title: Possible to request gsessionid without a 302 response
body: <p>I'm writing a google gdata API client in Flash/AS2 (sadly, moving to AS3 is not an option at this time).  Logging in via ClientLogin works fine but subquent requests will return a 302 redirect that includes a gsessionid I am supposed to include with future requests to avoid the 302s.  </p>
  
  <p>Flash/AS2, AFAIK, does not allow me to actually query an http error response body in any way, so there's no way for me to actually see this gsessionid after the 302 is returned.   Is there a gdata api call which will return me a valid gsessionid inside an HTTP 200 response if I already have a valid GoogleLogin auth token, or is this not possible without a man-in-the-middle proxy?</p>