If you need to listen for the progress only, try server-sent events, maybe?: https://en.wikipedia.org/wiki/Server-sent_events https://en.wikipedia.org/wiki/Serv

If you need to listen for the progress only, try server-sent events, maybe?: https://en.wikipedia.org/wiki/Server-sent_events https://en.wikipedia.org/wiki/Server-sent_events It's dead simple: an existence of the URI means the topic/channel/whathaveu exists, to access it one needs to know the URI, data streamed but no access to old data, multiple consumers no problem.