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February 27, 2017 17:41
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Example logging setup with python flask
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| import logging | |
| from flask import Flask | |
| from threading import Lock | |
| # a lock used for logger initialization | |
| _logger_lock = Lock() | |
| class MyCustomLogger(object): | |
| def __init__(self, app): | |
| self.instance = logging.getLogger(self.app.name) | |
| # Initialize logging stuff, you can use app.config here | |
| def log_response(self, flask_response): | |
| # Can create/override logger stuff | |
| pass | |
| def __getattr__(self, name): | |
| """Forward any uncaught attributes to the instance object""" | |
| logger = self.instance | |
| if hasattr(logger, name): | |
| return getattr(logger, name) | |
| else: | |
| raise AttributeError('%s has no attribute "%s"' % (self, name)) | |
| class AltFlask(Flask): | |
| """Subclass of Flask to customize behavior. | |
| This class is meant to be used in application factories. It modifies the | |
| behavior of the following: | |
| 1) Routing. | |
| 2) Exception logging. | |
| Subclassing Flask becomes necessary when an application grows, so it is | |
| generally a good idea to do it from the start. | |
| """ | |
| @property | |
| def logger(self): | |
| """Overrides the default logger property in Flask""" | |
| if self._logger and self._logger.name == self.logger_name: | |
| return self._logger | |
| with _logger_lock: | |
| if self._logger and self._logger.name == self.logger_name: | |
| return self._logger | |
| self._logger = rv = MyCustomLogger(self) | |
| return rv |
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This will initialize the logger on first use