49 lines
1.4 KiB
Python
49 lines
1.4 KiB
Python
|
"""
|
||
|
|
requests._internal_utils
|
||
|
|
~~~~~~~~~~~~~~
|
||
|
|
|
||
|
|
Provides utility functions that are consumed internally by Requests
|
||
|
|
which depend on extremely few external helpers (such as compat)
|
||
|
|
"""
|
||
|
|
import re
|
||
|
|
|
||
|
|
from .compat import builtin_str
|
||
|
|
|
||
|
|
_VALID_HEADER_NAME_RE_BYTE = re.compile(rb"^[^:\s][^:\r\n]*$")
|
||
|
|
_VALID_HEADER_NAME_RE_STR = re.compile(r"^[^:\s][^:\r\n]*$")
|
||
|
|
_VALID_HEADER_VALUE_RE_BYTE = re.compile(rb"^\S[^\r\n]*$|^$")
|
||
|
|
_VALID_HEADER_VALUE_RE_STR = re.compile(r"^\S[^\r\n]*$|^$")
|
||
|
|
|
||
|
|
HEADER_VALIDATORS = {
|
||
|
|
bytes: (_VALID_HEADER_NAME_RE_BYTE, _VALID_HEADER_VALUE_RE_BYTE),
|
||
|
|
str: (_VALID_HEADER_NAME_RE_STR, _VALID_HEADER_VALUE_RE_STR),
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
def to_native_string(string, encoding="ascii"):
|
||
|
|
"""Given a string object, regardless of type, returns a representation of
|
||
|
|
that string in the native string type, encoding and decoding where
|
||
|
|
necessary. This assumes ASCII unless told otherwise.
|
||
|
|
"""
|
||
|
|
if isinstance(string, builtin_str):
|
||
|
|
out = string
|
||
|
|
else:
|
||
|
|
out = string.decode(encoding)
|
||
|
|
|
||
|
|
return out
|
||
|
|
|
||
|
|
|
||
|
|
def unicode_is_ascii(u_string):
|
||
|
|
"""Determine if unicode string only contains ASCII characters.
|
||
|
|
|
||
|
|
:param str u_string: unicode string to check. Must be unicode
|
||
|
|
and not Python 2 `str`.
|
||
|
|
:rtype: bool
|
||
|
|
"""
|
||
|
|
assert isinstance(u_string, str)
|
||
|
|
try:
|
||
|
|
u_string.encode("ascii")
|
||
|
|
return True
|
||
|
|
except UnicodeEncodeError:
|
||
|
|
return False
|