string(232) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=u%E7%9B%98%E6%95%B0%E6%8D%AE%E6%81%A2%E5%A4%8D%E5%8E%9F%E7%90%86 => Failed to connect to 101.89.117.144 port 38208: Connection refused"
u盘数据恢复原理
