Handle runtime exception with express-js

index.js

const express = require('express');
const app = express();
const http = require('http');
const server = http.createServer(app);
const xmlparser = require('express-xml-bodyparser');

app.use(xmlparser());

app.post('/xml', (req, res, next) => {
  console.log(req.body); // handle parsed xml

  res.setHeader('content-type', 'text/plain');
  return res.send('yay, xml received!');
});

app.use((err, req, res, next) => {
  console.error(err); // handle error or just log it
  return res.send('damn, something went wrong!');
})

server.listen(1337);

Example of using ExpressJS error-handling for catching malformed xml; see macedigital/express-xml-bodyparser#21.