Redirect user to previous page after authentication

Question

I'm using Google auth through Passport in my app and I'm attempting to redirect the user back to the original page they requested after successful sign-in. I think that location.reload() may be the problem, but not sure how to solve it.

routes.js:

router.post('/auth/google/return', passport.authenticate('google'), function(req, res) {
  res.redirect(req.session.returnTo);
  req.session.returnTo = null;
});

middleware.js:

var isAuth = function(req, res, next) {
  if (req.isAuthenticated()) {
    return next();
  } else {
    req.session.returnTo = req.url;
    return res.redirect('/');
  }
};

called on button click:

$.post('/auth/google/return', {code: authResult.code, access_token: authResult.access_token}).done(function(data) {
    location.reload();
});

Answer 1

Try:

router.post('/auth/google/return', passport.authenticate('google'), function(req, res) {
   var backURL = req.header('Referer') || '/';
   res.json({redir: backURL});
});

And:

$.post('/auth/google/return', {code: authResult.code, access_token: authResult.access_token}).done(function(data) {
    window.location.href = data.redir;
});