title: ReactiveX Observable from NodeJS Express 'post'
body: <p>Is it possible to create an ReactiveX Observable from:</p>
  
  <pre><code>app = express();
  app.post('/path', function() {...})
  </code></pre>
  
  <p>?</p>
  
  <p>I mean, there exists a way to create an observable <code>fromEvent</code> in which I already used for lots of events that were registered using <code>object.on('eventName', function(){})</code> but the post from express is not exactly like that.</p>