boards/middlewares.py

import pytz

from django.shortcuts import redirect
from django.utils import timezone
from django.utils.deprecation import MiddlewareMixin

from boards import utils
from boards.models import Ban

PATH_BANNED = '/banned/'

SESSION_TIMEZONE = 'django_timezone'

RESPONSE_CONTENT_TYPE = 'Content-Type'

TYPE_HTML = 'text/html'


class BanMiddleware(MiddlewareMixin):
    """
    This is run before showing the thread. Banned users don't need to see
    anything
    """
    def process_request(self, request):
        if request.path != PATH_BANNED:
            ip = utils.get_client_ip(request)
            try:
                ban = Ban.objects.get(ip=ip)

                if not ban.can_read:
                    return redirect('banned')
            except Ban.DoesNotExist:
                pass


class TimezoneMiddleware(MiddlewareMixin):
    def process_request(self, request):
        tzname = request.session.get(SESSION_TIMEZONE)
        if tzname:
            timezone.activate(pytz.timezone(tzname))
        else:
            timezone.deactivate()