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##############################################################################
# Copyright (c) 2015 Orange
# guyrodrigue.koffi@orange.com / koffirodrigue@gmail.com
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################
from ConfigParser import SafeConfigParser, NoOptionError
def prepare_put_request(edit_request, key, new_value, old_value):
"""
This function serves to prepare the elements in the update request.
We try to avoid replace the exact values in the db
edit_request should be a dict in which we add an entry (key) after
comparing values
"""
if not (new_value is None):
if len(new_value) > 0:
if new_value != old_value:
edit_request[key] = new_value
return edit_request
class ParseError(Exception):
"""
Custom exception class for config file
"""
def __init__(self, message):
self.msg = message
def __str__(self):
return 'error parsing config file : %s' % self.msg
class APIConfig:
"""
The purpose of this class is to load values correctly from the config file.
Each key is declared as an attribute in __init__() and linked in parse()
"""
def __init__(self):
self._default_config_location = "config.ini"
self.mongo_url = None
self.mongo_dbname = None
self.api_port = None
self.api_debug_on = None
self._parser = None
def _get_parameter(self, section, param):
try:
return self._parser.get(section, param)
except NoOptionError:
raise ParseError("[%s.%s] parameter not found" % (section, param))
def _get_int_parameter(self, section, param):
try:
return int(self._get_parameter(section, param))
except ValueError:
raise ParseError("[%s.%s] not an int" % (section, param))
def _get_bool_parameter(self, section, param):
result = self._get_parameter(section, param)
if str(result).lower() == 'true':
return True
if str(result).lower() == 'false':
return False
raise ParseError(
"[%s.%s : %s] not a boolean" % (section, param, result))
@staticmethod
def parse(config_location=None):
obj = APIConfig()
if config_location is None:
config_location = obj._default_config_location
obj._parser = SafeConfigParser()
obj._parser.read(config_location)
if not obj._parser:
raise ParseError("%s not found" % config_location)
# Linking attributes to keys from file with their sections
obj.mongo_url = obj._get_parameter("mongo", "url")
obj.mongo_dbname = obj._get_parameter("mongo", "dbname")
obj.api_port = obj._get_int_parameter("api", "port")
obj.api_debug_on = obj._get_bool_parameter("api", "debug")
return obj
def __str__(self):
return "mongo_url = %s \n" \
"mongo_dbname = %s \n" \
"api_port = %s \n" \
"api_debug_on = %s \n" % (self.mongo_url,
self.mongo_dbname,
self.api_port,
self.api_debug_on)
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