string(284) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BD%91%E7%BB%9C%E6%8E%A8%E5%B9%BF%E7%9A%84%E6%96%B9%E5%BC%8F%E5%8C%85%E6%8B%AC%E4%BB%A5%E4%B8%8B%E5%87%A0%E7%A7%8D%E6%96%B9%E6%B3%95 => Received HTTP code 403 from proxy after CONNECT"
网络推广的方式包括以下几种方法
