func (rbds *redisBlobDescriptorService) setDescriptor(ctx context.Context, conn redis.Conn, dgst digest.Digest, desc distribution.Descriptor) error {
if _, err := conn.Do("HMSET", rbds.blobDescriptorHashKey(dgst),
"digest", desc.Digest,
"size", desc.Size); err != nil {
return err
}
// Only set mediatype if not already set.
if _, err := conn.Do("HSETNX", rbds.blobDescriptorHashKey(dgst),
"mediatype", desc.MediaType); err != nil {
return err
}
return nil
}
// stat provides an internal stat call that takes a connection parameter. This
// allows some internal management of the connection scope.
func (rbds *redisBlobDescriptorService) stat(ctx context.Context, conn redis.Conn, dgst digest.Digest) (distribution.Descriptor, error) {
reply, err := redis.Values(conn.Do("HMGET", rbds.blobDescriptorHashKey(dgst), "digest", "size", "mediatype"))
if err != nil {
return distribution.Descriptor{}, err
}
// NOTE(stevvooe): The "size" field used to be "length". We treat a
// missing "size" field here as an unknown blob, which causes a cache
// miss, effectively migrating the field.
if len(reply) < 3 || reply[0] == nil || reply[1] == nil { // don't care if mediatype is nil
return distribution.Descriptor{}, distribution.ErrBlobUnknown
}
var desc distribution.Descriptor
if _, err := redis.Scan(reply, &desc.Digest, &desc.Size, &desc.MediaType); err != nil {
return distribution.Descriptor{}, err
}
return desc, nil
}
func (rsrbds *repositoryScopedRedisBlobDescriptorService) setDescriptor(ctx context.Context, conn redis.Conn, dgst digest.Digest, desc distribution.Descriptor) error {
if _, err := conn.Do("SADD", rsrbds.repositoryBlobSetKey(rsrbds.repo), dgst); err != nil {
return err
}
if err := rsrbds.upstream.setDescriptor(ctx, conn, dgst, desc); err != nil {
return err
}
// Override repository mediatype.
if _, err := conn.Do("HSET", rsrbds.blobDescriptorHashKey(dgst), "mediatype", desc.MediaType); err != nil {
return err
}
// Also set the values for the primary descriptor, if they differ by
// algorithm (ie sha256 vs tarsum).
if desc.Digest != "" && dgst != desc.Digest && dgst.Algorithm() != desc.Digest.Algorithm() {
if err := rsrbds.setDescriptor(ctx, conn, desc.Digest, desc); err != nil {
return err
}
}
return nil
}