Share files locally in very high speed.

shareNode.js

const cluster = require('cluster');

if (cluster.isMaster) {
  cluster.fork();

  cluster.on('exit', function(worker, code, signal) {
    cluster.fork();
  });
}

if (cluster.isWorker) {
    const express = require('express');
    const fs = require('fs');
    const path = require('path');
    const { lstatSync, readdirSync } = require('fs');
    const os = require('os');
    const { join } = require('path');
    const ifaces = os.networkInterfaces();

    const app = express();

    let localIP = "";

    // To get your local IP such that other can access the file via this ...
    Object.keys(ifaces).forEach(function (ifname) {
        let alias = 0;
        ifaces[ifname].forEach(function (iface) {
            if ('IPv4' !== iface.family || iface.internal !== false) {
                return;
            }
            localIP = iface.address;
            ++alias;
        });
    });

    app.get("/download/:fileName",(req , res) => {
        const fileName = req.params.fileName;
        const srcPath = `${__dirname}/uploads/${fileName}`;

        // Find a way to encrypt file ... Not by writing ...

        const readStream = fs.createReadStream(srcPath);
        res.writeHead(200, {
            'Content-Type': 'application/octet-stream'
        });
        readStream.pipe(res);
    });

    app.get("/allDownloads", (req, res) => {
        let files = ["Mind the filenames, They are case sensitive ... -> ","      ", "The files you can download are :::     "];
        fs.readdirSync(`${__dirname}/uploads`).forEach(file => {
            files.push(file);
        })
        res.send(files);
    });

    app.listen(process.env.PORT || 3000, localIP);
}