how to redirect to original page after successful authentication using passport-google-oauth

Question

I am using node passport-google-oauth module and trying to redirect the page back to the original path after successful authentication using a session based approached sugge

Answer 1

Can also store the first URL in the session, only if the variable is currently not set. Then post login if this var is set, then re direct to that.

This is better than a header which might not be accurate from a 3rd party oauth.

In Java I would do it in a filter (check for a session variable to, say redirect_to or first_url, if its null then set it, if not the login/ sign up page). In node js can use middleware as explained in https://stackoverflow.com/a/13336055/1643558

Quoting that answer: I have a middleware I use with app.get('/account', auth.restrict, routes.account) that sets redirect_to in the session...then I redirect to /login

auth.restrict = function(req, res, next){
    if ( !req.session.userid ) {
        req.session.redirect_to = '/account';
            res.redirect('/login');
    } else {
        next();
    }
};

Then in routes.login.post I do the following:

var redirect_to = req.session.redirect_to ? req.session.redirect_to : '/';
delete req.session.redirect_to;
//is authenticated ?
res.redirect(redirect_to);