[fr] Conditionally undo redirect on status code

[danielniccoli]

It would be great if I could define what status codes persist the redirect.

For example, I have a redirect rule from URL1 to URL2. I would like to being able to configure

1. that the redirect is only persisted when the status code of URL2 returns e.g., a 200 (user stays on redirected page), or
2. that the redirect is undone when the status code of URL2 returns e.g., a 404 (user is taken back to URL1 without any further redirect attempt).

Ideally I could choose which option a rule follows and which status to put into the condition.

[Gitoffthelawn]

That's a novel idea, and I like it.

I could also see the benefit of checking the status of URL1. IOW, only redirect if URL1 returns a 404.

If you add the code for this functionality, and can keep the UI change simple (don't want to make the UI too complex), I'll merge it. I'm hoping to perform several merges towards the end of 2023.