SmartGWT to follow a 302 redirect

[Sytematic]

Hello,

I would like to know if it is possible to follow a http 302 redirect from a servlet, ie.:

//servlet
response.sendRedirect("http://some_external_site");

(I ask this, because I want to build an Google Drive app, based on SmartGWT. This means redirecting now and then to grant access to documents etc. Alternatively I have to rewrite their example code to send auth urls down to the client, and redirect from there, but that would mean a bit more work.)

I call my servlet using an RPCRequest:

RPCRequest req = new RPCRequest();
...
RPCManager.sendRequest(req, myCallback);

I am looking for a general direction to go in this matter.

TIA.