NodeJS basic authentication without framework.

auth.js

var http = require('http');

http.createServer(function (req, res) {

    // get authorization data
    var header=req.headers['authorization'] ||'',
      token=header.split(/\s+/).pop()||'',
      auth=new Buffer(token, 'base64').toString(),
      parts=auth.split(/:/),
      username=parts[0],
      password=parts[1];

    // check username and password
    if (username != 'admin' || password != 'admin') {
      res.writeHead(401, {
        'WWW-Authenticate': 'Basic realm="Admin"'
      });
      return res.end('401 Unauthorized');
    }
		
    // authorized
    res.writeHead(200, { 'Content-Type': 'text/plain'});
    res.end('Welcome Admin!');
});