django全局异常捕获保存和输出，logger配置

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使用中间件全局捕获所有异常信息并保存到log文件，方便定位问题

Middleware

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# -*- coding: UTF-8 -*-
import logging

logger = logging.getLogger('default')

class ExceptionLoggingMiddleware(object):
    def process_exception(self, request, exception):
        import traceback
        logger.error(traceback.format_exc())

settings

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MIDDLEWARE_CLASSES = (
'sql.exception_logging_middleware.ExceptionLoggingMiddleware',
)

logger

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DEFAULT_LOGS = '/tmp/default.log'
stamdard_format = '[%(asctime)s][%(threadName)s:%(thread)d]' + \
                  '[task_id:%(name)s][%(filename)s:%(lineno)d] ' + \
                  '[%(levelname)s]- %(message)s'
LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'formatters': {
        'standard': {  # 详细
            'format': stamdard_format
        },
    },
    'handlers': {
        'default': {
            'level': 'DEBUG',
            'class': 'logging.handlers.RotatingFileHandler',
            'filename': DEFAULT_LOGS,
            'maxBytes': 1024 * 1024 * 100,  # 5 MB
            'backupCount': 5,
            'formatter': 'standard',
        },
        'console': {
            'level': 'DEBUG',
            'class': 'logging.StreamHandler',
        }
    },
    'loggers': {
        'default': {  # default日志，存放于log中
            'handlers': ['default'],
            'level': 'DEBUG',
        },
        'django.db': {  # 打印SQL语句到console，方便开发
            'handlers': ['console'],
            'level': 'DEBUG',
            'propagate': True,
        },
        'django.request': {  # 打印错误信息到console，方便开发
            'handlers': ['console'],
            'level': 'DEBUG',
            'propagate': True,
        },
    }
}

log文件

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[2018-04-16 10:33:02,639][MainThread:139636491347776][task_id:default][exception_logging_middleware.py:10] [ERROR]- Traceback (most recent call last):
  File "/opt/venv4archer/lib/python3.4/site-packages/django/core/handlers/base.py", line 132, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/opt/venv4archer/lib/python3.4/site-packages/django/views/decorators/csrf.py", line 58, in wrapped_view
    return view_func(*args, **kwargs)
  File "/opt/archer/sql/views_ajax.py", line 340, in getOscPercent
    return HttpResponse(json.dumps(pctResult), content_type='application/json')
UnboundLocalError: local variable 'pctResult' referenced before assignment