var session = require('express-session');
var RedisStrore = require('connect-redis')(session);
var config={
"cookie" : {
  "maxAge" : 1800000
},
 "sessionStore" : {
  "host" : "192.168.0.13",
  "port" : "6379",
  "pass" : "123456",
  "db" : 1,
  "ttl" : 1800,
  "logErrors" : true
}

app.use(session({
  name : "sid",
  secret : 'Asecret123-',
  resave : true,
  rolling:true,
  saveUninitialized : false,
  cookie : config.cookie,
  store : new RedisStrore(config.sessionStore)
}));

if (!req.sessionID) {

  debug('no SID sent, generating session');

  generate();

  next();

  return;

 } 

store.generate = function(req){

  req.sessionID = generateId(req);

  req.session = new Session(req);

  req.session.cookie = new Cookie(cookieOptions);

 

  if (cookieOptions.secure === 'auto') {

   req.session.cookie.secure = issecure(req, trustProxy);

  }

 }; 

RedisStore.prototype.set = function (sid, sess, fn) {

  var store = this;

  var args = [store.prefix + sid];

  if (!fn) fn = noop;

 

  try {

   var jsess = store.serializer.stringify(sess);

  }

  catch (er) {

   return fn(er);

  }

 

  args.push(jsess);

 

  if (!store.disableTTL) {

   var ttl = getTTL(store, sess);

   args.push('EX', ttl);

   debug('SET "%s" %s ttl:%s', sid, jsess, ttl);

  } else {

   debug('SET "%s" %s', sid, jsess);

  }

 

  store.client.set(args, function (er) {

   if (er) return fn(er);

   debug('SET complete');

   fn.apply(null, arguments);

  });

 };