Q: referrer from signed http exchanged page

[Jxck]

1, navigate to https://example.com/a.sxg
2, a.sxg is signed by https://example.net so browser display it as https://example.net
3, clicking the link on https://example.net

in request of 3, which origin should on referrer header example.com (actual) or example.net (display) ?
(spec seems not mention this: https://wicg.github.io/webpackage/draft-yasskin-http-origin-signed-responses.html)

[kinu]

That should be example.net I believe. Also example.net is the actual origin once UA is navigated to the exchange. The loading sketch in the explainer discusses some of these (while not clearly specifying details like referrers)

[Jxck]

is there any plan to add actual url(example.com) on request header like referrer ?

[jyasskin]

There's no plan to add a new Referer-like header that identifies the physical URL of the referrer. It's always possible, of course, given a strong enough use case.

[jyasskin]

#433 discusses the architectural question here.