Still building initial conversions

sqrl/management/commands/__init__.py

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+# -*- coding: utf-8 -*-
+from __future__ import print_function, unicode_literals

sqrl/management/commands/clearsqrlnuts.py

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+# -*- coding: utf-8 -*-
+from datetime import timedelta
+
+from django.conf import settings
+from django.core.management.base import BaseCommand
+from django.utils.timezone import now
+
+from sqrl.models import SQRLNut
+
+
+class Command(BaseCommand):
+    help = ('Clears expired SQRL nuts. '
+            'This command should be used as a cron job. '
+            'The recommended execution frequency is 5 minutes '
+            'which will result in longest nut lifespan of 10 minutes.')
+
+    def handle(self, *args, **options):
+        ttl = getattr(settings, 'SQRL', {}).get('TTL', 60 * 5)  # 5 minutes
+        delete_before = now() + timedelta(seconds=-ttl)
+
+        SQRLNut.objects.filter(timestamp__lt=delete_before).delete()