RestService::prepareTemplateData

static function prepareTemplateData($data)
{
	if (!empty($data))
	{
		$fileFields = CRestUtil::saveFile($data);

		if ($fileFields)
		{
			return file_get_contents($fileFields['tmp_name']);
		}
	}
	throw new RestException('Incorrect field TEMPLATE_DATA!', self::ERROR_TEMPLATE_VALIDATION_FAILURE);
}