Django Middleware to track request time to Mixpanel

RequestTimeTrackingMiddleware.py

import datetime
import uuid

from django.conf import settings

from mixpanel import Mixpanel
from mixpanel_async import AsyncBufferedConsumer

mp = Mixpanel(settings.MIXPANEL_API_TOKEN, consumer=AsyncBufferedConsumer())


class RequestTimeTrackingMiddleware(object):
    """Middleware class tracking request time to Mixpanel.

    This class can be used to measure time of request processing
    within Django.

    Static method `track_request' may be used independently of the
    middleware itself, outside of it, and even when middleware is not
    listed in MIDDLEWARE_CLASSES.

    Based on https://djangosnippets.org/snippets/1826/
    """

    @staticmethod
    def track_request(request):
        """Track request time to Mixpanel

        Tracks time to complete a request to Mixpanel

        Sends the following to Mixpanel
        - distinct_id is the authenticated user's email or 'Anonymous'
        - id is the UUID identifying request
        - path is the full request path
        - duration is the duration of the request in milliseconds
        - environment is development if DEBUG is True, production otherwise
        """

        distinct_id = 'Anonymous'
        if hasattr(request, 'user') and request.user.is_authenticated():
            distinct_id = request.user.email

        dt = datetime.datetime.utcnow()
        if not hasattr(request, '_logging_uuid'):
            request._logging_uuid = uuid.uuid1()
            request._logging_start_dt = dt
        else:
            delta = int((dt - request._logging_start_dt).total_seconds() * 1000)
            mp.track(distinct_id, 'Request', {
                'id': str(request._logging_uuid),
                'path': request.get_full_path(),
                'duration (milliseconds)': delta,
                'environment': 'development' if settings.DEBUG else 'production'
            })

    def process_request(self, request):
        self.track_request(request)

    def process_response(self, request, response):
        s = getattr(response, 'status_code', 0)
        r = str(s)
        if s in (300, 301, 302, 307):
            r += ' => %s' % response.get('Location', '?')
        elif response.content:
            r += ' (%db)' % len(response.content)
        self.track_request(request)
        return response