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from django.conf import settings
from django.core.exceptions import ImproperlyConfigured
from django.http import HttpResponse
from django.utils.deprecation import MiddlewareMixin
from .utils import get_view_name
class XViewMiddleware(MiddlewareMixin):
"""
Add an X-View header to internal HEAD requests.
"""
def process_view(self, request, view_func, view_args, view_kwargs):
"""
If the request method is HEAD and either the IP is internal or the
user is a logged-in staff member, return a response with an x-view
header indicating the view function. This is used to lookup the view
function for an arbitrary page.
"""
if not hasattr(request, "user"):
raise ImproperlyConfigured(
"The XView middleware requires authentication middleware to "
"be installed. Edit your MIDDLEWARE setting to insert "
"'django.contrib.auth.middleware.AuthenticationMiddleware'."
)
if request.method == "HEAD" and (
request.META.get("REMOTE_ADDR") in settings.INTERNAL_IPS
or (request.user.is_active and request.user.is_staff)
):
response = HttpResponse()
response.headers["X-View"] = get_view_name(view_func)
return response