var mime_type = require('mime-types')
  
SendStream.prototype.type = function type (path) {
  var res = this.res

  if (res.getHeader('Content-Type')) return

  // var type = mime.lookup(path)
  var type = mime.getType(path)

  if (!type) {
    debug('no content-type')
    return
  }

  // var charset = mime.charsets.lookup(type)
  var charset = mime_type.charsets(type)

  debug('content-type %s', type)
  res.setHeader('Content-Type', type + (charset ? '; charset=' + charset : ''))
}