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Webhooks are an increasingly popular concept that many API providers use to invert the usual pull-based, polling client model.
Webhooks allow clients to register to receive pre-defined events over standard HTTP requests.
This book will show you a straightforward, robust architecture for building a webhook consumer using Rails.
When you've finished reading, you'll know how to implement and test a client capable of managing webhook subscriptions and process hooks as they are sent to your app.