string(260) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=ps%E4%B8%B4%E6%97%B6%E5%AD%98%E5%82%A8%E7%9A%84%E6%96%87%E4%BB%B6%E5%9C%A8%E5%93%AA%E9%87%8C => Failed to connect to 101.89.166.210 port 38089: Connection refused"
ps临时存储的文件在哪里
