Django 4.1 Custom Middleware Not Capturing Response Time Correctly
I'm trying to debug I'm integrating two systems and I've looked through the documentation and I'm still confused about I'm trying to implement a custom middleware in my Django 4.1 project to log the response time of each request, but I'm working with some unexpected behavior... My middleware is not correctly calculating the response time and sometimes even logs a negative time. Here’s the middleware code I’ve written: ```python import time from django.utils.deprecation import MiddlewareMixin class ResponseTimeMiddleware(MiddlewareMixin): def process_request(self, request): request.start_time = time.time() def process_response(self, request, response): if hasattr(request, 'start_time'): duration = time.time() - request.start_time print(f'Response time: {duration:.2f} seconds') return response ``` I've added this middleware to my `MIDDLEWARE` settings in `settings.py` like so: ```python MIDDLEWARE = [ 'django.middleware.security.SecurityMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', # ... other middleware ... 'myapp.middleware.ResponseTimeMiddleware', ] ``` However, when I make requests to my API endpoints, I sometimes see logs like `Response time: -0.01 seconds`, which is clearly incorrect. I've tried placing print statements before and after the time calculation to debug but didn’t find any issues with the flow of execution. I also verified that no other middleware is conflicting with this one, and I have no asynchronous views that could affect this. Is there something I’m overlooking in the middleware implementation? How can I ensure accurate logging of response times? Any insights would be greatly appreciated! For context: I'm using Python on macOS. Is there a better approach? Is this even possible? This is for a web app running on CentOS. How would you solve this?