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Canvas LTI integration with Google App Engine app?

Question asked by Stephen Wong on Jul 12, 2015
Latest reply on Jun 23, 2018 by Stuart Ryan

Has anyone attempted to do an LTI integration with a Google App Engine (GAE) web service?    The libraries from Google, particularly the OAuth2Decorator class and its support library, assume that the user is logged into Google, which is not the case for most institutional Canvas users.   After much frustrating work, I've been able to get the initial OAuth2 authorization to work without requiring a Google login but I am currently stymied at being able to get the GAE app to submit an assignment on behalf of the Canvas user.    


Any advice or shared experiences would be most welcome!