How To Integrate Sails and Passport

.sails-and-passport.md

#Prerequisites#

• Sails.js (See https://github.com/balderdashy/sails)
• Ember Tools (See https://github.com/rpflorence/ember-tools)
• Twitter Bootstrap (See http://twitter.github.io/bootstrap/index.html)
• Passport.js (See http://passportjs.org)
  • npm install passport
  • npm install passport-local
    (Probably could express this as package.json)

#Steps#

1. Create a new Sails application via sails new <appName>.
2. Change your working directory to the root directory of the new Sails application via cd <appName>.
3. Merge application.js with config/application.js.
4. Merge policies.js with config/policies.js.
5. Merge routes.js with config/routes.js.
6. Merge authenticated.js with api/policies/authenticated.js.
7. Create api/controllers/AuthController.js.
8. If you are using a traditional, server-generated UI, then create views/auth/login.ejs

application.js

var passport = require('passport'),
	LocalStrategy = require('passport-local').Strategy;

// some static users
var users = [{
	id: 1,
	username: 'bob',
	password: 'secret',
	email: '[email protected]'
}, {
	id: 2,
	username: 'joe',
	password: 'birthday',
	email: '[email protected]'
}];

// helper functions


function findById(id, fn) {
	var idx = id - 1;
	if (users[idx]) {
		fn(null, users[idx]);
	} else {
		fn(new Error('User ' + id + ' does not exist'));
	}
}

function findByUsername(username, fn) {
	for (var i = 0, len = users.length; i < len; i++) {
		var user = users[i];
		if (user.username === username) {
			return fn(null, user);
		}
	}
	return fn(null, null);
}


// Passport session setup.
// To support persistent login sessions, Passport needs to be able to
// serialize users into and deserialize users out of the session. Typically,
// this will be as simple as storing the user ID when serializing, and finding
// the user by ID when deserializing.
passport.serializeUser(function(user, done) {
	done(null, user.id);
});

passport.deserializeUser(function(id, done) {
	findById(id, function(err, user) {
		done(err, user);
	});
});


// Use the LocalStrategy within Passport.
// Strategies in passport require a `verify` function, which accept
// credentials (in this case, a username and password), and invoke a callback
// with a user object. In the real world, this would query a database;
// however, in this example we are using a baked-in set of users.
passport.use(new LocalStrategy(

function(username, password, done) {
	// asynchronous verification, for effect...
	process.nextTick(function() {

		// Find the user by username. If there is no user with the given
		// username, or the password is not correct, set the user to `false` to
		// indicate failure and set a flash message. Otherwise, return the
		// authenticated `user`.
		findByUsername(username, function(err, user) {
			if (err) {
				return done(err);
			}
			if (!user) {
				return done(null, false, {
					message: 'Unknown user ' + username
				});
			}
			if (user.password != password) {
				return done(null, false, {
					message: 'Invalid password'
				});
			}
			return done(null, user);
		});
	});
}));

module.exports = {

	// SNIP ...

	// Custom express middleware - we use this to register the passport middleware
	express: {
		customMiddleware: function(app) {
			app.use(passport.initialize());
			app.use(passport.session());
		}
	}

};

AuthController.js

/*jshint node:true */

/*---------------------
	:: Auth
	-> controller
---------------------*/
var passport = require('passport');

var AuthController = {

	login: function(req, res) {
		res.view();
	},

	process: function(req, res) {
		passport.authenticate('local', function(err, user, info) {
			if ((err) || (!user)) {
				res.redirect('/login');
				return;
			}

			req.logIn(user, function(err) {
				if (err) {
					res.view();
					return;
				}

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

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

};
module.exports = AuthController;

authenticated.js

// We use passport to determine if we're authenticated
module.exports = function(req, res, next) {

	'use strict';

	// Sockets
	if(req.isSocket)
	{
		if(req.session &&
		req.session.passport &&
		req.session.passport.user)
		{
			return next();
		}

		res.json(401);
	}
	// HTTP
	else
	{
		if(req.isAuthenticated())
		{
			return next();
		}
		
                // If you are using a traditional, server-generated UI then uncomment out this code:
                /*
                res.redirect('/login');
                */

                // If you are using a single-page client-side architecture and will login via socket or Ajax, then uncomment out this code:
                /*
                res.status(401);
                res.end();
                */
	}

};

login.ejs.html

<form action="/login" method="post">
    <div>
        <label>Username:</label>
        <input type="text" name="username"/>
    </div>
    <div>
        <label>Password:</label>
        <input type="password" name="password"/>
    </div>
    <div>
        <input type="submit" value="Submit"/>
    </div>
</form>
<p><small>Hint - bob:secret</small></p>

policies.js

module.exports.policies = {
	// default require authentication
	// see api/policies/authenticated.js
	'*': 'authenticated',

        // whitelist the home controller, so the client-side app can be sent down
        // If you are using a single-page client-side architecture, then uncomment out this code:
        /*
	'home': {
		'*': true
	},
        */

	// whitelist the auth controller
	'auth': {
		'*': true
	}
};

routes.js

module.exports.routes = {

	// SNIP ...

	// Custom routes for login:
	'get /login': {
		controller: 'auth',
		action: 'login'
	},

	'post /login': {
		controller: 'auth',
		action: 'process'
	}

	// SNIP ...
};

Is the req.logIn function at AuthController.js@22 documented anywhere? I can't find it for the life of me.

It is part of Passport JS documentation, see passportjs.org/Login