Proxy node for request analysis

[Yaro7619]

Ok.
I think I found it.

Wildcard in http-in node (catch-all mode)

Have you tried setting the path field to /subdir/* ? That already does what you are asking for. The only caveat is that it will not handle a request for /subdir - it needs the trailing / to match. If you want to handle /subdir as well, then you can use /subdir/?*