/**
* @param $event_type
*
* @return array
*/
public function formatJson($event_type)
{
ctools_include('plugins');
$formatters = ctools_get_plugins('bat_event', 'bat_eventstyle');
foreach ($formatters as $formatter) {
$class = ctools_plugin_get_class($formatter, 'handler');
$object_formatter = new $class($this->event);
$event = $object_formatter->format($event_type);
}
return $event;
}
/**
* Checks if the current request has reached the rate limit.
*
* If the user has reached the limit this method will throw an exception. If
* not, the hits counter will be updated for subsequent calls. Since the
* request can match multiple events, the access is only granted if all events
* are cleared.
*
* @param array $request
* The request array.
*
* @throws \RestfulFloodException if the rate limit has been reached for the
* current request.
*/
public function checkRateLimit($request) {
$now = new \DateTime();
$now->setTimestamp(REQUEST_TIME);
// Check all rate limits configured for this handler.
foreach ($this->getPlugin() as $event_name => $info) {
// Check if there is a rate_limit plugin for the event.
// There are no error checks on purpose, let the exceptions bubble up.
$rate_limit_plugin = restful_get_rate_limit_plugin($info['event']);
$rate_limit_class = ctools_plugin_get_class($rate_limit_plugin, 'class');
$handler = new $rate_limit_class($info, $this->resource);
// If the limit is unlimited then skip everything.
$limit = $handler->getLimit($this->account);
$period = $handler->getPeriod();
if ($limit == static::UNLIMITED_RATE_LIMIT) {
// User has unlimited access to the resources.
continue;
}
// If the current request matches the configured event then check if the
// limit has been reached.
if (!$handler->isRequestedEvent($request)) {
continue;
}
if (!$rate_limit_entity = $handler->loadRateLimitEntity($this->account)) {
// If there is no entity, then create one.
// We don't need to save it since it will be saved upon hit.
$rate_limit_entity = entity_create('rate_limit', array(
'timestamp' => REQUEST_TIME,
'expiration' => $now->add($period)->format('U'),
'hits' => 0,
'event' => $event_name,
'identifier' => $handler->generateIdentifier($this->account),
));
}
// When the new rate limit period starts.
$new_period = new \DateTime();
$new_period->setTimestamp($rate_limit_entity->expiration);
if ($rate_limit_entity->isExpired()) {
// If the rate limit has expired renew the timestamps and assume 0
// hits.
$rate_limit_entity->timestamp = REQUEST_TIME;
$rate_limit_entity->expiration = $now->add($period)->format('U');
$rate_limit_entity->hits = 0;
if ($limit == 0) {
$exception = new \RestfulFloodException('Rate limit reached');
$exception->setHeader('Retry-After', $new_period->format(\DateTime::RFC822));
throw $exception;
}
}
else {
if ($rate_limit_entity->hits >= $limit) {
$exception = new \RestfulFloodException('Rate limit reached');
$exception->setHeader('Retry-After', $new_period->format(\DateTime::RFC822));
throw $exception;
}
}
// Save a new hit after generating the exception to mitigate DoS attacks.
$rate_limit_entity->hit();
// Add the limit headers to the response.
$remaining = $limit == static::UNLIMITED_RATE_LIMIT ? 'unlimited' : $limit - ($rate_limit_entity->hits + 1);
drupal_add_http_header('X-Rate-Limit-Limit', $limit, TRUE);
drupal_add_http_header('X-Rate-Limit-Remaining', $remaining, TRUE);
$time_remaining = $rate_limit_entity->expiration - REQUEST_TIME;
drupal_add_http_header('X-Rate-Limit-Reset', $time_remaining, TRUE);
}
}
/**
* @see getPluginClass().
*/
protected function getPluginClasses($plugin_slot, $plugin_type, $class_type)
{
$plugin_objects = array();
foreach ($this->getPlugins($plugin_slot, $plugin_type) as $plugin) {
$class_name = ctools_plugin_get_class($plugin, $class_type);
if (!class_exists($class_name)) {
throw new Exception("Plugin slot '{$plugin_slot}' of type '{$plugin_type}' contains an invalid class name in handler slot '{$class_type}', named '{$class_name}' class", E_WARNING);
return FALSE;
}
$plugin_object = new $class_name();
$this->getBackend()->verifyPluginInterface($this, $plugin_slot, $plugin_object);
$plugin_objects[$plugin['name']] = $plugin_object;
}
return $plugin_objects;
}
