node-express too many redirects

Question

I've got my routes set up like below

When i navigate to 'http://localhost/' i get an error saying 'localhost redirected you too many times' and the URL of the page (showing in the URL bar of the browser) is http://localhost/!/dashboard - so it does look like it is being redirected, but i cannot see why it's getting stuck in an infinite loop

 // Public Routes
 app.use('/', function(req,res){
      res.redirect('/!/dashboard');
 });
 app.use('/login', routes.login);
 app.use('/!/dashboard', isLoggedIn, routes.dashboard);

// Check If Logged In
function isLoggedIn(req,res,next){
    if (req.isAuthenticated()){
      return next();
    } else {
      res.redirect('/login');
    }
};

Answer 1

You shouldn't use app.use('/', ...), because that will match any URL starting with a /.

Instead, use app.all:

app.all('/', function(req,res){
  res.redirect('/!/dashboard');
});
app.use('/login', routes.login);
app.use('/!/dashboard', isLoggedIn, routes.dashboard);

Answer 2

Classical error would stand in your configuration of Apache/Nginx. In your code, you seem to be using port 80, which I believe you are not using and therefore you would be proxying your requests through Apache or Nginx.

(can't comment so even though this is a poor answer, I will update it accordingly on further comments)