Function NewDecoder

expfmt/decode.go:83–95

NewDecoder returns a new decoder based on the given input format. Metric names are validated based on the provided Format -- if the format requires escaping, raditional Prometheues validity checking is used. Otherwise, names are checked for UTF-8 validity. Supported formats include delimited protobu

(r io.Reader, format Format)

// Prometheus text format and is not intended for high-performance applications.
// See: https://github.com/prometheus/common/issues/812
func NewDecoder(r io.Reader, format Format) Decoder {
	scheme := model.LegacyValidation
	if format.ToEscapingScheme() == model.NoEscaping {
		scheme = model.UTF8Validation
	}
	switch format.FormatType() {
	case TypeProtoDelim:
		return &protoDecoder{r: bufio.NewReader(r), s: scheme}
	case TypeProtoText, TypeProtoCompact:
		return &errDecoder{err: fmt.Errorf("format %s not supported for decoding", format)}
	}
	return &textDecoder{r: r, s: scheme}
}

// protoDecoder implements the Decoder interface for protocol buffers.
type protoDecoder struct {