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# -*- coding: utf-8 -*-
# log_silencer.py
# Copyright (C) 2013 LEAP
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
Filter for leap logs.
"""
import logging
import os
import re
from leap.bitmask.util import get_path_prefix
class SelectiveSilencerFilter(logging.Filter):
"""
Configurable filter for root leap logger.
If you want to ignore components from the logging, just add them,
one by line, to ~/.config/leap/leap.dev.conf
"""
# TODO we can augment this by properly parsing the log-silencer file
# and having different sections: ignore, levels, ...
# TODO use ConfigParser to unify sections [log-ignore] [log-debug] etc
CONFIG_NAME = "leap.dev.conf"
# Components to be completely silenced in the main bitmask logs.
# You probably should think twice before adding a component to
# the tuple below. Only very well tested components should go here, and
# only in those cases in which we gain more from silencing them than from
# having their logs into the main log file that the user will likely send
# to us.
SILENCER_RULES = (
'leap.common.events',
)
def __init__(self):
"""
Tries to load silencer rules from the default path,
or load from the SILENCER_RULES tuple if not found.
"""
self.rules = None
if os.path.isfile(self._rules_path):
self.rules = self._load_rules()
if not self.rules:
self.rules = self.SILENCER_RULES
@property
def _rules_path(self):
"""
The configuration file for custom ignore rules.
"""
return os.path.join(get_path_prefix(), "leap", self.CONFIG_NAME)
def _load_rules(self):
"""
Loads a list of paths to be ignored from the logging.
"""
lines = open(self._rules_path).readlines()
return map(lambda line: re.sub('\s', '', line),
lines)
def filter(self, record):
"""
Implements the filter functionality for this Filter
:param record: the record to be examined
:type record: logging.LogRecord
:returns: a bool indicating whether the record should be logged or not.
:rtype: bool
"""
if not self.rules:
return True
logger_path = record.name
for path in self.rules:
if logger_path.startswith(path):
return False
return True
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