[quicwg/base-drafts] DUPLICATE_PUSH instead of multiple PUSH_PROMISE frames (#2072)

Mike Bishop <notifications@github.com> Thu, 29 November 2018 21:58 UTC

Return-Path: <noreply@github.com>
X-Original-To: quic-issues@ietfa.amsl.com
Delivered-To: quic-issues@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 66D751276D0 for <quic-issues@ietfa.amsl.com>; Thu, 29 Nov 2018 13:58:10 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -9.46
X-Spam-Level:
X-Spam-Status: No, score=-9.46 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.46, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, MAILING_LIST_MULTI=-1, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=github.com
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id eY-0-4kG1Sx2 for <quic-issues@ietfa.amsl.com>; Thu, 29 Nov 2018 13:58:08 -0800 (PST)
Received: from out-3.smtp.github.com (out-3.smtp.github.com [192.30.252.194]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 730B7130EE6 for <quic-issues@ietf.org>; Thu, 29 Nov 2018 13:58:08 -0800 (PST)
Date: Thu, 29 Nov 2018 13:58:07 -0800
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=github.com; s=pf2014; t=1543528687; bh=KFrQc1oDwYAsvU8LI/80FWe6ybhqqbsWkXX/+TKGmUE=; h=Date:From:Reply-To:To:Cc:Subject:List-ID:List-Archive:List-Post: List-Unsubscribe:From; b=F+/YpGXJCCBO3TJ7pxdV/aVxwqEjpEQv/4ceN+OzVw7yMM6IC/k82Qm9WxbSud/9H WjRmWEeyZUeT1JM72gPc3pcrsktXUCzjfdCcTAt6D5dVyfm3KmVISUzNEPK/Knttdd 86sUEf11hldpda4EBcnwOMItFNP8HTy5zEKXlyhA=
From: Mike Bishop <notifications@github.com>
Reply-To: quicwg/base-drafts <reply+0166e4ab653db48799101620b3c941edadbd3e27ee3e49bb92cf00000001181822ef92a169ce170109b9@reply.github.com>
To: quicwg/base-drafts <base-drafts@noreply.github.com>
Cc: Subscribed <subscribed@noreply.github.com>
Message-ID: <quicwg/base-drafts/pull/2072@github.com>
Subject: [quicwg/base-drafts] DUPLICATE_PUSH instead of multiple PUSH_PROMISE frames (#2072)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="--==_mimepart_5c0060ef6ebcb_3df93f94316d45c024551"; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Precedence: list
X-GitHub-Sender: MikeBishop
X-GitHub-Recipient: quic-issues
X-GitHub-Reason: subscribed
X-Auto-Response-Suppress: All
X-GitHub-Recipient-Address: quic-issues@ietf.org
Archived-At: <https://mailarchive.ietf.org/arch/msg/quic-issues/ELIYo7bAxnuZJvi-H-7-oVl82D8>
X-BeenThere: quic-issues@ietf.org
X-Mailman-Version: 2.1.29
List-Id: Notification list for GitHub issues related to the QUIC WG <quic-issues.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/quic-issues>, <mailto:quic-issues-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/quic-issues/>
List-Post: <mailto:quic-issues@ietf.org>
List-Help: <mailto:quic-issues-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/quic-issues>, <mailto:quic-issues-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 29 Nov 2018 21:58:11 -0000

Fixes #1864, by only sending the request headers once and having a separate frame to pick them up by reference.  Also fixes #1959 along the way, as an added bonus.

However, this is not an unmitigated improvement.  The point of the ordering requirement for PUSH_PROMISE frames is that the client knows that a push is coming before they see references to a dependent resource and initiate their own requests.  If reordering (or blocking QPACK references) places a DUPLICATE_PUSH ahead of the corresponding PUSH_PROMISE, knowing that the resource is on the way can no longer be guaranteed.
You can view, comment on, or merge this pull request online at:

  https://github.com/quicwg/base-drafts/pull/2072

-- Commit Summary --

  * DUPLICATE_PUSH

-- File Changes --

    M draft-ietf-quic-http.md (104)

-- Patch Links --

https://github.com/quicwg/base-drafts/pull/2072.patch
https://github.com/quicwg/base-drafts/pull/2072.diff

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/quicwg/base-drafts/pull/2072