mirror of https://github.com/morpheus65535/bazarr
105 lines
3.4 KiB
Python
105 lines
3.4 KiB
Python
"""
|
|
_url.py
|
|
websocket - WebSocket client library for Python
|
|
|
|
Copyright 2021 engn33r
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
"""
|
|
__all__ = ["NoLock", "validate_utf8", "extract_err_message", "extract_error_code"]
|
|
|
|
|
|
class NoLock:
|
|
|
|
def __enter__(self):
|
|
pass
|
|
|
|
def __exit__(self, exc_type, exc_value, traceback):
|
|
pass
|
|
|
|
|
|
try:
|
|
# If wsaccel is available we use compiled routines to validate UTF-8
|
|
# strings.
|
|
from wsaccel.utf8validator import Utf8Validator
|
|
|
|
def _validate_utf8(utfbytes):
|
|
return Utf8Validator().validate(utfbytes)[0]
|
|
|
|
except ImportError:
|
|
# UTF-8 validator
|
|
# python implementation of http://bjoern.hoehrmann.de/utf-8/decoder/dfa/
|
|
|
|
_UTF8_ACCEPT = 0
|
|
_UTF8_REJECT = 12
|
|
|
|
_UTF8D = [
|
|
# The first part of the table maps bytes to character classes that
|
|
# to reduce the size of the transition table and create bitmasks.
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
|
|
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
|
|
8,8,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
|
|
10,3,3,3,3,3,3,3,3,3,3,3,3,4,3,3, 11,6,6,6,5,8,8,8,8,8,8,8,8,8,8,8,
|
|
|
|
# The second part is a transition table that maps a combination
|
|
# of a state of the automaton and a character class to a state.
|
|
0,12,24,36,60,96,84,12,12,12,48,72, 12,12,12,12,12,12,12,12,12,12,12,12,
|
|
12, 0,12,12,12,12,12, 0,12, 0,12,12, 12,24,12,12,12,12,12,24,12,24,12,12,
|
|
12,12,12,12,12,12,12,24,12,12,12,12, 12,24,12,12,12,12,12,12,12,24,12,12,
|
|
12,12,12,12,12,12,12,36,12,36,12,12, 12,36,12,12,12,12,12,36,12,36,12,12,
|
|
12,36,12,12,12,12,12,12,12,12,12,12, ]
|
|
|
|
def _decode(state, codep, ch):
|
|
tp = _UTF8D[ch]
|
|
|
|
codep = (ch & 0x3f) | (codep << 6) if (
|
|
state != _UTF8_ACCEPT) else (0xff >> tp) & ch
|
|
state = _UTF8D[256 + state + tp]
|
|
|
|
return state, codep
|
|
|
|
def _validate_utf8(utfbytes):
|
|
state = _UTF8_ACCEPT
|
|
codep = 0
|
|
for i in utfbytes:
|
|
state, codep = _decode(state, codep, i)
|
|
if state == _UTF8_REJECT:
|
|
return False
|
|
|
|
return True
|
|
|
|
|
|
def validate_utf8(utfbytes):
|
|
"""
|
|
validate utf8 byte string.
|
|
utfbytes: utf byte string to check.
|
|
return value: if valid utf8 string, return true. Otherwise, return false.
|
|
"""
|
|
return _validate_utf8(utfbytes)
|
|
|
|
|
|
def extract_err_message(exception):
|
|
if exception.args:
|
|
return exception.args[0]
|
|
else:
|
|
return None
|
|
|
|
|
|
def extract_error_code(exception):
|
|
if exception.args and len(exception.args) > 1:
|
|
return exception.args[0] if isinstance(exception.args[0], int) else None
|