Nodejs Ajax - redirect to the login page

Question

I'm trying to solve this problem. I use Node Express and jQuery. The user has been logged out (from another page of the site), but is trying to send an ajax request. How to redirect it to the login page? I can throw an error like so:

if (!req.isAuthenticated()) {
    return res.json(function() {});
}

and after on the client side:

$.ajax({
    type: 'GET',
    ...
    error: function() {
        document.location.href = '/logout';
    }
})

But can it be done in some other way? For example, if you do not use Ajax, then I do this:

if (!req.isAuthenticated()) {
    return redirect('/login');
}

Something similar but with Ajax?

Answer 1

Since you mentioned you use Express, you can call the redirect function on the response:

if (!req.isAuthenticated()) {
    res.redirect("/login");
}