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from django.conf import settings
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 responsewith an x-view
header indicating the view function. This is used to lookup the view
function for an arbitrary page.
"""
assert hasattr(request, 'user'), (
"The XView middleware requires authentication middleware to be "
"installed. Edit your MIDDLEWARE%s setting to insert "
"'django.contrib.auth.middleware.AuthenticationMiddleware'." % (
"_CLASSES" if settings.MIDDLEWARE is None else ""
)
)
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['X-View'] = get_view_name(view_func)
return response
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