/**
  * Reads config from request
  */
 function read_request()
 {
     require_once W3TC_LIB_W3_DIR . '/Request.php';
     $request = W3_Request::get_request();
     foreach ($this->_keys as $key => $type) {
         $request_key = str_replace('.', '_', $key);
         if (!isset($request[$request_key])) {
             continue;
         }
         switch ($type) {
             case 'string':
                 $this->set($key, W3_Request::get_string($request_key));
                 break;
             case 'int':
             case 'integer':
                 $this->set($key, W3_Request::get_integer($request_key));
                 break;
             case 'float':
             case 'double':
                 $this->set($key, W3_Request::get_double($request_key));
                 break;
             case 'bool':
             case 'boolean':
                 $this->set($key, W3_Request::get_boolean($request_key));
                 break;
             case 'array':
                 $this->set($key, W3_Request::get_array($request_key));
                 break;
         }
     }
 }