The following code defines an entity with a workflow which makes web requests, automatically refreshing with an OAuth token if the error message indicates that it should, and using backoff/retry strategies.
The blueprint assumes that a Google App requiring OAuth is set up. This is easy done at Google, or the code should be straightforward to adapt for any other OAuth-based site. The blueprint expects the following three values from an externalized config provider called google-oauth:
google_client_id - the client ID for the Google App (created when the App is created there)google_client_secret - the client secret for the Google App (created when the App is created there)google_refresh_token - a refersh token acquired for the app for a logged in user; because this interaction is intended to be automated, it expects to be configured with a valid refresh token (rather than redirect a user to a webpage); this is not a token for accessing the API directly, but for acquiring a token to do so, and can be retrieved by interacting with the OAuth API ahead of time or by inspecting the traffic for a UI-based log-inThe blueprint is as follows:
{% highlight yaml %} {% readj oauth.yaml %} {% endhighlight %}