test-server.js

// Simple static file server
// node server.js (portNumber)
var http = require("http")
var fs = require("fs")
var path = require("path")

const port = process.argv[2] || 3000
const home = __dirname

const extToType = {
  ".ico": "image/x-icon",
  ".html": "text/html",
  ".js": "text/javascript",
  ".json": "application/json",
  ".css": "text/css",
  ".png": "image/png",
  ".jpg": "image/jpeg",
  ".wav": "audio/wav",
  ".mp3": "audio/mpeg",
  ".svg": "image/svg+xml",
  ".pdf": "application/pdf",
  ".doc": "application/msword",
}

const server = http.createServer((req, res) => {
  console.log(
    `${new Date().toLocaleTimeString([], {
      hour: "numeric",
      minute: "2-digit",
      second: "numeric",
      fractionalSecondDigits: 2,
    })} - ${req.method}: ${req.url}`
  )

  try {
    const filePath = path.join(home, req.url === "/" ? "index.html" : req.url)
    const extname = path.extname(filePath)
    const contentType = extToType[extname]

    fs.readFile(filePath, (err, data) => {
      if (!err) {
        res.writeHead(200, {
          ...(contentType && { "Content-Type": contentType }),
        })
        res.end(data)
      } else {
        res.writeHead(404)
        res.end(`404 ${filePath} not found`)
      }
    })
  } catch (err) {
    res.writeHead(500)
    res.end(`500 server error: ${err}`)
  }
})

server.listen(port, () => {
  console.log(`Server running at http://localhost:${port}`)
})