Starting to implement Cache-Status

Mark Nottingham <mnot@mnot.net> Thu, 06 August 2020 09:05 UTC

Return-Path: <ietf-http-wg-request+bounce-httpbisa-archive-bis2juki=lists.ie@listhub.w3.org>
X-Original-To: ietfarch-httpbisa-archive-bis2Juki@ietfa.amsl.com
Delivered-To: ietfarch-httpbisa-archive-bis2Juki@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3DE2F3A104A for <ietfarch-httpbisa-archive-bis2Juki@ietfa.amsl.com>; Thu, 6 Aug 2020 02:05:16 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.997
X-Spam-Level:
X-Spam-Status: No, score=-2.997 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=0.001, MAILING_LIST_MULTI=-1, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=mnot.net header.b=oh0EeXt6; dkim=pass (2048-bit key) header.d=messagingengine.com header.b=cGTFnltO
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 GdDwUMhsiMt0 for <ietfarch-httpbisa-archive-bis2Juki@ietfa.amsl.com>; Thu, 6 Aug 2020 02:05:14 -0700 (PDT)
Received: from lyra.w3.org (lyra.w3.org [128.30.52.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id C8D833A0FB7 for <httpbisa-archive-bis2Juki@lists.ietf.org>; Thu, 6 Aug 2020 02:05:14 -0700 (PDT)
Received: from lists by lyra.w3.org with local (Exim 4.92) (envelope-from <ietf-http-wg-request@listhub.w3.org>) id 1k3bn1-00038i-U2 for ietf-http-wg-dist@listhub.w3.org; Thu, 06 Aug 2020 09:02:19 +0000
Resent-Date: Thu, 06 Aug 2020 09:02:19 +0000
Resent-Message-Id: <E1k3bn1-00038i-U2@lyra.w3.org>
Received: from titan.w3.org ([128.30.52.76]) by lyra.w3.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from <mnot@mnot.net>) id 1k3bn0-00037o-C6 for ietf-http-wg@listhub.w3.org; Thu, 06 Aug 2020 09:02:18 +0000
Received: from wout3-smtp.messagingengine.com ([64.147.123.19]) by titan.w3.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from <mnot@mnot.net>) id 1k3bmx-00062K-14 for ietf-http-wg@w3.org; Thu, 06 Aug 2020 09:02:17 +0000
Received: from compute4.internal (compute4.nyi.internal [10.202.2.44]) by mailout.west.internal (Postfix) with ESMTP id 7A827FA0 for <ietf-http-wg@w3.org>; Thu, 6 Aug 2020 05:01:59 -0400 (EDT)
Received: from mailfrontend2 ([10.202.2.163]) by compute4.internal (MEProxy); Thu, 06 Aug 2020 05:01:59 -0400
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mnot.net; h=from :content-type:content-transfer-encoding:mime-version:subject :message-id:date:to; s=fm3; bh=tFLjZo0XtCLmtNVmFcVlzAHA5JyM28bay ZI87jtH7fg=; b=oh0EeXt6bytls0A7uwHKlqb17TPKh3FSYpl2gXoXFbe1x2dtL xfVKuJUfiFD1Vub3aHOaRGw+86husQeTOnr++JL94ZKosd6sU3vL6EclMW0AFJjX mgg+ch+dXmBm1Q/rwQ8vLLpLQGYc9qGQhEIp0dIKx/eIxAizluMtp+/MYnV8ilYk 094rFPQlrrC9AYc3ftnFIuFZod+gScNPmNkL8uSePIyeR2cRw1XEAJk0tspREK0T msyzgwx11ilwA3OU4k51bq1j7/12MHFy+XkPzXBRCxHq119MxbZdmP7HxFqWcYEK p3tHDS9+TE0FAlrjlFaXbYOAU+EMhIceTbznA==
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=content-transfer-encoding:content-type :date:from:message-id:mime-version:subject:to:x-me-proxy :x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm3; bh=tFLjZo 0XtCLmtNVmFcVlzAHA5JyM28bayZI87jtH7fg=; b=cGTFnltOyq0dvO1hgBdZBG l7bjPKPXoFb631cQrANQ/zPbEpb23d9P66eXVIQSKTyAFtUOMNsMEdhNBljU3wqS yFYxbI7D6z4pPIrBCci+4aDr6ym3wgCvo+39U54syk7krSY4J+hgblWAMseg3vMZ bmzLuZZxhRq4wqVu1kbLY3riEvYbfMLxkKUz7F1CS8TW3CDYT0LRSq0sRLZWGvJQ CZpV2c9/Er9FLg2mwmW1xL5nIPqymOZSDsSnNnuS+CCt1tKmjigcrQvocxy5ZoSe jDSaPSxIobJbBfKi/w7tRWNRt6kvt7//UI86boKE15pCb0FqCMf9R8Nc/jvR8GoA ==
X-ME-Sender: <xms:BscrXz5YR5BD3h0bbpvVIRRLob8nV7Bcvvzyn9YvivibLjotZtZHRg>
X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduiedrkedtgdduudcutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecunecujfgurhephfgtgfgguffkfffvofesthhqmhdthh dtvdenucfhrhhomhepofgrrhhkucfpohhtthhinhhghhgrmhcuoehmnhhothesmhhnohht rdhnvghtqeenucggtffrrghtthgvrhhnpeeuhfeihfdvvdeuieduleejlefhffetiedvtd dtkedtffeuvdejgeeiudffveeljeenucffohhmrghinhepghhithhhuhgsrdgtohhmpdhh thhtphifghdrohhrghdpmhhnohhtrdhnvghtnecukfhppeduudelrddujedrudehkedrvd ehudenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrihhlfhhrohhmpehm nhhothesmhhnohhtrdhnvght
X-ME-Proxy: <xmx:BscrX45ixuz6Qs8is-xEh31uPhl-Y6JYcYfUoKm0EFR1BzAzuMPLig> <xmx:BscrX6fiSwO3pChc3DdpnNcCPo8L6VlPWSt1lLImjhAv9wu778upow> <xmx:BscrX0L3yJ2BGW6ldajBo2i-9VZzInJyKYICVU3bn_makyF4vBPejQ> <xmx:B8crX5wN_jFmVpVRZcf9lpw7-ineBnKwj1JW-Ee88oVqYlT5Xbogvw>
Received: from marks-air.mnot.net (119-17-158-251.77119e.mel.static.aussiebb.net [119.17.158.251]) by mail.messagingengine.com (Postfix) with ESMTPA id AB1B430600B1 for <ietf-http-wg@w3.org>; Thu, 6 Aug 2020 05:01:57 -0400 (EDT)
From: Mark Nottingham <mnot@mnot.net>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: quoted-printable
Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.80.23.2.2\))
Message-Id: <97385692-BFF5-4FD2-A2EB-EC499182DCA6@mnot.net>
Date: Thu, 6 Aug 2020 19:01:54 +1000
To: HTTP Working Group <ietf-http-wg@w3.org>
X-Mailer: Apple Mail (2.3608.80.23.2.2)
Received-SPF: pass client-ip=64.147.123.19; envelope-from=mnot@mnot.net; helo=wout3-smtp.messagingengine.com
X-W3C-Hub-Spam-Status: No, score=-9.8
X-W3C-Hub-Spam-Report: BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, W3C_AA=-1, W3C_DB=-1, W3C_IRA=-1, W3C_IRR=-3, W3C_WL=-1
X-W3C-Scan-Sig: titan.w3.org 1k3bmx-00062K-14 554617fa990e243c9664258354990599
X-Original-To: ietf-http-wg@w3.org
Subject: Starting to implement Cache-Status
Archived-At: <https://www.w3.org/mid/97385692-BFF5-4FD2-A2EB-EC499182DCA6@mnot.net>
Resent-From: ietf-http-wg@w3.org
X-Mailing-List: <ietf-http-wg@w3.org> archive/latest/37924
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/Mail/>
List-Post: <mailto:ietf-http-wg@w3.org>
List-Unsubscribe: <mailto:ietf-http-wg-request@w3.org?subject=unsubscribe>

Just as a heads-up, we're starting to get implementation of Cache-Status,[1], and I suspect that we're not too far from Last Call.[2]

So far I'm aware of:

* My implementation for Fastly VCL - <https://gist.github.com/mnot/74ba8ed638a3d85659aa2868b9240d50>
* Amos' patch for Squid - <https://github.com/squid-cache/squid/pull/705>

Are there others? I'd like to get more feedback soon, before we ship it, so consider this a call for that.

Cheers,

1. https://httpwg.org/http-extensions/draft-ietf-httpbis-cache-header.html
2. Speaking as editor of that draft, not as a chair.

--
Mark Nottingham   https://www.mnot.net/