string(226) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%BA%E4%BB%80%E4%B9%88%E4%BC%A0b%E7%AB%99%E5%90%8E%E5%8F%AA%E6%9C%89480p => Received HTTP code 403 from proxy after CONNECT"
为什么传b站后只有480p
