django1/django/utils/log.py

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import logging
import traceback
from django.conf import settings
from django.core import mail
from django.core.mail import get_connection
from django.views.debug import ExceptionReporter, get_exception_reporter_filter
# Make sure a NullHandler is available
# This was added in Python 2.7/3.2
try:
from logging import NullHandler
except ImportError:
class NullHandler(logging.Handler):
def emit(self, record):
pass
# Make sure that dictConfig is available
# This was added in Python 2.7/3.2
try:
from logging.config import dictConfig
except ImportError:
from django.utils.dictconfig import dictConfig
getLogger = logging.getLogger
# Default logging for Django. This sends an email to the site admins on every
# HTTP 500 error. Depending on DEBUG, all other log records are either sent to
# the console (DEBUG=True) or discarded by mean of the NullHandler (DEBUG=False).
DEFAULT_LOGGING = {
'version': 1,
'disable_existing_loggers': False,
'filters': {
'require_debug_false': {
'()': 'django.utils.log.RequireDebugFalse',
},
'require_debug_true': {
'()': 'django.utils.log.RequireDebugTrue',
},
},
'handlers': {
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'console': {
'level': 'INFO',
'filters': ['require_debug_true'],
'class': 'logging.StreamHandler',
},
'null': {
'class': 'django.utils.log.NullHandler',
},
'mail_admins': {
'level': 'ERROR',
'filters': ['require_debug_false'],
'class': 'django.utils.log.AdminEmailHandler'
}
},
'loggers': {
'django': {
'handlers': ['console'],
},
'django.request': {
'handlers': ['mail_admins'],
'level': 'ERROR',
'propagate': False,
},
'py.warnings': {
'handlers': ['console'],
},
}
}
class AdminEmailHandler(logging.Handler):
"""An exception log handler that emails log entries to site admins.
If the request is passed as the first argument to the log record,
request data will be provided in the email report.
"""
def __init__(self, include_html=False, email_backend=None):
logging.Handler.__init__(self)
self.include_html = include_html
self.email_backend = email_backend
def emit(self, record):
try:
request = record.request
subject = '%s (%s IP): %s' % (
record.levelname,
(request.META.get('REMOTE_ADDR') in settings.INTERNAL_IPS
and 'internal' or 'EXTERNAL'),
record.getMessage()
)
filter = get_exception_reporter_filter(request)
request_repr = filter.get_request_repr(request)
except Exception:
subject = '%s: %s' % (
record.levelname,
record.getMessage()
)
request = None
request_repr = "Request repr() unavailable."
subject = self.format_subject(subject)
if record.exc_info:
exc_info = record.exc_info
stack_trace = '\n'.join(traceback.format_exception(*record.exc_info))
else:
exc_info = (None, record.getMessage(), None)
stack_trace = 'No stack trace available'
message = "%s\n\n%s" % (stack_trace, request_repr)
reporter = ExceptionReporter(request, is_email=True, *exc_info)
html_message = self.include_html and reporter.get_traceback_html() or None
mail.mail_admins(subject, message, fail_silently=True,
html_message=html_message,
connection=self.connection())
def connection(self):
return get_connection(backend=self.email_backend, fail_silently=True)
def format_subject(self, subject):
"""
Escape CR and LF characters, and limit length.
RFC 2822's hard limit is 998 characters per line. So, minus "Subject: "
the actual subject must be no longer than 989 characters.
"""
formatted_subject = subject.replace('\n', '\\n').replace('\r', '\\r')
return formatted_subject[:989]
class CallbackFilter(logging.Filter):
"""
A logging filter that checks the return value of a given callable (which
takes the record-to-be-logged as its only parameter) to decide whether to
log a record.
"""
def __init__(self, callback):
self.callback = callback
def filter(self, record):
if self.callback(record):
return 1
return 0
class RequireDebugFalse(logging.Filter):
def filter(self, record):
return not settings.DEBUG
class RequireDebugTrue(logging.Filter):
def filter(self, record):
return settings.DEBUG