How To: Reusing body mixin streams

[shellscape]

This is being left here to make it searchable:

If the scenario arises where you absolutely must have a copy of the result stream, .clone can be used before using a body mixin, or body.pipeThrough with a user-defined stream §, such as [TransformStream]https://nodejs.org/api/stream.html#duplex-and-transform-streams.

[restfulhead]

@shellscape I don't think pipeThrough works. It still marks the body as consumed.

console.log(request.bodyUsed)
request.body.pipeThrough(new TextDecoderStream())
console.log(request.bodyUsed)

This prints out false, then true. How can we copy/clone the stream without causing bodyUsed to become true?