mirror of https://github.com/fail2ban/fail2ban
102 lines
3.2 KiB
Python
102 lines
3.2 KiB
Python
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# emacs: -*- mode: python; py-indent-offset: 4; indent-tabs-mode: t -*-
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# vi: set ft=python sts=4 ts=4 sw=4 noet :
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# This file is part of Fail2Ban.
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#
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# Fail2Ban is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# Fail2Ban 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 General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Fail2Ban; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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__author__ = "Yaroslav Halchenko"
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__copyright__ = "Copyright (c) 2013 Yaroslav Halchenko"
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__license__ = "GPL"
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import logging, os, re, traceback
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from os.path import basename, dirname
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#
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# Following "traceback" functions are adopted from PyMVPA distributed
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# under MIT/Expat and copyright by PyMVPA developers (i.e. me and
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# Michael). Hereby I re-license derivative work on these pieces under GPL
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# to stay in line with the main Fail2Ban license
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#
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def mbasename(s):
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"""Custom function to include directory name if filename is too common
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Also strip .py at the end
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"""
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base = basename(s)
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if base.endswith('.py'):
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base = base[:-3]
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if base in set(['base', '__init__']):
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base = basename(dirname(s)) + '.' + base
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return base
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class TraceBack(object):
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"""Customized traceback to be included in debug messages
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"""
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def __init__(self, compress=False):
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"""Initialize TrackBack metric
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Parameters
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----------
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compress : bool
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if True then prefix common with previous invocation gets
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replaced with ...
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"""
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self.__prev = ""
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self.__compress = compress
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def __call__(self):
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ftb = traceback.extract_stack(limit=100)[:-2]
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entries = [[mbasename(x[0]), str(x[1])] for x in ftb]
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entries = [ e for e in entries
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if not e[0] in ['unittest', 'logging.__init__' ]]
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# lets make it more consize
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entries_out = [entries[0]]
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for entry in entries[1:]:
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if entry[0] == entries_out[-1][0]:
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entries_out[-1][1] += ',%s' % entry[1]
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else:
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entries_out.append(entry)
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sftb = '>'.join(['%s:%s' % (mbasename(x[0]),
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x[1]) for x in entries_out])
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if self.__compress:
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# lets remove part which is common with previous invocation
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prev_next = sftb
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common_prefix = os.path.commonprefix((self.__prev, sftb))
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common_prefix2 = re.sub('>[^>]*$', '', common_prefix)
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if common_prefix2 != "":
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sftb = '...' + sftb[len(common_prefix2):]
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self.__prev = prev_next
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return sftb
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class FormatterWithTraceBack(logging.Formatter):
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"""Custom formatter which expands %(tb) and %(tbc) with tracebacks
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TODO: might need locking in case of compressed tracebacks
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"""
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def __init__(self, fmt, *args, **kwargs):
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logging.Formatter.__init__(self, fmt=fmt, *args, **kwargs)
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compress = '%(tbc)s' in fmt
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self._tb = TraceBack(compress=compress)
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def format(self, record):
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record.tbc = record.tb = self._tb()
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return logging.Formatter.format(self, record)
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