Early-Data
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The Early-Data header is set by
an intermediary to indicate that the request has been conveyed in TLS early data,
and also indicates that the intermediary understands the 425 (Too Early) status code.
The Early-Data header is not set by the originator of the
request (i.e., a browser).
| Header type | Request header |
|---|---|
| Forbidden header name | no |
Syntax
http
Early-Data: 1
Examples
http
GET /resource HTTP/1.0
Host: example.com
Early-Data: 1
Specifications
| Specification |
|---|
| Using Early Data in HTTP # header |
Browser compatibility
BCD tables only load in the browser