Node.js http return 200 Page Found Status

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.  ");

    var fileName = pathname.substr(1) || "output.txt";

    console.log(" Search for file : "+fileName);

    // Read the requested file content from file system
    fs.readFile(fileName, function (err, data) {
        if (err) {
            console.log(err);/*from ww  w . ja v a  2s.c o m*/
            // HTTP Status: 404 : NOT FOUND
            // Content Type: text/plain
            response.writeHead(404, {'Content-Type': 'text/html'});
        }else{
            //Page found
            // HTTP Status: 200 : OK
            // Content Type: text/plain
            response.writeHead(200, {'Content-Type': 'text/html'});

            // Write the content of the file to response body
            response.write(data.toString());
        }
        // Send the response body
        response.end();
    });
}).listen(8090);

// Console will print the message
console.log('Server running at http://127.0.0.1:8090/');