67 lines
2.3 KiB
Python
67 lines
2.3 KiB
Python
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"""Compatibility code for using Cheroot with various versions of Python."""
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from __future__ import absolute_import, division, print_function
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__metaclass__ = type
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import re
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import six
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if six.PY3:
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def ntob(n, encoding='ISO-8859-1'):
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"""Return the native string as bytes in the given encoding."""
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assert_native(n)
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# In Python 3, the native string type is unicode
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return n.encode(encoding)
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def ntou(n, encoding='ISO-8859-1'):
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"""Return the native string as unicode with the given encoding."""
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assert_native(n)
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# In Python 3, the native string type is unicode
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return n
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def bton(b, encoding='ISO-8859-1'):
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"""Return the byte string as native string in the given encoding."""
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return b.decode(encoding)
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else:
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# Python 2
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def ntob(n, encoding='ISO-8859-1'):
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"""Return the native string as bytes in the given encoding."""
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assert_native(n)
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# In Python 2, the native string type is bytes. Assume it's already
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# in the given encoding, which for ISO-8859-1 is almost always what
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# was intended.
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return n
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def ntou(n, encoding='ISO-8859-1'):
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"""Return the native string as unicode with the given encoding."""
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assert_native(n)
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# In Python 2, the native string type is bytes.
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# First, check for the special encoding 'escape'. The test suite uses
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# this to signal that it wants to pass a string with embedded \uXXXX
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# escapes, but without having to prefix it with u'' for Python 2,
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# but no prefix for Python 3.
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if encoding == 'escape':
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return six.u(
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re.sub(r'\\u([0-9a-zA-Z]{4})',
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lambda m: six.unichr(int(m.group(1), 16)),
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n.decode('ISO-8859-1')))
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# Assume it's already in the given encoding, which for ISO-8859-1
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# is almost always what was intended.
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return n.decode(encoding)
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def bton(b, encoding='ISO-8859-1'):
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"""Return the byte string as native string in the given encoding."""
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return b
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def assert_native(n):
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"""Check whether the input is of nativ ``str`` type.
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Raises:
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TypeError: in case of failed check
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"""
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if not isinstance(n, str):
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raise TypeError('n must be a native str (got %s)' % type(n).__name__)
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