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Remove unexpected control codes from ICS files

This commit is contained in:
Will Sowerbutts 2024-07-11 13:38:48 +01:00
parent fe33d79eb1
commit f1d84cea35

View file

@ -49,6 +49,12 @@ def read_components(s: str) -> List[vobject.base.Component]:
s = re.sub(r"^(PHOTO(?:;[^:\r\n]*)?;ENCODING=b(?:;[^:\r\n]*)?:)" s = re.sub(r"^(PHOTO(?:;[^:\r\n]*)?;ENCODING=b(?:;[^:\r\n]*)?:)"
r"data:[^;,\r\n]*;base64,", r"\1", s, r"data:[^;,\r\n]*;base64,", r"\1", s,
flags=re.MULTILINE | re.IGNORECASE) flags=re.MULTILINE | re.IGNORECASE)
# Workaround for bug with malformed ICS files containing control codes
# Filter out all control codes except those we expect to find:
# * 0x09 Horizontal Tab
# * 0x0A Line Feed
# * 0x0D Carriage Return
s = re.sub(r'[\x00-\x08\x0B\x0C\x0E-\x1F]', '', s)
return list(vobject.readComponents(s, allowQP=True)) return list(vobject.readComponents(s, allowQP=True))