reuse of an ldap client

ldap_reuse.js

var ldap = require('ldapjs')
  , port = 1389
  , host = '127.0.0.1'
;

var server = ldap.createServer();
var client;

var showFailure = process.argv.indexOf('fail') > -1;
var serverDelay = 100;
var clientDelay = showFailure ? serverDelay/2 : serverDelay*6;

console.log("SHOWING FAILURE: ", showFailure);

function userAuth(client, id){
  client.bind('cn=admin,o=example', 'password', function(err){
    if (err) return console.log(id, ": admin bind failed: ", err);
    console.log(id, ": admin bind successful, unbinding");

    client.unbind();
    client.bind('cn=someuser,o=example', 'apassword', function(err){
      if (err) return console.log(id, ": user bind failed: ", err);

      console.log(id, ": user auth successful, unbinding");
      client.unbind();
    });
  });
}

server.listen(port, '127.0.0.1', function() {
  console.log("LDAP server listening on port " + port + " of " + host)

  client = ldap.createClient({
    url: ['ldap://', host, ':', port].join('')
  });

  // connect to ldap server and make parallel overlapping requests, with each one unbinding
  userAuth(client, 'client1');

  setTimeout(function() {
    userAuth(client, 'client2');
  },clientDelay);
});

server.bind('o=example', function(req, res, next){
  //console.log("Bind DN: ", req.dn.toString(), " binding!");
  setTimeout(function(){
    //console.log("Bind DN: ", req.dn.toString(), " bound!");
    //console.log("unbinding!");

    res.end();
  },serverDelay);
});

package.json

{
  "dependencies": {
    "ldapjs": "~0.7.0"
  }
}