Nodejs Express: Sending a different page if logged in - node.js

Question

I'm trying to create a website using expressjs.
I want to send a different page to the user if he's logged in.
I'm able to send the raw html website, but linked files like index.css are not beeing loaded!
app.use(cookieParser());
app.use(expressSession({secret:'somesecrettokenhere', resave: false, saveUninitialized: true}));
app.use(bodyParser());
//app.use(express.static(path.join(__dirname, '../client/login')));
// disable layout
var mainPage = express.static(path.join(__dirname, '../client/main'));
var loginPage = express.static(path.join(__dirname, '../client/login'));
app.get('/', function (req, res, next) {
console.log('getting /');
if (req.session.userName) {
//app.use(express.static(path.join(__dirname, '../client/main')));
console.log("logged in");
mainPage(req, res, next);
}else {
//app.use(express.static(path.join(__dirname, '../client/login')));
console.log("not logged in");
loginPage(req, res, next);
}
});
http.listen(3000, function(){
console.log('listening on *:3000');
});
Thanks in advance!

Answer 1

Yes, you can.
You can do response.render(pageName); to render the page where you want to send the user.
app.use(cookieParser());
app.use(expressSession({secret:'somesecrettokenhere', resave: false, saveUninitialized: true}));
app.use(bodyParser());
//app.use(express.static(path.join(__dirname, '../client/login')));
// disable layout
// view engine setup
app.set('views', path.join(__dirname, '../client'));
app.set('view engine', 'jade');
app.get('/', function (req, res, next) {
console.log('getting /');
if (req.session.userName) {
//app.use(express.static(path.join(__dirname, '../client/main')));
console.log("logged in");
res.render("mainPage");
}else {
//app.use(express.static(path.join(__dirname, '../client/login')));
console.log("not logged in");
res.render("loginPage");
}
});
http.listen(3000, function(){
console.log('listening on *:3000');
});
I used jade templating engine, you can use any other

Answer 2

It looks like the code you have is just checking a session for a user name -- I'd highly recommend AGAINST doing this, as it's not a secure way to do authentication.
If you want a secure way to do auth you should look into using a tool like either passportjs or stormpath. Stormpath does a bunch of stuff (api auth, social login, etc) in addition to the normal auth stuff, while passport is a bit more bare-bones.
Here's an example using Stormpath to do what you want:
app.get('/', function(req, res) {
if (req.user) {
res.render('template');
} else {
res.render('anonymousTemplate');
}
});
Full disclosure: I work # Stormpath and am the author of that library -- but it is awesome all the same.