Nodejs Express implicit middleware applied to all routes?

Question

I wanted to know if Express would let me create a route middleware that would be called by default without me explicitly placing it on the app.get() arg list?

// NodeJS newb

var data = { title: 'blah' };

// So I want to include this in every route
function a(){
  return function(req, res){
    req.data = data;
  };
};

app.get('/', function(req, res) {
  res.render('index', { title: req.data.title });
};

I understand I can do app.set('data', data) and access it via req.app.settings.data in the route. Which would probably satisfy my simple example above.

Answer 1

function a(req, res, next){
  req.data = data;
  // Update: based on latest version of express, better use this
  res.locals.data = data;
  next();
};

app.get('/*', a);

See the examples on the Express docs, Middleware section.