77 lines
2.4 KiB
Python
77 lines
2.4 KiB
Python
# Copyright (c) 2010-2012 OpenStack Foundation
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import six
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class HeaderKeyDict(dict):
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"""
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A dict that title-cases all keys on the way in, so as to be
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case-insensitive.
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Note that all keys and values are expected to be wsgi strings,
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though some allowances are made when setting values.
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"""
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def __init__(self, base_headers=None, **kwargs):
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if base_headers:
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self.update(base_headers)
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self.update(kwargs)
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@staticmethod
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def _title(s):
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if six.PY2:
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return s.title()
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else:
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return s.encode('latin1').title().decode('latin1')
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def update(self, other):
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if hasattr(other, 'keys'):
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for key in other.keys():
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self[self._title(key)] = other[key]
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else:
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for key, value in other:
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self[self._title(key)] = value
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def __getitem__(self, key):
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return dict.get(self, self._title(key))
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def __setitem__(self, key, value):
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key = self._title(key)
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if value is None:
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self.pop(key, None)
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elif six.PY2 and isinstance(value, six.text_type):
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return dict.__setitem__(self, key, value.encode('utf-8'))
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elif six.PY3 and isinstance(value, six.binary_type):
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return dict.__setitem__(self, key, value.decode('latin-1'))
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else:
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return dict.__setitem__(self, key, str(value))
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def __contains__(self, key):
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return dict.__contains__(self, self._title(key))
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def __delitem__(self, key):
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return dict.__delitem__(self, self._title(key))
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def get(self, key, default=None):
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return dict.get(self, self._title(key), default)
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def setdefault(self, key, value=None):
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if key not in self:
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self[key] = value
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return self[key]
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def pop(self, key, default=None):
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return dict.pop(self, self._title(key), default)
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