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'use strict';
const {
AbortError,
codes,
} = require('internal/errors');
const eos = require('internal/streams/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 isStream(obj) {
return !!(obj && typeof obj.pipe === 'function');
}
module.exports.addAbortSignal = function addAbortSignal(signal, stream) {
validateAbortSignal(signal, 'signal');
if (!isStream(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;
};
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