docs server that automatically redirects to url with .html if that file exists

gistfile1.txt

var connect = require('connect'), 
  fs = require('fs');

var serve_html = function(root) {
  return function(req,res,next) {
    var path = root + req.url + '.html';
    fs.stat(path,function(err,stat) {
      if (!err && !stat.isDirectory()) {
        res.statusCode = 301;
        res.setHeader('Location', req.url + '.html');
        res.end('Redirecting to ' + req.url + '.html');
        return;
      }
      next();
    });
  }
};

var port = process.env.VCAP_APP_PORT || 3000;
var app = connect()
  .use(connect.logger('dev'))
  .use(connect.static('_site'))
  .use(serve_html('_site'))
  .use(function(req, res){
    res.statusCode = 404;
    res.end('Not found\n');
  })
 .listen(port);
console.log("Listening on %s",port);