帮我生成一个js文件，我需要实现一个http服务器

const http = require('http')
const url = require('url')
const path = require('path')
const fs = require('fs')

const mimeTypes = {
  '.html': 'text/html',
  '.js': 'text/javascript',
  '.css': 'text/css',
  '.json': 'application/json',
  '.png': 'image/png',
  '.jpg': 'image/jpg',
  '.gif': 'image/gif',
  '.svg': 'image/svg+xml',
  '.wav': 'audio/wav',
  '.mp4': 'video/mp4',
  '.woff': 'application/font-woff',
  '.ttf': 'application/font-ttf',
  '.eot': 'application/vnd.ms-fontobject',
  '.otf': 'application/font-otf',
  '.wasm': 'application/wasm'
}

http.createServer(function (req, res) {
  var pathname = path.join(__dirname, url.parse