Hi, RB
Please read the Getting Started section in
http://code.google.com/p/google-file-service/.
2. Apache HttpClient
[Notice] Only allowed client IPs can upload files via Apache
HttpClient API. Change WEB-INF/appengine-web.xml if required.
Please modify <property name="upload.allowed-client-ip"
value="127.0.0.1, 140.109.16.68" /> in the appengine-web.xml.
-tytung