package timeutils import ( "errors" "time" ) const ( // RFC3339NanoFixed is our own version of RFC339Nano because we want one // that pads the nano seconds part with zeros to ensure // the timestamps are aligned in the logs. RFC3339NanoFixed = "2006-01-02T15:04:05.000000000Z07:00" // JSONFormat is the format used by FastMarshalJSON JSONFormat = `"` + time.RFC3339Nano + `"` ) // FastMarshalJSON avoids one of the extra allocations that // time.MarshalJSON is making. func FastMarshalJSON(t time.Time) (string, error) { if y := t.Year(); y < 0 || y >= 10000 { // RFC 3339 is clear that years are 4 digits exactly. // See golang.org/issue/4556#c15 for more discussion. return "", errors.New("time.MarshalJSON: year outside of range [0,9999]") } return t.Format(JSONFormat), nil }