Decide whether a request must be answered with a long-lived text/event-stream
notification stream rather than the ordinary one-shot JSON response
(draft basic/transports / basic/utilities/subscriptions). Only the draft
subscriptions/listen request takes this path: "The server's response is
itself an SSE stream that stays open and delivers the change notifications."
Pre-draft versions never defined subscriptions/listen, so they answer
normally.
Decide whether a request must be answered with a long-lived text/event-stream notification stream rather than the ordinary one-shot JSON response (draft basic/transports / basic/utilities/subscriptions). Only the draft subscriptions/listen request takes this path: "The server's response is itself an SSE stream that stays open and delivers the change notifications." Pre-draft versions never defined subscriptions/listen, so they answer normally.