Use the correct google country domain in your nginx content-security-policy header, instead of all of them

nginx-google-domain-csp-map.sh

#!/bin/bash
#
# Generates an nginx compatible map that you can use to
# put the relevant Google country code in your Content-Security-Policy
# instead of having them all.
#
# Add these to your nginx config:
# geoip2 /path/to/GeoLite2-Country.mmdb {
#   $geoip2_country_code default=US source=$remote_addr country iso_code;
#   $geoip2_country_name country names en;
# }
#
# Then the map output of this script: 
# map $geoip2_country_code $google_domain {
#   US *.google.com;
#   AD *.google.ad;
#   ...
#   ...
#  }
#
# Then the CSP header line:
# add_header Content-Security-Policy "default-src example.com $google_domain;";

echo "map \$geoip2_country_code \$google_domain {"
# fetch the domains
country_tlds=$(curl -s https://www.google.com/supported_domains)
for tld in $country_tlds
  # fetch the characters after the last .
  # .google.ad becomes ad
  do iso_country=${tld##*.}

  # Upcase the ISO country code and do a couple of replacements:
  #
  # COM needs to be US ISO
  # The UK's ISO is actually GB
  #
  # Then echo out the map line
  echo -e "\t$(echo $iso_country | tr '[:lower:]' '[:upper:]' | sed 's/COM/US/' | sed 's/UK/GB/') *${tld};"
done
echo "}"

Means you no longer have to have a CSP like:

content-security-policy: default-src example.com *.google.com *.google.ad *.google.ae *.google.com.af *.google.com.ag *.google.com.ai *.google.al *.google.am *.google.co.ao *.google.com.ar *.google.as *.google.at *.google.com.au *.google.az *.google.ba *.google.com.bd *.google.be *.google.bf *.google.bg *.google.com.bh *.google.bi *.google.bj *.google.com.bn *.google.com.bo *.google.com.br *.google.bs *.google.bt *.google.co.bw *.google.by *.google.com.bz *.google.ca *.google.cd *.google.cf *.google.cg *.google.ch *.google.ci *.google.co.ck *.google.cl *.google.cm *.google.cn *.google.com.co *.google.co.cr *.google.com.cu *.google.cv *.google.com.cy *.google.cz *.google.de *.google.dj *.google.dk *.google.dm *.google.com.do *.google.dz *.google.com.ec *.google.ee *.google.com.eg *.google.es *.google.com.et *.google.fi *.google.com.fj *.google.fm *.google.fr *.google.ga *.google.ge *.google.gg *.google.com.gh *.google.com.gi *.google.gl *.google.gm *.google.gr *.google.com.gt *.google.gy *.google.com.hk *.google.hn *.google.hr *.google.ht *.google.hu *.google.co.id *.google.ie *.google.co.il *.google.im *.google.co.in *.google.iq *.google.is *.google.it *.google.je *.google.com.jm *.google.jo *.google.co.jp *.google.co.ke *.google.com.kh *.google.ki *.google.kg *.google.co.kr *.google.com.kw *.google.kz *.google.la *.google.com.lb *.google.li *.google.lk *.google.co.ls *.google.lt *.google.lu *.google.lv *.google.com.ly *.google.co.ma *.google.md *.google.me *.google.mg *.google.mk *.google.ml *.google.com.mm *.google.mn *.google.ms *.google.com.mt *.google.mu *.google.mv *.google.mw *.google.com.mx *.google.com.my *.google.co.mz *.google.com.na *.google.com.ng *.google.com.ni *.google.ne *.google.nl *.google.no *.google.com.np *.google.nr *.google.nu *.google.co.nz *.google.com.om *.google.com.pa *.google.com.pe *.google.com.pg *.google.com.ph *.google.com.pk *.google.pl *.google.pn *.google.com.pr *.google.ps *.google.pt *.google.com.py *.google.com.qa *.google.ro *.google.ru *.google.rw *.google.com.sa *.google.com.sb *.google.sc *.google.se *.google.com.sg *.google.sh *.google.si *.google.sk *.google.com.sl *.google.sn *.google.so *.google.sm *.google.sr *.google.st *.google.com.sv *.google.td *.google.tg *.google.co.th *.google.com.tj *.google.tl *.google.tm *.google.tn *.google.to *.google.com.tr *.google.tt *.google.com.tw *.google.co.tz *.google.com.ua *.google.co.ug *.google.co.uk *.google.com.uy *.google.co.uz *.google.com.vc *.google.co.ve *.google.vg *.google.co.vi *.google.com.vn *.google.vu *.google.ws *.google.rs *.google.co.za *.google.co.zm *.google.co.zw *.google.cat 'report-sample'; report-uri https://example.com/csp_logger