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64 lines
2.0 KiB
Python
64 lines
2.0 KiB
Python
from __future__ import absolute_import
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import hashlib
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import logging
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import traceback
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from datetime import datetime, timedelta
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from zerver.lib.str_utils import force_bytes
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# Adapted http://djangosnippets.org/snippets/2242/ by user s29 (October 25, 2010)
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class _RateLimitFilter(object):
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last_error = datetime.min
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def filter(self, record):
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# type: (logging.LogRecord) -> bool
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from django.conf import settings
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from django.core.cache import cache
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# Track duplicate errors
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duplicate = False
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rate = getattr(settings, '%s_LIMIT' % self.__class__.__name__.upper(),
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600) # seconds
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if rate > 0:
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# Test if the cache works
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try:
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cache.set('RLF_TEST_KEY', 1, 1)
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use_cache = cache.get('RLF_TEST_KEY') == 1
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except:
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use_cache = False
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if use_cache:
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if record.exc_info is not None:
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tb = force_bytes('\n'.join(traceback.format_exception(*record.exc_info)))
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else:
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tb = force_bytes(str(record))
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key = self.__class__.__name__.upper() + hashlib.sha1(tb).hexdigest()
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duplicate = cache.get(key) == 1
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if not duplicate:
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cache.set(key, 1, rate)
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else:
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min_date = datetime.now() - timedelta(seconds=rate)
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duplicate = (self.last_error >= min_date)
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if not duplicate:
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self.last_error = datetime.now()
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return not duplicate
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class ZulipLimiter(_RateLimitFilter):
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pass
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class EmailLimiter(_RateLimitFilter):
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pass
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class ReturnTrue(logging.Filter):
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def filter(self, record):
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# type: (logging.LogRecord) -> bool
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return True
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class RequireReallyDeployed(logging.Filter):
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def filter(self, record):
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# type: (logging.LogRecord) -> bool
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from django.conf import settings
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return settings.PRODUCTION
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