func (ld *v2LayerDescriptor) open(ctx context.Context) (distribution.ReadSeekCloser, error) {
if len(ld.src.URLs) == 0 {
blobs := ld.repo.Blobs(ctx)
return blobs.Open(ctx, ld.digest)
}
var (
err error
rsc distribution.ReadSeekCloser
)
// Find the first URL that results in a 200 result code.
for _, url := range ld.src.URLs {
logrus.Debugf("Pulling %v from foreign URL %v", ld.digest, url)
rsc = transport.NewHTTPReadSeeker(http.DefaultClient, url, nil)
_, err = rsc.Seek(0, os.SEEK_SET)
if err == nil {
break
}
logrus.Debugf("Download for %v failed: %v", ld.digest, err)
rsc.Close()
rsc = nil
}
return rsc, err
}
func (bs *blobs) Open(ctx context.Context, dgst digest.Digest) (distribution.ReadSeekCloser, error) {
stat, err := bs.statter.Stat(ctx, dgst)
if err != nil {
return nil, err
}
blobURL, err := bs.ub.BuildBlobURL(bs.name, stat.Digest)
if err != nil {
return nil, err
}
return transport.NewHTTPReadSeeker(bs.client, blobURL, stat.Size), nil
}
func (bs *blobs) Open(ctx context.Context, dgst digest.Digest) (distribution.ReadSeekCloser, error) {
blobURL, err := bs.ub.BuildBlobURL(bs.name, dgst)
if err != nil {
return nil, err
}
return transport.NewHTTPReadSeeker(bs.client, blobURL,
func(resp *http.Response) error {
if resp.StatusCode == http.StatusNotFound {
return distribution.ErrBlobUnknown
}
return HandleErrorResponse(resp)
}), nil
}
func (r *registry) getBlob(ctx context.Context, name reference.Named, dgst digest.Digest) ([]byte, error) {
ref, err := reference.WithDigest(name, dgst)
if err != nil {
return nil, err
}
blobURL, err := r.ub.BuildBlobURL(ref)
if err != nil {
return nil, err
}
reader := transport.NewHTTPReadSeeker(r.client, blobURL,
func(resp *http.Response) error {
if resp.StatusCode == http.StatusNotFound {
return distribution.ErrBlobUnknown
}
return client.HandleErrorResponse(resp)
})
defer reader.Close()
return ioutil.ReadAll(reader)
}