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Discard null-containing strings before updating the user directory (#12762)

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David Robertson 2022-05-18 11:28:14 +01:00 • committed by Brendan Abolivier
parent 44d7bb13c3
commit c22314c4e8
6 changed files with 45 additions and 11 deletions
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10
synapse/util/stringutils.py
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@ -16,7 +16,7 @@ import itertools
import re
import secrets
import string
from typing import Iterable, Optional, Tuple
from typing import Any, Iterable, Optional, Tuple
from netaddr import valid_ipv6
@ -247,3 +247,11 @@ def base62_encode(num: int, minwidth: int = 1) -> str:
# pad to minimum width
pad = "0" * (minwidth - len(res))
return pad + res
def non_null_str_or_none(val: Any) -> Optional[str]:
"""Check that the arg is a string containing no null (U+0000) codepoints.
If so, returns the given string unmodified; otherwise, returns None.
"""
return val if isinstance(val, str) and "\u0000" not in val else None