django_middleware_example.py

class TermsEnforcerMiddleware:
    """Django Middleware (add to MIDDLEWARE) to enforce users to sign the terms"""

    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        response = self.get_response(request)

        # only relevant for logged in users
        if not request.user.is_authenticated:
            return response

        path = request.path

        # pages to not redirect on (no recursion please!)
        path = path.strip('/')
        if path in 'logout terms privacy'.split():
            return response

        # if no consent get one before giving access to the site
        # assumes One-to-One User-Profile model
        if not request.user.profile.accepts_terms:
            return redirect('terms')

        return response