http.js

var http = require('http')
var fs = require('fs')

function IndexFileExists(){
  var index = ['index.html', 'index.htm', 'default.html', 'default.htm']
  for (var j in index) {
    if(fs.existsSync(index[j])){
      return index[j]
    }
  }
}

http.createServer(function (request, response) {
  console.log(request.url)
  if (request.url === '/' || request.url === '') {
    request.url = IndexFileExists()
  }else{
    request.url = request.url.substring(1, request.url.length)
  }

  var ext = request.url.substring(request.url.lastIndexOf(".") + 1, request.url.length)
  var contentTypes = {
    'text/html': 'html,htm,shtm',
    'text/css': 'css',
    'text/xml': 'xml',
    'image/gif': 'gif',
    'image/jpeg': 'jpeg,jpg',
    'application/x-javascript': 'js',
    'application/atom+xml': 'atom',
    'application/rss+xml': 'rss',
    'text/mathml': 'mml',
    'text/plain': 'txt',
    'text/vnd.sun.j2me.app-descriptor': 'jad',
    'text/vnd.wap.wml': 'wml',
    'text/x-component': 'htc',
    'image/png': 'png',
    'image/tiff': 'tif,tiff',
    'image/vnd.wap.wbmp': 'wbmp',
    'image/x-icon': 'ico',
    'image/x-jng': 'jng',
    'image/x-ms-bmp': 'bmp',
    'image/svg+xml': 'svg,svgz',
    'image/webp': 'webp',
    'application/java-archive': 'jar,war,ear',
    'application/mac-binhex40': 'hqx',
    'application/msword': 'doc',
    'application/pdf': 'pdf',
    'application/postscript': 'ps,eps,ai',
    'application/rtf': 'rtf',
    'application/vnd.ms-excel': 'xls',
    'application/vnd.ms-powerpoint': 'ppt',
    'application/vnd.wap.wmlc': 'wmlc',
    'application/vnd.google-earth.kml+xml': 'kml',
    'application/vnd.google-earth.kmz': 'kmz',
    'application/x-7z-compressed': '7z',
    'application/x-cocoa': 'cco',
    'application/x-java-archive-diff': 'jardiff',
    'application/x-java-jnlp-file': 'jnlp',
    'application/x-makeself': 'run',
    'application/x-perl': 'pl,pm',
    'application/x-pilot': 'prc,pdb',
    'application/x-rar-compressed': 'rar',
    'application/x-redhat-package-manager': 'rpm',
    'application/x-sea': 'sea',
    'application/x-shockwave-flash': 'swf',
    'application/x-stuffit': 'sit',
    'application/x-tcl': 'tcl,tk',
    'application/x-x509-ca-cert': 'der,pem,crt',
    'application/x-xpinstall': 'xpi',
    'application/xhtml+xml': 'xhtml',
    'application/zip': 'zip',
    'application/octet-stream': 'bin,exe,dll,deb,dmg,eot,iso,img,msi,msp,msm',
    'audio/midi': 'mid,midi,kar',
    'audio/mpeg': 'mp3',
    'audio/ogg': 'ogg',
    'audio/x-m4a': 'm4a',
    'audio/x-realaudio': 'ra',
    'video/3gpp': '3gpp,3gp',
    'video/mp4': 'mp4',
    'video/mpeg': 'mpeg,mpg',
    'video/quicktime': 'mov',
    'video/webm': 'webm',
    'video/x-flv': 'flv',
    'video/x-m4v': 'm4v',
    'video/x-mng': 'mng',
    'video/x-ms-asf': 'asx,asf',
    'video/x-ms-wmv': 'wmv',
    'video/x-msideo': 'avi'
  }

  try {
    (function () {
      for (var n in contentTypes) {
        var type = contentTypes[n].split(',')
        for (var i in type) {
          if (type[i] === ext) {
            contentType = n
            return
          }
        }
      }
    })()

    response.writeHead(200, {
      'Content-Type': contentType
    })

    response.end(fs.readFileSync(request.url))
  } catch (e) {
    response.writeHead(404)
    response.end('404')
  }

}).listen(80)