Gutenberg uses wrong url for internal REST API requests

[vavra7]

1. Make clean installation of latest wordpress on http://some-wp-domain.com
2. Go to Settings -> General and change field "Site Address (URL)" to value "http://another-frontend-domain.com". Hit "Save Changes".
3. Go to Pages -> Sample Page make a random change and hit "Update"
4. ERROR
   reason is that Guttenberg's internal request leads to
   http://another-frontend-domain.com/index.php?rest_route=%2Fwp%2Fv2%2Fpages%2F2&_locale=user
   expected is internal request to
   http://some-wp-domain.com/index.php?rest_route=%2Fwp%2Fv2%2Fpages%2F2&_locale=user

By other words: Guttenberg uses for internal REST API requests "siteurl" domain instead of "home" domain

[youknowriad]

Hi there! thanks for opening the issue.

I believe this was already discussed before and that it's the right approach. REST API folks would know more. cc @spacedmonkey @TimothyBJacobs

[TimothyBJacobs]

Yeah, Gutenberg is using the WordPress APIs for these things so it is the correct behavior according to core.

A core trac ticket was created as well but closed because that is the intended behavior and a filter exists to change it.

[youknowriad]

Thanks @TimothyBJacobs

[isuke01]

@youknowriad There is more about this issue #1761
Actually Gutenberg is using incorrect url, core return correct one if you test it ;/