Spring Event source not working with CORS

Do you think the limitation of SockJS EventSource on "same origin" is still relevant?

https://github.com/spring-projects/spring-framework/blob/58e40d1aa2c23f6d9c41d4289f5b5debc10868f6/spring-websocket/src/main/java/org/springframework/web/socket/sockjs/transport/TransportType.java#L45

I have the feeling this is reflecting the old lack of cors in event source specification, but the spec has been improved since : https://www.w3.org/TR/eventsource/

But once again, this is my very first time "playing" with SSE. Another point of view can help before working on any PR.

Comment From: rstoyanchev

Probably a valid point but it goes back to the protocol, see http://sockjs.github.io/sockjs-protocol/sockjs-protocol-0.3.3.html#section-15. Looking at the browser matrix my best guess is that this isn't really important enough to change.

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