Log structured data about events that happen in your system (in JSON format for maximum flexibility).

00_logging.py

# 00 prepended to filename so this shows up first in the list of gists.

import socket
import time

import simplejson

from django.conf import settings

def log_event(logger, event, request=None, data=None,
    # Hostname and flavor like this for performance hack
    _hostname=socket.gethostname(), _flavor=settings.FLAVOR):
    if not data:
        data = {}
    data.update({
        'event': event,
        'ts': time.time(),
        'hostname': _hostname,
        'flavor': _flavor,
    })
    has_session = getattr(request, 'session', None)
    if request and has_session and request.user.is_authenticated():
        data.update({
            'user_id': request.user.id,
            'username': request.user.username,
        })
    logger.info(simplejson.dumps(data))

example_middleware.py

import logging
import time

from django_ext.logging import log_event

logger = logging.getLogger(__name__)

class LoggingMiddleware(object):
    
    def process_request(self, request):
        request._start_time = time.time()

    def process_response(self, request, response):
        elapsed = time.time() - request._start_time
        log_event(logger, 'webrequest', request, {
            'method': request.method,
            'url': request.build_absolute_uri(),
            'elapsed': elapsed,
            'user_agent': request.META.get('HTTP_USER_AGENT'),
            'client_ip': request.META.get('REMOTE_ADDR'),
            'response_size': len(response.content),
            'response_status': response.status_code,
        })
        return response