Memory leak when the pipe response is disconnected

[pfziom]

When using the pipe method to stream the zip in the API response object, I am facing a memory leak if the download is disconnected or canceled. It works fine when the download is successfully completed.

Here is a code snippet of my usage. I am using loopback 3 for this.

authenticatedRoute.post('/downloadZip', function(req, res, next) {
    try {
      const s3Zip = require('s3-zip');
      const filename = generateFilename();
      const folder = getFolderName(req);
      const fileArray = JSON.parse(req.body.files);
      res.set('content-type', 'application/zip');
      res.set('Content-Disposition', 'attachment; filename=' + filename);
      s3Zip.archive({region: REGION, bucket: BUCKET, preserveFolderStructure: true, debug: true}, folder, fileArray)
        .pipe(res);
    } catch (e) {
      throw e;
    }
  });
  app.use(authenticatedRoute);``

relevant dependency versions in use:

    "compression": "^1.7.4",
    "jwt-decode": "^2.2.0",
    "loopback": "^3.22.0",
    "loopback-boot": "^2.6.5",
    "loopback-component-explorer": "^6.2.0",
    "loopback-ssl": "^1.0.4",
    "s3-zip": "^3.1.0",
    "strong-error-handler": "^3.0.0"

What I was expecting is that if the download from the browser is canceled, the memory used by the s3Zip.archive function would be cleaned up. But that is not happening.

[Ronald Luitwieler]

Are you able to fix this issue in s3-zip?