Get IP address

index.js

const http = require('http')

function getClientIp (req) {
  const forwardedIpsStr = req.headers['x-forwarded-for']
  if (forwardedIpsStr) {
    console.log('forwardedIpsStr: ' + forwardedIpsStr)
    return forwardedIpsStr.split(',')[0]
  }

  console.log('remoteAddress: ' + req.connection.remoteAddress)
  return req.connection.remoteAddress
}

const server = http.createServer((req, res) => {
  res.writeHead(200)
  res.end(getClientIp(req))
})

server.listen(3001, () => {
  console.log('IP Address service is listening on port 3001...')
})