MarietjeDjango/marietje/marietje/context_processors.py

import ipaddress

from django.conf import settings

def _client_internal(request):
    """
    If the client is internal, we will allow to show more info

    A client is considered internal if:
      - Logged in
      - Accesses from a trusted IP range
    """
    if request.user.is_authenticated:
        return True

    remote_ip = ipaddress.ip_address(request.META['REMOTE_ADDR'])


    for ip_range in getattr(settings, 'TRUSTED_IP_RANGES', []):
        net = ipaddress.ip_network(ip_range)
        if remote_ip in net:
            return True

    return False


def global_settings(request):
    internal = _client_internal(request)
    contact_email = settings.CONTACT_EMAIL
    if not internal:
        contact_email = contact_email.replace('@', ' [at] ')
    return {
        'client_internal': internal,
        'issues_url': settings.ISSUES_URL,
        'contact_email': contact_email,
        'merge_requests_url': settings.MERGE_REQUESTS_URL
    }