Simple ass rate-limiting express middleware - Probably very naive

rate-limiting.js

/**
 * Rate Limiter
**/

var questers = {};

module.exports = function(limit){
  return function(req, res, next){
    if (questers[req.ip]) return res.status(403).end();

    questers[req.ip] = setTimeout(function(){
      delete questers[req.ip];
    }, limit);

    next();
  };
};

server.js

var rateLimit = require('./middleware/rate-limiter');

app.post('/something'
, rateLimit(2000) // Limit requests to every 2 seconds
, myLittleHandler
)