declare local var.domainsegscount INTEGER; 
  
if (!req.http.Fastly-FF && req.http.Cookie:_ga !~ "^GA"){
  
  set var.domainsegscount = std.strlen(regsuball(req.http.host, "[^\.]", ""));
  set var.domainsegscount += 1;
  
  add resp.http.set-cookie = "_ga=GA1."
    var.domainsegscount "."
    randomint(1000000000, 2147483647) "."
    now.sec ";" 
    "Domain=.fiddle.fastlydemo.net;"
    "Max-Age=63072000;"
  ;
  
  # Prevent browser from caching a set-cookie
  set resp.http.cache-control:no-store = "";
}