Python app deployment - what are WSGI and ASGI ?

[metalalive]

Q:
Why should I need web (HTTP) server and WSGI (or ASGI) server to get my python app up and running ?

A:
most of python web frameworks do NOT support internet app-layer protocol (HTTP) , they need common interface to properly convert messages from (and to) existing HTTP servers like Nginx , which are WSGI and its async version -- ASGI .

Check out the diagrams in the articles to get the big picture :

• Deployment - Full Stack Python
• ASGI vs. WSGI: Understanding Server Gateway Interfaces
• How Python's WSGI vs. ASGI is Like Baking a Cake

[metalalive]

Q:
what is Uvicorn and Hypercorn

A:
both are intermediate servers that supports ASGI (async server gateway interface) , so your python app (e.g. implemented with FastAPI) can send (receive) message through the interface to (from) HTTP server

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Q:
How much should I know about it as a app developer ?

A:

• usage of the ASGI server
• how to start the ASGI and http server, with your python app
• and start testing, that should be sufficient for app dev.
• there is no need to figure out how ASGI works under the hood.