string(275) "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%E5%8A%9F%E8%83%BD%E6%A8%A1%E5%9D%97%E6%9C%89%E5%93%AA%E4%BA%9B => Failed to connect to 101.91.112.32 port 38195: Connection refused"
网上书店的功能模块有哪些
