function domain_301_redirect_check_domain in Domain 301 Redirect 7

Checks if a domain actually points to this site.

Parameters

string $domain: The domain to be checked.

Return value

bool Returns TRUE if the domain passes the check. FALSE otherwise.

2 calls to domain_301_redirect_check_domain()

domain_301_redirect_admin_form_validate in ./domain_301_redirect.admin.inc

Validation hook for Domain 301 Redirect Admin page.

domain_301_redirect_cron in ./domain_301_redirect.module

Implements hook_cron().

File

./domain_301_redirect.module, line 194

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

Code

function domain_301_redirect_check_domain($domain) {
  if (!empty($domain)) {
    $retries = variable_get('domain_301_redirect_domain_check_retries', 3);

    // Try to contact the redirect domain, if this fails, retry N times after a pause.
    for ($i = 1; $i <= $retries; $i++) {
      $time = time();
      $hash = drupal_hmac_base64('domain_301_redirect_check_domain', $time . drupal_get_private_key() . drupal_get_hash_salt());
      $result = drupal_http_request($domain . '/domain_301_redirect_check/' . $time);
      if (!empty($result) && $result->data == $hash) {
        return TRUE;
      }
      elseif ($i < $retries) {

        // Pause between retries.
        sleep(10);
      }
    }
  }
  return FALSE;
}