/**
  * @return array
  */
 private function getHttpHeader()
 {
     return array(sprintf('User-Agent: %s', $this->configuration->getUserAgent()), sprintf('Referer: %s', $this->configuration->getBaseUrl()), sprintf('Accept-Language: %s,en-US;q=0.7,en;q=0.3', $this->configuration->getLanguage()), 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', 'Connection: keep-alive', 'Cache-Control: max-age=0');
 }