To be able to config a custom logout redirect Uri

[quenenni]

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Feature request

Which Nextcloud Version are you currently using: (see administration page)
v30.0.9

Is your feature request related to a problem? Please describe.
When doing a logout from NC, the post_logout_redirect_uri redirect auto to the cloud login page and I would like to be able to config that Uri.

Describe the solution you'd like
An option in the configuration page where you can set the logout redirect Uri

Additional context
I was able to to this by modifying the file apps/user_oidc/lib/Controller/LoginController.php (line 636):
$endSessionEndpoint .= '?post_logout_redirect_uri=' . $targetUrl;

and replace it with my Uri:
$endSessionEndpoint .= '?post_logout_redirect_uri=https://auth.xxx.coop/';

But, of course, that's not the right way to do it, but it works.

Would it be possible to add an option for this?

Thanks

[quenenni]

Sorry, I missed the issue #993 that looks similar.
Well, I have the impression the question is the same, but the answer given is not what I mean, si I'm a bit confused about it being the same or not.

[julien-nc]

Hey, it's not a duplicate as the other issue mentions that the redirect to the root NC URL does not happen after logout. It is rather a problem than a feature request.

About your feature request, it's done in #1120 . There's a new provider setting to choose the post logout URI. This URI has to be accepted/authorized/whitelisted on the IdP side.

If this PR is accepted, it will be included in the release we'll make after it's merged.