function MemcacheStoragePageCache::set in Memcache Storage 7

Ovirrides MemcacheStorage::set().

Overrides MemcacheStorage::set

File

./memcache_storage.page_cache.inc, line 39

Provides class for memcached data handling within cache_page bin.

Class

MemcacheStoragePageCache

Class handles memcached cache objects.

Code

function set($cid, $data, $expire = CACHE_PERMANENT) {

  // Some servers (like Nginx) may access page cache directly from memcached pool
  // to avoid passing request to the backend. But they only know how to get
  // simple HTML string, not an objects. So we have to store simple HTML code.
  if (MEMCACHE_STORAGE_EXTERNAL_PAGE_CACHE && !empty($data['body'])) {

    // Make sure that page doesn't have 403 or 404 header.
    // Otherwise nginx or varnish will deliver such pages with header
    // 200, which is obviously wrong.
    if (!empty($data['headers']['Status'])) {
      $status = $data['headers']['Status'];
      if (in_array($status, array(
        '403 Forbidden',
        '404 Not Found',
      ))) {
        return FALSE;
      }
    }

    // Developers may set custom expiration for cached pages in settings.php.
    $custom_expiration = variable_get('memcache_storage_page_cache_custom_expiration', FALSE);
    if ($custom_expiration) {
      $expire = variable_get('memcache_storage_page_cache_expire', 0);
    }

    // Memcached supports TTL in second from current timestamp.
    $expire = $expire > REQUEST_TIME ? $expire - REQUEST_TIME : $expire;

    // Memcached doesn't support expiration values less than 0 (CACHE_PERMANENT).
    $expire = $expire < CACHE_PERMANENT ? CACHE_PERMANENT : $expire;
    return MemcacheStorageAPI::set($cid, $data['body'], $expire, $this->bin);
  }

  // Process cache set as usual.
  return parent::set($cid, $data, $expire);
}