[quicwg/base-drafts] How should an HQ server respond to RST_STREAM? (#1596)

afrind <notifications@github.com> Mon, 23 July 2018 17:10 UTC

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Subject: [quicwg/base-drafts] How should an HQ server respond to RST_STREAM? (#1596)
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If a client sends a RST_STREAM with code HTTP_REQUEST_CANCELLED, the server also needs to reset its end of the stream.  As I read the spec, I'm unsure what error code best suits this purpose.

1. STOPPING says it is reserved by the transport in response to STOP_SENDING, so that's not it.
2. HTTP_REQUEST_CANCELLED is allowed S->C, but only if no processing of the request has occurred.  What if part of the request has been processed? 

A corollary question is, if a server cancels a request with a reset_stream, and does not send a STOP_SENDING, is the client expected to reply with HTTP_REQUEST_CANCELLED, a different error code, or continue sending until told to stop?  CANCELLED seems ok here, but I dislike the asymmetry.

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