[rfc-dist] RFC 8942 on HTTP Client Hints

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Mon Feb 8 15:37:47 PST 2021


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        RFC 8942

        Title:      HTTP Client Hints 
        Author:     I. Grigorik,
                    Y. Weiss
        Status:     Experimental
        Stream:     IETF
        Date:       February 2021
        Mailbox:    ilya at igvita.com,
                    yoav at yoav.ws
        Pages:      10
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-ietf-httpbis-client-hints-15.txt

        URL:        https://www.rfc-editor.org/info/rfc8942

        DOI:        10.17487/RFC8942

HTTP defines proactive content negotiation to allow servers to select
the appropriate response for a given request, based upon the user
agent's characteristics, as expressed in request headers. In
practice, user agents are often unwilling to send those request
headers, because it is not clear whether they will be used, and
sending them impacts both performance and privacy.

This document defines an Accept-CH response header that servers can
use to advertise their use of request headers for proactive content
negotiation, along with a set of guidelines for the creation of such
headers, colloquially known as "Client Hints."

This document is a product of the HTTP Working Group of the IETF.


EXPERIMENTAL: This memo defines an Experimental Protocol for the
Internet community.  It does not specify an Internet standard of any
kind. Discussion and suggestions for improvement are requested.
Distribution of this memo is unlimited.

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