Support Regex based host/path rewrites about pomerium

[desimone]

@0anton -- thanks this is a very helpful feature request. Could we talk about a specific implementation synchronously. We've had (versions) of this ask a few different times and I'd like to dive in more to your specific use-case if possible. Feel free to email me at bdd {at symbol} pomerium.com

[0anton]

Thank's for being attentive to this FR. Bob! 🙂 Sure, let's discuss! I've sent you syncrone contacts per email.

[langered]

This would be really helpful!

Additionally, it would be good to have a path to domain regex functionality. E.g.:

routes:
  - from: https://internal.host
    prefix: /app-pr-(\d{1,5})
    to: https://app-pr-$1-rkr95gieug-gs.a.run.app

When I am using the host_path_regex_rewrite_pattern in combination with the to: restricted.googleapis.com configuration, I'll always get redirected with a 307 to the internal cloud run domain, which is not public and therefore does not help at all.

[desimone]

Pending deep dive with @0anton @langered would love to have you in the discussion if you could chat synchronously.