64 lines
1.9 KiB
Python
64 lines
1.9 KiB
Python
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"""
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Extra functionality for Flask logging
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Flask-Logging-Extras is a Flask extension that plugs into the logging
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mechanism of Flask applications.
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"""
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import logging
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__version_info__ = ('0', '0', '1')
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__version__ = '.'.join(__version_info__)
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__author__ = 'Gergely Polonkai'
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__license__ = 'BSD'
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__copyright__ = '(c) 2015 GT2'
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class FlaskExtraLogger(logging.getLoggerClass()):
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"""
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A logger class that is capable of adding extra keywords to log formatters
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"""
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def __init__(self, *args, **kwargs):
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if 'app' in kwargs and kwargs['app'] is not None:
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raise TypeError(
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"Cannot initialise {classname} with an app. "
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"See the documentation of Flask-Logging-Extras for more info."
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.format(classname=self.__class__.__name__))
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super(FlaskExtraLogger, self).__init__(*args, **kwargs)
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def _log(self, *args, **kwargs):
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if 'extra' not in kwargs:
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kwargs['extra'] = {}
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for kw in self._valid_keywords:
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if kw in kwargs:
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kwargs['extra'][kw] = kwargs[kw]
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super(FlaskExtraLogger, self)._log(*args, **kwargs)
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def init_app(self, app):
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self.app = app
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self.app.config.setdefault('FLASK_LOGGING_EXTRAS_KEYWORDS', [])
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for kw in self.app.config['FLASK_LOGGING_EXTRAS_KEYWORDS']:
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if kw in ['exc_info', 'extra', 'stack_info']:
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raise ValueError(
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'"{keyword}" member of FLASK_LOGGING_EXTRAS_KEYWORDS is '
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'reserved for internal use.')
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def register_logger_class(cls=FlaskExtraLogger):
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"""
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Register a new logger class
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It is effectively a wrapper around logging.setLoggerClass().
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"""
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if not issubclass(cls, logging.Logger):
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raise TypeError(
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"The logger class must be a subclass of logging.Logger!")
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logging.setLoggerClass(cls)
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