AuthController.js

/**
 * AuthController
 *
 * @module    :: Controller
 * @description	:: Contains logic for handling requests.
 */

var passport = require('passport');

module.exports = {

    index: function(req, res) {
        res.json({});
    },

    logout: function(req, res) {
        req.logout();
        res.redirect('/');
    },

    'facebook': function(req, res) {
        passport.authenticate('facebook', {
            failureRedirect: '/auth',
            scope: 'email'
        }, function(err, user) {
            req.logIn(user, function(err) {
                if (err) {
                    console.log(err);
                    res.view('500');
                    return;
                }

                res.redirect('/');
                return;
            });
        })(req, res);
    },

    'facebookcb': function(req, res) {
        console.log('Fired'); // Is logged several times
        passport.authenticate('facebook',
            function(req, res) {
                res.redirect('/');
            })(req, res);
    }

};

bootstrap.js

/**
 * Bootstrap
 *
 * An asynchronous boostrap function that runs before your Sails app gets lifted.
 * This gives you an opportunity to set up your data model, run jobs, or perform some special logic.
 *
 * For more information on bootstrapping your app, check out:
 * http://sailsjs.org/#documentation
 */

var passport = require('passport'),
    FacebookStrategy = require('passport-facebook').Strategy;


var verifyHandler = function(token, tokenSecret, profile, done) {
    process.nextTick(function() {

        User.findOne({
            uid: profile.id
        }).done(function(err, user) {
            if (user) {
                return done(null, user);
            } else {
                User.create({
                    provider: profile.provider,
                    uid: profile.id,
                    name: profile.displayName
                }).done(function(err, user) {
                    return done(err, user);
                });
            }
        });
    });
};

passport.serializeUser(function(user, done) {
    done(null, user.uid);
});

passport.deserializeUser(function(uid, done) {
    User.findOne({
        uid: uid
    }).done(function(err, user) {
        done(err, user)
    });
});

module.exports.express = {
    customMiddleware: function(app) {

        passport.use(new FacebookStrategy({
                clientID: '...',
                clientSecret: '...',
                callbackURL: 'http://localhost:1337/auth/facebookcb'
            },
            verifyHandler
        ));

        app.use(passport.initialize());
        app.use(passport.session());
    }
}

module.exports.bootstrap = function(cb) {
  
    // It's very important to trigger this callack method when you are finished 
    // with the bootstrap!  (otherwise your server will never lift, since it's waiting on the bootstrap)
    cb();
    
};

consolelog

   Sails.js           <|
   v0.9.3              |\
                      /|.\
                     / || \
                   ,'  |'  \
                .-'.-==|/_--'
                `--'-------' 
   __---___--___---___--___---___--___
 ____---___--___---___--___---___--___-__

info: Server lifted in `...`
info: To see your app, visit http://localhost:1337
info: To shut down Sails, press <CTRL> + C at any time.

debug: --------------------------------------------------------
debug: :: Sat Sep 07 2013 17:36:03 GMT-0600 (MDT)
debug: 
debug: Environment  : development
debug: Port		: 1337
debug: --------------------------------------------------------
info: handshake authorized BnoXCoF52kD34XKIyEJn
Fired
Fired
Fired
Fired
Fired
Fired
Fired
Fired
Fired
Fired
info: transport end (socket end)