code: public function getSignUrlByUrl($sessionId = null, $url = '/', $noSignQuery = array(), $method = 'GET', $query = array(), $headers = array(), $authClassName = null)
      {
          return $this->getAuthSign()->getSignUrlByUrl($sessionId, $url, $noSignQuery, $method, $query, $headers, $authClassName);
      }
docs: 对url进行签名
  @param null $sessionId
  @param string $url
  @param array $noSignQuery
  @param string $method
  @param array $query
  @param array $headers
  @param null $authClassName
  @return string