CODEWITHSUNDEEP
node.jsexpress
Avery235
Avery235

Reputation: 5306

Express middleware `router.use` vs function

router.use((req, res, next) => { // export as single route in a file
  if (req.isAuthenticated()) {
    next();
    return;
  }
  res.sendStatus(401);
});

const authenticate = (req, res, next) => {
  if (req.isAuthenticated()) {
    next();
    return;
  }
  res.sendStatus(401);
};

The above are 2 ways of writing the authentication route for use in another route (like below). Which way is preferred and why?

router.post('/', authenticate, (req, res, next) => {});

Upvotes: 0

Views: 72

Answers (1)

Geet Choubey
Geet Choubey

Reputation: 1077

The above way will affect all the requests that your ExpressJS app is serving, where as the second approach uses Object oriented scripting way to authenticate only those requests that require authentication.

Say your are writing a sign in or sign up API, you wouldn't need an authentication parameter for that unless mentioned otherwise.

****UPDATE****

The first approach will affect all the requests that your router is serving.

You probably have used the router in your App.js file as

const myRoute = require('./routes/test'); // where `test.js` is a file in routes folder with your code above

app.use('/some_route', myRoute);

All requests going to http://servername:port/some_route/.... will be filtered in your test.js file now.

Upvotes: 1

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