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[#868] blobstor: allow to decompress objects on-the-fly

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We should be able to read whatever we have written earlier.
Compression setting applies only to the new objects.

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
This commit is contained in:
Evgenii Stratonikov 2021-10-07 17:50:36 +03:00 • committed by Leonard Lyubich
parent cc377b34d2
commit dd678cd976
3 changed files with 105 additions and 10 deletions
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4
pkg/local_object_storage/blobstor/compress.go
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@ -4,6 +4,10 @@ import (
"github.com/klauspost/compress/zstd"
)
// zstdFrameMagic contains first 4 bytes of any compressed object
// https://github.com/klauspost/compress/blob/master/zstd/framedec.go#L58 .
var zstdFrameMagic = []byte{0x28, 0xb5, 0x2f, 0xfd}
func noOpCompressor(data []byte) []byte {
return data
}