How to obtain the next route's path in an Express app

Question

I am catching all traffic before passing it forward using:

app.all('*', function(req, res, next) {
    ... run before stuff, related to the next req.route.path
    next();
});

and I want to run some code before calling the next() function. in order for me to know the proper code I need to run, I have to identify what is the next request route path.

Debugging current req object (inside all('*',.. ) does not giving any information about the next request.route.path

How can I get the next method route.path before calling it?

Your help will be appreciated. Thank you.

Answer 1

Instead of trying to look ahead, why not explicitly set middleware for the routes that need it?

var middleware = function (req, res, next) {
  ..run your code in here
};

app.get('/users:user_id', middleware, function(req, res, next) {

}); 

Answer 2

You can get the next route by checking the route when the response in the middleware has fired the finish event:

app.all('*', function(req, res, next) {
  res.on('finish', function() {
    console.log('Next route: ', req.route.path);
  });
  next();
});

For a route defined like this:

app.get('/users/:user_id', function(req, res) {
  res.send('Hello');
});

You'll obtain the log:

$ Next route: '/users/:user_id'