No way to get non-metadata headers (e.g. content-range) from StatObject

[skirsten]

The minio.Core GetObject returns the headers but the StatObject does not.

As far as I can tell there is no way to get the headers that are not parsed into stat.Metadata and stat.UserMetadata for the HEAD method.

[klauspost]

@skirsten Which headers are you missing?

[harshavardhana]

The minio.Core GetObject returns the headers but the StatObject does not.

As far as I can tell there is no way to get the headers that are not parsed into stat.Metadata and stat.UserMetadata for the HEAD method.

Please share code, and don't leave us speculating.

[skirsten]

Sorry, here is a complete example:

mc, err := minio.NewCore("...", &minio.Options{
	Creds:  credentials.NewStaticV4("...", "...", ""),
	Secure: true,
})
if err != nil {
	return err
}

options := minio.GetObjectOptions{}

err = options.SetRange(0, 100)
if err != nil {
	return err
}

// For GET we get the headers returned

obj, stat, headers, err := mc.GetObject(ctx, "bucket", "object", options)
if err != nil {
	return err
}
defer obj.Close()

// Need to get the contentRange to get the total size and the actual range that was returned by S3
contentRange := headers.Get("content-range")

fmt.Printf("read size: %d\n", stat.Size)
fmt.Printf("content-range (start-end/total): %s\n", contentRange)

// For the HEAD the headers do not get returned

stat, err = mc.StatObject(ctx, "bucket", "path", options)
if err != nil {
	return err
}

fmt.Printf("read size: %d\n", stat.Size)

return fmt.Errorf("no way to get the headers of the StatObject response")

[klauspost]

It would need to be included in the ObjectInfo.

Parsing Range headers is quite a nightmare, though that would probably be the path to take.