express rerouting middleware

exemple.js

//
// middleware module
//
module.exports.reroute = function(url, func) {
  return function(req, res, next) {
    if(req.url.split('?', 1).pop() === url) {
      req.url = func(req, res);
      req.authorized = true;
    }
    next();
  }
};

//
// usage
//
app.use(middleware.reroute('/v1/user', function(req, res) {
  return '/v1/users/' + req.user.id;
}));