routeHandlerMiddleware.js

function logHeaders(req, res, next){
  console.log(req.headers);
  next();
}

function logURL(req, res, next){
  console.log(req.url);
  next();
}

// Pass middleware functions just like we did in app.use
app.get('/', logHeaders, logURL, function(req, res){
  res.send("Headers and URL for this request are logged.");
});