Function read

lib/read.js:39–173

* Read a request into a buffer and parse. * * @param {Object} req * @param {Object} res * @param {Function} next * @param {Function} parse * @param {Function} debug * @param {Object} options * @private

(req, res, next, parse, debug, options)

 * @private
 */
function read (req, res, next, parse, debug, options) {
  if (onFinished.isFinished(req)) {
    debug('body already parsed')
    next()
    return
  }

  if (!('body' in req)) {
    req.body = undefined
  }

  // skip requests without bodies
  if (!hasBody(req)) {
    debug('skip empty body')
    next()
    return
  }

  debug('content-type %j', req.headers['content-type'])

  // determine if request should be parsed
  if (!options.shouldParse(req)) {
    debug('skip parsing')
    next()
    return
  }

  let encoding = null
  if (options?.skipCharset !== true) {
    encoding = getCharset(req) || options.defaultCharset

    // validate charset
    if (!!options?.isValidCharset && !options.isValidCharset(encoding)) {
      debug('invalid charset')
      next(createError(415, 'unsupported charset "' + encoding.toUpperCase() + '"', {
        charset: encoding,
        type: 'charset.unsupported'
      }))
      return
    }
  }

  let length
  const opts = options
  let stream

  // read options
  const verify = opts.verify

  try {
    // get the content stream
    stream = contentstream(req, debug, opts.inflate)
    length = stream.length
    stream.length = undefined
  } catch (err) {
    return next(err)
  }