The Functions Framework is an open-source framework designed for writing portable functions that can run in serverless environments. It's created by the Google Cloud Functions team. These lightweight functions can handle HTTP requests or CloudEvents in a Functions as a Service (FaaS) programming style. The framework supports multiple languages, including Python, Node.js, Go, Java, PHP and Ruby.
Key features include the ability to define named functions, invoke functions in response to requests, automatically unmarshal CloudEvents, and convert legacy events from Google Cloud services. It also allows for spinning up a local development server for testing and integrates with standard libraries for each supported language. Functions written to this framework can run in various environments, such as Google Cloud Functions, Google Cloud Run, Knative-based environments, and local development machines. The Functions Framework is available on GitHub under the Apache 2.0 license.
While the Functions Framework itself is open source and doesn't have a direct price, using it with services like Google Cloud Functions or Cloud Run will incur costs based on the pricing models of those services. These costs are calculated based on factors such as invocations, compute time, memory usage, and networking. There is a free tier available, offering a certain amount of free invocations, compute time, and memory usage per month.
