Function normalizeOptions

lib/utils.js:54–88

* Normalizes the common options for all parsers. * * @param {Object} options options to normalize * @param {string | string[] | Function} defaultType default content type(s) or a function to determine it * @returns {Object} * @private

(options, defaultType)

 * @private
 */
function normalizeOptions (options, defaultType) {
  if (!defaultType) {
    // Parsers must define a default content type
    throw new TypeError('defaultType must be provided')
  }

  const inflate = options?.inflate !== false
  const limit = typeof options?.limit === 'undefined' || options?.limit === null
    ? 102400 // 100kb default
    : bytes.parse(options.limit)
  const type = options?.type || defaultType
  const verify = options?.verify || false
  const defaultCharset = options?.defaultCharset || 'utf-8'

  if (limit === null) {
    throw new TypeError(`option limit "${String(options.limit)}" is invalid`)
  }

  if (verify !== false && typeof verify !== 'function') {
    throw new TypeError('option verify must be function')
  }

  // create the appropriate type checking function
  const shouldParse = typeof type !== 'function'
    ? typeChecker(type)
    : type

  return {
    inflate,
    limit,
    verify,
    defaultCharset,
    shouldParse
  }
}

/**
 * Passthrough function that returns input unchanged.