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replace old compat_urllib_parse_unquote with backport from python3's function
* required unquote_to_bytes function ported as well (uses .decode('hex') instead of dynamically populated _hextobyte global) * required implicit conversion to bytes and/or unicode in places due to differing type assumptions in p3
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1 changed files with 74 additions and 1 deletions
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@ -74,10 +74,81 @@ try:
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except ImportError:
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import BaseHTTPServer as compat_http_server
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from pprint import (pprint, pformat)
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def dprint(fmt):
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sys.stderr.write(pformat(fmt) + "\n")
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try:
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from urllib.parse import unquote as compat_urllib_parse_unquote
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except ImportError:
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def compat_urllib_parse_unquote(string, encoding='utf-8', errors='replace'):
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def compat_urllib_parse_unquote_to_bytes(string):
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"""unquote_to_bytes('abc%20def') -> b'abc def'."""
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# Note: strings are encoded as UTF-8. This is only an issue if it contains
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# unescaped non-ASCII characters, which URIs should not.
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if not string:
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# Is it a string-like object?
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string.split
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return b''
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if isinstance(string, str):
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string = string.encode('utf-8')
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# string = encode('utf-8')
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# python3 -> 2: must implicitly convert to bits
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bits = bytes(string).split(b'%')
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if len(bits) == 1:
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return string
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res = [bits[0]]
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append = res.append
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for item in bits[1:]:
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try:
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append(item[:2].decode('hex'))
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append(item[2:])
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except:
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append(b'%')
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append(item)
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return b''.join(res)
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compat_urllib_parse_asciire = re.compile('([\x00-\x7f]+)')
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def new_compat_urllib_parse_unquote(string, encoding='utf-8', errors='replace'):
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"""Replace %xx escapes by their single-character equivalent. The optional
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encoding and errors parameters specify how to decode percent-encoded
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sequences into Unicode characters, as accepted by the bytes.decode()
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method.
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By default, percent-encoded sequences are decoded with UTF-8, and invalid
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sequences are replaced by a placeholder character.
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unquote('abc%20def') -> 'abc def'.
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"""
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if '%' not in string:
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string.split
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return string
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if encoding is None:
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encoding = 'utf-8'
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if errors is None:
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errors = 'replace'
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bits = compat_urllib_parse_asciire.split(string)
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res = [bits[0]]
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append = res.append
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for i in range(1, len(bits), 2):
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foo = compat_urllib_parse_unquote_to_bytes(bits[i])
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foo = foo.decode(encoding, errors)
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append(foo)
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if bits[i + 1]:
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bar = bits[i + 1]
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if not isinstance(bar, unicode):
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bar = bar.decode('utf-8')
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append(bar)
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return ''.join(res)
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def old_compat_urllib_parse_unquote(string, encoding='utf-8', errors='replace'):
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if string == '':
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return string
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res = string.split('%')
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@ -114,6 +185,8 @@ except ImportError:
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string += pct_sequence.decode(encoding, errors)
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return string
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compat_urllib_parse_unquote = new_compat_urllib_parse_unquote
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try:
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compat_str = unicode # Python 2
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except NameError:
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