gistfile1.txt

var cookie       = require('cookie')                                                                             
var connectUtils = require('connect').utils

// ----

io.set('authorization', function (data, ack) {                                                                                
   var cookies = cookie.parse(data.headers.cookie)                                                                         
   var signedCookies = connectUtils.parseSignedCookies(cookies, 'YOUR SECRET')                                                  
   redisSession.get(signedCookies['connect.sid'], function (err, sess) {                                                   
      data.session = sess                                                                                                  
      ack(null, data.session)                                                                                              
   })                                                                                                                                                                                                                                              
})