gistfile1.txt

acl purge {
  "localhost";
  "192.168.100.0"/24;
}

if ( req.request == "PURGE" ) {
  if (!client.ip ~ purge) {
    error 405 "Not allowed";
  }
  if ( req.http.x-purge ) {
    purge("req.url ~ " req.http.x-purge " && req.http.host == " req.http.host);
  } else {
    purge("req.url == " req.url " && req.http.host == " req.http.host);
  }
  error 200 "Purged";
}