How do I access the domain of a page or the absolute URL of an image?

There are occasions where it’s necessary to generate absolute URLs, or at least determine the domain of a certain page.

For example with OpenGraph/Schema.org tags, the canonical URL of a page is necessary. This is possible with page.full_url(). However OpenGraph also requires an absolute URL for the og:image meta tag i.e an absolute URL for an image. How would that be generated? Perhaps, given that the image library is domain-agnostic, it would be better if there were an option to get the domain on it’s own, of any page viewed, so it could be prefixed to a relative image URL?

It feels like there’s a need for a page.get_site() (returning a Site) or similar, to make access easier for the non-technical.

[Braintelligence]

@gasman Sorry for the misunderstanding. The issue is explicitly about this:

However OpenGraph also requires an absolute URL for the og:image meta tag

but I don’t see the solution presented, thus I can’t comprehend the solution. That’s why I thought I could ask for it here.

I will tend to the Google group then.

EDIT: For anyone who might stumble upon this and looking for a solution, you can do it like this:

{{ page.get_site.root_url }}{{ header_image.url }}

[gasman]

@Braintelligence Please use the Wagtail support Google group for support queries.