--- /dev/null
+# This is a copy of the Python logging.config.dictconfig module.
+# It is provided here for backwards compatibility for Python versions
+# prior to 2.7.
+#
+# Copyright 2009-2010 by Vinay Sajip. All Rights Reserved.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose and without fee is hereby granted,
+# provided that the above copyright notice appear in all copies and that
+# both that copyright notice and this permission notice appear in
+# supporting documentation, and that the name of Vinay Sajip
+# not be used in advertising or publicity pertaining to distribution
+# of the software without specific, written prior permission.
+# VINAY SAJIP DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+# ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
+# VINAY SAJIP BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+# ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
+# IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import logging.handlers
+import re
+import sys
+import types
+
+IDENTIFIER = re.compile('^[a-z_][a-z0-9_]*$', re.I)
+
+def valid_ident(s):
+ m = IDENTIFIER.match(s)
+ if not m:
+ raise ValueError('Not a valid Python identifier: %r' % s)
+ return True
+
+#
+# This function is defined in logging only in recent versions of Python
+#
+try:
+ from logging import _checkLevel
+except ImportError:
+ def _checkLevel(level):
+ if isinstance(level, int):
+ rv = level
+ elif str(level) == level:
+ if level not in logging._levelNames:
+ raise ValueError('Unknown level: %r' % level)
+ rv = logging._levelNames[level]
+ else:
+ raise TypeError('Level not an integer or a '
+ 'valid string: %r' % level)
+ return rv
+
+# The ConvertingXXX classes are wrappers around standard Python containers,
+# and they serve to convert any suitable values in the container. The
+# conversion converts base dicts, lists and tuples to their wrapped
+# equivalents, whereas strings which match a conversion format are converted
+# appropriately.
+#
+# Each wrapper should have a configurator attribute holding the actual
+# configurator to use for conversion.
+
+class ConvertingDict(dict):
+ """A converting dictionary wrapper."""
+
+ def __getitem__(self, key):
+ value = dict.__getitem__(self, key)
+ result = self.configurator.convert(value)
+ #If the converted value is different, save for next time
+ if value is not result:
+ self[key] = result
+ if type(result) in (ConvertingDict, ConvertingList,
+ ConvertingTuple):
+ result.parent = self
+ result.key = key
+ return result
+
+ def get(self, key, default=None):
+ value = dict.get(self, key, default)
+ result = self.configurator.convert(value)
+ #If the converted value is different, save for next time
+ if value is not result:
+ self[key] = result
+ if type(result) in (ConvertingDict, ConvertingList,
+ ConvertingTuple):
+ result.parent = self
+ result.key = key
+ return result
+
+ def pop(self, key, default=None):
+ value = dict.pop(self, key, default)
+ result = self.configurator.convert(value)
+ if value is not result:
+ if type(result) in (ConvertingDict, ConvertingList,
+ ConvertingTuple):
+ result.parent = self
+ result.key = key
+ return result
+
+class ConvertingList(list):
+ """A converting list wrapper."""
+ def __getitem__(self, key):
+ value = list.__getitem__(self, key)
+ result = self.configurator.convert(value)
+ #If the converted value is different, save for next time
+ if value is not result:
+ self[key] = result
+ if type(result) in (ConvertingDict, ConvertingList,
+ ConvertingTuple):
+ result.parent = self
+ result.key = key
+ return result
+
+ def pop(self, idx=-1):
+ value = list.pop(self, idx)
+ result = self.configurator.convert(value)
+ if value is not result:
+ if type(result) in (ConvertingDict, ConvertingList,
+ ConvertingTuple):
+ result.parent = self
+ return result
+
+class ConvertingTuple(tuple):
+ """A converting tuple wrapper."""
+ def __getitem__(self, key):
+ value = tuple.__getitem__(self, key)
+ result = self.configurator.convert(value)
+ if value is not result:
+ if type(result) in (ConvertingDict, ConvertingList,
+ ConvertingTuple):
+ result.parent = self
+ result.key = key
+ return result
+
+class BaseConfigurator(object):
+ """
+ The configurator base class which defines some useful defaults.
+ """
+
+ CONVERT_PATTERN = re.compile(r'^(?P<prefix>[a-z]+)://(?P<suffix>.*)$')
+
+ WORD_PATTERN = re.compile(r'^\s*(\w+)\s*')
+ DOT_PATTERN = re.compile(r'^\.\s*(\w+)\s*')
+ INDEX_PATTERN = re.compile(r'^\[\s*(\w+)\s*\]\s*')
+ DIGIT_PATTERN = re.compile(r'^\d+$')
+
+ value_converters = {
+ 'ext' : 'ext_convert',
+ 'cfg' : 'cfg_convert',
+ }
+
+ # We might want to use a different one, e.g. importlib
+ importer = __import__
+
+ def __init__(self, config):
+ self.config = ConvertingDict(config)
+ self.config.configurator = self
+
+ def resolve(self, s):
+ """
+ Resolve strings to objects using standard import and attribute
+ syntax.
+ """
+ name = s.split('.')
+ used = name.pop(0)
+ try:
+ found = self.importer(used)
+ for frag in name:
+ used += '.' + frag
+ try:
+ found = getattr(found, frag)
+ except AttributeError:
+ self.importer(used)
+ found = getattr(found, frag)
+ return found
+ except ImportError:
+ e, tb = sys.exc_info()[1:]
+ v = ValueError('Cannot resolve %r: %s' % (s, e))
+ v.__cause__, v.__traceback__ = e, tb
+ raise v
+
+ def ext_convert(self, value):
+ """Default converter for the ext:// protocol."""
+ return self.resolve(value)
+
+ def cfg_convert(self, value):
+ """Default converter for the cfg:// protocol."""
+ rest = value
+ m = self.WORD_PATTERN.match(rest)
+ if m is None:
+ raise ValueError("Unable to convert %r" % value)
+ else:
+ rest = rest[m.end():]
+ d = self.config[m.groups()[0]]
+ #print d, rest
+ while rest:
+ m = self.DOT_PATTERN.match(rest)
+ if m:
+ d = d[m.groups()[0]]
+ else:
+ m = self.INDEX_PATTERN.match(rest)
+ if m:
+ idx = m.groups()[0]
+ if not self.DIGIT_PATTERN.match(idx):
+ d = d[idx]
+ else:
+ try:
+ n = int(idx) # try as number first (most likely)
+ d = d[n]
+ except TypeError:
+ d = d[idx]
+ if m:
+ rest = rest[m.end():]
+ else:
+ raise ValueError('Unable to convert '
+ '%r at %r' % (value, rest))
+ #rest should be empty
+ return d
+
+ def convert(self, value):
+ """
+ Convert values to an appropriate type. dicts, lists and tuples are
+ replaced by their converting alternatives. Strings are checked to
+ see if they have a conversion format and are converted if they do.
+ """
+ if not isinstance(value, ConvertingDict) and isinstance(value, dict):
+ value = ConvertingDict(value)
+ value.configurator = self
+ elif not isinstance(value, ConvertingList) and isinstance(value, list):
+ value = ConvertingList(value)
+ value.configurator = self
+ elif not isinstance(value, ConvertingTuple) and\
+ isinstance(value, tuple):
+ value = ConvertingTuple(value)
+ value.configurator = self
+ elif isinstance(value, basestring): # str for py3k
+ m = self.CONVERT_PATTERN.match(value)
+ if m:
+ d = m.groupdict()
+ prefix = d['prefix']
+ converter = self.value_converters.get(prefix, None)
+ if converter:
+ suffix = d['suffix']
+ converter = getattr(self, converter)
+ value = converter(suffix)
+ return value
+
+ def configure_custom(self, config):
+ """Configure an object with a user-supplied factory."""
+ c = config.pop('()')
+ if not hasattr(c, '__call__') and hasattr(types, 'ClassType') and type(c) != types.ClassType:
+ c = self.resolve(c)
+ props = config.pop('.', None)
+ # Check for valid identifiers
+ kwargs = dict([(k, config[k]) for k in config if valid_ident(k)])
+ result = c(**kwargs)
+ if props:
+ for name, value in props.items():
+ setattr(result, name, value)
+ return result
+
+ def as_tuple(self, value):
+ """Utility function which converts lists to tuples."""
+ if isinstance(value, list):
+ value = tuple(value)
+ return value
+
+class DictConfigurator(BaseConfigurator):
+ """
+ Configure logging using a dictionary-like object to describe the
+ configuration.
+ """
+
+ def configure(self):
+ """Do the configuration."""
+
+ config = self.config
+ if 'version' not in config:
+ raise ValueError("dictionary doesn't specify a version")
+ if config['version'] != 1:
+ raise ValueError("Unsupported version: %s" % config['version'])
+ incremental = config.pop('incremental', False)
+ EMPTY_DICT = {}
+ logging._acquireLock()
+ try:
+ if incremental:
+ handlers = config.get('handlers', EMPTY_DICT)
+ # incremental handler config only if handler name
+ # ties in to logging._handlers (Python 2.7)
+ if sys.version_info[:2] == (2, 7):
+ for name in handlers:
+ if name not in logging._handlers:
+ raise ValueError('No handler found with '
+ 'name %r' % name)
+ else:
+ try:
+ handler = logging._handlers[name]
+ handler_config = handlers[name]
+ level = handler_config.get('level', None)
+ if level:
+ handler.setLevel(_checkLevel(level))
+ except StandardError, e:
+ raise ValueError('Unable to configure handler '
+ '%r: %s' % (name, e))
+ loggers = config.get('loggers', EMPTY_DICT)
+ for name in loggers:
+ try:
+ self.configure_logger(name, loggers[name], True)
+ except StandardError, e:
+ raise ValueError('Unable to configure logger '
+ '%r: %s' % (name, e))
+ root = config.get('root', None)
+ if root:
+ try:
+ self.configure_root(root, True)
+ except StandardError, e:
+ raise ValueError('Unable to configure root '
+ 'logger: %s' % e)
+ else:
+ disable_existing = config.pop('disable_existing_loggers', True)
+
+ logging._handlers.clear()
+ del logging._handlerList[:]
+
+ # Do formatters first - they don't refer to anything else
+ formatters = config.get('formatters', EMPTY_DICT)
+ for name in formatters:
+ try:
+ formatters[name] = self.configure_formatter(
+ formatters[name])
+ except StandardError, e:
+ raise ValueError('Unable to configure '
+ 'formatter %r: %s' % (name, e))
+ # Next, do filters - they don't refer to anything else, either
+ filters = config.get('filters', EMPTY_DICT)
+ for name in filters:
+ try:
+ filters[name] = self.configure_filter(filters[name])
+ except StandardError, e:
+ raise ValueError('Unable to configure '
+ 'filter %r: %s' % (name, e))
+
+ # Next, do handlers - they refer to formatters and filters
+ # As handlers can refer to other handlers, sort the keys
+ # to allow a deterministic order of configuration
+ handlers = config.get('handlers', EMPTY_DICT)
+ for name in sorted(handlers):
+ try:
+ handler = self.configure_handler(handlers[name])
+ handler.name = name
+ handlers[name] = handler
+ except StandardError, e:
+ raise ValueError('Unable to configure handler '
+ '%r: %s' % (name, e))
+ # Next, do loggers - they refer to handlers and filters
+
+ #we don't want to lose the existing loggers,
+ #since other threads may have pointers to them.
+ #existing is set to contain all existing loggers,
+ #and as we go through the new configuration we
+ #remove any which are configured. At the end,
+ #what's left in existing is the set of loggers
+ #which were in the previous configuration but
+ #which are not in the new configuration.
+ root = logging.root
+ existing = root.manager.loggerDict.keys()
+ #The list needs to be sorted so that we can
+ #avoid disabling child loggers of explicitly
+ #named loggers. With a sorted list it is easier
+ #to find the child loggers.
+ existing.sort()
+ #We'll keep the list of existing loggers
+ #which are children of named loggers here...
+ child_loggers = []
+ #now set up the new ones...
+ loggers = config.get('loggers', EMPTY_DICT)
+ for name in loggers:
+ if name in existing:
+ i = existing.index(name)
+ prefixed = name + "."
+ pflen = len(prefixed)
+ num_existing = len(existing)
+ i = i + 1 # look at the entry after name
+ while (i < num_existing) and\
+ (existing[i][:pflen] == prefixed):
+ child_loggers.append(existing[i])
+ i = i + 1
+ existing.remove(name)
+ try:
+ self.configure_logger(name, loggers[name])
+ except StandardError, e:
+ raise ValueError('Unable to configure logger '
+ '%r: %s' % (name, e))
+
+ #Disable any old loggers. There's no point deleting
+ #them as other threads may continue to hold references
+ #and by disabling them, you stop them doing any logging.
+ #However, don't disable children of named loggers, as that's
+ #probably not what was intended by the user.
+ for log in existing:
+ logger = root.manager.loggerDict[log]
+ if log in child_loggers:
+ logger.level = logging.NOTSET
+ logger.handlers = []
+ logger.propagate = True
+ elif disable_existing:
+ logger.disabled = True
+
+ # And finally, do the root logger
+ root = config.get('root', None)
+ if root:
+ try:
+ self.configure_root(root)
+ except StandardError, e:
+ raise ValueError('Unable to configure root '
+ 'logger: %s' % e)
+ finally:
+ logging._releaseLock()
+
+ def configure_formatter(self, config):
+ """Configure a formatter from a dictionary."""
+ if '()' in config:
+ factory = config['()'] # for use in exception handler
+ try:
+ result = self.configure_custom(config)
+ except TypeError, te:
+ if "'format'" not in str(te):
+ raise
+ #Name of parameter changed from fmt to format.
+ #Retry with old name.
+ #This is so that code can be used with older Python versions
+ #(e.g. by Django)
+ config['fmt'] = config.pop('format')
+ config['()'] = factory
+ result = self.configure_custom(config)
+ else:
+ fmt = config.get('format', None)
+ dfmt = config.get('datefmt', None)
+ result = logging.Formatter(fmt, dfmt)
+ return result
+
+ def configure_filter(self, config):
+ """Configure a filter from a dictionary."""
+ if '()' in config:
+ result = self.configure_custom(config)
+ else:
+ name = config.get('name', '')
+ result = logging.Filter(name)
+ return result
+
+ def add_filters(self, filterer, filters):
+ """Add filters to a filterer from a list of names."""
+ for f in filters:
+ try:
+ filterer.addFilter(self.config['filters'][f])
+ except StandardError, e:
+ raise ValueError('Unable to add filter %r: %s' % (f, e))
+
+ def configure_handler(self, config):
+ """Configure a handler from a dictionary."""
+ formatter = config.pop('formatter', None)
+ if formatter:
+ try:
+ formatter = self.config['formatters'][formatter]
+ except StandardError, e:
+ raise ValueError('Unable to set formatter '
+ '%r: %s' % (formatter, e))
+ level = config.pop('level', None)
+ filters = config.pop('filters', None)
+ if '()' in config:
+ c = config.pop('()')
+ if not hasattr(c, '__call__') and hasattr(types, 'ClassType') and type(c) != types.ClassType:
+ c = self.resolve(c)
+ factory = c
+ else:
+ klass = self.resolve(config.pop('class'))
+ #Special case for handler which refers to another handler
+ if issubclass(klass, logging.handlers.MemoryHandler) and\
+ 'target' in config:
+ try:
+ config['target'] = self.config['handlers'][config['target']]
+ except StandardError, e:
+ raise ValueError('Unable to set target handler '
+ '%r: %s' % (config['target'], e))
+ elif issubclass(klass, logging.handlers.SMTPHandler) and\
+ 'mailhost' in config:
+ config['mailhost'] = self.as_tuple(config['mailhost'])
+ elif issubclass(klass, logging.handlers.SysLogHandler) and\
+ 'address' in config:
+ config['address'] = self.as_tuple(config['address'])
+ factory = klass
+ kwargs = dict([(k, config[k]) for k in config if valid_ident(k)])
+ try:
+ result = factory(**kwargs)
+ except TypeError, te:
+ if "'stream'" not in str(te):
+ raise
+ #The argument name changed from strm to stream
+ #Retry with old name.
+ #This is so that code can be used with older Python versions
+ #(e.g. by Django)
+ kwargs['strm'] = kwargs.pop('stream')
+ result = factory(**kwargs)
+ if formatter:
+ result.setFormatter(formatter)
+ if level is not None:
+ result.setLevel(_checkLevel(level))
+ if filters:
+ self.add_filters(result, filters)
+ return result
+
+ def add_handlers(self, logger, handlers):
+ """Add handlers to a logger from a list of names."""
+ for h in handlers:
+ try:
+ logger.addHandler(self.config['handlers'][h])
+ except StandardError, e:
+ raise ValueError('Unable to add handler %r: %s' % (h, e))
+
+ def common_logger_config(self, logger, config, incremental=False):
+ """
+ Perform configuration which is common to root and non-root loggers.
+ """
+ level = config.get('level', None)
+ if level is not None:
+ logger.setLevel(_checkLevel(level))
+ if not incremental:
+ #Remove any existing handlers
+ for h in logger.handlers[:]:
+ logger.removeHandler(h)
+ handlers = config.get('handlers', None)
+ if handlers:
+ self.add_handlers(logger, handlers)
+ filters = config.get('filters', None)
+ if filters:
+ self.add_filters(logger, filters)
+
+ def configure_logger(self, name, config, incremental=False):
+ """Configure a non-root logger from a dictionary."""
+ logger = logging.getLogger(name)
+ self.common_logger_config(logger, config, incremental)
+ propagate = config.get('propagate', None)
+ if propagate is not None:
+ logger.propagate = propagate
+
+ def configure_root(self, config, incremental=False):
+ """Configure a root logger from a dictionary."""
+ root = logging.getLogger()
+ self.common_logger_config(root, config, incremental)
+
+dictConfigClass = DictConfigurator
+
+def dictConfig(config):
+ """Configure logging using a dictionary."""
+ dictConfigClass(config).configure()
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