Node js : How can I integrate authorization and authentication to my node application?

Question

In my node application, I have an admin that can make all requests and the normal user that has the right to make only certain requests.

example:

admin cans make:

post on /root, /user, /tools

simple users can make:

post on /users, /tools

If a simple user tries to make a request on /root , he just receives and error message.

How can I handle this is node js? which package, if possible few examples.

thank

Answer 1

A general approach should be define a custom middleware to verify the authentication

function VerifyUser(req, res, next){
 if(user.isAuthenticated){
   return next(); //call the next middleware
 }
 next(err); //call the error middleware 

}

error handler

app.use(function(err, req, res, next) {
    if(!err) return next(); 
    res.status(500).json(new Error('error happened'));
});

and then for each route that needs authentication bind the VerifyUser middleware before the router middleware. Since in express the middleware order is relevant, VerifyUser will be called at first, and if the branch reach the next() call your routing function will be triggered.

Authenticated routes:

router.get('/root', VerifyUser, function(req, res){
 //if you reach this point means the user has been granted the access

})

Non-authenticated routes:

router.get('/tools', function(req, res){

})