/usr/lib/python3/dist-packages/requestbuilder/config.py is in python3-requestbuilder 0.5.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# Permission to use, copy, modify, and/or distribute this software for
# any purpose with or without fee is hereby granted, provided that the
# above copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, 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.
from __future__ import absolute_import
import itertools
import logging
import six
from six.moves import configparser
class ConfigView(object):
def __init__(self, data, region=None, user=None):
self.log = data.log
self.__data = data
self.__region = None
self.__user = None
if region:
self.region = region
if user:
self.user = user
@property
def region(self):
return self.__region
@region.setter
def region(self, value):
self.__region = value
self.log.info('set region to %s', value)
@property
def user(self):
return self.__user
@user.setter
def user(self, value):
self.__user = value
self.log.info('set user to %s', value)
def clone(self, region=None, user=None):
region = region or self.region
user = user or self.user
return ConfigView(self.__data, region=region, user=user)
def get_global_option(self, option, redact=False):
return self.__data.lookup_global(option, redact=redact)
def get_region_option(self, option, region=None, redact=False):
return self.get_region_option2(option, region=region,
redact=redact)[0]
def get_region_option2(self, option, region=None, redact=False):
region = region or self.region
if region:
return self.__data.lookup(self.__data.regions, region, option,
redact=redact,
confdict_log_name='region')
return None, None
def get_user_option(self, option, user=None, redact=False):
return self.get_user_option2(option, user=user, redact=redact)[0]
def get_user_option2(self, option, user=None, redact=False):
user = user or self.user
if user:
return self.__data.lookup(self.__data.users, user, option,
redact=redact, confdict_log_name='user')
return None, None
def get_all_region_options(self, option):
return self.__get_all_options(self.__data.regions, option)
def get_all_user_options(self, option):
return self.__get_all_options(self.__data.users, option)
@staticmethod
def __get_all_options(confdict, option):
matches = {}
for section, options in six.iteritems(confdict):
if '*' not in section and option in options:
matches[section] = options[option]
return matches
@staticmethod
def convert_to_bool(value, default=None):
if value is None:
return default
elif str(value).lower() in ('true', '1', 'yes', 'on'):
return True
elif str(value).lower() in ('false', '0', 'no', 'off'):
return False
else:
raise ValueError('value {0} is not boolean'.format(repr(value)))
class ConfigData(object):
def __init__(self, filenames):
self.log = logging.getLogger('Config')
self.log.addHandler(_NullLogHandler()) # cheap warning silencing
self.globals = {}
self.regions = {}
self.users = {}
self._memo = {}
self._parse_config(filenames)
def _parse_config(self, filenames):
parser = configparser.SafeConfigParser()
parser.read(filenames)
for section in parser.sections():
if section == 'global':
self.globals = dict(parser.items(section))
elif section.startswith('region '):
region = section.split()[1]
if any(chunk == '' for chunk in region.split(':')):
raise ValueError(
'configuration file region {0} must not contain '
'an empty namespace'.format(repr(region)))
if '@' in region:
raise ValueError(
'configuration file region {0} must not contain '
'@ characters'.format(repr(region)))
self.regions[region] = dict(parser.items(section))
self.regions[region].setdefault('name', region.rsplit(':')[-1])
elif section.startswith('user '):
user = section.split()[1]
if any(chunk == '' for chunk in user.split(':')):
raise ValueError(
'configuration file user {0} must not contain '
'an empty namespace'.format(repr(user)))
if '@' in user:
raise ValueError(
'configuration file user {0} must not contain '
'@ characters'.format(repr(user)))
self.users[user] = dict(parser.items(section))
# Ignore unrecognized sections for forward compatibility
def lookup_global(self, option, redact=False):
self._memo.setdefault(id(self.globals), {})
if option in self._memo[id(self.globals)]:
return self._memo[id(self.globals)][option]
else:
self.log.info('finding global option %s', option)
value = self.globals.get(option)
self._memo[id(self.globals)][option] = value
if value and redact:
self.log.info(' found %s = <redacted>', option)
elif value:
self.log.info(' found %s = %s', option, value)
else:
self.log.info(' novalue for %s', option)
return value
def lookup(self, confdict, section, option, redact=False, seen=None,
confdict_log_name=None):
self._memo.setdefault(id(confdict), {})
if (section, option) in self._memo[id(confdict)]:
return self._memo[id(confdict)][(section, option)]
else:
if confdict_log_name is not None:
self.log.info('finding %s option %s', confdict_log_name,
option)
values = self.__lookup(confdict, section, option, redact=redact,
seen=seen)
self._memo[id(confdict)][(section, option)] = values
return values
def __lookup(self, confdict, section, option, redact=False, seen=None):
def redact_if_necessary(value):
if redact:
return '<redacted>'
else:
return value
if seen is None:
seen = []
# Try wildcard combinations, from most specific to least specific,
# except for the '*' section, which we handle later on because it is
# also the global default.
section_bits = section.split(':')
for prd in itertools.product((True, False), repeat=len(section_bits)):
if prd == (False,):
continue # We'll handle '*' later.
s_section = ':'.join(section_bits[i] if prd[i] else '*'
for i in range(len(section_bits)))
self.log.debug(' section %s', s_section)
if s_section in confdict and option in confdict[s_section]:
value = confdict[s_section][option]
# Check if we're redirected to another section.
if value.startswith('use '):
value_bits = value.split()
if len(value_bits) == 1:
raise ValueError("something must follow 'use' in {0}"
.format(value))
new_section = value_bits[1]
if len(value_bits) > 2:
new_option = value_bits[2]
else:
new_option = option
self.log.debug(' jump-to %s::%s (deferred)', new_section,
new_option)
if new_section not in seen:
return self.lookup(confdict, new_section, new_option,
redact=redact,
seen=(seen + [section]))
else:
self.log.warning(' aborting jump due to a loop')
# We're done!
self.log.info(' found %s::%s = %s', s_section, option,
redact_if_necessary(repr(value)))
return value, s_section
# Then see if we can find an exact match with a prefix in front of it.
# Example: 'us-east-1' -> 'aws:us-east-1'
prefixed_counts = {}
for s_section in confdict:
s_section_bits = s_section.split(':')
if (len(s_section_bits) > len(section_bits) and
s_section_bits[-len(section_bits):] == section_bits):
# It is longer and its last bits are the same as the entirety
# of section_bits
prefixed_counts.setdefault(len(s_section_bits), [])
prefixed_counts[len(s_section_bits)].append(s_section)
if prefixed_counts:
shortest_prefixed = prefixed_counts[min(prefixed_counts)]
if len(shortest_prefixed) == 1:
self.log.debug(' jump-to %s::%s (from %s)',
shortest_prefixed[0], option, section)
if shortest_prefixed[0] not in seen:
return self.lookup(confdict, shortest_prefixed[0], option,
redact=redact, seen=(seen + [section]))
else:
self.log.warning(' aborting jump due to a loop')
else:
raise ValueError(
'{0} is ambiguous; closest matches are {1}'.format(
repr(section), ', '.join(shortest_prefixed)))
# Finally, try the global default, '*'.
self.log.debug(' section *')
if '*' in confdict and option in confdict['*']:
self.log.info(' found *::%s = %s', option,
redact_if_necessary(repr(value)))
return value, '*'
self.log.info(' novalue for %s', option)
return None, None
class _NullLogHandler(logging.Handler):
def handle(self, record):
pass
def emit(self, record):
pass
def createLock(self):
self.lock = None
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