Making it easier to use the google-auth library in App Engine

I had to jump through a number of hoops to get the requests transport working in the App Engine environment:

1. Enable billing for the project
2. Vendor in the requests-toolbelt library and enable the monkeypatch (as documented here)
3. Add the ssl library to the app.yaml:

libraries:
- name: ssl
  version: latest

1. Enable sockets as documented here

Only by doing all the above, that I could get the HTTPS request to Google OAuth2 token servers working. Is this to be expected? Is there anything that can be done to make using this library in App Engine easier?

[hiranya911]

Yes, I have the following in appengine_config.py:

from google.appengine.ext import vendor

vendor.add('lib')

I managed to resolve the module loading issue by using the following instead:

# appengine_config.py
import os
import google
from google.appengine.ext import vendor

lib_directory = os.path.dirname(__file__) + '/lib'

# Change where to find the google package (point to the lib/ directory)
google.__path__ = [os.path.join(lib_directory, 'google')] + google.__path__

# Add any libraries install in the "lib" folder.
vendor.add(lib_directory)

It would be nice if I could avoid having to do this though.

[jc275]

I had the same ImportError with google.auth on dev_appserver as @hiranya911, whose workaround also fixed it for me.

@jonparrott Regarding the google.__path__ manipulations, I noticed that the following line was indeed necessary

google.__path__ = [os.path.join(lib_directory, 'google')] + google.__path__

whilst the following alternative didn’t solve the problem

google.__path__ = google.__path__ + [os.path.join(lib_directory, 'google')]