string(230) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%8C%E5%BB%BA%E7%9A%84%E7%9F%A5%E8%AF%86%E7%82%B9%E6%80%8E%E4%B9%88%E8%AE%B0 => Received HTTP code 403 from proxy after CONNECT"
二建的知识点怎么记
