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We have Cloudflare sitting in front of our Drupal sites - and in order to take advantage of their "AlwaysOnline" feature - we need to alter the response code sent in the event of an error.

I want to cater for when the database is unavailable - as this can sometimes happen when upgrading the MySQL server.

The only way I've found so far is to hack the errors.inc file:

if ($fatal) {
    drupal_add_http_header('Status', '504 Service unavailable (with message)');
  }

Is there a more elegant way to achieve what I'm after?

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1 Answer 1

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You could use a template_preprocess_maintenance_page() invocation in your theme's template.php so that when you go to maintenance mode (or the DB is down) it will trigger your needed status code:

function MYTHEME_preprocess_maintenance_page(&$variables) {
  drupal_add_http_header('Status', '504 Service unavailable (with message)');
}
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  • This works great for the regular maintenance page - but when the Database is down - in order for the theme hook to fire, I set this in my settings: $conf['maintenance_theme'] = 'zurb_neway'; This in turn then calls system_list() to get all modules... so the page never renders?
    – Wayne Foster
    May 20, 2016 at 9:26
  • I got this working by adding your code to a simpler theme in /sites/all/themes/bartik - this now works across all my multi-site install - so great work!
    – Wayne Foster
    May 20, 2016 at 10:01

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