nginx logs to google analytics

google_analytics

# send logs for all traffic to google analytics
#
# in server block:
#  set $google_analytics_id "UA-THECORRECT-ID";
#  include            /etc/nginx/google_analytics;
#
# in location blocks:
#  post_action @ga;

userid on;
userid_name cid;
userid_expires 2y;

#userid is contained in uid_got or uid_set, depending on if it's already been set
#also the cookie variable name is included (e.g. cid=ASDF), so no need to specify it in the query params
set $cid $uid_got$uid_set;

location @ga {
  internal;
  resolver 8.8.8.8 ipv6=off;
  proxy_ignore_client_abort on;
  proxy_next_upstream timeout;
  proxy_connect_timeout 1s;

  set $ga_api "https://www.google-analytics.com";
  proxy_set_header Host "www.google-analytics.com";
  proxy_pass $ga_api/collect?v=1&dl=$scheme://$host$request_uri&tid=$google_analytics_id&$cid&uip=$remote_addr&t=pageview&cm1=$body_bytes_sent&ds=nginx&dr=$http_referer;
}