string(230) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8D%8E%E4%B8%BA%E5%85%AC%E5%8F%B8%E5%88%9B%E6%96%B0%E7%9A%84%E4%BE%8B%E5%AD%90 => Received HTTP code 403 from proxy after CONNECT"
华为公司创新的例子
