This sample demonstrates how to expose a Flask app as a single Cloud Function. The Flask app provides a simple CRUD interface for "widgets" stored in the Realtime Database.

See file functions/main.py for the code.

The sample creates a Flask app and defines two routes:

• GET /widgets and GET /widgets/<id>: These routes retrieve a list of all widgets or a single widget by its ID from the Realtime Database.
• POST /widgets: This route adds a new widget to the Realtime Database.

The entire Flask app is then exposed as a single Cloud Function called httpsflaskexample using @https_fn.on_request().

The httpsflaskexample function is triggered by an HTTP request.

To deploy and test the sample:

1. Create a Firebase project on the Firebase Console.
2. Get the code, for instance using git clone https://github.com/firebase/functions-samples
3. Enter the correct directory cd functions-samples/Python/http-flask
4. Set up the CLI to use your Firebase project using firebase use --add and select your Firebase project.
5. Deploy your project's code using firebase deploy.
6. Use a tool like curl to test the function:
   • Add a widget: curl -X POST -d "My new widget" https://us-central1-YOUR_PROJECT_ID.cloudfunctions.net/httpsflaskexample/widgets
   • Get all widgets: curl https://us-central1-YOUR_PROJECT_ID.cloudfunctions.net/httpsflaskexample/widgets
   • Get a specific widget: curl https://us-central1-YOUR_PROJECT_ID.cloudfunctions.net/httpsflaskexample/widgets/WIDGET_ID