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venv/Lib/site-packages/django/utils/log.py
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233
venv/Lib/site-packages/django/utils/log.py
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import logging
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import logging.config # needed when logging_config doesn't start with logging.config
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from copy import copy
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from django.conf import settings
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from django.core import mail
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from django.core.mail import get_connection
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from django.core.management.color import color_style
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from django.utils.module_loading import import_string
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request_logger = logging.getLogger('django.request')
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# Default logging for Django. This sends an email to the site admins on every
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# HTTP 500 error. Depending on DEBUG, all other log records are either sent to
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# the console (DEBUG=True) or discarded (DEBUG=False) by means of the
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# require_debug_true filter. This configuration is quoted in
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# docs/ref/logging.txt; please amend it there if edited here.
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DEFAULT_LOGGING = {
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'version': 1,
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'disable_existing_loggers': False,
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'filters': {
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'require_debug_false': {
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'()': 'django.utils.log.RequireDebugFalse',
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},
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'require_debug_true': {
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'()': 'django.utils.log.RequireDebugTrue',
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},
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},
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'formatters': {
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'django.server': {
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'()': 'django.utils.log.ServerFormatter',
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'format': '[{server_time}] {message}',
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'style': '{',
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}
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},
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'handlers': {
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'console': {
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'level': 'INFO',
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'filters': ['require_debug_true'],
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'class': 'logging.StreamHandler',
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},
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'django.server': {
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'level': 'INFO',
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'class': 'logging.StreamHandler',
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'formatter': 'django.server',
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},
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'mail_admins': {
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'level': 'ERROR',
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'filters': ['require_debug_false'],
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'class': 'django.utils.log.AdminEmailHandler'
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}
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},
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'loggers': {
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'django': {
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'handlers': ['console', 'mail_admins'],
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'level': 'INFO',
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},
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'django.server': {
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'handlers': ['django.server'],
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'level': 'INFO',
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'propagate': False,
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},
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}
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}
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def configure_logging(logging_config, logging_settings):
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if logging_config:
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# First find the logging configuration function ...
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logging_config_func = import_string(logging_config)
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logging.config.dictConfig(DEFAULT_LOGGING)
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# ... then invoke it with the logging settings
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if logging_settings:
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logging_config_func(logging_settings)
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class AdminEmailHandler(logging.Handler):
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"""An exception log handler that emails log entries to site admins.
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If the request is passed as the first argument to the log record,
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request data will be provided in the email report.
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"""
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def __init__(self, include_html=False, email_backend=None, reporter_class=None):
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super().__init__()
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self.include_html = include_html
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self.email_backend = email_backend
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self.reporter_class = import_string(reporter_class or settings.DEFAULT_EXCEPTION_REPORTER)
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def emit(self, record):
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try:
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request = record.request
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subject = '%s (%s IP): %s' % (
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record.levelname,
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('internal' if request.META.get('REMOTE_ADDR') in settings.INTERNAL_IPS
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else 'EXTERNAL'),
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record.getMessage()
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)
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except Exception:
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subject = '%s: %s' % (
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record.levelname,
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record.getMessage()
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)
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request = None
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subject = self.format_subject(subject)
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# Since we add a nicely formatted traceback on our own, create a copy
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# of the log record without the exception data.
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no_exc_record = copy(record)
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no_exc_record.exc_info = None
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no_exc_record.exc_text = None
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if record.exc_info:
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exc_info = record.exc_info
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else:
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exc_info = (None, record.getMessage(), None)
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reporter = self.reporter_class(request, is_email=True, *exc_info)
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message = "%s\n\n%s" % (self.format(no_exc_record), reporter.get_traceback_text())
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html_message = reporter.get_traceback_html() if self.include_html else None
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self.send_mail(subject, message, fail_silently=True, html_message=html_message)
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def send_mail(self, subject, message, *args, **kwargs):
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mail.mail_admins(subject, message, *args, connection=self.connection(), **kwargs)
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def connection(self):
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return get_connection(backend=self.email_backend, fail_silently=True)
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def format_subject(self, subject):
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"""
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Escape CR and LF characters.
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"""
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return subject.replace('\n', '\\n').replace('\r', '\\r')
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class CallbackFilter(logging.Filter):
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"""
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A logging filter that checks the return value of a given callable (which
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takes the record-to-be-logged as its only parameter) to decide whether to
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log a record.
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"""
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def __init__(self, callback):
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self.callback = callback
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def filter(self, record):
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if self.callback(record):
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return 1
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return 0
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class RequireDebugFalse(logging.Filter):
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def filter(self, record):
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return not settings.DEBUG
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class RequireDebugTrue(logging.Filter):
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def filter(self, record):
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return settings.DEBUG
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class ServerFormatter(logging.Formatter):
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default_time_format = '%d/%b/%Y %H:%M:%S'
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def __init__(self, *args, **kwargs):
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self.style = color_style()
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super().__init__(*args, **kwargs)
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def format(self, record):
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msg = record.msg
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status_code = getattr(record, 'status_code', None)
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if status_code:
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if 200 <= status_code < 300:
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# Put 2XX first, since it should be the common case
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msg = self.style.HTTP_SUCCESS(msg)
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elif 100 <= status_code < 200:
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msg = self.style.HTTP_INFO(msg)
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elif status_code == 304:
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msg = self.style.HTTP_NOT_MODIFIED(msg)
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elif 300 <= status_code < 400:
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msg = self.style.HTTP_REDIRECT(msg)
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elif status_code == 404:
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msg = self.style.HTTP_NOT_FOUND(msg)
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elif 400 <= status_code < 500:
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msg = self.style.HTTP_BAD_REQUEST(msg)
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else:
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# Any 5XX, or any other status code
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msg = self.style.HTTP_SERVER_ERROR(msg)
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if self.uses_server_time() and not hasattr(record, 'server_time'):
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record.server_time = self.formatTime(record, self.datefmt)
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record.msg = msg
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return super().format(record)
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def uses_server_time(self):
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return self._fmt.find('{server_time}') >= 0
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def log_response(message, *args, response=None, request=None, logger=request_logger, level=None, exc_info=None):
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"""
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Log errors based on HttpResponse status.
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Log 5xx responses as errors and 4xx responses as warnings (unless a level
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is given as a keyword argument). The HttpResponse status_code and the
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request are passed to the logger's extra parameter.
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"""
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# Check if the response has already been logged. Multiple requests to log
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# the same response can be received in some cases, e.g., when the
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# response is the result of an exception and is logged at the time the
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# exception is caught so that the exc_info can be recorded.
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if getattr(response, '_has_been_logged', False):
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return
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if level is None:
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if response.status_code >= 500:
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level = 'error'
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elif response.status_code >= 400:
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level = 'warning'
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else:
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level = 'info'
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getattr(logger, level)(
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message, *args,
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extra={
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'status_code': response.status_code,
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'request': request,
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},
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exc_info=exc_info,
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)
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response._has_been_logged = True
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