a958fe86d7
Co-authored-by: badrAZ <azizbibadr@gmail.com> Co-authored-by: Mathieu <70369997+MathieuRA@users.noreply.github.com>
29 lines
723 B
JavaScript
29 lines
723 B
JavaScript
const eos = require('end-of-stream')
|
|
const { PassThrough } = require('stream')
|
|
|
|
// create a new readable stream from an existing one which may be piped later
|
|
//
|
|
// in case of error in the new readable stream, it will simply be unpiped
|
|
// from the original one
|
|
exports.forkStreamUnpipe = function forkStreamUnpipe(stream) {
|
|
const { forks = 0 } = stream
|
|
stream.forks = forks + 1
|
|
|
|
const proxy = new PassThrough()
|
|
stream.pipe(proxy)
|
|
eos(stream, error => {
|
|
if (error !== undefined) {
|
|
proxy.destroy(error)
|
|
}
|
|
})
|
|
eos(proxy, _ => {
|
|
stream.forks--
|
|
stream.unpipe(proxy)
|
|
|
|
if (stream.forks === 0) {
|
|
stream.destroy(new Error('no more consumers for this stream'))
|
|
}
|
|
})
|
|
return proxy
|
|
}
|