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import traceback
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from logging import getLogger
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from django.core.exceptions import PermissionDenied, ObjectDoesNotExist as DJObjectDoesNotExist
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from django.db.models.deletion import ProtectedError
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from django.http import Http404
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from django.utils.translation import gettext
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from django.conf import settings
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from rest_framework import exceptions
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from rest_framework.response import Response
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from rest_framework.views import set_rollback
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from common.exceptions import JMSObjectDoesNotExist, ReferencedByOthers
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logger = getLogger('drf_exception')
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unexpected_exception_logger = getLogger('unexpected_exception')
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def extract_object_name(exc, index=0):
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"""
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`index` 是从 0 开始数的， 比如：
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`No User matches the given query.`
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提取 `User`，`index=1`
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"""
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if exc.args:
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(msg, *others) = exc.args
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else:
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return gettext('Object')
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return gettext(msg.split(sep=' ', maxsplit=index + 1)[index])
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def common_exception_handler(exc, context):
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if settings.DEBUG_DEV:
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logger.exception('Print traceback exception for Debug')
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traceback.print_exc()
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if isinstance(exc, Http404):
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exc = JMSObjectDoesNotExist(object_name=extract_object_name(exc, 1))
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elif isinstance(exc, PermissionDenied):
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exc = exceptions.PermissionDenied()
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elif isinstance(exc, DJObjectDoesNotExist):
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exc = JMSObjectDoesNotExist(object_name=extract_object_name(exc, 0))
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elif isinstance(exc, ProtectedError):
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exc = ReferencedByOthers()
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if isinstance(exc, exceptions.APIException):
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headers = {}
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if getattr(exc, 'auth_header', None):
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headers['WWW-Authenticate'] = exc.auth_header
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if getattr(exc, 'wait', None):
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headers['Retry-After'] = '%d' % exc.wait
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if isinstance(exc.detail, str) and isinstance(exc.get_codes(), str):
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data = {'detail': exc.detail, 'code': exc.get_codes()}
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else:
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data = exc.detail
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set_rollback()
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return Response(data, status=exc.status_code, headers=headers)
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else:
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unexpected_exception_logger.exception('')
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return None
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