Help with HTTP redirect in ALL directions

Ahh, so you don't actually want an outbound redirect, what you want is a header rewrite on the response. That makes more sense.

So all you'd need is something like:

when HTTP_RESPONSE {
  if {[HTTP::header exists "Content-Location"] } {
    HTTP::header replace "Content-Location" [string map {http://yourdomain https://yourdomain} [HTTP::header "Content-Location"]]
  }
}

This would change every occurrence of http://yourdomain in the Content-Location header to https://yourdomain.

Is that what you're looking for?

Colin