string(231) "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%E4%B9%A6%E5%BA%97%E7%9A%84%E4%BB%A3%E7%A0%81 => Failed to connect to 101.89.159.206 port 38187: Connection refused"
网上书店的代码
