How to use the connect.sid function in connect

io.set('authorization', function (data, accept) {
  // http://www.danielbaulig.de/socket-ioexpress/
  if (!data.headers.cookie) {
    return accept('No cookie transmitted.', false);
  }
  //data.cookie = cookie.parse(decodeURIComponent(data.headers.cookie));
  data.cookie = cookie.parse(data.headers.cookie);
  //data.cookie = cookie.parseSignedCookies(data.cookie, config.SESSION_SECRET);
  console.log(data.cookie['connect.sid']);
  data.sessionID = data.cookie['connect.sid'].substring(2,26);
  console.log(data.sessionID);
  // save the session store to the data object
  // (as required by the Session constructor)
  data.sessionStore = sessionStore;
  console.log(sessionStore);
  sessionStore.get(data.sessionID, function (err, session) {
    if (err) {
      accept(err, false);
    } else if (!session) {
      accept('No session', false);
    } else {
      // create a session object, passing data as request and our
      // just acquired session data
      var Session = connect.middleware.session.Session;
      data.session = new Session(data, session);

var processSession = function(socket, secret) {
  try {
    var cookie_obj = qs.parse(socket.request.headers.cookie, ';');
    // for reasons mysterious the connect.sid key sometimes comes with 1 leading whitespace
    var cursor = cookie_obj['connect.sid'] ? cookie_obj['connect.sid'] : cookie_obj[' connect.sid'];
    socket.sessionId = cookieParser.signedCookie(cursor, secret);
    return true;
  }
  catch(e) {
    log.warn('Warning: connect.sid session cookie not detected. User may have cookies disabled or session cookie has expired');
    return false;
  }
};

cookieParser(config.sessionSecret)(socket.request, {}, function(err) {
        	// Get the session id from the request cookies
            var sessionId = socket.request.signedCookies['connect.sid'];

            // Use the mongoStorage instance to get the Express session information
            mongoStore.get(sessionId, function(err, session) {
            	// Set the Socket.io session information
                socket.request.session = session;

                // Use Passport to populate the user details
                passport.initialize()(socket.request, {}, function() {
                	passport.session()(socket.request, {}, function() {
                		if (socket.request.user) {
                			next(null, true);
                		} else {
                			next(new Error('User is not authenticated'), false);
                		}
                	});
                });

io.set('authorization', function (handshakeData, accept) {
    // 通过客户端的cookie字符串来获取其session数据
    let ccc = ''
    if (handshakeData.headers && handshakeData.headers.cookie) {
      ccc = handshakeData.headers.cookie
    }
    handshakeData.cookie = Cookie.parse(ccc)
    let connectSid = parseSignedCookie(handshakeData.cookie['connect.sid'], 'wyq')
    if (connectSid) {
      storeMemory.get(connectSid, function (error, session) {
        if (error) {
          // if we cannot grab a session, turn down the connection
          accept(error.message, false)
        } else {
          // save the session data and accept the connection
          handshakeData.session = new Session(handshakeData, session)
          handshakeData.connect_sid = connectSid
          accept(null, true)
        }
      })
    } else {
      accept('nosession')
    }
  })

io.use(function(socket, next){
    var handshakeData = socket.request;
    if (!handshakeData.headers.cookie) {
      return next(new Error('no cookie.'));
    }
    handshakeData.cookie = cookie.parse(handshakeData.headers.cookie);
    var sid = handshakeData.cookie['connect.sid'];
    if (!sid) {
      return next(new Error('no sid.'));
    }
    sessionStore.get(sid.split(':')[1].split('.')[0], function(err, session){
      if (err) {
        return next(err);
      }
      if (!session) {
        return next('no session.');
      }
      socket.session = session;
      next();
    });
  });

router.post('/add-to-cart/', function (req, res, next) {

    //Retrieving item id and qty for secure reasons
    var item = req.body;
    var cartID = req.cookies['user.id'] || req.cookies['connect.sid'];

    //Search for item in store items by ID
    Item.findById(item.id, function (err, result) {
        if (err) {
            return next(err)
        }
        return result;
    }).then(function (result) {

        checkForExistingCart(cartID, function (response) {
            var cart;

            if(response){
                console.log("\nCart found. Start working with existing cart. \n");

                //Using existing cart

io.set('authorization', function(handshakeData, accept) {
  handshakeData.cookie = Cookie.parse(handshakeData.headers.cookie)
  var connectSid = handshakeData.cookie['connect.sid']
  connectSid = parseSignedCookie(connectSid, 'technode')

  if (connectSid) {
    sessionStore.get(connectSid, function(error, session) {
      if (error) {
        accept(error.message, false)
      } else {
        handshakeData.session = session
        accept(null, true)
      }
    })
  } else {
    accept('No session')
  }
})

signedCookieParser(handshakeData, {}, function(err) {
    if (err) {
      accept(err, false)
    } else {
      sessionStore.get(handshakeData.signedCookies['connect.sid'], function(err, session) {
        if (err) {
          accept(err.message, false)
        } else {
          handshakeData.session = session
          if (session._userId) {
            accept(null, true)
          } else {
            accept('No login')
          }
        }
      })
    }
  })
})

function (next) {
            var sessionId = request.signedCookies['connect.sid']
                || request.signedCookies[nconf.get('socket.io:sessionKey')]
                || '';
            if (_.isEmpty(sessionId)) {
                winston.error("session id is null");
                return callback('[[error: session id is null]]');
            }
            sessionStore.get(sessionId, function (err, sessionData){
                if (err) {
                    return next(err);
                }
                if (sessionData) {
                    request.session = sessionData;  //set db session to request.session
                    //TODO need distinguish user or admin
                    //winston.info(request.headers);
                    //winston.info(request.cookie);
                } else {