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I am trying to convert a part of code from the older 2.1.5 to version 3.0.3 Having trouble with vcl_hash where syntax has changed.

Syntax from 2.1.5

sub identify_cookie {
  if (req.http.cookie ~ "cookie_city_id=") {
    set req.http.X-Cookie = regsub(req.http.cookie, ".*cookie_city_id=([^;]+);.*", "\1");

vcl_recv {
  call identify_cookie;

vcl_hash {
  if(req.http.host ~ "(^beta.bolly.in)"){
    set req.hash += req.url;
    set req.hash += req.http.X-Cookie;
    set req.hash += req.http.host;

How do I set the above in version 3.0.3? I have tried the following under vcl_hash

vcl_hash {
if (req.http.host ~ "^beta.bolly.in"){

The request always goes to backend. How do I sort this issue? I am not sure if the hash is being set

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