gistfile1.js

// Load required module
var http = require('http');
var fs = require('fs');
var url = require('url');

http.createServer(function(request, response) {
  var pathname = __dirname + url.parse(request.url).pathname;
  
  fs.exists(pathname, function(exists) {
    if (exists) {
      fs.readFile('index.html', function(err, content) {  
        response.end(content);
      });
    } else {
      response.writeHead(404, { "Content-Type": "text/html" });
      response.end("<h1>404 File Not Found</h1>");
    }
  });
}).listen(8080);