51 lines
2.1 KiB
Python
51 lines
2.1 KiB
Python
# hobo - portal to configure and deploy applications
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# Copyright (C) 2015-2022 Entr'ouvert
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#
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# This program is free software: you can redistribute it and/or modify it
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# under the terms of the GNU Affero General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import dns.exception
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import dns.resolver
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from django.conf import settings
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from django.http import HttpResponse
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from django.utils.translation import ugettext as _
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def pass_through(remote_addr):
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pass_through_ips = getattr(settings, 'MAINTENANCE_PASS_THROUGH_IPS', [])
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if remote_addr in pass_through_ips:
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return True
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pass_through_ddns = getattr(settings, 'MAINTENANCE_PASS_THROUGH_DDNS', None)
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if pass_through_ddns:
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domain = '.'.join(reversed(remote_addr.split('.'))) + '.' + pass_through_ddns
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try:
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answers = dns.resolver.query(domain, 'A', lifetime=1)
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return any(answer.address for answer in answers)
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except (dns.resolver.NXDOMAIN, dns.resolver.NoAnswer, dns.exception.DNSException):
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return False
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return False
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class MaintenanceMiddleware:
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def __init__(self, get_response):
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self.get_response = get_response
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def __call__(self, request):
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maintenance_mode = getattr(settings, 'MAINTENANCE_MODE', None)
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if maintenance_mode:
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remote_addr = request.META.get('REMOTE_ADDR')
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if not (remote_addr and pass_through(remote_addr)):
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maintenance_msg = _('The site is under maintenance')
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return HttpResponse('<h1>%s</h1>' % maintenance_msg, status=503)
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return self.get_response(request)
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