code: public function getContents($originUrl, $fileUrl, $progress = true, $options = array())
      {
          return $this->get($originUrl, $fileUrl, $options, null, $progress);
      }
docs: Get the content.
  
  @param string $originUrl The origin URL
  @param string $fileUrl   The file URL
  @param bool   $progress  Display the progression
  @param array  $options   Additional context options
  
  @return bool|string The content