Failed to copy manifest with 0 size config

[northtyphoon]

I tried to copy a manifest from registry binducentralus.azurecr.io/samples/artifact:1.0. This manifest has a config whose size is 0.

{
  "schemaVersion": 2,
  "config": {
    "mediaType": "application/vnd.unknown.config.v1+json",
    "digest": "sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
    "size": 0
  },
  "layers": [
    {
      "mediaType": "application/vnd.unknown.layer.v1+txt",
      "digest": "sha256:6291bbe45f529c52451285872d5fce81296aafac2190634d6f2e17c08c2e3dcb",
      "size": 44,
      "annotations": {
        "org.opencontainers.image.title": "artifact.txt"
      }
    }
  ]
}

The following code failed as 400 bad request.

src, err := remote.NewRepository("binducentralus.azurecr.io/samples/artifact:1.0")
dest := file.New("temp")
desc, err := oras.Copy(ctx, src, src.Reference.Reference, dest, "")

The problem was the invalid range header value (bytes=0--1) in the download request due to

oras-go/registry/remote/repository.go

Line 447 in c34895e

req.Header.Set("Range", fmt.Sprintf("bytes=0-%d", target.Size-1))

.

[wangxiaoxuan273]

Please assign this issue to me, thanks

[shizhMSFT]

Resolved by #145