75 lines
2.8 KiB
Python
75 lines
2.8 KiB
Python
# -*- coding: utf-8 -*-
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"""
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context processors for injecting some settings into the template context and
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also for keeping the IP addrs in the session fresh.
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"""
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import logging
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logger = logging.getLogger(__name__)
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import time
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from .main.dnstools import put_ip_into_session
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from .main.iptools import normalize_ip
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from django.conf import settings
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from django.db import OperationalError
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MAX_IP_AGE = 180 # seconds
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def add_settings(request):
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context = {}
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context['WWW_HOST'] = settings.WWW_HOST
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context['WWW_IPV4_HOST'] = settings.WWW_IPV4_HOST
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context['WWW_IPV6_HOST'] = settings.WWW_IPV6_HOST
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context['SERVICE_CONTACT'] = settings.SERVICE_CONTACT # about view
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context['WE_HAVE_TLS'] = settings.WE_HAVE_TLS
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context['COOKIE_SECURE'] = settings.SESSION_COOKIE_SECURE or settings.CSRF_COOKIE_SECURE
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return context
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def update_ips(request):
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"""
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Update the IPs in the session using REMOTE_ADDR.
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Check the session if there are stale IPs and if so, remove them.
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"""
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# XXX is a context processor is the right place for this?
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s = request.session
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t_now = int(time.time())
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# update and keep fresh using info from the request we have anyway:
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ipaddr = normalize_ip(request.META['REMOTE_ADDR'])
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put_ip_into_session(s, ipaddr, max_age=MAX_IP_AGE / 2)
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# remove stale data to not show outdated IPs (e.g. after losing IPv6 connectivity):
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for key in ['ipv4', 'ipv6', ]:
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timestamp_key = "%s_timestamp" % key
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try:
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timestamp = s[timestamp_key]
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except KeyError:
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# should be always there, initialize it:
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put_ip_into_session(s, '', kind=key)
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else:
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try:
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stale = timestamp + MAX_IP_AGE < t_now
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except (ValueError, TypeError):
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# invalid timestamp in session
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put_ip_into_session(s, '', kind=key)
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else:
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if stale:
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logger.debug("ts: %s now: %s - killing stale %s (was: %s)" % (timestamp, t_now, key, s[key]))
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# kill the IP, it is not up-to-date any more
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# note: it is used to fill form fields, so set it to empty string
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put_ip_into_session(s, '', kind=key)
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if s.session_key is None:
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# if we have a new session (== not loaded from database / storage), we
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# MUST save it here to create its session_key as the base.html template
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# uses .session_key to build the URL for detectip:
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try:
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s.save()
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except OperationalError:
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# if e.g. the database is locked (sqlite), do not blow up here,
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# because it gives rather ugly tracebacks in the email even if django
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# was just rendering the 404 template for the current request, see #356.
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pass
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return {}
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