Web Bundles
draft-yasskin-wpack-bundled-exchanges-03
Network Working Group J. Yasskin
Internet-Draft Google
Intended status: Standards Track 27 July 2020
Expires: 28 January 2021
Web Bundles
draft-yasskin-wpack-bundled-exchanges-03
Abstract
Web bundles provide a way to bundle up groups of HTTP responses, with
the URLs and request URLs that produced them, to transmit or store
them together. They can include multiple top-level resources with
one identified as the default by a primaryUrl metadata, provide
random access to their component exchanges, and efficiently store
8-bit resources.
Note to Readers
Discussion of this draft takes place on the wpack mailing list
(wpack@ietf.org), which is archived at
https://www.ietf.org/mailman/listinfo/wpack
(https://www.ietf.org/mailman/listinfo/wpack).
The source code and issues list for this draft can be found in
https://github.com/WICG/webpackage (https://github.com/WICG/
webpackage).
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on 28 January 2021.
Yasskin Expires 28 January 2021 [Page 1]
Internet-Draft Web Bundles July 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
1.2. Mode of specification . . . . . . . . . . . . . . . . . . 3
2. Semantics . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1. Stream attributes and operations . . . . . . . . . . . . 4
2.2. Load a bundle's metadata . . . . . . . . . . . . . . . . 4
2.2.1. Load a bundle's metadata from the end . . . . . . . . 5
2.3. Load a response from a bundle . . . . . . . . . . . . . . 5
3. Format . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1. Top-level structure . . . . . . . . . . . . . . . . . . . 6
3.2. Serving constraints . . . . . . . . . . . . . . . . . . . 7
3.3. Load a bundle's metadata . . . . . . . . . . . . . . . . 7
3.3.1. Parsing the index section . . . . . . . . . . . . . . 10
3.3.2. Parsing the manifest section . . . . . . . . . . . . 13
3.3.3. Parsing the signatures section . . . . . . . . . . . 13
3.3.4. Parsing the critical section . . . . . . . . . . . . 15
3.3.5. The responses section . . . . . . . . . . . . . . . . 15
3.3.6. Starting from the end . . . . . . . . . . . . . . . . 15
3.4. Load a response from a bundle . . . . . . . . . . . . . . 16
3.5. Parsing CBOR items . . . . . . . . . . . . . . . . . . . 18
3.5.1. Parse a known-length item . . . . . . . . . . . . . . 18
3.5.2. Parsing variable-length data from a bytestring . . . 19
3.5.3. Parsing the type and argument of a CBOR item . . . . 19
3.6. Interpreting CBOR HTTP headers . . . . . . . . . . . . . 20
4. Guidelines for bundle authors . . . . . . . . . . . . . . . . 21
5. Security Considerations . . . . . . . . . . . . . . . . . . . 21
5.1. Version skew . . . . . . . . . . . . . . . . . . . . . . 21
5.2. Content sniffing . . . . . . . . . . . . . . . . . . . . 21
6. IANA considerations . . . . . . . . . . . . . . . . . . . . . 23
6.1. Internet Media Type Registration . . . . . . . . . . . . 23
6.2. Web Bundle Section Name Registry . . . . . . . . . . . . 24
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 25
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