string(234) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%A6%82%E4%BD%95%E6%B8%85%E7%90%86ipad%E7%9A%84%E5%86%85%E5%AD%98%E7%A9%BA%E9%97%B4 => Received HTTP code 403 from proxy after CONNECT"
如何清理ipad的内存空间
