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46 lines
1.4 KiB
Python
46 lines
1.4 KiB
Python
# -*- coding: utf-8 -*-
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"""
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flask.logging
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~~~~~~~~~~~~~
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Implements the logging support for Flask.
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:copyright: (c) 2011 by Armin Ronacher.
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:license: BSD, see LICENSE for more details.
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"""
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from __future__ import absolute_import
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from logging import getLogger, StreamHandler, Formatter, getLoggerClass, DEBUG
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def create_logger(app):
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"""Creates a logger for the given application. This logger works
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similar to a regular Python logger but changes the effective logging
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level based on the application's debug flag. Furthermore this
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function also removes all attached handlers in case there was a
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logger with the log name before.
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"""
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Logger = getLoggerClass()
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class DebugLogger(Logger):
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def getEffectiveLevel(x):
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if x.level == 0 and app.debug:
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return DEBUG
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return Logger.getEffectiveLevel(x)
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class DebugHandler(StreamHandler):
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def emit(x, record):
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StreamHandler.emit(x, record) if app.debug else None
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handler = DebugHandler()
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handler.setLevel(DEBUG)
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handler.setFormatter(Formatter(app.debug_log_format))
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logger = getLogger(app.logger_name)
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# just in case that was not a new logger, get rid of all the handlers
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# already attached to it.
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del logger.handlers[:]
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logger.__class__ = DebugLogger
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logger.addHandler(handler)
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return logger
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