ArchiveBox/archivebox/core/middleware.py

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__package__ = 'archivebox.core'
import ipaddress
from django.utils import timezone
from django.contrib.auth.middleware import RemoteUserMiddleware
from django.core.exceptions import ImproperlyConfigured
from ..config import PUBLIC_SNAPSHOTS, REVERSE_PROXY_USER_HEADER, REVERSE_PROXY_WHITELIST
def detect_timezone(request, activate: bool=True):
gmt_offset = (request.COOKIES.get('GMT_OFFSET') or '').strip()
tz = None
if gmt_offset.replace('-', '').isdigit():
tz = timezone.get_fixed_timezone(int(gmt_offset))
if activate:
timezone.activate(tz)
# print('GMT_OFFSET', gmt_offset, tz)
return tz
def TimezoneMiddleware(get_response):
def middleware(request):
detect_timezone(request, activate=True)
return get_response(request)
return middleware
def CacheControlMiddleware(get_response):
def middleware(request):
response = get_response(request)
if '/archive/' in request.path or '/static/' in request.path:
policy = 'public' if PUBLIC_SNAPSHOTS else 'private'
response['Cache-Control'] = f'{policy}, max-age=60, stale-while-revalidate=300'
# print('Set Cache-Control header to', response['Cache-Control'])
return response
return middleware
class ReverseProxyAuthMiddleware(RemoteUserMiddleware):
header = 'HTTP_{normalized}'.format(normalized=REVERSE_PROXY_USER_HEADER.replace('-', '_').upper())
def process_request(self, request):
if REVERSE_PROXY_WHITELIST == '':
return
ip = request.META.get('REMOTE_ADDR')
for cidr in REVERSE_PROXY_WHITELIST.split(','):
try:
network = ipaddress.ip_network(cidr)
except ValueError:
raise ImproperlyConfigured(
"The REVERSE_PROXY_WHITELIST config paramater is in invalid format, or "
"contains invalid CIDR. Correct format is a coma-separated list of IPv4/IPv6 CIDRs.")
if ipaddress.ip_address(ip) in network:
return super().process_request(request)