Node.js http serve file via fs readFile()

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

// Create a Server
http.createServer(function (request, response) {
  // Parse the request containing file name
  var pathname = url.parse(request.url).pathname;
  // Print the name of the file for which request is made.
   console.log("Request for " + pathname + " received.");
  // Read the requested file content from file system
  fs.readFile(pathname.substr(1), function(err, data) {
    if (err) {/*from   w  w w  .jav a 2s. c o m*/
      console.log(err);
      // HTTP Status 404: NOT FOUND
      // Content Type: text/html
      response.writeHead(404, {'Content-Type': 'text/html'});
    } else {
      // HTTP Status 200: OK
      // Content Type: text/html
      response.writeHead(200, {'Content-Type': 'text/html'});
      // Write the content of the file to response
      response.write(data.toString());
    }
    // Send the response bod
    response.end();
  });
}).listen(8081);

// Print the message
console.log('Server is now running at http://127.0.0.1:8081');