can i connect client server(localhost:8082) and websocket(localhost:8080)? - websocket

Question

My problem is I need to connect different port or server!
websocket server(localhost:8080) client server(localhost:random)
(failed: Error during WebSocket handshake: Unexpected response code: 403)
why?? I'm tired...
I already tried same port and I can success!
I can connect client(localhost:8080) and websocekt(localhost:8080).
I want to use websocket using (server side: java sts, tomcat 8.0).
questions
1. websocket can connect only same server and port???!!!!(no! please!)
2. If I can... what's the problem :(? Do u have any example?

Answer 1

import org.springframework.web.socket.config.annotation.EnableWebSocket;
import org.springframework.web.socket.config.annotation.WebSocketConfigurer;
import org.springframework.web.socket.config.annotation.WebSocketHandlerRegistry;
#Configuration
#EnableWebSocket
public class WebSocketConfig implements WebSocketConfigurer {
#Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
registry.addHandler(myHandler(), "/myHandler").setAllowedOrigins("*");
}
#Bean
public WebSocketHandler myHandler() {
return new MyHandler();
}
}

Answer 2

Sounds like this is related to CORS https://en.wikipedia.org/wiki/Cross-origin_resource_sharing.
I assume you are using spring websocket as you didn't mention.
You will need to disable same origin policy in your websocket config class as below example,
#Configuration
public class WebSocketSecurityConfig extends AbstractSecurityWebSocketMessageBrokerConfigurer {
#Override
protected void configureInbound(MessageSecurityMetadataSourceRegistry messages) {
}
#Override
protected boolean sameOriginDisabled() {
//disable CSRF for websockets
return true;
}