App Engine Login Redirect Fails
问题 On March 1, 2011 App Engine changed its login flow, breaking my app (see the Google Groups message). This issue also came up in this Stack Overflow question. The suggested answers are "have the app perform the redirect. That is, createLoginUrl only works when the continue url is a url for the app. If you need the user to be sent to another app/host after login, then your app needs to do that redirect" and "set up a redirect handler on your own app. Make that the target of the continue