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Viewing file:     add-abort-signal.js (1.58 KB)      -rw-r--r--

'use strict'

const { AbortError, codes } = require('../../ours/errors')
const { isNodeStream, isWebStream, kControllerErrorFunction } = require('./utils')
const eos = require('./end-of-stream')
const { ERR_INVALID_ARG_TYPE } = codes

// This method is inlined here for readable-stream
// It also does not allow for signal to not exist on the stream
// https://github.com/nodejs/node/pull/36061#discussion_r533718029
const validateAbortSignal = (signal, name) => {
  if (typeof signal !== 'object' || !('aborted' in signal)) {
    throw new ERR_INVALID_ARG_TYPE(name, 'AbortSignal', signal)
  }
}
module.exports.addAbortSignal = function addAbortSignal(signal, stream) {
  validateAbortSignal(signal, 'signal')
  if (!isNodeStream(stream) && !isWebStream(stream)) {
    throw new ERR_INVALID_ARG_TYPE('stream', ['ReadableStream', 'WritableStream', 'Stream'], stream)
  }
  return module.exports.addAbortSignalNoValidate(signal, stream)
}
module.exports.addAbortSignalNoValidate = function (signal, stream) {
  if (typeof signal !== 'object' || !('aborted' in signal)) {
    return stream
  }
  const onAbort = isNodeStream(stream)
    ? () => {
        stream.destroy(
          new AbortError(undefined, {
            cause: signal.reason
          })
        )
      }
    : () => {
        stream[kControllerErrorFunction](
          new AbortError(undefined, {
            cause: signal.reason
          })
        )
      }
  if (signal.aborted) {
    onAbort()
  } else {
    signal.addEventListener('abort', onAbort)
    eos(stream, () => signal.removeEventListener('abort', onAbort))
  }
  return stream
}