string(233) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cad%E6%89%93%E5%BC%80%E5%90%8E%E6%97%A0%E5%93%8D%E5%BA%94%E6%80%8E%E4%B9%88%E5%8A%9E => Received HTTP code 403 from proxy after CONNECT"
cad打开后无响应怎么办
