configure.py 文件源码

def configure_syslog(request=None, logger=None, exceptions=False):
    """
    Configure syslog logging channel.
    It is turned on by setting `syslog_host` in the config file.
    The port default to 514 can be overridden by setting `syslog_port`.

    :param request: tornado.httputil.HTTPServerRequest instance
    :param exceptions: boolean - This indicates if we should raise
        exceptions encountered in the logging system.
    """
    syslog_host = getattr(options, 'syslog_host', None)
    if not syslog_host:
        return

    sys.modules["logging"].raiseExceptions = exceptions
    handler = SysLogHandler(address=(syslog_host, options.syslog_port))
    formatter = log_formatter(request)
    handler.setFormatter(formatter)

    if request:
        handler.addFilter(RequestFilter(request))

    if logger:
        logger.addHandler(handler)
    else:
        logging.getLogger().addHandler(handler)