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99 lines
4.1 KiB
Python
99 lines
4.1 KiB
Python
# -*- coding: utf-8 -*-
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##############################################################################
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#
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# Copyright (c) 2009 CamptoCamp. All rights reserved.
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# @author Nicolas Bessi
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#
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# Abstract class to fetch rates from Bank of Canada
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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##############################################################################
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from .currency_getter_interface import Currency_getter_interface
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from openerp import _
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from openerp.exceptions import except_orm
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import logging
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_logger = logging.getLogger(__name__)
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class CA_BOC_getter(Currency_getter_interface):
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"""Implementation of Curreny_getter_factory interface
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for Bank of Canada RSS service
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"""
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def get_updated_currency(self, currency_array, main_currency,
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max_delta_days):
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"""implementation of abstract method of Curreny_getter_interface"""
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# as of Jan 2014 BOC is publishing noon rates for about 60 currencies
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url = ('http://www.bankofcanada.ca/stats/assets/'
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'rates_rss/noon/en_%s.xml')
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# closing rates are available as well (please note there are only 12
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# currencies reported):
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# http://www.bankofcanada.ca/stats/assets/rates_rss/closing/en_%s.xml
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# We do not want to update the main currency
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if main_currency in currency_array:
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currency_array.remove(main_currency)
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import feedparser
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import pytz
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from dateutil import parser
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for curr in currency_array:
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_logger.debug("BOC currency rate service : connecting...")
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dom = feedparser.parse(url % curr)
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self.validate_cur(curr)
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# check if BOC service is running
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if dom.bozo and dom.status != 404:
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_logger.error("Bank of Canada - service is down - try again\
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later...")
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# check if BOC sent a valid response for this currency
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if dom.status != 200:
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_logger.error("Exchange data for %s is not reported by Bank\
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of Canada." % curr)
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raise except_orm(_('Error !'), _('Exchange data for %s is not '
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'reported by Bank of Canada.'
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% str(curr)))
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_logger.debug("BOC sent a valid RSS file for: " + curr)
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# check for valid exchange data
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if (dom.entries[0].cb_basecurrency == main_currency) and \
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(dom.entries[0].cb_targetcurrency == curr):
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rate = dom.entries[0].cb_exchangerate.split('\n', 1)[0]
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rate_date_datetime = parser.parse(dom.entries[0].updated)\
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.astimezone(pytz.utc).replace(tzinfo=None)
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self.check_rate_date(rate_date_datetime, max_delta_days)
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self.updated_currency[curr] = rate
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_logger.debug("BOC Rate retrieved : %s = %s %s" %
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(main_currency, rate, curr))
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else:
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_logger.error(
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"Exchange data format error for Bank of Canada -"
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"%s. Please check provider data format "
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"and/or source code." % curr)
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raise except_orm(_('Error !'),
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_('Exchange data format error for '
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'Bank of Canada - %s !' % str(curr)))
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return self.updated_currency, self.log_info
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