function authcache_authcache_request_exclude in Authenticated User Page Caching (Authcache) 7.2

Implements hook_authcache_request_exclude().

Related topics

File

./authcache.module, line 919

Authenticated User Page Caching (and anonymous users, too!)

Code

function authcache_authcache_request_exclude() {

  // The following four basic exclusion rules are mirrored in
  // authcacheinc_retrieve_cache_page() in authcache_builtin.cache.inc
  // BEGIN: basic exclusion rules.
  if (!($_SERVER['REQUEST_METHOD'] === 'GET' || $_SERVER['REQUEST_METHOD'] === 'HEAD')) {
    return t('Only GET and HEAD requests allowed. Method for this request is: @method.', array(
      '@method' => $_SERVER['REQUEST_METHOD'],
    ));
  }
  if (variable_get('cache') || variable_get('page_cache_without_database')) {
    return t('Drupal core page caching for anonymous users active.');
  }
  $frontscripts = variable_get('authcache_frontcontroller_whitelist', array(
    DRUPAL_ROOT . '/index.php',
  ));
  $frontscripts = array_map('realpath', $frontscripts);
  if (!in_array(realpath($_SERVER['SCRIPT_FILENAME']), $frontscripts)) {
    return t('Not invoked using an allowed front controller.');
  }

  // END: basic exclusion rules.
  //
  if (!authcache_backend()) {
    return t('No active cache backend.');
  }
  if (variable_get('authcache_noajax', FALSE) && isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) === 'xmlhttprequest') {
    return t('Ajax request');
  }
  $alias = drupal_get_path_alias($_GET['q']);

  // Now check page caching settings, defined by the site admin.
  $pagecaching = variable_get('authcache_pagecaching', _authcache_default_pagecaching());
  foreach ($pagecaching as $i => $page_rules) {
    $rule_num = $i + 1;

    // Do caching page roles apply to current user?
    if (authcache_role_restrict_access($page_rules['roles'])) {
      switch ($page_rules['option']) {
        case '0':

        // Cache every page except the listed pages.
        case '1':

          // Cache only the listed pages.
          $page_listed = drupal_match_path($alias, $page_rules['pages']);
          if (!!($page_rules['option'] xor $page_listed)) {
            return t('Caching disabled by path list of page ruleset #@number', array(
              '@number' => $rule_num,
            ));
          }
          break;
        case '2':

          // Cache pages for which the following PHP code returns TRUE.
          $result = 0;
          if (module_exists('php')) {
            $result = php_eval($page_rules['pages']);
          }
          if (empty($result)) {
            return t('Caching disabled by PHP rule of page ruleset #@number', array(
              '@number' => $rule_num,
            ));
          }
          break;
        default:
          break;
      }
      if (!empty($page_rules['noadmin']) && path_is_admin(current_path())) {
        return t('Not caching admin pages (by page ruleset #@number)', array(
          '@number' => $rule_num,
        ));
      }
    }
  }
}