Implementing shared functionality using Middleware
summary
Shows concrete code and interoperable patterns: Flask uses before_request/after_request decorators, Django supports class and function middleware with ordering controlled in settings, and FastAPI exposes add_middleware for async ASGI classes. Demonstrates a working wrapping technique that turns WSGI/ASGI apps into framework-agnostic middleware, uses an OpenTelemetry WSGI middleware example, and shows embedding a Flask app inside Django and caching middleware for FastAPI so functionality actually runs and returns responses.
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chapters (14)
- 0:00Start
- 1:58Flask middleware
- 3:40Multiple middleware in Flask
- 7:55Activate middleware
- 9:25Recap
- 14:00Open Telemetry WSGI Middleware
- 16:30Middleware for wrapping another WSGI application
- 16:54Wrapper Middleware
- 19:17A FastAPI application
- 19:37Using ASGI Middleware
- 20:52Adding the Middleware
- 22:40Integrate a WSGI application
- 23:19WSGIMiddleware Implementation
- 23:52Key takeaways
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