string(239) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%96%B9%E5%BC%8F%E6%96%B9%E6%B3%95%E4%B8%8A%E5%AD%98%E5%9C%A8%E7%9A%84%E9%97%AE%E9%A2%98 => Received HTTP code 403 from proxy after CONNECT"
方式方法上存在的问题
