node http response.end() status code wrapper

endWrapper.js

async function endResponse( res, code, err ) {
  const enc = 'utf8'
  switch ( code ) {
    case 200:
      res.writeHead( 200 )
      return await res.end( JSON.stringify( {
        status: 200,
        message: 'ok'
      } ), enc )
    case 500:
      res.writeHead( 500 )
      return await res.end( JSON.stringify( {
        status: 500,
        message: 'internal server error',
        enc
      } ), 'utf8' )
    case 405:
      res.writeHead( 405 )
      return await res.end( JSON.stringify( {
        status: 405,
        message: 'invalid method'
      } ), enc )
      break;
    default:

  }
}