Server to throttle response to a .zip file request so you can easily work on downloads without filling up your disk

slow-response.js

const express = require('express');
const cwd = process.cwd();
const path = require('path');
const docRoot = cwd;
const app = express();
const port = 3000;
const fs = require('fs');
const Throttle = require('stream-throttle').Throttle;

app.get('/*.zip', async function(request, response, next) {
  const url = new URL(request.url, `http://${request.headers.host}`);
  let pathname = path.join(docRoot, url.pathname);
  const dirname = path.dirname(pathname);
  const fileName = "download.jpg";

  console.log("Handling request for: ", url, pathname);
  let stat = fs.statSync(pathname);

  response.writeHead(200, {
    "Content-Type": "application/octet-stream",
    "Content-Disposition": "attachment; filename=" + fileName,
//    'Content-Length': stat.size
  });

  fs.createReadStream(pathname).pipe(new Throttle({ rate: 1000 })).pipe(response);
});

app.listen(port, () => {
  console.log(`Slow download app listening at http://localhost:${port}`)
});