Node.js + Socket.io | Set custom headers on the server

Question

I use Helmet with Express to set quite some security HTTP headers from the server side. This is nicely done, when rendering client pages on top of the node.js app, using:

Answer 1

extraHeaders options will work as below, as you need to remove "transports: ['polling']," in case you are using, and use below pattern. This worked for me, and was able to send custom headers.

package used :- "socket.io-client": "^2.2.0",

this.socket = io(environment.host, {
   path: `/api/backend/socket.io`,
   origins: '*:*',
   // transports: ['polling'],
   transportOptions: {
     polling: {
        extraHeaders: {
           'authorization': token,
           'user-id' : userId
        }
     }
    }
 })

Ref:- https://socket.io/docs/client-api/#With-extraHeaders