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"""
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`)
"""
from __future__ import unicode_literals
from rest_framework import status
import math
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 = ''
def __init__(self, detail=None):
self.detail = detail or self.default_detail
def __str__(self):
return self.detail
class ParseError(APIException):
status_code = status.HTTP_400_BAD_REQUEST
default_detail = 'Malformed request.'
class AuthenticationFailed(APIException):
status_code = status.HTTP_401_UNAUTHORIZED
default_detail = 'Incorrect authentication credentials.'
class NotAuthenticated(APIException):
status_code = status.HTTP_401_UNAUTHORIZED
default_detail = 'Authentication credentials were not provided.'
class PermissionDenied(APIException):
status_code = status.HTTP_403_FORBIDDEN
default_detail = 'You do not have permission to perform this action.'
class MethodNotAllowed(APIException):
status_code = status.HTTP_405_METHOD_NOT_ALLOWED
default_detail = "Method '%s' not allowed."
def __init__(self, method, detail=None):
self.detail = (detail or self.default_detail) % method
class NotAcceptable(APIException):
status_code = status.HTTP_406_NOT_ACCEPTABLE
default_detail = "Could not satisfy the request's Accept header"
def __init__(self, detail=None, available_renderers=None):
self.detail = detail or self.default_detail
self.available_renderers = available_renderers
class UnsupportedMediaType(APIException):
status_code = status.HTTP_415_UNSUPPORTED_MEDIA_TYPE
default_detail = "Unsupported media type '%s' in request."
def __init__(self, media_type, detail=None):
self.detail = (detail or self.default_detail) % media_type
class Throttled(APIException):
status_code = status.HTTP_429_TOO_MANY_REQUESTS
default_detail = 'Request was throttled.'
extra_detail = " Expected available in %d second%s."
def __init__(self, wait=None, detail=None):
if wait is None:
self.detail = detail or self.default_detail
self.wait = None
else:
format = (detail or self.default_detail) + self.extra_detail
self.detail = format % (wait, wait != 1 and 's' or '')
self.wait = math.ceil(wait)
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