draft-ietf-httpbis-zstd-window-size-00.txt		draft-ietf-httpbis-zstd-window-size-latest.txt
	HTTPBIS Working Group N. Jaju, Ed.		HTTPBIS Working Group N. Jaju, Ed.
	Internet-Draft Google		Internet-Draft Google
	Intended status: Informational F. Handte, Ed.		Intended status: Informational F. Handte, Ed.
	Expires: December 14, 2024 Meta Platforms, Inc.		Expires: January 6, 2025 Meta Platforms, Inc.
	June 12, 2024		July 05, 2024
	Window Sizing for Zstandard Content Encoding		Window Sizing for Zstandard Content Encoding
	draft-ietf-httpbis-zstd-window-size-00		draft-ietf-httpbis-zstd-window-size-latest
	Abstract		Abstract
	Deployments of Zstandard, or "zstd", can use different window sizes		Deployments of Zstandard, or "zstd", can use different window sizes
	to limit memory usage during compression and decompression. Some		to limit memory usage during compression and decompression. Some
	browsers and user agents limit window sizes to mitigate memory usage		browsers and user agents limit window sizes to mitigate memory usage
	concerns, causing interoperability issues. This document updates the		concerns, causing interoperability issues. This document updates the
	window size limit in RFC8878 from a recommendation to a requirement		window size limit in RFC8878 from a recommendation to a requirement
	in HTTP contexts.		in HTTP contexts.
	skipping to change at page 1, line 36 ¶		skipping to change at page 1, line 36 ¶
	<https://httpwg.org/http-extensions/draft-ietf-httpbis-zstd-window-		<https://httpwg.org/http-extensions/draft-ietf-httpbis-zstd-window-
	size.html>. Status information for this document may be found at		size.html>. Status information for this document may be found at
	<https://datatracker.ietf.org/doc/draft-ietf-httpbis-zstd-window-		<https://datatracker.ietf.org/doc/draft-ietf-httpbis-zstd-window-
	size/>.		size/>.
	Discussion of this document takes place on the HTTP Working Group		Discussion of this document takes place on the HTTP Working Group
	mailing list (<mailto:ietf-http-wg@w3.org>), which is archived at		mailing list (<mailto:ietf-http-wg@w3.org>), which is archived at
	<https://lists.w3.org/Archives/Public/ietf-http-wg/>.		<https://lists.w3.org/Archives/Public/ietf-http-wg/>.
	Source for this draft and an issue tracker can be found at		Source for this draft and an issue tracker can be found at
	<https://github.com/https://github.com/httpwg/http-extensions/labels/		<https://github.com/httpwg/http-extensions/labels/zstd-window-size>.
	zstd-window-size>.
	Status of This Memo		Status of This Memo
	This Internet-Draft is submitted in full conformance with the		This Internet-Draft is submitted in full conformance with the
	provisions of BCP 78 and BCP 79.		provisions of BCP 78 and BCP 79.
	Internet-Drafts are working documents of the Internet Engineering		Internet-Drafts are working documents of the Internet Engineering
	Task Force (IETF). Note that other groups may also distribute		Task Force (IETF). Note that other groups may also distribute
	working documents as Internet-Drafts. The list of current Internet-		working documents as Internet-Drafts. The list of current Internet-
	Drafts is at https://datatracker.ietf.org/drafts/current/.		Drafts is at https://datatracker.ietf.org/drafts/current/.
	Internet-Drafts are draft documents valid for a maximum of six months		Internet-Drafts are draft documents valid for a maximum of six months
	and may be updated, replaced, or obsoleted by other documents at any		and may be updated, replaced, or obsoleted by other documents at any
	time. It is inappropriate to use Internet-Drafts as reference		time. It is inappropriate to use Internet-Drafts as reference
	material or to cite them other than as "work in progress."		material or to cite them other than as "work in progress."
	This Internet-Draft will expire on December 14, 2024.		This Internet-Draft will expire on January 6, 2025.
	Copyright Notice		Copyright Notice
	Copyright (c) 2024 IETF Trust and the persons identified as the		Copyright (c) 2024 IETF Trust and the persons identified as the
	document authors. All rights reserved.		document authors. All rights reserved.
	This document is subject to BCP 78 and the IETF Trust's Legal		This document is subject to BCP 78 and the IETF Trust's Legal
	Provisions Relating to IETF Documents		Provisions Relating to IETF Documents
	(https://trustee.ietf.org/license-info) in effect on the date of		(https://trustee.ietf.org/license-info) in effect on the date of
	publication of this document. Please review these documents		publication of this document. Please review these documents
	skipping to change at page 3, line 19 ¶		skipping to change at page 3, line 17 ¶
	failures to decode responses when the content is compressed with a		failures to decode responses when the content is compressed with a
	larger Window_Size than the recipient allows, leading to decreased		larger Window_Size than the recipient allows, leading to decreased
	interoperability.		interoperability.
	[RFC8878], Section 3.1.1.1.2 recommends that decoders support a		[RFC8878], Section 3.1.1.1.2 recommends that decoders support a
	Window_Size of up to 8 MB, and that encoders not generate frames		Window_Size of up to 8 MB, and that encoders not generate frames
	using a Window_Size larger than 8 MB. However, it imposes no		using a Window_Size larger than 8 MB. However, it imposes no
	requirements.		requirements.
	This document updates [RFC8878] to enforce Window_Size limits on the		This document updates [RFC8878] to enforce Window_Size limits on the
	encoder and decoder for the "zstd" content coding.		encoder and decoder for the "zstd" HTTP content coding.
	2. Conventions and Definitions		2. Conventions and Definitions
	The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",		The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
	"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and		"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
	"OPTIONAL" in this document are to be interpreted as described in		"OPTIONAL" in this document are to be interpreted as described in
	BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all		BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all
	capitals, as shown here.		capitals, as shown here.
	3. Window Size		3. Window Size
End of changes. 5 change blocks.
	7 lines changed or deleted		6 lines changed or added
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