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# Author: Nic Wolfe <nic@wolfeden.ca>
# URL: http://code.google.com/p/sickbeard/
#
# This file is part of Sick Beard.
#
# Sick Beard 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.
#
# Sick Beard 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 Sick Beard. If not, see <http://www.gnu.org/licenses/>.
from __future__ import with_statement
import os
import threading
import logging
import sickbeard
from sickbeard import classes
# number of log files to keep
NUM_LOGS = 3
# log size in bytes
LOG_SIZE = 10000000 # 10 megs
ERROR = logging.ERROR
WARNING = logging.WARNING
MESSAGE = logging.INFO
DEBUG = logging.DEBUG
reverseNames = {u'ERROR': ERROR,
u'WARNING': WARNING,
u'INFO': MESSAGE,
u'DEBUG': DEBUG}
class SBRotatingLogHandler(object):
def __init__(self, log_file, num_files, num_bytes):
self.num_files = num_files
self.num_bytes = num_bytes
self.log_file = log_file
self.cur_handler = None
self.writes_since_check = 0
self.log_lock = threading.Lock()
def initLogging(self, consoleLogging=True):
self.log_file = os.path.join(sickbeard.LOG_DIR, self.log_file)
self.cur_handler = self._config_handler()
logging.getLogger('sickbeard').addHandler(self.cur_handler)
# define a Handler which writes INFO messages or higher to the sys.stderr
if consoleLogging:
console = logging.StreamHandler()
console.setLevel(logging.INFO)
# set a format which is simpler for console use
console.setFormatter(logging.Formatter('%(asctime)s %(levelname)s::%(message)s', '%H:%M:%S'))
# add the handler to the root logger
logging.getLogger('sickbeard').addHandler(console)
logging.getLogger('sickbeard').setLevel(logging.DEBUG)
def _config_handler(self):
"""
Configure a file handler to log at file_name and return it.
"""
file_handler = logging.FileHandler(self.log_file)
file_handler.setLevel(logging.DEBUG)
file_handler.setFormatter(logging.Formatter('%(asctime)s %(levelname)-8s %(message)s', '%b-%d %H:%M:%S'))
return file_handler
def _log_file_name(self, i):
"""
Returns a numbered log file name depending on i. If i==0 it just uses logName, if not it appends
it to the extension (blah.log.3 for i == 3)
i: Log number to ues
"""
return self.log_file + ('.' + str(i) if i else '')
def _num_logs(self):
"""
Scans the log folder and figures out how many log files there are already on disk
Returns: The number of the last used file (eg. mylog.log.3 would return 3). If there are no logs it returns -1
"""
cur_log = 0
while os.path.isfile(self._log_file_name(cur_log)):
cur_log += 1
return cur_log - 1
def _rotate_logs(self):
sb_logger = logging.getLogger('sickbeard')
# delete the old handler
if self.cur_handler:
self.cur_handler.flush()
self.cur_handler.close()
sb_logger.removeHandler(self.cur_handler)
# rename or delete all the old log files
for i in range(self._num_logs(), -1, -1):
cur_file_name = self._log_file_name(i)
try:
if i >= NUM_LOGS:
os.remove(cur_file_name)
else:
os.rename(cur_file_name, self._log_file_name(i+1))
except WindowsError:
pass
# the new log handler will always be on the un-numbered .log file
new_file_handler = self._config_handler()
self.cur_handler = new_file_handler
sb_logger.addHandler(new_file_handler)
def log(self, toLog, logLevel=MESSAGE):
with self.log_lock:
# check the size and see if we need to rotate
if self.writes_since_check >= 10:
if os.path.isfile(self.log_file) and os.path.getsize(self.log_file) >= LOG_SIZE:
self._rotate_logs()
self.writes_since_check = 0
else:
self.writes_since_check += 1
meThread = threading.currentThread().getName()
message = meThread + u" :: " + toLog
out_line = message.encode('utf-8')
sb_logger = logging.getLogger('sickbeard')
try:
if logLevel == DEBUG:
sb_logger.debug(out_line)
elif logLevel == MESSAGE:
sb_logger.info(out_line)
elif logLevel == WARNING:
sb_logger.warning(out_line)
elif logLevel == ERROR:
sb_logger.error(out_line)
# add errors to the UI logger
classes.ErrorViewer.add(classes.UIError(message))
else:
sb_logger.log(logLevel, out_line)
except ValueError:
pass
sb_log_instance = SBRotatingLogHandler('sickbeard.log', NUM_LOGS, LOG_SIZE)
def log(toLog, logLevel=MESSAGE):
sb_log_instance.log(toLog, logLevel)
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