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Re: No-Vary-Search

Rory Hewitt <rory.hewitt@gmail.com> Tue, 18 June 2024 22:50 UTC

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From: Rory Hewitt <rory.hewitt@gmail.com>
Date: Tue, 18 Jun 2024 15:49:39 -0700
Message-ID: <CAEmMwDwwFxBOU5LN-j0MvVSMnm9k55+y625kJtkZFMaKf8quzw@mail.gmail.com>
To: David Benjamin <davidben@chromium.org>
Cc: Jeremy Roman <jbroman@chromium.org>, ietf-http-wg@w3.org
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Subject: Re: No-Vary-Search
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Hi David,

> It says nothing about the URL query/search field and could just as easily
describe the HTTP request headers or other things that the response doesn't
vary on.

Well the nice thing is that if you choose a generic name for the header
(i.e. not including 'search'), then even if it *initially* only applies to
query params, if at some point in the future we want to also allow it to
include other things (thumb-in-the-air example: shared caching across
subdomains like "www" and "api" and the TLD) then you don't need to create
an entirely new header - you just add new allowed values to this header.

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