Function contentstream

lib/read.js:151–188

* Get the content stream of the request. * * @param {object} req * @param {function} debug * @param {boolean} [inflate=true] * @return {object} * @api private

(req, debug, inflate)

 */

function contentstream (req, debug, inflate) {
  var encoding = (req.headers['content-encoding'] || 'identity').toLowerCase()
  var length = req.headers['content-length']
  var stream

  debug('content-encoding "%s"', encoding)

  if (inflate === false && encoding !== 'identity') {
    throw createError(415, 'content encoding unsupported', {
      encoding: encoding,
      type: 'encoding.unsupported'
    })
  }

  switch (encoding) {
    case 'deflate':
      stream = zlib.createInflate()
      debug('inflate body')
      req.pipe(stream)
      break
    case 'gzip':
      stream = zlib.createGunzip()
      debug('gunzip body')
      req.pipe(stream)
      break
    case 'identity':
      stream = req
      stream.length = length
      break
    default:
      throw createError(415, 'unsupported content encoding "' + encoding + '"', {
        encoding: encoding,
        type: 'encoding.unsupported'
      })
  }

  return stream
}

/**
 * Dump the contents of a request.