Available-Dictionary
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
Please take two minutes to fill out our short survey.
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The HTTP Available-Dictionary request header allows the browser to specify the best matching dictionary it has to allow the server to use Compression Dictionary Transport for a resource request.
See the Compression Dictionary Transport guide for more information.
Syntax
Clients can send an Available-Dictionary header when they support dcb or dcz encodings. The header is a colon-surrounded base-64 encoded SHA-256 hash of the dictionary contents.
http
Available-Dictionary: :<base64-hash>:
Directives
<base64-hash>-
A base-64 encoded SHA-256 hash of the dictionary contents.
Examples
http
Accept-Encoding: gzip, br, zstd, dcb, dcz
Available-Dictionary: :pZGm1Av0IEBKARczz7exkNYsZb8LzaMrV7J32a2fFG4=:
Specifications
| Specification |
|---|
| Compression Dictionary Transport # name-available-dictionary |