You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
37 lines
1.1 KiB
Python
37 lines
1.1 KiB
Python
import codecs
|
|
import locale
|
|
import re
|
|
import sys
|
|
from typing import List, Tuple
|
|
|
|
BOMS: List[Tuple[bytes, str]] = [
|
|
(codecs.BOM_UTF8, "utf-8"),
|
|
(codecs.BOM_UTF16, "utf-16"),
|
|
(codecs.BOM_UTF16_BE, "utf-16-be"),
|
|
(codecs.BOM_UTF16_LE, "utf-16-le"),
|
|
(codecs.BOM_UTF32, "utf-32"),
|
|
(codecs.BOM_UTF32_BE, "utf-32-be"),
|
|
(codecs.BOM_UTF32_LE, "utf-32-le"),
|
|
]
|
|
|
|
ENCODING_RE = re.compile(rb"coding[:=]\s*([-\w.]+)")
|
|
|
|
|
|
def auto_decode(data: bytes) -> str:
|
|
"""Check a bytes string for a BOM to correctly detect the encoding
|
|
|
|
Fallback to locale.getpreferredencoding(False) like open() on Python3"""
|
|
for bom, encoding in BOMS:
|
|
if data.startswith(bom):
|
|
return data[len(bom) :].decode(encoding)
|
|
# Lets check the first two lines as in PEP263
|
|
for line in data.split(b"\n")[:2]:
|
|
if line[0:1] == b"#" and ENCODING_RE.search(line):
|
|
result = ENCODING_RE.search(line)
|
|
assert result is not None
|
|
encoding = result.groups()[0].decode("ascii")
|
|
return data.decode(encoding)
|
|
return data.decode(
|
|
locale.getpreferredencoding(False) or sys.getdefaultencoding(),
|
|
)
|