node_modules/union/examples/simple/simple.js

var fs = require('fs'),
    path = require('path'),
    union = require('../../lib'),
    director = require('director'),
    favicon = require('./middleware/favicon');

var router = new director.http.Router();

var server = union.createServer({
  before: [
    favicon(path.join(__dirname, 'favicon.png')),
    function (req, res) {
      var found = router.dispatch(req, res);
      if (!found) {
        res.emit('next');
      }
    }
  ]
});

router.get('/foo', function () {
  this.res.writeHead(200, { 'Content-Type': 'text/plain' });
  this.res.end('hello world\n');
});

router.post('/foo', { stream: true }, function () {
  var req = this.req,
      res = this.res,
      writeStream;

  writeStream = fs.createWriteStream(__dirname + '/' + Date.now() + '-foo.txt');
  req.pipe(writeStream);

  writeStream.on('close', function () {
    res.writeHead(200, { 'Content-Type': 'text/plain' });
    res.end('wrote to a stream!');
  });
});

router.get('/redirect', function () {
  this.res.redirect('http://www.google.com');
});

router.get('/custom_redirect', function () {
  this.res.redirect('/foo', 301);
});

router.get('/async', function () {
  var self = this;
  process.nextTick(function () {
    self.req.on('end', function () {
      self.res.end();
    })
    self.req.buffer = false;
  });
});

server.listen(9090);
console.log('union with director running on 9090');