Google OAuth2 authentication using python-social-auth on Google App Engine failed

Question

I have an issue with python-social-auth for Google OAuth2 authentication. I'm developing project using django 1.7 and deploying it to Google App Engine.

I tested login by google using oauth2 with python-social-auth on my local environment(Ubuntu, django1.7, virtualenv, python-social-auth) Of course, I got API credentials from "API and auth" console.

I deployed project to Google app engine. If I click "login by google", it redirects to page which requires user to input his password. After that it shows me error like "AuthFailed at /complete/google-oauth2/ Authentication failed: ('Connection aborted.', error(13, 'Permission denied'))"

Debug message shows me that "request_access_token" generate above issue.

But the point is it works well on local testing without any issue.

Any kind of help would much appreciated.

Answer 1

Downgrading requests module to 2.3 worked for me:

pip uninstall requests        # 2.5.1, then
pip install requests==2.3

Thanks to this Answer