[quicwg/base-drafts] Rejecting duplicated push streams requirement is unenforceable (#4828)

Guoye Zhang <notifications@github.com> Wed, 17 February 2021 01:18 UTC

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Date: Tue, 16 Feb 2021 17:18:26 -0800
From: Guoye Zhang <notifications@github.com>
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Subject: [quicwg/base-drafts] Rejecting duplicated push streams requirement is unenforceable (#4828)
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> Each Push ID MUST only be used once in a push stream header. If a push stream header includes a Push ID that was used in another push stream header, the client MUST treat this as a connection error of type H3_ID_ERROR

For clients that have sent CANCEL_PUSH, they don't know if server's push stream will still arrive or not. They have to remember Push IDs forever in order to differentiate between cancelled push and completed push.

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