Not to be confused with webpack, this repository
holds a collection of specifications aimed at packaging websites. These
specifications replace the
W3C TAG's Web Packaging
Draft and will allow people
to bundle together the resources that make up a website, so they can be shared
offline, either with or without a proof that they came from the original
website. A full list of use cases and resulting requirements is available in
The explainer walks through how to use these specs for to
achieve the use cases.
The specifications come in a couple layers:
- Signed HTTP exchanges (IETF draft): These allow a browser to trust that a single HTTP request/response pair was generated by the origin it claims.
- Bundled HTTP exchanges (IETF draft: A collection of exchanges, each of which could be signed or unsigned, with some metadata describing how to interpret the bundle as a whole. This specification has an initial draft in a PR, but isn't finished yet. This work may proceed through either the IETF or the W3C/WHATWG.
- Loading: A description of how browsers load signed and bundled exchanges. This will be initially specified in the WICG and then will merge into the appropriate specs, e.g. Fetch, that live in either the W3C or WHATWG. Currently we only have a sketch for signed exchange cases.
A previous draft of the format combined layers 1 and 2 into a single format for signed packages: draft-yasskin-dispatch-web-packaging (IETF draft). The DISPATCH WG at IETF99 recommended the current split.
Building this repository
Building the Draft
Formatted text and HTML versions of the draft can be built using
This requires that you have software installed as described in https://github.com/martinthomson/i-d-template/blob/master/doc/SETUP.md.
Install this with
go install github.com/WICG/webpackage/go/signedexchange/cmd/gen-signedexchange.
See go/signedexchange for the usage of the tool.