ansible-roles/roles/httpd_common/templates/common_env.inc.j2

# Determine which protocol to use
RewriteRule   .*         -      [E=HTTP:http]
RewriteCond   %{HTTPS}   =on
RewriteRule   .*         -      [E=HTTP:https]
{% if httpd_log_format == 'combined_virtual_backend' %}
SetEnvIf X-Forwarded-Proto https HTTPS=on
{% endif %}