Cloudflare workers send file to use

Im using workers and javascript, and I’m trying to send a ~20kb file in the response body with the ‘octet-stream’ in the headers…

can you help me?

You can refer to the tutorials here https://developers.cloudflare.com/workers/tutorials/build-a-qr-code-generator

const generate = async request => {
  const { text } = await request.json()
  const headers = { "Content-Type": "image/png" }
  const qr_png = qr.imageSync(text || "https://workers.dev")
  return new Response(qr_png, { headers })
}

Set your headers and then tag it in the new response.