gistfile1.js

* In 'funcs.js':
module.exports = {
  generatePseudoRandomToken: generatePseudoRandomToken,
  cookieWatcher: cookieWatcher
};

function generatePseudoRandomToken() {
  require('crypto').randomBytes(48, function(ex, buf) {
    var token = buf.toString('hex');
  });
}

function cookieWatcher( req, res ) {
    var coo = req.cookies.sessionLiState
    if ( typeof( coo ) == "undefined" ) {
      // nohas?
      res.cookie("sessionLiState", generatePseudoRandomToken() )
    } else {
      // has?                                                                                                      
      console.log( "auth cookieWatcher found: " + coo )
    }
}

(EOF 'funcs.js')
...
* In app.js:

...
var someFuncs = require('funcs.js')
...
app.use("/", function( req, res) {
  someFuncs.cookieWatcher( req, res );
})
...