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18 / 30Django Middleware and Request ProcessingMediumPython - Django Framework

Scenario: Hari's Request Timing Middleware

import time

class TimingMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        start_time = time.time()
        response = self.get_response(request)
        duration = time.time() - start_time
        response['X-Process-Time'] = str(duration)
        return response

  1. The middleware will fail because you cannot modify response headers after get_response() is called

  2. The middleware correctly measures request processing time and adds it to response headers

  3. The timing will be inaccurate because it doesn't account for middleware execution time

  4. This middleware cannot measure response time without implementing process_response()

Show answer & explanation

Correct answer

The middleware correctly measures request processing time and adds it to response headers

Explanation

This middleware measures the time taken to process a request by capturing the time before and after calling get_response(), then adds this information to the response headers.

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All 30 Django Middleware and Request Processing questions

  1. 1.What is the primary purpose of Django Middleware?
  2. 2.In which setting in Django is middleware configured?
  3. 3.What is the order of execution for middleware methods during request processing?
  4. 4.Which middleware method is called when an exception occurs in a view?
  5. 5.What does returning a response object from process_request() do?
  6. 6.Which built-in Django middleware handles Cross-Site Request Forgery (CSRF) protection?
  7. 7.What is the purpose of the SessionMiddleware in Django?
  8. 8.What does the CommonMiddleware middleware do?
  9. 9.In Django middleware, what does returning None from process_request() indicate?
  10. 10.Which middleware is responsible for adding User object to the request?
  11. 11.Understanding Django Middleware Execution Order
  12. 12.Middleware Methods and Request Processing Flow
  13. 13.Scenario:
  14. 14.Understanding process_exception() Middleware Method
  15. 15.Coding:
  16. 16.Scenario:
  17. 17.Understanding Middleware Short-Circuiting with Early Response
  18. 18.Scenario:
  19. 19.Understanding Middleware Exception Handling
  20. 20.Scenario:
  21. 21.Middleware Execution Order and Request Processing Pipeline
  22. 22.Custom Middleware Implementation for Request Logging
  23. 23.Exception Handling in Django Middleware
  24. 24.Request/Response Modification in Middleware - Hari's Scenario
  25. 25.Middleware Short-Circuiting and Early Response - Prasath's Scenario
  26. 26.CORS Middleware Implementation
  27. 27.Conditional Middleware Processing Based on URL Pattern
  28. 28.Middleware and Template Context Processing
  29. 29.Database Connection Management in Middleware
  30. 30.Middleware Initialization with Settings - Hari's Configuration Scenario