Exploring a node.js memory leak with sending files and setting the Content-Length header

server.js

var fs   = require('fs');
var http = require('http');
var file = __dirname + '/index.html';
var connections = {};
var idCouner = 0
var port = 8080;

var handleRequset = function(request, response){
  idCouner++
  var id = idCouner;
  connections[id] = {req: request, res: response};

  response.on('finish', function(){
    delete connections[id];
  });

  fs.stat(file, function(error, stats){
    if(error){ throw error;  }
    response.writeHead(200, [['Content-Length', stats.size]]);

    var fileStream = fs.createReadStream(file);
    fileStream.on('open', function(){
      fileStream.pipe(response);
    });

    fileStream.on('error', function(error){
      console.log(error); // no errors are caught
    });
  });
};

http.createServer(handleRequset).listen(port);

console.log('server running on port ' + port);
setInterval(function(){
  console.log('connections: ' + Object.keys(connections));
}, 5000);

Please move conversation about this issue to nodejs/node#6929