HTTP Alternative Services
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From: The IESG <email@example.com> To: "IETF-Announce" <firstname.lastname@example.org> Cc: email@example.com, firstname.lastname@example.org, email@example.com, "Mike Bishop" <firstname.lastname@example.org>, email@example.com, firstname.lastname@example.org, "The IESG" <email@example.com>, firstname.lastname@example.org Subject: Protocol Action: 'HTTP Alternative Services' to Proposed Standard (draft-ietf-httpbis-alt-svc-13.txt) The IESG has approved the following document: - 'HTTP Alternative Services' (draft-ietf-httpbis-alt-svc-13.txt) as Proposed Standard This document is the product of the Hypertext Transfer Protocol Working Group. The IESG contact persons are Ben Campbell, Barry Leiba and Alissa Cooper. A URL of this Internet Draft is: https://datatracker.ietf.org/doc/draft-ietf-httpbis-alt-svc/
Technical Summary This document specifies a method to provide clients authoritative access to HTTP origins at a different network location and/or using a different protocol stack. The requested publication type is Proposed Standard. Review and Consensus The document started as an individual draft which provided a potential solution to several related problems in the HTTP space, helping clients become aware of multiple network or protocol endpoints for an origin that could serve the same content in different ways. It drew inspiration from an existing proprietary solution, Alternate-Protocol, used by Chromium during SPDY development. During the HTTP/2 standardization process, the Alt-Svc document was discussed and worked on in parallel; HTTP/2-specific pieces were originally added to the HTTP/2 specification at the time of adoption, but were moved into this document after HTTP/2's extension story was agreed upon. Technical discussions involved a broad section of the working group, with the most focus from a few client and proxy implementers. There has been some back and forth about the right balance between utility and security, but the document now reflects general consensus. This is reflected by a thoroughly-discussed Security Considerations section, which covers ways in which Alt-Svc could be used to track clients or persist attacks, and gives guidance to implementations on ways to minimize the potential impacts. Personnel Mike Bishop is the document shepherd; Barry Leiba is the responsible Area Director.