Should "http.disconnect" be sent once or repeatedly?

[adriangb]

Prompted by encode/starlette#1706 (comment)

The spec currently says:

Sent to the application when a HTTP connection is closed or if receive is called after a response has been sent.

After reading this multiple times it sounds to me like it is saying that if the HTTP connection is closed the message might only be sent once but in the case "receive is called after the response was sent" it would be delivered multiple times (otherwise it should say "the first time receive is called after a response has been sent).

Uvicorn seems to always send the message multiple times, but it's unclear if that's part of the spec or just an implementation detail.

Could we clarify the spec to:

Sent to the application if receive is called after a response has been sent or after the HTTP connection has been closed.

I think that makes it clearer that the server will continue to deliver this message multiple times in either scenario.

[andrewgodwin]

Totally agreed here - I've accepted the PR in. Thanks for bringing it up!