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Handle invalid upload of text fd more gracefully

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Lonami Exo
2019-12-27 12:05:27 +01:00
parent bdb74ac235
commit a142b7de5e
2 changed files with 6 additions and 1 deletions
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2
telethon/utils.py
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@@ -741,7 +741,7 @@ def _get_extension(file):
elif isinstance(file, bytes):
kind = imghdr.what(io.BytesIO(file))
return ('.' + kind) if kind else ''
elif isinstance(file, io.IOBase) and file.seekable():
elif isinstance(file, io.IOBase) and not isinstance(file, io.TextIOBase) and file.seekable():
kind = imghdr.what(file)
return ('.' + kind) if kind is not None else ''
elif getattr(file, 'name', None):