string(283) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%80%8E%E4%B9%88%E6%94%B6%E9%9B%86%E5%A4%A7%E6%95%B0%E6%8D%AE%E4%BF%A1%E6%81%AF%E7%9A%84%E6%96%B9%E6%B3%95%E5%91%A2 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
怎么收集大数据信息的方法呢
