passport-expresshelper

Helper for express 2.x in combination with the with the passport authentication module

dynamicHelper for express 2.x:

var passportexpresshelper = require('passport-expresshelper');

app.configure(function(){
    ...
    app.use(passport.initialize());
    app.use(passport.session());
    ...
    app.dynamicHelpers(passportexpresshelper.dynamicHelpers);
    ...
});

Middleware for express routes

var checkAuth = require('passport-expresshelper').ensureAuthenticated;

app.get('/somethingprivate', checkAuth);

If the user is authenticated through passport, the request will continue to the requested page. Otherwise the requested path will be saved to req.session.redirect and the user will be redirected to /login. If you want to forward the user to a different page, you could add another route like this:

app.get('/login', function(req, res) {
    res.redirect('/auth');
});

After the login, the user can be forwarded to the originally requested page using the saved path in req.session.redirect.