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Design: Adding ASSOCIATED_ONLY

James M Snell <jasnell@gmail.com> Wed, 19 June 2013 17:58 UTC

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From: James M Snell <jasnell@gmail.com>
Date: Wed, 19 Jun 2013 10:56:48 -0700
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Subject: Design: Adding ASSOCIATED_ONLY
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https://github.com/http2/http2-spec/pull/144

This was a technical change brought up and discussed as part of the
"layering taskforce" breakout but was never discussed in the larger
interim discussions.

Essentially, this PR would add an "ASSOCIATED_ONLY" flag to PRIORITY
and RST_STREAM frames that would allow terminating and reprioritizing
promised streams as a group.

Sending PRIORITY(ASSOCIATED_ONLY) would ONLY set the priority for
associated streams, not the referenced stream.

Sending RST_STREAM(ASSOCIATED_ONLY) would terminate ONLY the
associated streams, not the referenced stream.

Without this, we would have to send PRIORITY and RST_STREAM for each
individual associated stream, which is obviously quite inefficient.

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