string(230) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BD%91%E4%B8%8A%E9%94%80%E5%94%AE%E7%9A%84%E5%B7%A5%E4%BD%9C%E5%86%85%E5%AE%B9 => Received HTTP code 403 from proxy after CONNECT"
网上销售的工作内容
