The documentation for Google App Engine Federated IDs states:
WARNING: at the time of this writing, OpenID is not supported if your app runs in secure mode using HTTPS.
I am just checking to see if this is still the case. The bug seems to be related to Issue 3586, which remains unresolved.
There is a similar question, but it has not been updated in two years: Secure remote_api in app engine with OpenID.
If I understand correctly, this issues means that one cannot use OpenIDs with Google App Engine if your app requires SSL. Do I understand correctly? Are there any workarounds (e.g. Janrain's RPX)?