varnish vcl

vcl 4.0;

import std;

backend default {
      // le hostname du nginx dans ma stack
      .host = "front";
      .port = "80";
}

sub vcl_recv {
    set req.http.Surrogate-Capability = "abc=ESI/1.0";
    unset req.http.Cookie;
}

//Ensuite, ce block est appelé après la réception des headers de réponse.
//Nous supprimons le header et activons les ESI
sub vcl_backend_response {
      if (beresp.http.Surrogate-Control ~ "ESI/1.0") {
          unset beresp.http.Surrogate-Control;
          set beresp.do_esi = true;
      }

      if (bereq.url ~ "\.(jpe?g|png|gif|pdf|tiff?|css|js|ttf|woff2?|otf|eot|svg)$") {
          set beresp.ttl = std.duration(beresp.http.age+"s",0s) + 24h;
      }
}

sub vcl_deliver {
    if (obj.hits > 0) {
            set resp.http.X-Cache = "HIT";
    } else {
            set resp.http.X-Cache = "MISS";
    }
}