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# -*- coding: utf-8 -*-
Flask specific additions to :class:`~werkzeug.exceptions.HTTPException`
:copyright: (c) 2011 by Armin Ronacher.
:license: BSD, see LICENSE for more details.
from werkzeug.exceptions import HTTPException, BadRequest
from .helpers import json
class JSONHTTPException(HTTPException):
"""A base class for HTTP exceptions with ``Content-Type:
The ``description`` attribute of this class must set to a string (*not* an
HTML string) which describes the error.
def get_body(self, environ):
"""Overrides :meth:`werkzeug.exceptions.HTTPException.get_body` to
return the description of this error in JSON format instead of HTML.
return json.dumps(dict(description=self.get_description(environ)))
def get_headers(self, environ):
"""Returns a list of headers including ``Content-Type:
return [('Content-Type', 'application/json')]
class JSONBadRequest(JSONHTTPException, BadRequest):
"""Represents an HTTP ``400 Bad Request`` error whose body contains an
error message in JSON format instead of HTML format (as in the superclass).
#: The description of the error which occurred as a string.
description = (
'The browser (or proxy) sent a request that this server could not '
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