datafeed server

def callback(self, *args):
    #save to datafeed store
    return True

def archive_day(self, *args):
        """Archive daily data from yahoo provider.
    """
        yesterday = date.today() - timedelta(1)
        today = datetime.datetime.now().date()
        symbols = ["CBK.DE", "ADS.DE", "RSI.DE", "BMW.SG"]

        #fetch quotes
        f = YahooDayFetcher()
        f.fetch(symbols,
            callback=self.callback,
            start_date=yesterday,
            end_date=today)

        self.application.archive_day_time = time.time()
        logging.info("daily data archived.")

        if self.request.connection:
            self.request.write("+OK\r\n")