Connecting React Client to Net SocketIO Backend results in 404 error about netty-socketio

[shutuper]

Your filter is applied only for Spring web server, but netty-socket.io starts separate netty server and uses another port which you can specify in com.corundumstudio.socketio.Configuration, it also contains getter/setter methods for allowed origin and headers

[myselfuser1]

@shutuper Thanks for the reply. I updated the code to

@Configuration
public class SocketIOConfig {


    @Bean
    public SocketIOServer socketIOServer() {
        com.corundumstudio.socketio.Configuration config = new com.corundumstudio.socketio.Configuration();
        config.setPort(8081);
        config.setOrigin("*"); // Allow requests from all origins
        return new SocketIOServer(config);
    }
}

But still i get cors issue, I am accessing http://localhost:8081 from frontend side