string(284) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%91%E6%9C%8D%E5%8A%A1%E5%99%A8%E4%B9%9F%E6%98%AF%E7%89%A9%E7%90%86%E6%9C%BA%E8%99%9A%E6%8B%9F%E5%87%BA%E6%9D%A5%E7%9A%84%E5%98%9B => Received HTTP code 403 from proxy after CONNECT"
云服务器也是物理机虚拟出来的嘛
