Image to get IP Address

server.js

var fs = require('fs');
var server = require('http').createServer();
var httpPng;

const HTTP_STATUS_OK = 200;
const PNG_FILE_NAME = 'http.png';
const PNG_HEADER = {'Content-Type': 'image/png'};

// Load the file into memory
fs.readFile(PNG_FILE_NAME, function(err, data) {
  if (err) throw err;
  httpPng = data;
});

server.on('request', function(req, res) {
  // Save the requester's address
  fs.appendFile('ips.txt', req.client.address().address + '\n');

  // Serve the image
  if (req.url.indexOf(PNG_FILE_NAME) !== -1) {
    res.writeHead(HTTP_STATUS_OK, PNG_HEADER);
    res.write(httpPng);
  }

  // End the response
  res.end();
});

server.listen(3000);