Re: [whatwg/fetch] Investigate usage of "append" for headers (Issue #1850) from Valentin Sarychev on 2025-09-15 (public-webapps-github@w3.org from September 2025)

From: Valentin Sarychev <notifications@github.com>
Date: Mon, 15 Sep 2025 07:29:07 -0700
To: whatwg/fetch <fetch@noreply.github.com>
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Message-ID: <whatwg/fetch/issues/1850/3292471536@github.com>

dizel3d left a comment (whatwg/fetch#1850)

If I understand correctly, `Accept-Encoding` was restricted to the single value `identity` because [7 years ago 3.21% of web servers handled the request incorrectly](https://github.com/whatwg/fetch/issues/747#issuecomment-393572169). However, I would also like to point out that this has removed the possibility of selectively reading files compressed with `deflate`, `zstd`, or `brotli`.
Has anyone checked how many web servers respond incorrectly to `Accept-Encoding: deflate, identity` (like modern Firefox) or `Accept-Encoding: identity, deflate`?

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Received on Monday, 15 September 2025 14:29:11 UTC