def decode_params(params):
"""Decode parameters list according to RFC 2231.
params is a sequence of 2-tuples containing (param name, string value).
"""
# Copy params so we don't mess with the original
params = params[:]
new_params = []
# Map parameter's name to a list of continuations. The values are a
# 3-tuple of the continuation number, the string value, and a flag
# specifying whether a particular segment is %-encoded.
rfc2231_params = {}
name, value = params.pop(0)
new_params.append((name, value))
while params:
name, value = params.pop(0)
if name.endswith('*'):
encoded = True
else:
encoded = False
value = unquote(value)
mo = rfc2231_continuation.match(name)
if mo:
name, num = mo.group('name', 'num')
if num is not None:
num = int(num)
rfc2231_params.setdefault(name, []).append((num, value, encoded))
else:
new_params.append((name, '"%s"' % quote(value)))
if rfc2231_params:
for name, continuations in rfc2231_params.items():
value = []
extended = False
# Sort by number
continuations.sort()
# And now append all values in numerical order, converting
# %-encodings for the encoded segments. If any of the
# continuation names ends in a *, then the entire string, after
# decoding segments and concatenating, must have the charset and
# language specifiers at the beginning of the string.
for num, s, encoded in continuations:
if encoded:
# Decode as "latin-1", so the characters in s directly
# represent the percent-encoded octet values.
# collapse_rfc2231_value treats this as an octet sequence.
s = url_unquote(s, encoding="latin-1")
extended = True
value.append(s)
value = quote(EMPTYSTRING.join(value))
if extended:
charset, language, value = decode_rfc2231(value)
new_params.append((name, (charset, language, '"%s"' % value)))
else:
new_params.append((name, '"%s"' % value))
return new_params
def decode_params(params):
"""Decode parameters list according to RFC 2231.
params is a sequence of 2-tuples containing (param name, string value).
"""
# Copy params so we don't mess with the original
params = params[:]
new_params = []
# Map parameter's name to a list of continuations. The values are a
# 3-tuple of the continuation number, the string value, and a flag
# specifying whether a particular segment is %-encoded.
rfc2231_params = {}
name, value = params.pop(0)
new_params.append((name, value))
while params:
name, value = params.pop(0)
if name.endswith('*'):
encoded = True
else:
encoded = False
value = unquote(value)
mo = rfc2231_continuation.match(name)
if mo:
name, num = mo.group('name', 'num')
if num is not None:
num = int(num)
rfc2231_params.setdefault(name, []).append((num, value, encoded))
else:
new_params.append((name, '"%s"' % quote(value)))
if rfc2231_params:
for name, continuations in rfc2231_params.items():
value = []
extended = False
# Sort by number
continuations.sort()
# And now append all values in numerical order, converting
# %-encodings for the encoded segments. If any of the
# continuation names ends in a *, then the entire string, after
# decoding segments and concatenating, must have the charset and
# language specifiers at the beginning of the string.
for num, s, encoded in continuations:
if encoded:
# Decode as "latin-1", so the characters in s directly
# represent the percent-encoded octet values.
# collapse_rfc2231_value treats this as an octet sequence.
s = url_unquote(s, encoding="latin-1")
extended = True
value.append(s)
value = quote(EMPTYSTRING.join(value))
if extended:
charset, language, value = decode_rfc2231(value)
new_params.append((name, (charset, language, '"%s"' % value)))
else:
new_params.append((name, '"%s"' % value))
return new_params