Debugging some proxy things

gistfile1.txt

<?php

print "\n\nSERVER HEADERS:\n\n";
print(var_export($_SERVER, TRUE));

print "\n\nSymfony HTTP Foundation request headers:\n\n";
$request = \Drupal::request();
foreach ($request->headers->all() as $key => $header) {
  print $key . ': ' . $header[0] . "\n";    
} 

print "\n\nExpected base url: " . $request->getBaseUrl();

print "\n\nDrupal settings\n\n";
$settings = \Drupal\Core\Site\Settings::getAll();
foreach (['reverse_proxy', 'reverse_proxy_addresses', 'reverse_proxy_header', 'reverse_proxy_proto_header', 'reverse_proxy_port_header', 'reverse_proxy_host_header', 'reverse_proxy_forwarded_header'] as $key) {
  print $key . ': ' . $settings[$key] . "\n";
}