FileUploader::configureActions

public function configureActions()
{
	$configuration = parent::configureActions();

	$configuration['upload']['-prefilters'][] = ActionFilter\Csrf::class;

	$corsFilter = (new ActionFilter\Cors(null, true))
		->setAllowedMethods([
			'POST'
		])
		->setAllowedHeaders([
			'X-Upload-Content-Name',
			'Content-Type',
			'Crm-Webform-Cors',
			'Content-Range'
		]);

	$configuration['upload']['prefilters'][] = $corsFilter;

	return $configuration;
}