   * - req.query (already parsed)
   * - req.body (already parsed)
   *
   * This is provided by express behind
   * the scenes (check out the express docs for more info)
   */

  if (req.body.token !== tokenChallenge) {
    res.send('You shall not pass!')
  } else {
    res.send('You may enter');
  }
});

app.listen(3000);