horizon/openstack_dashboard/api/rest/json_encoder.py
Akihiro Motoki b9d0243c33 Fix H405 (multi line docstring) warnings (openstack_dashboard)
H405: multi line docstring summary not separated with an empty line

Closes-Bug: #1696996

Change-Id: Id895695663b19522d9cdc22f8b012e49680d708b
2017-06-09 16:05:31 +00:00

82 lines
3.0 KiB
Python

# Copyright (c) 2015 Mirantis, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import json
import json.encoder as encoder
from django.utils.translation import ugettext_lazy as _
import six
class NaNJSONEncoder(json.JSONEncoder):
def __init__(self, nan_str='NaN', inf_str='1e+999', **kwargs):
self.nan_str = nan_str
self.inf_str = inf_str
super(NaNJSONEncoder, self).__init__(**kwargs)
def iterencode(self, o, _one_shot=False):
"""JSON encoder with NaN and float inf support.
The sole purpose of defining a custom JSONEncoder class is to
override floatstr() inner function, or more specifically the
representation of NaN and +/-float('inf') values in a JSON. Although
Infinity values are not supported by JSON standard, we still can
convince Javascript JSON.parse() to create a Javascript Infinity
object if we feed a token `1e+999` to it.
"""
if self.check_circular:
markers = {}
else:
markers = None
if self.ensure_ascii:
_encoder = encoder.encode_basestring_ascii
else:
_encoder = encoder.encode_basestring
# On Python 3, JSONEncoder has no more encoding attribute, it produces
# an Unicode string
if six.PY2 and self.encoding != 'utf-8':
def _encoder(o, _orig_encoder=_encoder, _encoding=self.encoding):
if isinstance(o, str):
o = o.decode(_encoding)
return _orig_encoder(o)
def floatstr(o, allow_nan=self.allow_nan, _repr=float.__repr__,
_inf=encoder.INFINITY, _neginf=-encoder.INFINITY):
# Check for specials. Note that this type of test is processor
# and/or platform-specific, so do tests which don't depend on the
# internals.
if o != o:
text = self.nan_str
elif o == _inf:
text = self.inf_str
elif o == _neginf:
text = '-' + self.inf_str
else:
return _repr(o)
if not allow_nan:
raise ValueError(
_("Out of range float values are not JSON compliant: %r") %
o)
return text
_iterencode = json.encoder._make_iterencode(
markers, self.default, _encoder, self.indent, floatstr,
self.key_separator, self.item_separator, self.sort_keys,
self.skipkeys, _one_shot)
return _iterencode(o, 0)