Auth2.0 setup failure: curl: (6) Could not resolve host: www.googleapis.com

[denven]

sh /tmp/sd/yi-hack/gdrive/GDriveConf

Phenomenon
My google drive api requests all failed on my device today, no response at all;
I didn't figure out the reason; so I tried to use this script to setup google drive credentials for another time.

When I come to the auth2.0 setup:

Put this link into your browser:
https://accounts.google.com/o/oauth2/v2/auth?scope=https://www.googleapis.com/auth/drive&state=state&redirect_uri=urn:ietf:wg:oauth:2.0:oob&response_type=code&client_id=295424722600-8jssdfsfsdfsdooiwoewlljk.apps.googleusercontent.com&access_type=offline

Copy and paste your code here:
4/1AY0e-g58RXEY6cH4Df1QWJMiCNKYvVeKdPW9ijbGZ17SkFEA6X0mFnX39xH0
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0curl: (6) Could not resolve host: www.googleapis.com

Analysis:
ping 8.8.8.8 is reachable, but ping any valid domain is not working, returns bad address.

The reboot cannot fix this.

Some people said that the problem is with busybox

Memo:
Just put a record here, I may need to reset the network of my device, if anyone or I find a fix, please reply it here.
Thanks.