203 lines
6 KiB
Python
203 lines
6 KiB
Python
import sys
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import operator
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import functools
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try:
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import builtins
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except ImportError:
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import __builtin__ as builtins
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PY2 = sys.version_info[0] == 2
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_identity = lambda x: x
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if PY2:
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unichr = unichr
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text_type = unicode
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string_types = (str, unicode)
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integer_types = (int, long)
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int_to_byte = chr
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iterkeys = lambda d, *args, **kwargs: d.iterkeys(*args, **kwargs)
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itervalues = lambda d, *args, **kwargs: d.itervalues(*args, **kwargs)
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iteritems = lambda d, *args, **kwargs: d.iteritems(*args, **kwargs)
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iterlists = lambda d, *args, **kwargs: d.iterlists(*args, **kwargs)
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iterlistvalues = lambda d, *args, **kwargs: d.iterlistvalues(*args, **kwargs)
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iter_bytes = lambda x: iter(x)
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exec('def reraise(tp, value, tb=None):\n raise tp, value, tb')
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def fix_tuple_repr(obj):
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def __repr__(self):
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cls = self.__class__
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return '%s(%s)' % (cls.__name__, ', '.join(
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'%s=%r' % (field, self[index])
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for index, field in enumerate(cls._fields)
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))
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obj.__repr__ = __repr__
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return obj
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def implements_iterator(cls):
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cls.next = cls.__next__
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del cls.__next__
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return cls
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def implements_to_string(cls):
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cls.__unicode__ = cls.__str__
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cls.__str__ = lambda x: x.__unicode__().encode('utf-8')
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return cls
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def native_string_result(func):
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def wrapper(*args, **kwargs):
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return func(*args, **kwargs).encode('utf-8')
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return functools.update_wrapper(wrapper, func)
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def implements_bool(cls):
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cls.__nonzero__ = cls.__bool__
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del cls.__bool__
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return cls
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from itertools import imap, izip, ifilter
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range_type = xrange
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from StringIO import StringIO
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from cStringIO import StringIO as BytesIO
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NativeStringIO = BytesIO
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def make_literal_wrapper(reference):
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return lambda x: x
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def normalize_string_tuple(tup):
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"""Normalizes a string tuple to a common type. Following Python 2
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rules, upgrades to unicode are implicit.
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"""
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if any(isinstance(x, text_type) for x in tup):
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return tuple(to_unicode(x) for x in tup)
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return tup
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def try_coerce_native(s):
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"""Try to coerce a unicode string to native if possible. Otherwise,
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leave it as unicode.
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"""
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try:
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return to_native(s)
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except UnicodeError:
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return s
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wsgi_get_bytes = _identity
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def wsgi_decoding_dance(s, charset='utf-8', errors='replace'):
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return s.decode(charset, errors)
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def wsgi_encoding_dance(s, charset='utf-8', errors='replace'):
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if isinstance(s, bytes):
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return s
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return s.encode(charset, errors)
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def to_bytes(x, charset=sys.getdefaultencoding(), errors='strict'):
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if x is None:
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return None
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if isinstance(x, (bytes, bytearray, buffer)):
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return bytes(x)
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if isinstance(x, unicode):
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return x.encode(charset, errors)
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raise TypeError('Expected bytes')
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def to_native(x, charset=sys.getdefaultencoding(), errors='strict'):
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if x is None or isinstance(x, str):
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return x
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return x.encode(charset, errors)
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else:
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unichr = chr
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text_type = str
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string_types = (str, )
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integer_types = (int, )
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iterkeys = lambda d, *args, **kwargs: iter(d.keys(*args, **kwargs))
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itervalues = lambda d, *args, **kwargs: iter(d.values(*args, **kwargs))
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iteritems = lambda d, *args, **kwargs: iter(d.items(*args, **kwargs))
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iterlists = lambda d, *args, **kwargs: iter(d.lists(*args, **kwargs))
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iterlistvalues = lambda d, *args, **kwargs: iter(d.listvalues(*args, **kwargs))
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int_to_byte = operator.methodcaller('to_bytes', 1, 'big')
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def iter_bytes(b):
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return map(int_to_byte, b)
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def reraise(tp, value, tb=None):
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if value.__traceback__ is not tb:
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raise value.with_traceback(tb)
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raise value
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fix_tuple_repr = _identity
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implements_iterator = _identity
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implements_to_string = _identity
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implements_bool = _identity
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native_string_result = _identity
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imap = map
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izip = zip
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ifilter = filter
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range_type = range
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from io import StringIO, BytesIO
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NativeStringIO = StringIO
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def make_literal_wrapper(reference):
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if isinstance(reference, text_type):
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return lambda x: x
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return lambda x: x.encode('latin1')
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def normalize_string_tuple(tup):
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"""Ensures that all types in the tuple are either strings
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or bytes.
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"""
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tupiter = iter(tup)
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is_text = isinstance(next(tupiter, None), text_type)
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for arg in tupiter:
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if isinstance(arg, text_type) != is_text:
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raise TypeError('Cannot mix str and bytes arguments (got %s)'
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% repr(tup))
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return tup
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try_coerce_native = _identity
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def wsgi_get_bytes(s):
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return s.encode('latin1')
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def wsgi_decoding_dance(s, charset='utf-8', errors='replace'):
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return s.encode('latin1').decode(charset, errors)
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def wsgi_encoding_dance(s, charset='utf-8', errors='replace'):
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if isinstance(s, bytes):
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return s.decode('latin1', errors)
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return s.encode(charset).decode('latin1', errors)
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def to_bytes(x, charset=sys.getdefaultencoding(), errors='strict'):
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if x is None:
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return None
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if isinstance(x, (bytes, bytearray, memoryview)):
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return bytes(x)
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if isinstance(x, str):
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return x.encode(charset, errors)
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raise TypeError('Expected bytes')
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def to_native(x, charset=sys.getdefaultencoding(), errors='strict'):
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if x is None or isinstance(x, str):
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return x
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return x.decode(charset, errors)
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def to_unicode(x, charset=sys.getdefaultencoding(), errors='strict',
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allow_none_charset=False):
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if x is None:
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return None
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if not isinstance(x, bytes):
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return text_type(x)
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if charset is None and allow_none_charset:
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return x
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return x.decode(charset, errors)
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