string(242) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=ipad%E5%A6%82%E4%BD%95%E6%B8%85%E7%90%86%E7%BC%93%E5%AD%98%E5%AE%B9%E9%87%8F => Failed to connect to 61.171.74.35 port 38041: Connection refused"
ipad如何清理缓存容量
