calibre-web/cps/logger.py
Ozzieisaacs 14b6202eec Code cosmetics
Fixes func in helper,web
Fixes for pdf reader
fixes for calling from another folder
renamed to calibreweb for importing in python caller script
2019-06-08 13:45:27 +02:00

126 lines
3.8 KiB
Python

# -*- coding: utf-8 -*-
# This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
# Copyright (C) 2019 pwr
#
# 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/>.
from __future__ import division, print_function, unicode_literals
import os
import inspect
import logging
from logging import Formatter, StreamHandler
from logging.handlers import RotatingFileHandler
from .constants import BASE_DIR as _BASE_DIR
FORMATTER = Formatter("[%(asctime)s] %(levelname)5s {%(name)s:%(lineno)d} %(message)s")
DEFAULT_LOG_LEVEL = logging.INFO
DEFAULT_LOG_FILE = os.path.join(_BASE_DIR, "calibre-web.log")
LOG_TO_STDERR = '/dev/stderr'
logging.addLevelName(logging.WARNING, "WARN")
logging.addLevelName(logging.CRITICAL, "CRIT")
def get(name=None):
return logging.getLogger(name)
def create():
parent_frame = inspect.stack(0)[1]
if hasattr(parent_frame, 'frame'):
parent_frame = parent_frame.frame
else:
parent_frame = parent_frame[0]
parent_module = inspect.getmodule(parent_frame)
return get(parent_module.__name__)
def is_debug_enabled():
return logging.root.level <= logging.DEBUG
def get_level_name(level):
return logging.getLevelName(level)
def is_valid_logfile(file_path):
if not file_path:
return True
if os.path.isdir(file_path):
return False
log_dir = os.path.dirname(file_path)
return (not log_dir) or os.path.isdir(log_dir)
def setup(log_file, log_level=None):
if log_file:
if not os.path.dirname(log_file):
log_file = os.path.join(_BASE_DIR, log_file)
log_file = os.path.abspath(log_file)
else:
# log_file = LOG_TO_STDERR
log_file = DEFAULT_LOG_FILE
# print ('%r -- %r' % (log_level, log_file))
r = logging.root
r.setLevel(log_level or DEFAULT_LOG_LEVEL)
previous_handler = r.handlers[0] if r.handlers else None
# print ('previous %r' % previous_handler)
if previous_handler:
# if the log_file has not changed, don't create a new handler
if getattr(previous_handler, 'baseFilename', None) == log_file:
return
r.debug("logging to %s level %s", log_file, r.level)
if log_file == LOG_TO_STDERR:
file_handler = StreamHandler()
file_handler.baseFilename = LOG_TO_STDERR
else:
try:
file_handler = RotatingFileHandler(log_file, maxBytes=50000, backupCount=2)
except IOError:
if log_file == DEFAULT_LOG_FILE:
raise
file_handler = RotatingFileHandler(DEFAULT_LOG_FILE, maxBytes=50000, backupCount=2)
file_handler.setFormatter(FORMATTER)
for h in r.handlers:
r.removeHandler(h)
h.close()
r.addHandler(file_handler)
# print ('new handler %r' % file_handler)
# Enable logging of smtp lib debug output
class StderrLogger(object):
def __init__(self, name=None):
self.log = get(name or self.__class__.__name__)
self.buffer = ''
def write(self, message):
try:
if message == '\n':
self.log.debug(self.buffer.replace('\n', '\\n'))
self.buffer = ''
else:
self.buffer += message
except Exception:
self.logger.debug("Logging Error")