radicale_plugins/radicale/log.py

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2018-04-10 17:57:45 +00:00
# This file is part of Radicale Server - Calendar Server
# Copyright © 2011-2017 Guillaume Ayoub
#
# This library 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 library 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 Radicale. If not, see <http://www.gnu.org/licenses/>.
"""
Radicale logging module.
Manage logging from a configuration file. For more information, see:
http://docs.python.org/library/logging.config.html
"""
import logging
import logging.config
import signal
import sys
def configure_from_file(logger, filename, debug):
logging.config.fileConfig(filename, disable_existing_loggers=False)
if debug:
logger.setLevel(logging.DEBUG)
for handler in logger.handlers:
handler.setLevel(logging.DEBUG)
return logger
class RemoveTracebackFilter(logging.Filter):
def filter(self, record):
record.exc_info = None
return True
def start(name="radicale", filename=None, debug=False):
"""Start the logging according to the configuration."""
logger = logging.getLogger(name)
if debug:
logger.setLevel(logging.DEBUG)
else:
logger.addFilter(RemoveTracebackFilter())
if filename:
# Configuration taken from file
try:
configure_from_file(logger, filename, debug)
except Exception as e:
raise RuntimeError("Failed to load logging configuration file %r: "
"%s" % (filename, e)) from e
# Reload config on SIGHUP (UNIX only)
if hasattr(signal, "SIGHUP"):
def handler(signum, frame):
try:
configure_from_file(logger, filename, debug)
except Exception as e:
logger.error("Failed to reload logging configuration file "
"%r: %s", filename, e, exc_info=True)
signal.signal(signal.SIGHUP, handler)
else:
# Default configuration, standard output
handler = logging.StreamHandler(sys.stderr)
handler.setFormatter(
logging.Formatter("[%(thread)x] %(levelname)s: %(message)s"))
logger.addHandler(handler)
return logger