52 lines
1.6 KiB
Python
52 lines
1.6 KiB
Python
# -*- coding: utf-8 -*-
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import logging
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logger = logging.getLogger(__name__)
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from datetime import timedelta
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from django.conf import settings
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from django.utils.timezone import now
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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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return context
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def remove_stale_ips(request):
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"""
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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 = now()
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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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s[key] = ''
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s[timestamp_key] = t_now
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else:
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try:
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stale = timestamp + timedelta(seconds=MAX_IP_AGE) < t_now
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except (ValueError, TypeError):
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# invalid timestamp in session
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del s[timestamp_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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s[key] = ''
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# update the timestamp, so we can retry after a while
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s[timestamp_key] = t_now
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return {}
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