Unmarshaling time string with json

gistfile1.go

type Timestamp int64

func (ts *Timestamp) UnmarshalJSON(data []byte) os.Error {
	if len(data) < 2 || data[0] != '"' || data[len(data)-1] != '"' {
		return os.NewError("cannot unmarshal non-string into timestamp")
	}
	data = data[1 : len(data)-1]
	t, err := time.Parse(time.RFC3339, string(data))
	if err != nil {
		return err
	}
	*ts = Timestamp(t.Nanoseconds())
	return nil
}

func (ts Timestamp) MarshalJSON() ([]byte, os.Error) {
	t := time.NanosecondsToUTC(int64(ts))
	return []byte(`"` + t.Format(time.RFC3339) + `"`), nil
}