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Flask · Module 7 of 10

Building REST APIs

Return JSON and design clean API endpoints.

📖 Key ideas

  1. Return dicts or jsonify(data) to send JSON.
  2. Use HTTP methods for CRUD: GET, POST, PUT/PATCH, DELETE.
  3. Return proper status codes and error JSON.
  4. abort(404) stops with an error; errorhandler customises it.
  5. Flask-CORS enables cross-origin calls from front-ends.
💡 Real-life example: An API is a menu for programs: each endpoint is a dish they can order.
jsonifyCreates a JSON response
abort()Stops with an HTTP error
errorhandlerCustom error responses
Flask-CORSAllows cross-origin requests