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Code Issues Releases Wiki Activity

Print exceptions with stack trace

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R. Richard 2019-06-24 14:21:30 +02:00 committed by Kristóf Tóth
parent cbc62c5a10
commit d031f481b8
1 changed files with 25 additions and 2 deletions
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27
lib/tfw/config/log.py
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@ -1,6 +1,8 @@
# pylint: disable=bad-whitespace # pylint: disable=bad-whitespace
from sys import stderr from sys import stderr
from collections import deque
from datetime import datetime from datetime import datetime
from traceback import format_exception, walk_tb
from logging import DEBUG, getLogger, Handler, Formatter, Filter from logging import DEBUG, getLogger, Handler, Formatter, Filter
TFW_LOG_PATH = '/var/log/tfw.log' TFW_LOG_PATH = '/var/log/tfw.log'
@ -71,6 +73,10 @@ class TFWLogFormatter(Formatter):
'NOTSET' : COLOR.CYAN 'NOTSET' : COLOR.CYAN
} }
def __init__(self):
self.last_trace = None
super().__init__()
def format(self, record): def format(self, record):
date = datetime.utcfromtimestamp(record.created).strftime('%H:%M:%S') date = datetime.utcfromtimestamp(record.created).strftime('%H:%M:%S')
if record.args: if record.args:
@ -82,10 +88,23 @@ class TFWLogFormatter(Formatter):
short_message = record.msg short_message = record.msg
long_message = record.msg long_message = record.msg
if record.exc_info:
current_trace = self.fetch_exception_origin(record.exc_info[2])
if current_trace != self.last_trace:
self.last_trace = current_trace
trace = '\n'+''.join(format_exception(*record.exc_info))
else:
trace = (f'\nSee previous traceback...\n'
f'{record.exc_info[0].__name__}: {record.exc_info[1]}')
else:
trace = ''
short_entry = (f'[{COLOR.GREY}{date}{COLOR.RESET}|>' short_entry = (f'[{COLOR.GREY}{date}{COLOR.RESET}|>'
f'{self.severity[record.levelname]}{record.module}:' f'{self.severity[record.levelname]}{record.module}:'
f'{record.levelname.lower()}{COLOR.RESET}] {short_message}') f'{record.levelname.lower()}{COLOR.RESET}] {short_message}'
long_entry = f'[{date}|>{record.module}:{record.levelname.lower()}] {long_message}' f'{trace}')
long_entry = (f'[{date}|>{record.module}:{record.levelname.lower()}] '
f'{long_message}{trace}')
return short_entry, long_entry return short_entry, long_entry
def trim(self, value, in_dict=False): def trim(self, value, in_dict=False):
@ -97,6 +116,10 @@ class TFWLogFormatter(Formatter):
value_str = str(value) value_str = str(value)
return value_str if len(value_str) <= 20 else f'{value_str[:20]}...' return value_str if len(value_str) <= 20 else f'{value_str[:20]}...'
@staticmethod
def fetch_exception_origin(trace):
return deque(walk_tb(trace), maxlen=1).pop()
class TFWLogWhitelistFilter(Filter): class TFWLogWhitelistFilter(Filter):
def __init__(self, names): def __init__(self, names):