domain_301_redirect.module in Domain 301 Redirect 8

This module allows you to 301 redirect all domains to one specific domain.

File

domain_301_redirect.module

<?php

/**
 * @file
 * This module allows you to 301 redirect all domains to one specific domain.
 */
use Drupal\Core\Routing\RouteMatchInterface;

/**
 * Implements hook_help().
 */
function domain_301_redirect_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    case 'help.page.domain_301_redirect':
      $output = '';
      $output .= t('The Domain 301 Redirect module allows sites to 301 redirect to a domain that is marked as the main domain. This means you can have all subdomains and other domains 301 redirect to a domain that you choose as the main domain. This provides great SEO benefit.');
      return [
        '#markup' => $output,
      ];
  }
}

/**
 * Implements hook_cron().
 */
function domain_301_redirect_cron() {
  $config = \Drupal::config('domain_301_redirect.settings');
  $enabled = $config
    ->get('enabled');
  $domain = $config
    ->get('domain');
  $check_period = $config
    ->get('check_period');
  $last_checked = $config
    ->get('last_checked');
  $reenable = $config
    ->get('check_reenable');
  $disabled_by_check = $config
    ->get('disabled_by_check');

  // If the redirect is enabled (or has been previously disabled) and we are
  // checking for domain availability on cron, then attempt to request the test
  // url using the redirect domain.
  if (($enabled || $disabled_by_check && $reenable) && !empty($check_period) && $last_checked < time() - $check_period) {
    if (!preg_match('|^https?://|', $domain)) {
      $domain = 'http://' . $domain;
    }
    $domain_parts = parse_url($domain);
    $domain = $domain_parts['scheme'] . '://' . $domain_parts['host'];
    $manager = Drupal::service('domain_301_redirect.manager');
    $config = \Drupal::configFactory()
      ->getEditable('domain_301_redirect.settings');
    if (!$manager
      ->checkDomain($domain)) {
      $config
        ->set('enabled', 0)
        ->set('disabled_by_check', TRUE);
      \Drupal::logger('domain_301_redirect')
        ->error('The domain %domain no longer points to this site. Domain 301 redirection was disabled.', [
        '%domain' => $domain,
      ]);
    }
    else {
      \Drupal::logger('domain_301_redirect')
        ->info('Domain 301 redirect check passed.');

      // If the redirect was disabled by cron, and it has now passed,
      // re-enable it.
      if (!$enabled && $reenable && $disabled_by_check) {
        $config
          ->set('enabled', 1)
          ->set('disabled_by_check', FALSE);
        \Drupal::logger('domain_301_redirect')
          ->error('The domain %domain has become available again. Domain 301 redirection was re-enabled.', [
          '%domain' => $domain,
        ]);
      }
    }
    $config
      ->set('redirect_last_checked', time())
      ->save();
  }
}

Functions

Name	Description
domain_301_redirect_cron	Implements hook_cron().
domain_301_redirect_help	Implements hook_help().