Bug 168865 – [Fetch API] Support keepalive flag and enforce limit on inflight keepalive bytes

• Status: RESOLVED
• Resolution: CONFIGURATION CHANGED
• Component: WebCore Misc.

[Ilya Grigorik]

https://github.com/whatwg/fetch/pull/419

> Requests with keepalive flag set are allowed to outlive the environment
> settings object. We want to make sure that such requests do not
> negatively impact the user experience when a page is unloaded, etc.
> 
> This limits the amount of (body) bytes that can be inflight at any point
> when the request has the keepalive flag set; this flag is set by
> sendBeacon.


Expected results:

Webkit should support the keepalive flag & enforce the inflight byte limit.

[Thomas Wang]

Is this already implemented? WPT are passing on Safari

- https://wpt.fyi/results/fetch/api/basic/keepalive.html
- https://wpt.fyi/results/fetch/api/request/request-keepalive-quota.html%3Finclude%3Dslow-3

[Anne van Kesteren]

Yeah, there's an implementation of keepalive in WebKit.