Catch-all redirect but keep subdomain

I want to setup a catch-all redirect for domain B that redirects to domain A but keeps the subdomain and URI of the original request.
An example config could look like this:

* {
    redir {scheme}://{subdomain}{uri}

Is such a redirect possible?

Any ideas how I can write such a redirect rule?

While rewrite supports regex, redir does not. Nor is there an appropriate request placeholder. It may not be possible for Caddy to perform a redir that carries the subdomain forward as you’ve specified.

If you have a list of subdomains you expect to use, you can add a directive to your Caddyfile for each one.

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Thank you for your response, I have a list of subdomains to use and I will add them manually to each directive.

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