Socket.io gives CORS error even if I allowed cors it on server

Question

My node server and client are running on different ports(3001,5347 respectively). On client I had used,

var socket = io(\'http://127.0.0.1:3001\');
         


        

Answer 1

If you are using Express then define a middleware like this before your serve start code...

app.use(function(request, response, next) {
  response.header("Access-Control-Allow-Origin", "*");
  response.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
  next();
});