00a87b5059
The __future__ module [1] was used in this context to ensure compatibility between python 2 and python 3. We previously dropped the support of python 2.7 [2] and now we only support python 3 so we don't need to continue to use this module and the imports listed below. Imports commonly used and their related PEPs: - `division` is related to PEP 238 [3] - `print_function` is related to PEP 3105 [4] - `unicode_literals` is related to PEP 3112 [5] - `with_statement` is related to PEP 343 [6] - `absolute_import` is related to PEP 328 [7] [1] https://docs.python.org/3/library/__future__.html [2] https://governance.openstack.org/tc/goals/selected/ussuri/drop-py27.html [3] https://www.python.org/dev/peps/pep-0238 [4] https://www.python.org/dev/peps/pep-3105 [5] https://www.python.org/dev/peps/pep-3112 [6] https://www.python.org/dev/peps/pep-0343 [7] https://www.python.org/dev/peps/pep-0328 Change-Id: I973fc9523a32651fa016a6e09fdffc4540aacd87
89 lines
2.7 KiB
Python
89 lines
2.7 KiB
Python
# Copyright 2015 Red Hat
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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Utilities to encode and decode Base64.
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.. versionadded:: 1.10
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"""
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import base64
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import binascii
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def encode_as_bytes(s, encoding='utf-8'):
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"""Encode a string using Base64.
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If *s* is a text string, first encode it to *encoding* (UTF-8 by default).
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:param s: bytes or text string to be encoded
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:param encoding: encoding used to encode *s* if it's a text string
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:returns: Base64 encoded byte string (bytes)
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Use encode_as_text() to get the Base64 encoded string as text.
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"""
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if isinstance(s, str):
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s = s.encode(encoding)
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return base64.b64encode(s)
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def encode_as_text(s, encoding='utf-8'):
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"""Encode a string using Base64.
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If *s* is a text string, first encode it to *encoding* (UTF-8 by default).
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:param s: bytes or text string to be encoded
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:param encoding: encoding used to encode *s* if it's a text string
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:returns: Base64 encoded text string (Unicode)
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Use encode_as_bytes() to get the Base64 encoded string as bytes.
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"""
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encoded = encode_as_bytes(s, encoding=encoding)
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return encoded.decode('ascii')
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def decode_as_bytes(encoded):
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"""Decode a Base64 encoded string.
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:param encoded: bytes or text Base64 encoded string to be decoded
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:returns: decoded bytes string (bytes)
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Use decode_as_text() to get the decoded string as text.
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A TypeError is raised if the input is invalid (or incorrectly padded).
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"""
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if isinstance(encoded, bytes):
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encoded = encoded.decode('ascii')
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try:
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return base64.b64decode(encoded)
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except binascii.Error as e:
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# Transform this exception for consistency.
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raise TypeError(str(e))
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def decode_as_text(encoded, encoding='utf-8'):
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"""Decode a Base64 encoded string.
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Decode the Base64 string and then decode the result from *encoding*
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(UTF-8 by default).
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:param encoded: bytes or text Base64 encoded string to be decoded
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:returns: decoded text string (bytes)
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Use decode_as_bytes() to get the decoded string as bytes.
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"""
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decoded = decode_as_bytes(encoded)
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return decoded.decode(encoding)
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