string(242) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cad%E4%B8%80%E6%89%93%E5%BC%80%E5%9B%BE%E7%BA%B8%E5%B0%B1%E8%87%B4%E5%91%BD%E9%94%99%E8%AF%AF => Received HTTP code 403 from proxy after CONNECT"
cad一打开图纸就致命错误
