golang/oauth2 — pull request #42 by gmlewis (2014-10-03 05:47:23+00:00)
Title: Locally cache oauth tokens.

This change is for both App Engine and Managed VMs so that these apps can scale without running into the app_identity_service quota limit due to calling appengine.AccessToken too frequently. An added benefit of caching is that calls to Google APIs will be significantly sped up due to removing the round-trip calls to the api_identity_service.