Get route definition in middleware

FWIW, two other options:

// this will only be called *after* the request has been handled
app.use(function(req, res, next) {
  res.on('finish', function() {
    console.log('R', req.route);
  });
  next();
});

// use the middleware on specific requests only
var middleware = function(req, res, next) {
  console.log('R', req.route);
  next();
};
app.get('/user/:id?', middleware, function(req, res) { ... });

What you want is req.route.path.

For example:

app.get('/user/:id?', function(req, res){
  console.log(req.route);
});

// outputs something like

{ path: '/user/:id?',
  method: 'get',
  callbacks: [ [Function] ],
  keys: [ { name: 'id', optional: true } ],
  regexp: /^\/user(?:\/([^\/]+?))?\/?$/i,
  params: [ id: '12' ] }

http://expressjs.com/api.html#req.route

---

EDIT:

As explained in the comments, getting req.route in a middleware is difficult/hacky. The router middleware is the one that populates the req.route object, and it probably is in a lower level than the middleware you're developing.

This way, getting req.route is only possible if you hook into the router middleware to parse the req for you before it's executed by Express itself.