{% if env.NGX_HTTP_X_FORWARDED == 'pass' %}
request_headers:
  X-Forwarded-Proto: '$scheme'
  X-Forwarded-Host: '$host'
  X-Forwarded-Port: '$server_port'
  X-Forwarded-For: '$proxy_add_x_forwarded_for'
{% elif env.NGX_HTTP_X_FORWARDED == 'remove' %}
request_headers:
  X-Forwarded-Proto: ''
  X-Forwarded-Host: ''
  X-Forwarded-Port: ''
  X-Forwarded-For: ''
{% endif %}