How to rewrite such a piece of code?

Question

JavaScript

There is a piece of code that is repeated many times in different routes:

var auth = require('..//config/authenticate.js');

myRouter.get('/:query', function(req, res) {
     if (auth.isLogin(req, res)){
          //my code there
     }
})

How can I properly rewrite this so that I don't have to write an if every time?

Answer 1

Apparently, this is express. In this case, make a middleware that will have this check, and do a redirect or return a 401. Something like this:

var auth = require('../config/authenticate.js');
function authMiddleware(req, res, next) {
    if (!auth.isLogin(req, res)) {
        res.redirect('/login'); // или res.status(401).send('Залогиньтесь')
    } else {
        next(); // продолжаем обработку запроса
    }
}

myRouter.use(authMiddleware);

Checking rights is done in much the same way.