HAProxy: Possible to dynamically construct new headers based on the HTTP request?

Question

I'd like to create a header that contains the full URL of the request. So for example:

reqadd X-Request-URL:\ ${X-Forwarded-Proto}:\/\/${Host}${Path}

Is something like this possible?

Answer 1

Unfortunately, no. The header manipulation configuration commands only support adding or substituting in static strings, not dynamic variables. HAProxy remains relatively lightweight in this way in order to keep it's speed up.