Merge branch 'master' into dev

    datefmt='%Y/%b/%d %H:%M:%S',

    handlers=[logging.FileHandler(filename='CASLogin.log', mode='a'), logging.StreamHandler()])

logger = logging.getLogger("CASLogin")

logger.setLevel(logging.DEBUG)

logger.setLevel(logging.INFO)

login = requests.session()

        if element.has_attr('value'):

            info[element['name']] = element['value']

    logger.info('Login information acquired.')

    info['username'] = username

    info['password'] = password

def main():

    logger.info('Program started.')

    logger.debug('Program started.')

    config = load_config()

    times_retry_login = config['max_times_retry_login']

    test_url = config['captive_portal_server']

    logger.info('Configurations successfully imported.')

    logger.debug('Configurations successfully imported.')

    while True:

        logger.info('Checking network status...')

                success, err = do_login(service, config['username'], config['password'])

                if err:

                    logger.error('Error occurred: ' + err.text)

                    logger.error('Error occurred: %s', str(text), exc_info=True)

                elif success:

                    logger.info('Login successful')

                    check_ip()

        times_retry_login -= 1

        logger.info('{attempt} attempt(s) remaining.'.format(attempt=times_retry_login))

        if times_retry_login <= 0:

            logger.error('Attempts used up. The program will quit.')

            raise RetryError

        logger.info('Try again in {time} sec. '.format(time=config['interval_retry_connection']))

        sleep(config['interval_retry_connection'])

    except BaseHTTPError as err:

        logger.error('{msg}, consider updating \'captive_portal_server\''.format(msg=str(err)))

    except RetryError:

        sys.exit(-1)

        logger.error('Attempts used up. The program will quit.')

    except Exception as e:

        logger.error("".join(traceback.format_exc()))

        logger.error("Critical error occurs", exc_info=True)