Merge pull request #5 from gergelypolonkai/rewrite-as-formatter
Rewrite the whole thing as a Formatter
This commit is contained in:
GitHub
@@ -60,9 +60,9 @@ author = 'Gergely Polonkai'
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# built documents.
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#
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# The short X.Y version.
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version = '0.1'
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version = '1.0'
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# The full version, including alpha/beta/rc tags.
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release = '0.1.1'
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release = '1.0.0'
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# The language for content autogenerated by Sphinx. Refer to documentation
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# for a list of supported languages.
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@@ -34,15 +34,15 @@ import logging
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from flask import has_request_context, request, current_app, has_app_context
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__version_info__ = ('0', '0', '1')
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__version_info__ = ('1', '0', '0')
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__version__ = '.'.join(__version_info__)
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__author__ = 'Gergely Polonkai'
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__license__ = 'MIT'
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__copyright__ = '(c) 2015 GT2'
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__copyright__ = '(c) 2015-2018 Benchmarked.games'
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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
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class FlaskExtraLoggerFormatter(logging.Formatter):
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"""A log formatter class that is capable of adding extra keywords to log
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formatters and logging the blueprint name
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Usage:
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@@ -50,205 +50,92 @@ class FlaskExtraLogger(logging.getLoggerClass()):
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.. code-block:: python
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import logging
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from logging.config import dictConfig
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from flask_logging_extras import register_logger_class
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# This must be done before the app is initialized!
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register_logger_class(cls=FlaskExtraLogger)
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dictConfig({
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'formatters': {
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'extras': {
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'format': '[%(asctime)s] [%(levelname)s] [%(category)s] [%(blueprint)s] %(message)s',
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},
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},
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'handlers': {
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'extras_handler': {
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'class': 'logging.FileHandler',
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'args': ('app.log', 'a'),
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'formatter': 'extras',
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'level': 'INFO',
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},
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},
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'loggers': {
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'my_app': {
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'handlers': ['extras_handler'],
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}
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},
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})
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app = Flask(__name__)
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app.config['FLASK_LOGGING_EXTRAS_KEYWORDS'] = {'category': '<unset>'}
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app.config['FLASK_LOGGING_EXTRAS_BLUEPRINT'] = ('blueprint',
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'<APP>',
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'<NOT REQUEST>')
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app.logger.init_app()
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bp = Blueprint('my_blueprint', __name__)
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app.register_blueprint(bp)
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formatter = logging.Formatter(
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'[%(asctime)s] [%(levelname)s] [%(category)s] %(message)s')
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handler = logging.FileHandler('app.log', mode='a')
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handler.setFormatter(formatter)
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handler.setLevel(logging.INFO)
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app.logger.addHandler(handler)
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app.logger.info('The message', category='my category')
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logger = logging.getLogger('my_app')
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# This will produce something like this in app.log:
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# [2017-01-16 08:44:48.944] [INFO] [my category] The message
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# [2018-05-02 12:44:48.944] [INFO] [my category] [<NOT REQUEST>] The message
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logger.info('The message', extra=dict(category='my category'))
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formatter = logging.Formatter('[%(blueprint)s] %(message)s')
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handler = logging.FileHandler('other.log', mode='a')
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handler.setFormatter(formatter)
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handler.setLevel(logging.INFO)
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app.logger.addHandler(handler)
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@app.route('/1/')
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@app.route('/1')
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def route_1():
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# This will produce this log message:
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# [<APP>] Message
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current_app.logger.info('Message')
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# This will produce a log message like this:
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# [2018-05-02 12:44:48.944] [INFO] [<unset>] [<APP>] Message
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logger.info('Message')
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return ''
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@bp.route('/2')
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def route_2():
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# This will produce this log message:
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# [my blueprint] Message
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current_app.logger.info('Message')
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# This will produce a log message like this:
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# [2018-05-02 12:44:48.944] [INFO] [<unset>] [my_blueprint] Message
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logger.info('Message')
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return ''
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# This will produce this log message:
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[<NOT REQUEST>] Message
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app.logger.info('Message')
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# This will produce a log message like this:
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# [2018-05-02 12:44:48.944] [INFO] [<unset>] [<NOT REQUEST>] Message
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logger.info('Message')
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"""
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_RESERVED_KEYWORDS = ('exc_info', 'extra', 'stack_info')
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def __init__(self, *args, **kwargs):
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if 'app' in kwargs:
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if kwargs['app'] is not None:
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raise TypeError(
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"Cannot initialise {classname} with an app. See the"
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"documentation of Flask-Logging-Extras for more info."
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.format(classname=self.__class__.__name__))
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else:
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# If app is None, treat it as if it wasn’t there
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del(kwargs['app'])
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self.app = None
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self._valid_keywords = {}
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self._blueprint_var = None
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self._blueprint_app = None
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self._blueprint_norequest = None
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super(FlaskExtraLogger, self).__init__(*args, **kwargs)
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if hasattr(self.__class__, '__default_config__'):
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self.config = self.__class__.__default_config__
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self.init_from_config()
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def _log(self, *args, **kwargs):
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if has_app_context() and self.app is None:
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self.init_app(current_app)
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if 'extra' not in kwargs:
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kwargs['extra'] = {}
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# If we were asked to log the blueprint name, add it to the extra list
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if self._blueprint_var is not None:
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if has_request_context():
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kwargs['extra'][self._blueprint_var] = request.blueprint or self._blueprint_app
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else:
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kwargs['extra'][self._blueprint_var] = self._blueprint_norequest
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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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del(kwargs[kw])
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else:
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kwargs['extra'][kw] = self._valid_keywords[kw]
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super(FlaskExtraLogger, self)._log(*args, **kwargs)
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def _check_reserved_word(self, word):
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if word in self._RESERVED_KEYWORDS:
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raise ValueError(
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'"{keyword}" cannot be used as an extra keyword, as it is '
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'reserved for internal use.'
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.format(keyword=word))
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def init_from_config(self):
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"""Intialize the logger class from a Flask config dict
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The class reads its necessary configuration from the config provided.
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If the application doesn’t call this, or doesn’t have the `FLASK_LOGGING_EXTRAS_KEYWORDS`
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in its config, no extra functionality will be added.
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:raises ValueError: if the app tries to register a keyword that is
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reserved for internal use
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def _collect_keywords(self, record):
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"""Collect all valid keywords and add them to the log record if not present
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"""
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if not isinstance(self.config, dict):
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self.config = {
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'FLASK_LOGGING_EXTRAS_KEYWORDS': getattr(self.config, 'FLASK_LOGGING_EXTRAS_KEYWORDS', {}),
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'FLASK_LOGGING_EXTRAS_BLUEPRINT': getattr(self.config, 'FLASK_LOGGING_EXTRAS_BLUEPRINT', (None, '<app>', '<not a request>',)),
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}
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# We assume we do have an active app context here
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defaults = current_app.config.get('FLASK_LOGGING_EXTRAS_KEYWORDS', {})
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self.config.setdefault('FLASK_LOGGING_EXTRAS_KEYWORDS', {})
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self.config.setdefault('FLASK_LOGGING_EXTRAS_BLUEPRINT',
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(None, '<app>', '<not a request>'))
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for keyword, default in defaults.items():
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if keyword not in record.__dict__:
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setattr(record, keyword, default)
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for kw in self.config['FLASK_LOGGING_EXTRAS_KEYWORDS']:
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self._check_reserved_word(kw)
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def format(self, record):
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bp_var, bp_app, bp_noreq = ('blueprint', '<app>', '<not a request>')
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blueprint = None
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self._check_reserved_word(
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self.config['FLASK_LOGGING_EXTRAS_BLUEPRINT'][0])
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if has_app_context():
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self._collect_keywords(record)
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self._valid_keywords = self.config['FLASK_LOGGING_EXTRAS_KEYWORDS']
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(
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self._blueprint_var,
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self._blueprint_app,
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self._blueprint_norequest,
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) = self.config['FLASK_LOGGING_EXTRAS_BLUEPRINT']
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bp_var, bp_app, bp_noreq = current_app.config.get('FLASK_LOGGING_EXTRAS_BLUEPRINT',
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(bp_var, bp_app, bp_noreq))
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def init_app(self, app):
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"""
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Intialize the logger class with a Flask application
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if bp_var and has_request_context():
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blueprint = request.blueprint or bp_app
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The class reads its necessary configuration from the config of this
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application.
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if bp_var and bp_var not in record.__dict__:
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blueprint = blueprint or bp_noreq
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If the application doesn’t call this, or doesn’t have the
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`FLASK_LOGGING_EXTRAS_KEYWORDS` in its config, no extra
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functionality will be added.
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setattr(record, bp_var, blueprint)
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:param app: a Flask application
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:type app: Flask
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:raises ValueError: if the app tries to register a keyword that is
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reserved for internal use
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"""
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self.app = app
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self.config = app.config
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self.init_from_config()
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def register_logger_class(cls=FlaskExtraLogger, config=None):
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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()`, with an
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added check to make sure the class can be used as a logger.
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To use the extra features of the logger class in a Flask app, you must
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call it before the app is instantiated.
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This function returns the logger class that was the default before
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calling. This might be useful if you only want to use `cls` in the
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Flask app object, but not anywhere else in your code. In this case,
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simply call `register_logger_class()` again with the return value from
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the first invocation.
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:param cls: a logger class to register as the default one
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:type cls: class(logging.Logger)
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:returns: the old default logger class
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:rtype: class
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:raises TypeError: if the class is not a subclass of `logging.Logger`
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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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old_class = logging.getLoggerClass()
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logging.setLoggerClass(cls)
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cls.__default_config__ = config
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return old_class
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return super(FlaskExtraLoggerFormatter, self).format(record)
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2
setup.py
2
setup.py
@@ -8,7 +8,7 @@ Flask-Logging-Extras provides extra logging functionality for Flask apps.
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from setuptools import setup
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setup(name='Flask-Logging-Extras',
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version='0.2.0',
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version='1.0.0',
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url='https://github.com/gergelypolonkai/flask-logging-extras',
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license='MIT',
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author='Gergely Polonkai',
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@@ -1,9 +1,9 @@
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# -*- coding: utf-8 -*-
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"""
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Unit tests for Flask-Logging-Extras
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"""Unit tests for Flask-Logging-Extras
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"""
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import logging
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from logging.config import dictConfig
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import sys
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from unittest import TestCase
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@@ -11,203 +11,124 @@ from flask import Flask, Blueprint, current_app
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import flask_logging_extras
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class ListStream(object):
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"""
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Primitive stream that stores its input lines in a list
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"""
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class ListHandler(logging.StreamHandler):
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def __init__(self, *args, **kwargs):
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self.lines = []
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super(ListHandler, self).__init__(*args, **kwargs)
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super(ListStream, self).__init__(*args, **kwargs)
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self.logs = []
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def write(self, data):
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if len(self.lines) == 0 or self.lines[-1].endswith('\n'):
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self.lines.append(data)
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else:
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self.lines[-1] += data
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def emit(self, record):
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try:
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msg = self.format(record)
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except (KeyError, IndexError) as exc:
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msg = (exc.__class__.__name__, str(exc))
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self.logs.append(msg)
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class TestingStreamHandler(logging.StreamHandler):
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def handleError(self, record):
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exc, exc_msg, trace = sys.exc_info()
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def configure_loggers(extra_var):
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dictConfig({
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'version': 1,
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'disable_existing_loggers': True,
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'formatters': {
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'selftest': {
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'class': 'flask_logging_extras.FlaskExtraLoggerFormatter',
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'format': '%(message)s %({extra_var})s'.format(extra_var=extra_var),
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},
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},
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'handlers': {
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'selftest': {
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'class': 'test_logger_keywords.ListHandler',
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'formatter': 'selftest',
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},
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},
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'loggers': {
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'selftest': {
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'handlers': ['selftest'],
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'level': 'INFO',
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},
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},
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})
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super(logging.StreamHandler, self).handleError(record)
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formatter = flask_logging_extras.FlaskExtraLoggerFormatter(
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fmt='%(message)s %({extra_var})s'.format(extra_var=extra_var))
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raise(exc(exc_msg))
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logger = logging.getLogger('selftest')
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handlers = [handler for handler in logger.handlers if isinstance(handler, ListHandler)]
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handler = handlers[0]
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# TODO: Why doesn’t this happen automatically in Python 2.7?
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handler.setFormatter(formatter)
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return logger, handler
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class LoggerKeywordsTestCase(TestCase):
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def setUp(self):
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self.original_logger_class = logging.getLoggerClass()
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self.logger, self.handler = configure_loggers('extra_keyword')
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self.app = Flask('test_app')
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self.app.config['FLASK_LOGGING_EXTRAS_KEYWORDS'] = {
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'extra_keyword': 'placeholder',
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}
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def tearDown(self):
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logging.setLoggerClass(self.original_logger_class)
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# Make sure we don’t try to log the current blueprint for this test case
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self.app.config['FLASK_LOGGING_EXTRAS_BLUEPRINT'] = (None, '', '')
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def test_logger_registration(self):
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class NotLoggerClass(object):
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pass
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def test_keywords_no_app_ctx(self):
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"""With the current formatter, the last log line must be a just the message
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"""
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with self.assertRaises(TypeError):
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flask_logging_extras.register_logger_class(cls=NotLoggerClass)
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self.logger.info('message')
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self.assertIn(('KeyError', "'extra_keyword'"), self.handler.logs)
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original_logging_class = logging.getLoggerClass()
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old_class = flask_logging_extras.register_logger_class()
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# If no class is specified, FlaskExtraLogger should be registered
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self.assertEqual(logging.getLoggerClass(),
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flask_logging_extras.FlaskExtraLogger)
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# The return value of this function should be the old default
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self.assertEqual(original_logging_class, old_class)
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class MyLogger(logging.Logger):
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pass
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# Calling register_logger_class() with any subclass of
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# logging.Logger should succeed
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flask_logging_extras.register_logger_class(cls=MyLogger)
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def test_logger_class(self):
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# If app is present during __init__, and is not None, we should get
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# a TypeError
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with self.assertRaises(TypeError):
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flask_logging_extras.FlaskExtraLogger('test_logger',
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app='test value')
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# If app is present, but is None, no exception should be raised
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flask_logging_extras.FlaskExtraLogger('test_logger', app=None)
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def test_logger_class_init_app(self):
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logger = flask_logging_extras.FlaskExtraLogger('test')
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app = Flask('test_app')
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logger.init_app(app)
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self.assertEqual({}, logger._valid_keywords)
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app.config['FLASK_LOGGING_EXTRAS_KEYWORDS'] = {'exc_info': None}
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with self.assertRaises(ValueError):
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logger.init_app(app)
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app.config['FLASK_LOGGING_EXTRAS_KEYWORDS'] = {'my_keyword': '<unset>'}
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logger.init_app(app)
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self.assertEqual({'my_keyword': '<unset>'}, logger._valid_keywords)
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# Without registration first, app.logger should not be of class
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# FlaskExtraLogger (even though logger.init_app() succeeded without
|
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# it.)
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self.assertNotIsInstance(app.logger,
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flask_logging_extras.FlaskExtraLogger)
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flask_logging_extras.register_logger_class()
|
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|
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# Even after registratiiion, existing apps are (obviously) not
|
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# tampered with
|
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|
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self.assertNotIsInstance(app.logger,
|
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flask_logging_extras.FlaskExtraLogger)
|
||||
|
||||
app = Flask('test_app')
|
||||
|
||||
# Newly created apps, though, should be made with this class
|
||||
self.assertIsInstance(app.logger,
|
||||
flask_logging_extras.FlaskExtraLogger)
|
||||
|
||||
def _create_app_with_logger(self, fmt, keywords=[]):
|
||||
app = Flask('test_app')
|
||||
|
||||
self.assertIsInstance(app.logger,
|
||||
flask_logging_extras.FlaskExtraLogger)
|
||||
|
||||
app.config['FLASK_LOGGING_EXTRAS_KEYWORDS'] = keywords
|
||||
app.logger.init_app(app)
|
||||
|
||||
formatter = logging.Formatter(fmt)
|
||||
stream = ListStream()
|
||||
|
||||
handler = TestingStreamHandler(stream=stream)
|
||||
handler.setLevel(logging.DEBUG)
|
||||
handler.setFormatter(formatter)
|
||||
|
||||
app.logger.addHandler(handler)
|
||||
app.logger.setLevel(logging.DEBUG)
|
||||
|
||||
return app, stream
|
||||
|
||||
def test_keywords(self):
|
||||
# Register our logger class as the default
|
||||
old_logger_class = flask_logging_extras.register_logger_class()
|
||||
|
||||
app, log_stream = self._create_app_with_logger('%(message)s')
|
||||
|
||||
app.logger.info('message')
|
||||
# With the current formatter, the last log line must be a just the
|
||||
# message
|
||||
self.assertEqual(log_stream.lines[-1], 'message\n')
|
||||
|
||||
app, log_stream = self._create_app_with_logger(
|
||||
'%(message)s %(extra_keyword)s')
|
||||
|
||||
# If we don’t register 'extra_keyword' in the app config, we get a
|
||||
def test_keywords_app_ctx_assign_value(self):
|
||||
"""If we don’t register 'extra_keyword' in the app config, we get a
|
||||
# KeyError. We set logging.raiseExceptions to False here; the
|
||||
# reason is that this doesn’t mean an actual exception is raised,
|
||||
# but our TestingStreamHandler does that for us (which we need for
|
||||
# testing purposes)
|
||||
old_raiseExceptions = logging.raiseExceptions
|
||||
logging.raiseExceptions = False
|
||||
with self.assertRaises(KeyError):
|
||||
app.logger.info('message')
|
||||
logging.raiseExceptions = old_raiseExceptions
|
||||
"""
|
||||
|
||||
app, log_stream = self._create_app_with_logger(
|
||||
'%(message)s [%(extra_keyword)s]',
|
||||
keywords={'extra_keyword': '<unset>'})
|
||||
with self.app.app_context():
|
||||
self.logger.info('message', extra=dict(extra_keyword='test'))
|
||||
|
||||
app.logger.info('message', extra_keyword='test')
|
||||
self.assertEqual('message [test]\n', log_stream.lines[-1])
|
||||
self.assertIn('message test', self.handler.logs)
|
||||
|
||||
# If we don’t provide a value for a registered extra keyword, the
|
||||
def test_keywords_app_ctx_no_value(self):
|
||||
"""If we don’t provide a value for a registered extra keyword, the
|
||||
# string "<unset>" will be assigned.
|
||||
app.logger.info('message')
|
||||
self.assertEqual('message [<unset>]\n', log_stream.lines[-1])
|
||||
"""
|
||||
|
||||
with self.app.app_context():
|
||||
self.logger.info('message')
|
||||
|
||||
self.assertIn('message placeholder', self.handler.logs)
|
||||
|
||||
|
||||
class LoggerBlueprintTestCase(TestCase):
|
||||
def setUp(self):
|
||||
# Register our logger class
|
||||
self.original_logger_class = logging.getLoggerClass()
|
||||
flask_logging_extras.register_logger_class()
|
||||
|
||||
app = Flask('test_app')
|
||||
self.app = app
|
||||
app.config['FLASK_LOGGING_EXTRAS_BLUEPRINT'] = (
|
||||
'bp', '<app>', '<norequest>')
|
||||
app.logger.init_app(app)
|
||||
app.config['FLASK_LOGGING_EXTRAS_BLUEPRINT'] = ('bp', '<app>', '<norequest>')
|
||||
|
||||
fmt = '%(bp)s %(message)s'
|
||||
self.stream = ListStream()
|
||||
configure_loggers('bp')
|
||||
self.logger = logging.getLogger('selftest')
|
||||
handlers = [handler for handler in self.logger.handlers if isinstance(handler, ListHandler)]
|
||||
self.handler = handlers[0]
|
||||
|
||||
formatter = logging.Formatter(fmt)
|
||||
self.handler = TestingStreamHandler(stream=self.stream)
|
||||
self.handler.setLevel(logging.DEBUG)
|
||||
self.handler.setFormatter(formatter)
|
||||
app.logger.addHandler(self.handler)
|
||||
app.logger.setLevel(logging.DEBUG)
|
||||
|
||||
bp = Blueprint('test_blueprint', 'test_bpg13')
|
||||
bp = Blueprint('test_blueprint', 'test_bp')
|
||||
|
||||
@app.route('/app')
|
||||
def route_1():
|
||||
current_app.logger.info('Message')
|
||||
self.logger.info('Message')
|
||||
|
||||
return ''
|
||||
|
||||
@bp.route('/blueprint')
|
||||
def route_2():
|
||||
current_app.logger.info('Message')
|
||||
self.logger.info('Message')
|
||||
|
||||
return ''
|
||||
|
||||
@@ -215,26 +136,16 @@ class LoggerBlueprintTestCase(TestCase):
|
||||
|
||||
self.client = app.test_client()
|
||||
|
||||
def tearDown(self):
|
||||
logging.setLoggerClass(self.original_logger_class)
|
||||
|
||||
def test_autoconfig(self):
|
||||
logger = logging.getLogger('test')
|
||||
logger.addHandler(self.handler)
|
||||
|
||||
with self.app.app_context():
|
||||
logger.warning('Hello')
|
||||
|
||||
self.assertEqual('<norequest> Hello\n', self.stream.lines[-1])
|
||||
|
||||
def test_request_log(self):
|
||||
def test_blueprint_log_no_blueprint(self):
|
||||
self.client.get('/app')
|
||||
self.assertEqual('<app> Message\n', self.stream.lines[-1])
|
||||
self.assertIn('Message <app>', self.handler.logs)
|
||||
|
||||
page = self.client.get('/blueprint')
|
||||
self.assertEqual('test_blueprint Message\n', self.stream.lines[-1])
|
||||
def test_blueprint_log_blueprint(self):
|
||||
self.client.get('/blueprint')
|
||||
self.assertIn('Message test_blueprint', self.handler.logs)
|
||||
|
||||
def test_blueprint_log_no_request(self):
|
||||
with self.app.app_context():
|
||||
current_app.logger.info('Message')
|
||||
self.logger.info('Message')
|
||||
|
||||
self.assertEqual('<norequest> Message\n', self.stream.lines[-1])
|
||||
self.assertIn('Message <norequest>', self.handler.logs)
|
||||
|
||||
Reference in New Issue
Block a user