Moderate Middleware Question 108 of 228

How do you write custom middleware in current Django?

Python & Django · Speak this in 60–90 seconds · Faridabad & Delhi NCR

PICTURE THIS: DJANGO MVT

URLRoute request

ViewBusiness logic

Model + TemplateData + HTML

Simple meaning

Define a class that takes get_response in __init__ and in __call__ runs pre-logic, calls get_response(request), then post-logic.

WHY — Middleware instead of guessing?

Why interviewers care about Middleware:

This is a process

question about Middleware.

Panels listen for order,

trade-offs, and what you would actually do on a Python project - not buzzwords.

Stay structured

Name the idea, why it exists, then one short example.

Close cleanly

End with when you use it and one common pitfall.

STEPS — What happens step by step?

Before you speak the answer, walk the interviewer through these steps:

1
Define a class that
takes get_response in __init__ and in __call__ runs pre-logic, calls get_response(request), then post-logic.
2
Return the response object,
and do not forget to handle streaming responses if you wrap content.
3
Add the class path
to MIDDLEWARE in the correct position.
4
Give an example
One tiny concrete case you can say aloud.
5
Common mistake
What juniors usually get wrong.
6
Close
When you pick this over the alternative.

EXAMPLE — See it in action

Here's a short line you can speak, broken into clear beats:

Say this line

“Return the response object, and do not forget to handle streaming responses if y”

Break into beats

Returntheresponseobjectanddo

Speaking order

2987408337471632900

Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.

Key takeaway

Define a class that takes get_response in __init__ and in __call__ runs pre-logic, calls get_response(request), then post-logic. Return the response object, and do not forget to handle streaming responses if you wrap content.