wildcard.js

/*
to run:

   echo '{}' > package.json
   npm install --save express
   node wildcard.js

*/

var express = require('express')
  , http    = require('http')
;

var app = express();

app.get(/^(.*)$/, function(req, res, next){
  res.send(req.params[0]);
});

http.createServer(app).listen(1234, function() {
  console.log("Listening on port 1234");
});