how to use session in loopback using middlewre - loopbackjs

Question

I m new to loopback and don't know how to do following things in loopback
I want to set access token and other value in a session using middleware for that I found this thing in server folder of loopback
"session": {},
in middleware.json but don't know how to use this because there is not much documentation
I want to condition in session middleware like if I has session value then continue else throw to login page
note i already install this npm install express-session

Answer 1

Could you be a little more specific about what you want? but I'll explain a little bit about how authentification sessions are handled, there are two native ways you treat it all; The first one would be using a more raw reading pulling for modeling of your api and the second would be to use the JWT in aligned with accessToken and Passport.JS.
There are two examples available today with Loopback 3.x
loopback-example-user-management
loopback-example-passport
Basically using the raw reading with app.post('/login', function(req, res) then if your client is successfully authenticated you generate a cookie using your client's accessToken, example res.cookie('access_token', token.id, { signed: true , maxAge: 300000 }); res.set('X-Access-Token', token.id); and finally if you want you can transport the generated token to your pages:
res.render('home', {
email: req.body.email,
accessToken: token.id
});
Now with Passport.JS a middleware is used to secure all your connection and authentication:
app.middleware('session:before', cookieParser(app.get('cookieSecret')));
app.middleware('session', session({
secret: 'Seal Playing Saxophone',
saveUninitialized: true,
resave: true,
}));
passportConfigurator.init();
One of the authenticated page rendering pillar is var ensureLoggedIn = require('connect-ensure-login').ensureLoggedIn; you can use this ensureLoggedIn('/login') to free up your routes:
app.get('/auth/account', ensureLoggedIn('/login'), function(req, res, next) {
res.render('pages/loginProfiles', {
user: req.user,
url: req.url,
});
});
Now if you just want to skip this all and already have your environment set up and just want to create a route to get the accessToken of the logged in client use the template below;
app.get('/session-details', function (req, res) {
var AccessToken = app.models.AccessToken;
AccessToken.findForRequest(req, {}, function (aux, accesstoken) {
// console.log(aux, accesstoken);
if (accesstoken == undefined) {
res.status(401);
res.send({
'Error': 'Unauthorized',
'Message': 'You need to be authenticated to access this endpoint'
});
} else {
var UserModel = app.models.user;
UserModel.findById(accesstoken.userId, function (err, user) {
// show current user logged in your console
console.log(user);
// setup http response
res.status(200);
// if you want to check the json in real time in the browser
res.json(user);
});
}
});
});
I hope I have illuminated your ideas :] I am here to answer your questions.