Use specific middleware in Express for all paths except a specific one

Question

I am using the Express framework in node.js with some middleware functions:

var app = express.createServer(options); app.use(User.checkUser); 

I can use the .use function with an additional parameter to use this middleware only on specific paths:

app.use('/userdata', User.checkUser); 

Is it possible to use the path variable so that the middleware is used for all paths except a specific one, i.e. the root path?

I am thinking about something like this:

app.use('!/', User.checkUser); 

So User.checkUser is always called except for the root path.

Answer 1

I would add checkUser middleware to all my paths, except homepage.

app.get('/', routes.index); app.get('/account', checkUser, routes.account); 

or

app.all('*', checkUser);      function checkUser(req, res, next) {   if ( req.path == '/') return next();    //authenticate user   next(); } 

You could extend this to search for the req.path in an array of non-authenticated paths:

function checkUser(req, res, next) {   const nonSecurePaths = ['/', '/about', '/contact'];   if (nonSecurePaths.includes(req.path)) return next();    //authenticate user   next(); }