When looping a generator in StreamingResponse() using FastAPI/starlette
https://www.starlette.io/responses/#streamingresponse
how can we tell if the connection was somehow disconnected, so a event could be fired and handled somewhere else?
Scenario: writing an API with text/event-stream, need to know when client closed the connection.
Consider using request.is_disconnected(). From Starlette's docs:
In some cases such as long-polling, or streaming responses you might need to determine if the client has dropped the connection. You can determine this state with disconnected = await request.is_disconnected().
Unfortunately, there seems to be no other documentation regarding this API. Have a look at the MR that introduced this feature: https://github.com/encode/starlette/pull/320