network-speed-tester/src/server.js

A lightweight package to dynamically test ping, upload, and download speeds.

const express = require("express");
const { exec } = require("child_process");
const util = require("util");
const execPromise = util.promisify(exec);

const app = express();
const PORT = 4000;

// Ping endpoint
app.get("/api/ping", async (req, res) => {
  try {
    const { stdout } = await execPromise("ping -c 1 google.com");
    const match = stdout.match(/time=([\d.]+) ms/);
    const ping = match ? parseFloat(match[1]) : null;
    res.json({ ping });
  } catch (error) {
    res.status(500).json({ error: "Ping failed", details: error.message });
  }
});

// Download endpoint
app.get("/api/download", (req, res) => {
  const chunkSize = 50 * 1024 * 1024; // 50 MB
  res.set({
    "Content-Type": "application/octet-stream",
    "Content-Disposition": 'attachment; filename="testfile.bin"',
    "Content-Length": chunkSize.toString(),
    "Cache-Control": "no-cache, no-store, must-revalidate",
    Pragma: "no-cache",
  });
  res.send(Buffer.alloc(chunkSize, "x"));
});

// Upload endpoint
app.post("/api/upload", (req, res) => {
  res.json({ message: "Upload received successfully" });
});

module.exports = {
  startServer: () => {
    app.listen(PORT, () => {
      console.log(
        `Network Speed Tester server running at http://localhost:${PORT}`
      );
    });
  },
  apiUrl: `http://localhost:${PORT}`,
};