/**
  * Get license for encrypted content playback
  * 
  * @action getLicense
  * @param string $flavorAssetId
  * @param string $referrer 64base encoded  
  * @return string $response
  * 
  */
 public function getLicenseAction($flavorAssetId, $referrer = null)
 {
     KalturaResponseCacher::disableCache();
     KalturaLog::debug('get license for flavor asset: ' . $flavorAssetId);
     try {
         $requestParams = requestUtils::getRequestParams();
         if (!array_key_exists(WidevineLicenseProxyUtils::ASSETID, $requestParams)) {
             KalturaLog::err('assetid is missing on the request');
             return WidevineLicenseProxyUtils::createErrorResponse(KalturaWidevineErrorCodes::WIDEVINE_ASSET_ID_CANNOT_BE_NULL, 0);
         }
         $wvAssetId = $requestParams[WidevineLicenseProxyUtils::ASSETID];
         $this->validateLicenseRequest($flavorAssetId, $wvAssetId, $referrer);
         $privileges = null;
         $isAdmin = false;
         if (kCurrentContext::$ks_object) {
             $privileges = kCurrentContext::$ks_object->getPrivileges();
             $isAdmin = kCurrentContext::$ks_object->isAdmin();
         }
         $response = WidevineLicenseProxyUtils::sendLicenseRequest($requestParams, $privileges, $isAdmin);
     } catch (KalturaWidevineLicenseProxyException $e) {
         KalturaLog::err($e);
         $response = WidevineLicenseProxyUtils::createErrorResponse($e->getWvErrorCode(), $wvAssetId);
     } catch (Exception $e) {
         KalturaLog::err($e);
         $response = WidevineLicenseProxyUtils::createErrorResponse(KalturaWidevineErrorCodes::GENERAL_ERROR, $wvAssetId);
     }
     WidevineLicenseProxyUtils::printLicenseResponseStatus($response);
     return $response;
 }