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#
# This file is part of pyasn1 software.
#
# Copyright (c) 2005-2019, Ilya Etingof <etingof@gmail.com>
# License: http://snmplabs.com/pyasn1/license.html
#
import logging
import sys
from pyasn1 import __version__
from pyasn1 import error
from pyasn1.compat.octets import octs2ints
__all__ = ["Debug", "setLogger", "hexdump"]
DEBUG_NONE = 0x0000
DEBUG_ENCODER = 0x0001
DEBUG_DECODER = 0x0002
DEBUG_ALL = 0xFFFF
FLAG_MAP = {
"none": DEBUG_NONE,
"encoder": DEBUG_ENCODER,
"decoder": DEBUG_DECODER,
"all": DEBUG_ALL,
}
LOGGEE_MAP = {}
class Printer(object):
# noinspection PyShadowingNames
def __init__(self, logger=None, handler=None, formatter=None):
if logger is None:
logger = logging.getLogger("pyasn1")
logger.setLevel(logging.DEBUG)
if handler is None:
handler = logging.StreamHandler()
if formatter is None:
formatter = logging.Formatter("%(asctime)s %(name)s: %(message)s")
handler.setFormatter(formatter)
handler.setLevel(logging.DEBUG)
logger.addHandler(handler)
self.__logger = logger
def __call__(self, msg):
self.__logger.debug(msg)
def __str__(self):
return "<python logging>"
if hasattr(logging, "NullHandler"):
NullHandler = logging.NullHandler
else:
# Python 2.6 and older
class NullHandler(logging.Handler):
def emit(self, record):
pass
class Debug(object):
defaultPrinter = Printer()
def __init__(self, *flags, **options):
self._flags = DEBUG_NONE
if "loggerName" in options:
# route our logs to parent logger
self._printer = Printer(
logger=logging.getLogger(options["loggerName"]), handler=NullHandler()
)
elif "printer" in options:
self._printer = options.get("printer")
else:
self._printer = self.defaultPrinter
self._printer(
"running pyasn1 %s, debug flags %s" % (__version__, ", ".join(flags))
)
for flag in flags:
inverse = flag and flag[0] in ("!", "~")
if inverse:
flag = flag[1:]
try:
if inverse:
self._flags &= ~FLAG_MAP[flag]
else:
self._flags |= FLAG_MAP[flag]
except KeyError:
raise error.PyAsn1Error("bad debug flag %s" % flag)
self._printer(
"debug category '%s' %s" % (flag, inverse and "disabled" or "enabled")
)
def __str__(self):
return "logger %s, flags %x" % (self._printer, self._flags)
def __call__(self, msg):
self._printer(msg)
def __and__(self, flag):
return self._flags & flag
def __rand__(self, flag):
return flag & self._flags
_LOG = DEBUG_NONE
def setLogger(userLogger):
global _LOG
if userLogger:
_LOG = userLogger
else:
_LOG = DEBUG_NONE
# Update registered logging clients
for module, (name, flags) in LOGGEE_MAP.items():
setattr(module, name, _LOG & flags and _LOG or DEBUG_NONE)
def registerLoggee(module, name="LOG", flags=DEBUG_NONE):
LOGGEE_MAP[sys.modules[module]] = name, flags
setLogger(_LOG)
return _LOG
def hexdump(octets):
return " ".join(
[
"%s%.2X" % (n % 16 == 0 and ("\n%.5d: " % n) or "", x)
for n, x in zip(range(len(octets)), octs2ints(octets))
]
)
class Scope(object):
def __init__(self):
self._list = []
def __str__(self):
return ".".join(self._list)
def push(self, token):
self._list.append(token)
def pop(self):
return self._list.pop()
scope = Scope()
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