Varnish VCL example for purging wildcard URLs

purge.vcl

# This goes in vcl_recv
# It gives you:
# curl -X PURGE http://some.example.com/.*
# curl -X PURGE http://some.example.com/blog/.*
# curl -X PURGE http://some.example.com/blog/2011/bar.html
# curl -X PURGE http://another.example.com/.*
#
if (req.request == "PURGE") {
      # Wildcard, per-domain purging
      purge("req.http.host == " req.http.host " && req.url ~ " req.url "$"); 
      error 200 "Purged.";
  }