Function splitLabels

handler/push.go:181–210

splitLabels splits a labels string into a label map mapping names to values.

(labels string)

// splitLabels splits a labels string into a label map mapping names to values.
func splitLabels(labels string) (map[string]string, error) {
	result := map[string]string{}
	if len(labels) <= 1 {
		return result, nil
	}
	components := strings.Split(labels[1:], "/")
	if len(components)%2 != 0 {
		return nil, fmt.Errorf("odd number of components in label string %q", labels)
	}

	for i := 0; i < len(components)-1; i += 2 {
		name, value := components[i], components[i+1]
		trimmedName := strings.TrimSuffix(name, Base64Suffix)
		unescapedName := model.UnescapeName(trimmedName, EscapingScheme)
		if !ValidationScheme.IsValidLabelName(unescapedName) ||
			strings.HasPrefix(trimmedName, model.ReservedLabelPrefix) {
			return nil, fmt.Errorf("improper label name %q", trimmedName)
		}
		if name == trimmedName {
			result[unescapedName] = value
			continue
		}
		decodedValue, err := decodeBase64(value)
		if err != nil {
			return nil, fmt.Errorf("invalid base64 encoding for label %s=%q: %v", trimmedName, value, err)
		}
		result[unescapedName] = decodedValue
	}
	return result, nil
}