reader: use io.ReadFull instead of Reader.Read to read footer length #326
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Signed-off-by: glorv <glorvs@163.com>
This was referenced Oct 9, 2020
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use
io.ReadFullinstead of reader.Read to make sure exactly n bytes is read. In s3 environment, theReader.Readcall may not return enough bytes since the interface comment of Reader.Read allow this behavior.