ecstatic/lib/ecstatic/show-dir/perms-to-string.js

A simple static file server middleware that works with both Express and Flatiron

'use strict';

module.exports = function permsToString(stat) {
  if (!stat.isDirectory || !stat.mode) {
    return '???!!!???';
  }

  const dir = stat.isDirectory() ? 'd' : '-';
  const mode = stat.mode.toString(8);

  return dir + mode.slice(-3).split('').map(n => [
    '---',
    '--x',
    '-w-',
    '-wx',
    'r--',
    'r-x',
    'rw-',
    'rwx',
  ][parseInt(n, 10)]).join('');
};