db_to_gtfs.py 文件源码

def fetch_json(self, url):
        """Fetch remote json"""

        timeout = 1
        while True:
            try:
                logging.debug('Opening %s.', url)
                response = urllib2.urlopen(url)
                break
            except urllib2.HTTPError as err:
                if timeout <= MAX_TIMEOUT:
                    logging.warn('Error opening %s, error code %d, reason is %s.', url, err.code, err.reason)
                    logging.warn('Waiting for %ds before retrying.', timeout)
                    time.sleep(timeout)
                    timeout *= 2
                else:
                    logging.error('Error opening %s, error code %d, reason is %s.', url, err.code, err.reason)
                    raise err

        data = json.load(response)

        return data