from __future__ import unicode_literals import logging import sys import warnings from django.conf import settings from django.core import mail from django.core.mail import get_connection from django.utils.deprecation import RemovedInNextVersionWarning from django.utils.encoding import force_text from django.utils.module_loading import import_string from django.views.debug import ExceptionReporter, get_exception_reporter_filter # 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': { 'console': { 'level': 'INFO', 'filters': ['require_debug_true'], 'class': 'logging.StreamHandler', }, '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, }, 'django.security': { 'handlers': ['mail_admins'], 'level': 'ERROR', 'propagate': False, }, 'py.warnings': { 'handlers': ['console'], }, } } def configure_logging(logging_config, logging_settings): if not sys.warnoptions: # Route warnings through python logging logging.captureWarnings(True) # RemovedInNextVersionWarning is a subclass of DeprecationWarning which # is hidden by default, hence we force the "default" behavior warnings.simplefilter("default", RemovedInNextVersionWarning) if logging_config: # First find the logging configuration function ... logging_config_func = import_string(logging_config) logging.config.dictConfig(DEFAULT_LOGGING) # ... then invoke it with the logging settings if logging_settings: logging_config_func(logging_settings) 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, ('internal' if request.META.get('REMOTE_ADDR') in settings.INTERNAL_IPS else 'EXTERNAL'), record.getMessage() ) filter = get_exception_reporter_filter(request) request_repr = '\n{}'.format(force_text(filter.get_request_repr(request))) except Exception: subject = '%s: %s' % ( record.levelname, record.getMessage() ) request = None request_repr = "unavailable" subject = self.format_subject(subject) if record.exc_info: exc_info = record.exc_info else: exc_info = (None, record.getMessage(), None) message = "%s\n\nRequest repr(): %s" % (self.format(record), request_repr) reporter = ExceptionReporter(request, is_email=True, *exc_info) html_message = reporter.get_traceback_html() if self.include_html else None self.send_mail(subject, message, fail_silently=True, html_message=html_message) def send_mail(self, subject, message, *args, **kwargs): mail.mail_admins(subject, message, *args, connection=self.connection(), **kwargs) 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