varnish

varnish

backend default {
    .host = "local.app.com";
    .port = "8080";
}

sub vcl_recv {
    if (req.request == "GET" && req.url ~ "\.(gif|jpg|jpeg|png|ico)$") {
        return(lookup);
    }
    else {
        return(pass);
    }

    # If our backend is down, unset all cookies and serve pages from cache.
    if (!req.backend.healthy) {
        unset req.http.Cookie;
    }

    # exclude
    if (req.url ~ "^/admin/.*$" ||
        req.url ~ "^/user/.*$") {
        return (pass);
    }

    unset req.http.Accept-Encoding;
    unset req.http.Vary;
    set req.http.Surrogate-Capability = "abc=ESI/1.0";
}

sub vcl_fetch {
    set beresp.do_esi = true;
    set beresp.ttl = 24 h;
}

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

  return(deliver);
}