writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
		return
	}

	getObjectNInfo := objectAPI.GetObjectNInfo

	// Get request range.
	var rs *HTTPRangeSpec
	var rangeErr error
	rangeHeader := r.Header.Get(xhttp.Range)
	if rangeHeader != "" {
		// Both 'Range' and 'partNumber' cannot be specified at the same time
		if opts.PartNumber > 0 {

	compareMeta1 := make(map[string]string)
	for k, v := range oi1.UserDefined {
		var found bool
		for _, prefix := range compareKeys {
			if !stringsHasPrefixFold(k, prefix) {
				continue
			}
			found = true
			break
		}
		if found {
			compareMeta1[strings.ToLower(k)] = v
		}
	}

	compareMeta2 := make(map[string]string)
	for k, v := range oi2.Metadata {
		var found bool