How to deny access to a server or its room to a specific socket.io client?

Question

Node.js

I caught socket.id, but it is always different, it can only be used to prohibit a one-time entry, but how to prohibit entry forever?

Answer 1

Here is the answer, here we get the ip on the client and pass it to the server:

$.getJSON('https://api.ipify.org?format=json', function(data){ 
  	socket.emit('banned',data.ip); 
});

On the server we accept and filter:

socket.on('banned', function(data) {
   		var ban = 'user.ip';
   		if(data == ban) {
   			io.emit('ban', 'Вы забанены!');
   			socket.disconnect(true);
   		}
   	});

Answer 2

First you need to understand - how to determine the client that he is the one who should be banned. And only then at the moment of definition and prohibit.