Node.js HTTP client for ESP8266 Load Test

client.js

const http = require('http');

const printHeaders = (() => {
  let printed = false
  return () => {
    if (printed) return
    console.log('timestamp, kbps')
    printed = true;
  }
})();

function start() {
  const req = http.get('http://esp-load-test.local/', (res) => {
    printHeaders();
    
    let dataSize = 0
    res.on('data', (data) => {
      dataSize += data.length
    })

    res.on('error', handleError)

    const intervalHandler = setInterval(() => {
      if (dataSize === 0) {
        req.abort()
        clearInterval(intervalHandler)
        start()
      }

      const speed = dataSize/1024/10
      dataSize = 0
      console.log(`${Date.now()}, ${speed}`)
    }, 1000 * 10)
  })
    .on('error', handleError)

  function handleError(err) {
    console.error(err.message)
    start()
  }
}

start();

Excuse me, Sir, I want to make an APP that user press button on web page that created with node.js cloud server to turn on/off bulb controlled by ESP8266, how to write server side codes? I will be very appreciated if you can help... My Email: stephenlai2015@gmail.com