How do I use Google Storage in Flask?

Question

The example code makes use of this oauth2_client which it immediately locks. The script does not work without these lines. What's the correct way to integrate this into a Flask app? Do I have to manage these locks? Does it matter if my web server spawns multiple threads? Or if I'm using gunicorn+gevent? Is there documentation on this anywhere?

Answer 1

It's not actually locking, it's just instantiating a lock object inside the module. The lock is actually acquired/released internally by oauth2_client; you don't need to manage it yourself. You can see this by looking at the source code, here: https://github.com/GoogleCloudPlatform/gsutil/blob/master/gslib/third_party/oauth2_plugin/oauth2_client.py

In fact, based on the source code linked above, you should be able to simply call oauth2_client.InitializeMultiprocessingVariables() instead of the try/except block, since that is ultimately doing almost the exact same thing.