Early-Data

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

实验性: 这是一项实验性技术
在将其用于生产之前,请仔细检查浏览器兼容性表格

Early-Data 头(header)由某个中间者设置来表示请求已在 TLS early data 中传送,且表示 某个中间者理解 425 (Too Early) 状态码。Early-Data 头(header)不由请求的发起者设置 (例如,浏览器)。

Header type Request header
Forbidden header name no

语法

Early-Data: 1

示例

GET /resource HTTP/1.0
Host: example.com
Early-Data: 1

规范

Specification
Using Early Data in HTTP
# header

浏览器兼容性

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Early-Data
Experimental

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support
Experimental. Expect behavior to change in the future.
See implementation notes.