DownloadController::checkPermissions

protected function checkPermissions()
{
	$securityContext = $this->file->getStorage()->getCurrentUserSecurityContext();
	if(!$this->file->canRead($securityContext))
	{
		$this->errorCollection->addOne(new Error(Loc::getMessage('DISK_DOWNLOAD_CONTROLLER_ERROR_BAD_RIGHTS'), self::ERROR_BAD_RIGHTS));

		if(Desktop::getDiskVersion())
		{
			$this->sendJsonErrorResponse();
		}
		//general for user we show simple message
		$this->sendResponse(Loc::getMessage('DISK_DOWNLOAD_CONTROLLER_ERROR_BAD_RIGHTS'));
	}
}