if quality:
info_url += '&hd' + quality
xml_data = self._download_xml(info_url, video_id, 'Opening the info XML page')
+ error = xml_data.attrib.get('error')
+ if error is not None:
+ raise ExtractorError('Tudou said: %s' % error, expected=True)
final_url = xml_data.text
return final_url