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Merge pull request #2176 from stevvooe/clean-empty-blob-comments

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registry/storage: clean up zero-length blob comments
This commit is contained in:
Aaron Lehmann 2017-01-27 15:42:54 -08:00 committed by GitHub
commit fb0bebc4b6
2 changed files with 6 additions and 6 deletions
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2
registry/storage/blob_test.go
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@ -530,7 +530,7 @@ func TestLayerUploadZeroLength(t *testing.T) {
}
bs := repository.Blobs(ctx)
simpleUpload(t, bs, []byte{}, digestSha256EmptyTar)
simpleUpload(t, bs, []byte{}, digestSha256Empty)
}
func simpleUpload(t *testing.T, bs distribution.BlobIngester, blob []byte, expectedDigest digest.Digest) {

10
registry/storage/blobwriter.go
View file

@ -19,8 +19,8 @@ var (
)
const (
// DigestSha256EmptyTar is the canonical sha256 digest of empty data
digestSha256EmptyTar = "sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
// digestSha256Empty is the canonical sha256 digest of empty data
digestSha256Empty = "sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
)
// blobWriter is used to control the various aspects of resumable
@ -314,7 +314,7 @@ func (bw *blobWriter) moveBlob(ctx context.Context, desc distribution.Descriptor
// If no data was received, we may not actually have a file on disk. Check
// the size here and write a zero-length file to blobPath if this is the
// case. For the most part, this should only ever happen with zero-length
// tars.
// blobs.
if _, err := bw.blobStore.driver.Stat(ctx, bw.path); err != nil {
switch err := err.(type) {
case storagedriver.PathNotFoundError:
@ -322,8 +322,8 @@ func (bw *blobWriter) moveBlob(ctx context.Context, desc distribution.Descriptor
// get a hash, then the underlying file is deleted, we risk moving
// a zero-length blob into a nonzero-length blob location. To
// prevent this horrid thing, we employ the hack of only allowing
// to this happen for the digest of an empty tar.
if desc.Digest == digestSha256EmptyTar {
// to this happen for the digest of an empty blob.
if desc.Digest == digestSha256Empty {
return bw.blobStore.driver.PutContent(ctx, blobPath, []byte{})
}