IETF Logo Mail Archive

Re: [Technical Errata Reported] RFC9110 (9162)

Sean McArthur <sean@seanmonstar.com> Thu, 03 September 2026 14:32 UTC

Received: by mail2.ietf.org (Postfix) id 4201C134CF3EF; Thu, 3 Sep 2026 07:32:22 -0700 (PDT)
Delivered-To: ietfarch-httpbisa-archive-bis2juki@mail2.ietf.org
Received: from localhost (localhost [127.0.0.1]) by mail2.ietf.org (Postfix) with ESMTP id 3DFA5134CF3EE for <ietfarch-httpbisa-archive-bis2Juki@mail2.ietf.org>; Thu, 3 Sep 2026 07:32:22 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ietf.org; s=ietf1; t=1788445942; bh=/wg1q2ISYTnCDKzpSxWTy4fHK0AH1Q/kPwVE0x4oy90=; h=Resent-Date:References:In-Reply-To:From:Date:To:Cc:Subject: Resent-From:Resent-Sender:List-Id:List-Help:List-Post: List-Unsubscribe; b=sy7wBvyOK604zYYw53cE0kZdLYjFMQ1NqnVXo+XUSuaN1WvrLQZfurN4DzYrkV6d7 MpbF94V7Z7gfdgz9msByNWfztxQW+ROfM7n08t5V7Kl5uyiUk2kEnYZQKYiJi4LfOD KWjylEqEZJxWFu9H/RFhVTume872wbCBlRBhm0lE=
X-Virus-Scanned: amavisd-new at ietf.org
X-Spam-Flag: NO
X-Spam-Score: -5.299
X-Spam-Level:
X-Spam-Status: No, score=-5.299 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=0.001, HTML_MESSAGE=0.001, MAILING_LIST_MULTI=-1, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: mail2.ietf.org (amavisd-new); dkim=pass (2048-bit key) header.d=w3.org header.b="FEu/Xj00"; dkim=pass (2048-bit key) header.d=w3.org header.b="HcbbyQIb"; dkim=pass (2048-bit key) header.d=seanmonstar-com.20251104.gappssmtp.com header.b="eSt1t4vz"
Received: from mail2.ietf.org ([166.84.6.31]) by localhost (mail2.ietf.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id MVtHek-YTR4o for <ietfarch-httpbisa-archive-bis2Juki@mail2.ietf.org>; Thu, 3 Sep 2026 07:32:21 -0700 (PDT)
Received: from mab.w3.org (mab.w3.org [IPv6:2600:1f18:7d7a:2700:d091:4b25:8566:8113]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature ECDSA (P-256) server-digest SHA256) (No client certificate requested) by mail2.ietf.org (Postfix) with ESMTPS id 6E68C134CF3E7 for <httpbisa-archive-bis2Juki@ietf.org>; Thu, 3 Sep 2026 07:32:21 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=w3.org; s=s1; h=Subject:Content-Type:Cc:To:Message-ID:Date:From:In-Reply-To: References:MIME-Version:Reply-To; bh=/wg1q2ISYTnCDKzpSxWTy4fHK0AH1Q/kPwVE0x4oy90=; b=FEu/Xj00ZmSbDYednHTy2BOIdr 9L2gvq23254XfryQumTM+Bc4ObPYSqpaM3bWlD7K0ZWCWIRO5Z0psq0OqAJwEWVgj0bTtQxqbskzN LbdWMOJTg+rX4Bw9UTJflIK3d/L0IvBIPoxkK8CbYkWQUNJtGTdbDEQSU/9XyjTE8AtAunzF53I80 ggch7bX2l+vkQ6+pBht69xH/iKWqvoEZhqgpczv+mlyOz9gV9xhyO//zJ9I6sKSp0ri8KJv1RRcKV ubWsh1jQPSTNggG5KjXUWA/2IanFxb7L/4kFzFPE+YMtneO9NIi/oXzBSdgG+t3Pr491MZtFwZqEW Q0KI7gOQ==;
Received: from lists by mab.w3.org with local (Exim 4.98.2) (envelope-from <ietf-http-wg-request@listhub.w3.org>) id 1x28TQ-00000006mmM-34z4 for ietf-http-wg-dist@listhub.w3.org; Thu, 03 Sep 2026 14:31:28 +0000
Resent-Date: Thu, 03 Sep 2026 14:31:28 +0000
Resent-Message-Id: <E1x28TQ-00000006mmM-34z4@mab.w3.org>
Received: from ip-10-0-0-144.ec2.internal ([10.0.0.144] helo=pan.w3.org) by mab.w3.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from <sean@seanmonstar.com>) id 1x28TN-00000006mlH-1yrF for ietf-http-wg@listhub.w3.internal; Thu, 03 Sep 2026 14:31:25 +0000
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=w3.org; s=s1; h=Content-Type:Cc:To:Subject:Message-ID:Date:From:In-Reply-To: References:MIME-Version:Reply-To; bh=/wg1q2ISYTnCDKzpSxWTy4fHK0AH1Q/kPwVE0x4oy90=; t=1788445885; x=1789309885; b=HcbbyQIbrWWQaEuC7ryAESk3BwKWDFuQtQKHQi/GhQUxKrRreMUDoRhgW3cDeLRWB8JMQttROuH kaC0sefx5dc6WZmD4vOa6UPkbtZEyNV3xCwy+CJcCY+7ljzjmnHgmfBOQrGcDJAuVtFStg9NcpH00 vU6XkIlOUKk3yyqf+qiMdHAptZEi0XKQYeXe+tfu60QuzvhfYQZIYV0bDMBxCljazP3wTD1J7QNbr TSUc8Vpc9/93CXogmZNLafZKlq1dZqTTZKaox+yvbLtIjYnqBqLcqUZvTKoiLUC+eOCjbI3maZmi6 sHAVNS0WS3R+E47/oMKJIpOm2+InXXkS3Leg==;
Received: from mail-lf1-x12d.google.com ([2a00:1450:4864:20::12d]) by pan.w3.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.98.2) (envelope-from <sean@seanmonstar.com>) id 1x28TL-000000098oP-0oB9 for ietf-http-wg@w3.org; Thu, 03 Sep 2026 14:31:25 +0000
Received: by mail-lf1-x12d.google.com with SMTP id 2adb3069b0e04-5b568dae0e8so2381123e87.0 for <ietf-http-wg@w3.org>; Thu, 03 Sep 2026 07:31:22 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=seanmonstar-com.20251104.gappssmtp.com; s=20251104; t=1788445878; x=1789050678; darn=w3.org; h=content-type:cc:to:subject:message-id:date:from:in-reply-to :references:mime-version:from:to:cc:subject:date:message-id:reply-to :content-type; bh=/wg1q2ISYTnCDKzpSxWTy4fHK0AH1Q/kPwVE0x4oy90=; b=eSt1t4vzLEaj0BsyZtOsSPoCdkt0kYpkrkPlhBNcwjZpSfBzmprxYYwoAQY53gZo07 0YnW78xWm40avUeNoDWeasUct1nKfrPtUVRpEripOPiHk1DrdlDkfB4ocNQ4OXc46FDn qWuNFLvKBjYtlQIgKsqeONqiROCOMKr7m1nzbwXlW4m+ifnJRnuo4gq466J/qanZAJdR Jy0lDhopTUXiu71wuE1pBV/ORENfqHrF/nYVXiplpCpfEG/jK8xb0Vahuqqpk1xjcv+T j9fAbMyHklO6SJNcXjjTucpLTgwmZVUCTLbU2A/8kKDPlqe/CIvtKpWQHZyy8vT7M7dn lzZA==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788445878; x=1789050678; h=content-type:cc:to:subject:message-id:date:from:in-reply-to :references:mime-version:x-gm-gg:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to:content-type; bh=/wg1q2ISYTnCDKzpSxWTy4fHK0AH1Q/kPwVE0x4oy90=; b=rCejCFiRSe31IW/R5IGdLjisq2tBlkSdwYElRdtZxDejW7lgnY2JrfE7evYerTDKjn A+CG2d6LSr70mVjlzu2wUOB32DIrtr0STTivCI40/ZGgYIrlhfKvg7fHPB5mSQw4e5/j +NK+kgPHydBPznryfvy2G1rwJdQzXv6knkDydmYMX9kAM8glv2wUE9jdxx8D6BfKnrzF veUJtcwDayYQq/lkzWk/m+s3ftfm6P5TT/A8n9S8ont3rENwduxpVqKtLXa9YlwP8r2R i7+ebRTrqhOKS3KycP8m3W6glLtnjtrAWIqmEQfxQMTTtY7GJR0NhC0DVmFQwO2jQdhK 3Yxg==
X-Forwarded-Encrypted: i=1; AKwUvBwSZspJjpx7/cNwTlZBKkz8kc614p7SAQ5vb42UOa17kgxpT96UTh6dN8pKQsan/k2qWfy+TWVWvcQ/iZ4=@w3.org
X-Gm-Message-State: AFuF++nsenQp4PrM6HSzSmbLPSeQJif/g+HIJ2L91qpiFNCDl8W18efX Kt/NglGZ+d1DxBs7CZdNWz8743uBR/whtCy34RHpaQUFYVoyKjGIVFKEXRmCzQTUNJb3mlej2r1 dl1bgkAc=
X-Gm-Gg: AYBFou0Quq8KpNM/uMo0T5RaWavO0KYnRS9zyEKQEfctcyutmWPdhTpLezBVaoq6sQm Bke6Z7GoqsVuWUsWwbSqAK5rc+5nz6DRiKokqH4zwDwJFzmhCfAJseaXKZZSsD9cQueicbRTOvi IVI3JVFtPiwtbhPRXT+U0BHOB9DAz4IPcjG334apQK9SEZ4lK/ZYuX//iznJ37APT6vZ2cPoj3A 9Xtb3KrFe7CJsBPNz1h/YwRKPuir6srxG1qcw6U8mf2nCmxLXufsXj/3nFX6GB4fB8ON/wgqXW2 7zz+c5Ih9peIRJ76L2FSF9LTUT4+WsiZuY49nyEBCi12xm0bxqVOfC9XCqtAPDv/6QHRdS77kaF MSBgQQDTc7gV9OMHXxmM/uIUwwZc4qlWmHI3klvtDn5H2qMehZnMzfWi05n/odEidZzR8+/pqgL r006sR93gitbIEjh1CQVvQzNnFUx5FGXGtgs2ABIwH/tZR5dCHe6WVQkrdYwsj6O2wME5/r318h Fy0ybjpVUYptCK/LKmQUQZqZ9D1XDvkJC7atPM=
X-Received: by 2002:a05:6512:b83:b0:5ae:c8da:6254 with SMTP id 2adb3069b0e04-5b61558fc7bmr245762e87.22.1788445878164; Thu, 03 Sep 2026 07:31:18 -0700 (PDT)
Received: from mail-oo1-f46.google.com (mail-oo1-f46.google.com. [209.85.161.46]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-5b606b9461csm1387487e87.49.2026.09.03.07.31.16 for <ietf-http-wg@w3.org> (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 03 Sep 2026 07:31:17 -0700 (PDT)
Received: by mail-oo1-f46.google.com with SMTP id 006d021491bc7-6b145a9623fso951837eaf.3 for <ietf-http-wg@w3.org>; Thu, 03 Sep 2026 07:31:16 -0700 (PDT)
X-Forwarded-Encrypted: i=1; AKwUvBw5sWuohmH7fzTzTTDOJIKrsh6st3XKa5hInsyaB65WZAK3FDFIHI3jrPiDbXPruS8bpw7KiuWu0F9tMkY=@w3.org
X-Received: by 2002:a05:6820:81f:b0:6b1:c841:f8e1 with SMTP id 006d021491bc7-6b47f821075mr9484930eaf.14.1788445874871; Thu, 03 Sep 2026 07:31:14 -0700 (PDT)
MIME-Version: 1.0
References: <178837554363.11.18169377136741165808@rfc-editor.org> <2651b979-429e-4538-9663-ceee11023b6c@gmx.de> <A3F7AAEC-1274-43B6-A08C-3EFFDE3EDA63@gbiv.com> <D2DA267E-A6D5-45A7-A75B-5472872AB90F@gbiv.com> <CAEmMwDyc=N_ZV4nKs+o8Cqu-Ojdqo2jgtJt20zyccDnz-H0sYQ@mail.gmail.com> <5e6c1c80-f2a8-4a66-ac69-e76f615f7ed9@gmx.de> <apmCzW3dzk8pFQ8d@ubby>
In-Reply-To: <apmCzW3dzk8pFQ8d@ubby>
From: Sean McArthur <sean@seanmonstar.com>
Date: Thu, 03 Sep 2026 10:30:54 -0400
X-Gmail-Original-Message-ID: <CAHrH6bNQpGRD7d88Pq+80=sUFoPrzQGUuzV_snmKWzpWKNp1cw@mail.gmail.com>
X-Gm-Features: AcwNN1XC_iwD0CNv3MgrvzTK64MdVGFPmuu_XRD-186Z6_kyOcebRBGrqopeF5A
Message-ID: <CAHrH6bNQpGRD7d88Pq+80=sUFoPrzQGUuzV_snmKWzpWKNp1cw@mail.gmail.com>
To: Nico Williams <nico@cryptonector.com>
Cc: Julian Reschke <julian.reschke@gmx.de>, ietf-http-wg@w3.org
Content-Type: multipart/alternative; boundary="000000000000127324065a950161"
X-W3C-Hub-DKIM-Status: validation passed: (address=sean@seanmonstar.com domain=seanmonstar-com.20251104.gappssmtp.com), signature is good
X-W3C-Hub-Spam-Status: No, score=-3.9
X-W3C-Hub-Spam-Report: BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DMARC_MISSING=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, W3C_AA=-1, W3C_WL=-1
X-W3C-Scan-Sig: pan.w3.org 1x28TL-000000098oP-0oB9 b6b885185dbbee755633aa519bf73b0a
X-Original-To: ietf-http-wg@w3.org
Subject: Re: [Technical Errata Reported] RFC9110 (9162)
Archived-At: <https://www.w3.org/mid/CAHrH6bNQpGRD7d88Pq+80=sUFoPrzQGUuzV_snmKWzpWKNp1cw@mail.gmail.com>
Resent-From: ietf-http-wg@w3.org
X-Mailing-List: <ietf-http-wg@w3.org> archive/latest/54190
X-Loop: ietf-http-wg@w3.org
Resent-Sender: ietf-http-wg-request@w3.org
Precedence: list
List-Id: <ietf-http-wg.w3.org>
List-Help: <https://www.w3.org/email/>
List-Post: <mailto:ietf-http-wg@w3.org>
List-Unsubscribe: <mailto:ietf-http-wg-request@w3.org?subject=unsubscribe>

Unfortunately, some header implementations decided OWS is not actually
allowed. The `Access-Control-Request-Headers` is one of them, and they even
have a note about it "for better or worse".
https://fetch.spec.whatwg.org/#cors-preflight-fetch

On Thu, Sep 3, 2026 at 10:24 AM Nico Williams <nico@cryptonector.com> wrote:

> On Thu, Sep 03, 2026 at 12:29:06PM +0200, Julian Reschke wrote:
> > Am 03.09.2026 um 11:31 schrieb Rory Hewitt:
> > > I would prefer the definition to say "...separated by a comma, with
> > > optional white space (OWS)" - does optional mean it shouldn't be
> > > mentioned?
> >
> > That would make the behavior non-deterministic.
>
> Isn't it already so?
>
>

v2.46.0 | Report a Bug | By Email | System Status