# -*- coding: utf-8 -*-
# vim: tabstop=4 shiftwidth=4 softtabstop=4
#
# this file is part of 'RAX-AutoScaler'
#
# Copyright 2014 Rackspace US, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import copy
import logging
[docs]class ColouredConsoleHandler(logging.StreamHandler):
'''
console handler with ANSI colours support
Usage example:
def white_bold_underlined(self, msg):
return self.decorate(self.BOLD + self.UNDERLINE +
self.COLOR['white'], msg)
ref: http://cwoebker.com/posts/ansi-escape-codes
'''
ESCAPE = '\033[%sm'
ENDC = ESCAPE % '0'
BOLD = '1;'
FAINT = '2;'
ITALIC = '3;'
UNDERLINE = '4;'
SLOW_BLINK = '5;'
FAST_BLINK = '6;'
COLOURS = {'black': '30',
'red': '31',
'green': '32',
'yellow': '33',
'blue': '34',
'magenta': '35',
'cyan': '36',
'white': '37'}
def __init__(self, stream=None):
# run the regular Handler __init__
logging.StreamHandler.__init__(self, None)
def decorate(self, fmt, msg):
format_sequence = self.ESCAPE % fmt
return format_sequence + msg + self.ENDC
def emit(self, record):
# Need to make a actual copy of the record
# to prevent altering the message for other loggers
myrecord = copy.copy(record)
levelno = myrecord.levelno
if levelno >= 50: # CRITICAL / FATAL
myrecord.msg = self.decorate(self.BOLD + self.UNDERLINE +
self.COLOURS['red'],
str(myrecord.msg))
elif levelno >= 40: # ERROR
myrecord.msg = self.decorate(self.COLOURS['red'],
str(myrecord.msg))
elif levelno >= 30: # WARNING
myrecord.msg = self.decorate(self.COLOURS['yellow'],
str(myrecord.msg))
elif levelno >= 20: # INFO
myrecord.msg = self.decorate(self.COLOURS['green'],
str(myrecord.msg))
elif levelno >= 10: # DEBUG
myrecord.msg = self.decorate(self.COLOURS['blue'],
str(myrecord.msg))
else: # NOTSET and anything else
myrecord.msg = self.decorate(self.COLOURS['grey'],
str(myrecord.msg))
logging.StreamHandler.emit(self, myrecord)