The newly released Ring 1.11 has standardized websocket APIs for its application: https://github.com/ring-clojure/ring/blob/master/SPEC.md#3-websockets. So I think it is also possible to make sente standardized by adoption of the websocket api.

My https://github.com/sunng87/ring-jetty9-adapter has an implementation of Ring 1.11 for both http and websocket. If we can build sente fully on Ring 1.11, theoretically it should be able to run on any webserver that is compatible.

This also expires #424, we don't need to build an implementation for rj9a specifically any more.