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add-abort-signal.js
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add-abort-signal.js
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'use strict'
const { AbortError, codes } = require('../../ours/errors')
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)
}
}
function isNodeStream(obj) {
return !!(obj && typeof obj.pipe === 'function')
}
module.exports.addAbortSignal = function addAbortSignal(signal, stream) {
validateAbortSignal(signal, 'signal')
if (!isNodeStream(stream)) {
throw new ERR_INVALID_ARG_TYPE('stream', 'stream.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 = () => {
stream.destroy(
new AbortError(undefined, {
cause: signal.reason
})
)
}
if (signal.aborted) {
onAbort()
} else {
signal.addEventListener('abort', onAbort)
eos(stream, () => signal.removeEventListener('abort', onAbort))
}
return stream
}