Class Logger

gunicorn/glogging.py:164–483

class Logger:

    LOG_LEVELS = {
        "critical": logging.CRITICAL,
        "error": logging.ERROR,
        "warning": logging.WARNING,
        "info": logging.INFO,
        "debug": logging.DEBUG
    }
    loglevel = logging.INFO

    error_fmt = r"%(asctime)s [%(process)d] [%(levelname)s] %(message)s"
    datefmt = r"[%Y-%m-%d %H:%M:%S %z]"

    access_fmt = "%(message)s"
    syslog_fmt = "[%(process)d] %(message)s"

    atoms_wrapper_class = SafeAtoms

    def __init__(self, cfg):
        self.error_log = logging.getLogger("gunicorn.error")
        self.error_log.propagate = False
        self.access_log = logging.getLogger("gunicorn.access")
        self.access_log.propagate = False
        self.error_handlers = []
        self.access_handlers = []
        self.logfile = None
        self.lock = threading.Lock()
        self.cfg = cfg
        self.setup(cfg)

    def setup(self, cfg):
        self.loglevel = self.LOG_LEVELS.get(cfg.loglevel.lower(), logging.INFO)
        self.error_log.setLevel(self.loglevel)
        self.access_log.setLevel(logging.INFO)

        # set gunicorn.error handler
        if self.cfg.capture_output and cfg.errorlog != "-":
            for stream in sys.stdout, sys.stderr:
                stream.flush()

            self.logfile = open(cfg.errorlog, 'a+')
            os.dup2(self.logfile.fileno(), sys.stdout.fileno())
            os.dup2(self.logfile.fileno(), sys.stderr.fileno())

        self._set_handler(self.error_log, cfg.errorlog,
                          logging.Formatter(self.error_fmt, self.datefmt))

        # set gunicorn.access handler
        if cfg.accesslog is not None:
            self._set_handler(
                self.access_log, cfg.accesslog,
                fmt=logging.Formatter(self.access_fmt), stream=sys.stdout
            )

        # set syslog handler
        if cfg.syslog:
            self._set_syslog_handler(