mirror of
https://github.com/encode/django-rest-framework.git
synced 2025-10-31 16:07:38 +03:00
265 lines
8.0 KiB
Python
265 lines
8.0 KiB
Python
"""
|
|
Handled exceptions raised by REST framework.
|
|
|
|
In addition, Django's built in 403 and 404 exceptions are handled.
|
|
(`django.http.Http404` and `django.core.exceptions.PermissionDenied`)
|
|
"""
|
|
import math
|
|
|
|
from django.http import JsonResponse
|
|
from django.utils.encoding import force_str
|
|
from django.utils.translation import gettext_lazy as _
|
|
from django.utils.translation import ngettext
|
|
|
|
from rest_framework import status
|
|
from rest_framework.utils.serializer_helpers import ReturnDict, ReturnList
|
|
|
|
|
|
def _get_error_details(data, default_code=None):
|
|
"""
|
|
Descend into a nested data structure, forcing any
|
|
lazy translation strings or strings into `ErrorDetail`.
|
|
"""
|
|
if isinstance(data, (list, tuple)):
|
|
ret = [
|
|
_get_error_details(item, default_code) for item in data
|
|
]
|
|
if isinstance(data, ReturnList):
|
|
return ReturnList(ret, serializer=data.serializer)
|
|
return ret
|
|
elif isinstance(data, dict):
|
|
ret = {
|
|
key: _get_error_details(value, default_code)
|
|
for key, value in data.items()
|
|
}
|
|
if isinstance(data, ReturnDict):
|
|
return ReturnDict(ret, serializer=data.serializer)
|
|
return ret
|
|
|
|
text = force_str(data)
|
|
code = getattr(data, 'code', default_code)
|
|
return ErrorDetail(text, code)
|
|
|
|
|
|
def _get_codes(detail):
|
|
if isinstance(detail, list):
|
|
return [_get_codes(item) for item in detail]
|
|
elif isinstance(detail, dict):
|
|
return {key: _get_codes(value) for key, value in detail.items()}
|
|
return detail.code
|
|
|
|
|
|
def _get_full_details(detail):
|
|
if isinstance(detail, list):
|
|
return [_get_full_details(item) for item in detail]
|
|
elif isinstance(detail, dict):
|
|
return {key: _get_full_details(value) for key, value in detail.items()}
|
|
return {
|
|
'message': detail,
|
|
'code': detail.code
|
|
}
|
|
|
|
|
|
class ErrorDetail(str):
|
|
"""
|
|
A string-like object that can additionally have a code.
|
|
"""
|
|
code = None
|
|
|
|
def __new__(cls, string, code=None):
|
|
self = super().__new__(cls, string)
|
|
self.code = code
|
|
return self
|
|
|
|
def __eq__(self, other):
|
|
result = super().__eq__(other)
|
|
if result is NotImplemented:
|
|
return NotImplemented
|
|
try:
|
|
return result and self.code == other.code
|
|
except AttributeError:
|
|
return result
|
|
|
|
def __ne__(self, other):
|
|
result = self.__eq__(other)
|
|
if result is NotImplemented:
|
|
return NotImplemented
|
|
return not result
|
|
|
|
def __repr__(self):
|
|
return 'ErrorDetail(string=%r, code=%r)' % (
|
|
str(self),
|
|
self.code,
|
|
)
|
|
|
|
def __hash__(self):
|
|
return hash(str(self))
|
|
|
|
|
|
class APIException(Exception):
|
|
"""
|
|
Base class for REST framework exceptions.
|
|
Subclasses should provide `.status_code` and `.default_detail` properties.
|
|
"""
|
|
status_code = status.HTTP_500_INTERNAL_SERVER_ERROR
|
|
default_detail = _('A server error occurred.')
|
|
default_code = 'error'
|
|
|
|
def __init__(self, detail=None, code=None):
|
|
if detail is None:
|
|
detail = self.default_detail
|
|
if code is None:
|
|
code = self.default_code
|
|
|
|
self.detail = _get_error_details(detail, code)
|
|
|
|
def __str__(self):
|
|
return str(self.detail)
|
|
|
|
def get_codes(self):
|
|
"""
|
|
Return only the code part of the error details.
|
|
|
|
Eg. {"name": ["required"]}
|
|
"""
|
|
return _get_codes(self.detail)
|
|
|
|
def get_full_details(self):
|
|
"""
|
|
Return both the message & code parts of the error details.
|
|
|
|
Eg. {"name": [{"message": "This field is required.", "code": "required"}]}
|
|
"""
|
|
return _get_full_details(self.detail)
|
|
|
|
|
|
# The recommended style for using `ValidationError` is to keep it namespaced
|
|
# under `serializers`, in order to minimize potential confusion with Django's
|
|
# built in `ValidationError`. For example:
|
|
#
|
|
# from rest_framework import serializers
|
|
# raise serializers.ValidationError('Value was invalid')
|
|
|
|
class ValidationError(APIException):
|
|
status_code = status.HTTP_400_BAD_REQUEST
|
|
default_detail = _('Invalid input.')
|
|
default_code = 'invalid'
|
|
|
|
def __init__(self, detail=None, code=None):
|
|
if detail is None:
|
|
detail = self.default_detail
|
|
if code is None:
|
|
code = self.default_code
|
|
|
|
# For validation failures, we may collect many errors together,
|
|
# so the details should always be coerced to a list if not already.
|
|
if isinstance(detail, tuple):
|
|
detail = list(detail)
|
|
elif not isinstance(detail, dict) and not isinstance(detail, list):
|
|
detail = [detail]
|
|
|
|
self.detail = _get_error_details(detail, code)
|
|
|
|
|
|
class ParseError(APIException):
|
|
status_code = status.HTTP_400_BAD_REQUEST
|
|
default_detail = _('Malformed request.')
|
|
default_code = 'parse_error'
|
|
|
|
|
|
class AuthenticationFailed(APIException):
|
|
status_code = status.HTTP_401_UNAUTHORIZED
|
|
default_detail = _('Incorrect authentication credentials.')
|
|
default_code = 'authentication_failed'
|
|
|
|
|
|
class NotAuthenticated(APIException):
|
|
status_code = status.HTTP_401_UNAUTHORIZED
|
|
default_detail = _('Authentication credentials were not provided.')
|
|
default_code = 'not_authenticated'
|
|
|
|
|
|
class PermissionDenied(APIException):
|
|
status_code = status.HTTP_403_FORBIDDEN
|
|
default_detail = _('You do not have permission to perform this action.')
|
|
default_code = 'permission_denied'
|
|
|
|
|
|
class NotFound(APIException):
|
|
status_code = status.HTTP_404_NOT_FOUND
|
|
default_detail = _('Not found.')
|
|
default_code = 'not_found'
|
|
|
|
|
|
class MethodNotAllowed(APIException):
|
|
status_code = status.HTTP_405_METHOD_NOT_ALLOWED
|
|
default_detail = _('Method "{method}" not allowed.')
|
|
default_code = 'method_not_allowed'
|
|
|
|
def __init__(self, method, detail=None, code=None):
|
|
if detail is None:
|
|
detail = force_str(self.default_detail).format(method=method)
|
|
super().__init__(detail, code)
|
|
|
|
|
|
class NotAcceptable(APIException):
|
|
status_code = status.HTTP_406_NOT_ACCEPTABLE
|
|
default_detail = _('Could not satisfy the request Accept header.')
|
|
default_code = 'not_acceptable'
|
|
|
|
def __init__(self, detail=None, code=None, available_renderers=None):
|
|
self.available_renderers = available_renderers
|
|
super().__init__(detail, code)
|
|
|
|
|
|
class UnsupportedMediaType(APIException):
|
|
status_code = status.HTTP_415_UNSUPPORTED_MEDIA_TYPE
|
|
default_detail = _('Unsupported media type "{media_type}" in request.')
|
|
default_code = 'unsupported_media_type'
|
|
|
|
def __init__(self, media_type, detail=None, code=None):
|
|
if detail is None:
|
|
detail = force_str(self.default_detail).format(media_type=media_type)
|
|
super().__init__(detail, code)
|
|
|
|
|
|
class Throttled(APIException):
|
|
status_code = status.HTTP_429_TOO_MANY_REQUESTS
|
|
default_detail = _('Request was throttled.')
|
|
extra_detail_singular = _('Expected available in {wait} second.')
|
|
extra_detail_plural = _('Expected available in {wait} seconds.')
|
|
default_code = 'throttled'
|
|
|
|
def __init__(self, wait=None, detail=None, code=None):
|
|
if detail is None:
|
|
detail = force_str(self.default_detail)
|
|
if wait is not None:
|
|
wait = math.ceil(wait)
|
|
detail = ' '.join((
|
|
detail,
|
|
force_str(ngettext(self.extra_detail_singular.format(wait=wait),
|
|
self.extra_detail_plural.format(wait=wait),
|
|
wait))))
|
|
self.wait = wait
|
|
super().__init__(detail, code)
|
|
|
|
|
|
def server_error(request, *args, **kwargs):
|
|
"""
|
|
Generic 500 error handler.
|
|
"""
|
|
data = {
|
|
'error': 'Server Error (500)'
|
|
}
|
|
return JsonResponse(data, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
|
|
|
|
|
|
def bad_request(request, exception, *args, **kwargs):
|
|
"""
|
|
Generic 400 error handler.
|
|
"""
|
|
data = {
|
|
'error': 'Bad Request (400)'
|
|
}
|
|
return JsonResponse(data, status=status.HTTP_400_BAD_REQUEST)
|