File-like objects are closed after uploading

Source boto/boto3#929

This is because we wrap them with the InterruptReader which closes them on exit.

[leogzyl]

I’m using the following workaround:

from io import BufferedReader

class NonCloseableBufferedReader(BufferedReader):
    def close(self):
        self.flush()

buffer = NonCloseableBufferedReader(myfile)
client.upload_fileobj(Fileobj=buffer, Bucket=bucket, Key=name)
buffer.detach()
assert not myfile.closed

[al-muammar]

3 years passed… Can it be either fixed or declared to be not a bug, so other libraries should build workarounds for it?