Stream file from source to response in Node.js

stream-file-to-response.js

const http = require("http");
const fs = require("fs");

export default function Sitemap(req, res) {
  const url = `${process.env.NEXT_PUBLIC_API_URL}/sitemap`;

  const request = http.get(url, (response) => {
    const contentType = response.headers["content-type"];

    res.setHeader("Content-Type", contentType);
    response.pipe(res);
  });

  request.on("error", function (e) {
    console.error(e);
  });
}