luckysheet-doc/pages/api/download.ts

import type { NextApiRequest, NextApiResponse } from "next";
import path from "path";

// require modules
const fs = require("fs");
const archiver = require("archiver");

interface IData {
  buildId: string;
}

export default async function handler(
  req: NextApiRequest,
  res: NextApiResponse<IData>
) {
  const queryObject = req.query;
  console.log("download-id", queryObject);

  const storeFile = __dirname + "/luckysheet-custom-build.zip";
  // create a file to stream archive data to.
  const output = fs.createWriteStream(storeFile);

  const archive = archiver("zip", {
    zlib: { level: 9 }, // Sets the compression level.
  });

  // listen for all archive data to be written
  // 'close' event is fired only when a file descriptor is involved
  output.on("close",  ()=> {
    console.log(archive.pointer() + " total bytes");
    console.log(
      "archiver has been finalized and the output file descriptor has closed."
    );

    res.writeHead(200, {
      "Content-Type": "application/octet-stream",
      "Content-Disposition": "attachment; filename=luckysheet-custom-build.zip",
      "Content-Length": archive.pointer(),
    });
    fs.createReadStream(storeFile).pipe(res);

  });

  // This event is fired when the data source is drained no matter what was the data source.
  // It is not part of this library but rather from the NodeJS Stream API.
  // @see: https://nodejs.org/api/stream.html#stream_event_end
  output.on("end", function () {
    console.log("Data has been drained");
  });

  // good practice to catch warnings (ie stat failures and other non-blocking errors)
  archive.on("warning", function (err: any) {
    if (err.code === "ENOENT") {
      // log warning
    } else {
      // throw error
      throw err;
    }
  });

  // good practice to catch this error explicitly
  archive.on("error", function (err: any) {
    throw err;
  });

  // pipe archive data to the file
  archive.pipe(output);

  // append files from a sub-directory, putting its contents at the root of archive
  //   path.join(CURR_DIR, 'luckysheet-custom-build')
  const libFolder = path.join(
    __dirname,
    `../../../../luckysheet-custom-build-${queryObject.buildId}/lib/`
  );
  console.log("libFolder", libFolder);

  // // append a file from buffer
  // const buffer3 = Buffer.from("buff it!");
  // archive.append(buffer3, { name: "file3.txt" });

  archive.directory(libFolder, false);
  // finalize the archive (ie we are done appending files but streams have to finish yet)
  // 'close', 'end' or 'finish' may be fired right after calling this method so register to them beforehand
  archive.finalize();

  // res.status(200).json({ buildId: "download!" });
}