Archive multiple files with Node and download it immediately

Question

I'm trying to zip multiple files on a server and download it when user requests it. I am using adm-zip to zip files.

Files add perfectly fine and are zipped. zip.writeZip('') zipes files perfectly and saves them to local server. I am just unable to download them. Either way I think it would be better if I could send zip directly via buffer.

router.get(
  "/download-zip/:season_id/:club_id",
  passport.authenticate("jwt", { session: false }),
  (req, res) => {
    FileSubmission.find({
      season: req.params.season_id,
      club: req.params.club_id
    }).then(files => {

      const zip = new AdmZip();

      files.forEach(file => {
        // add local file
        zip.addLocalFile(`uploads/club-uploads/${file.club}/${file.name}`);
      });

      res.download(zip.toBuffer(), "asd.zip");
    });
  }
);

On the front I am using react with actions and js-file-download library

// Download ALL FILES by season ID and club ID
import fileDownload from "js-file-download";

export const downloadAllFiles = (season_id, club_id) => dispatch => {
  axios
    .get(`/api/files/download-zip/${season_id}/${club_id}`)
    .then(response => {
      fileDownload(response.data, `All Files- ${club_id}.zip`);
    })
    .catch(err => {
      console.log(err);
      dispatch({ type: GET_ERRORS, payload: err.response.data });
    });
};

Answer 1

Here's how I managed to create temporary archive, download it and delete it.

Here's back-end

// Create a ZIP of files uploaded by a club
router.get(
  "/download-zip/",
  (req, res) => {
      zip.addLocalFile(/*ADD THE FILES TO ZIP*/);

      zip.writeZip(
        `temp/zips/temp-file.zip`,
        err => {
          if (err) {
            console.log(err);
          }

          res.download(
            `uploads/club-zips/test-file.zip`,
            function(err) {
              if (!err) {
                //delete file after it's been downloaded
                fs.unlinkSync(
                  `uploads/club-zips/test-file-${req.params.club_id}.zip`
                );
              }
            }
          );
        }
      );
    });
  }
);

Here's what I use on front. As I said I used package called js-file-download to download blobs

export const downloadAllFiles = () => dispatch => {
  axios
    .get(`/api/files/download-zip/`, {
      responseType: "arraybuffer"
    })
    .then(response => {
      fileDownload(response.data, `all-files.zip`);
    })
    .catch(err => {
      console.log(err);
    });
};