gistfile1.txt

var fs = require('fs');   
var http = require('http');  
var Buffer = require('buffer').Buffer;   
var gif;
fs.readFile(__filename, function (err, data)
{
 if (err) throw err;
  gif = new Buffer(data, 'utf8');
});

http.createServer(function (req, res)
{
 res.writeHead(200, {'Content-Type' : 'image/gif'});
 req.setEncoding('binary');
 res.write(gif);
 res.end();
 // Do db magic after the request is sent.
}).listen(91);



----
simple script same error

/var/www/nodejs-mongodb-app/files_page.js:8
  gif = new Buffer(data, 'utf8');
        ^
TypeError: Bad argument
    at /var/www/nodejs-mongodb-app/files_page.js:8:9
    at fs:83:13
    at node.js:255:9