friendica-github/src/Module/Maintenance.php

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<?php
namespace Friendica\Module;
use Friendica\BaseModule;
use Friendica\Core\L10n;
use Friendica\Core\Renderer;
use Friendica\Core\System;
use Friendica\Util\Strings;
/**
* Shows the maintenance reason
* or redirects to the alternate location
*/
class Maintenance extends BaseModule
{
public static function content()
{
$config = self::getApp()->getConfig();
$reason = $config->get('system', 'maintenance_reason');
if ((substr(Strings::normaliseLink($reason), 0, 7) === 'http://') ||
(substr(Strings::normaliseLink($reason), 0, 8) === 'https://')) {
System::externalRedirect($reason, 307);
}
header('HTTP/1.1 503 Service Temporarily Unavailable');
header('Status: 503 Service Temporarily Unavailable');
header('Retry-After: 600');
return Renderer::replaceMacros(Renderer::getMarkupTemplate('maintenance.tpl'), [
'$sysdown' => L10n::t('System down for maintenance'),
'$reason' => $reason
]);
}
}