如果从新设备MEANJS登录，则删除以前的会话

Question

如果用户从新设备登录，我想从MongoStore / sessionStore中删除以前的会话。 MEANJS正在使用

表达会话connect-mongo

将会话存储在mongodb中。 我确实进行了搜索，但是找不到从db获取会话列表的解决方案。 请在这里帮我

MongoStore = require('connect-mongo')(session),
favicon = require('serve-favicon'),

    module.exports.initSession = function (app, db) {
  // Express MongoDB session storage
  app.use(session({
    saveUninitialized: true,
    resave: true,
    secret: config.sessionSecret,
    cookie: {
      maxAge: config.sessionCookie.maxAge,
      httpOnly: config.sessionCookie.httpOnly,
      secure: config.sessionCookie.secure && config.secure.ssl
    },
    key: config.sessionKey,
    store: new MongoStore({
      mongooseConnection: db.connection,
      collection: config.sessionCollection
    })
  }));
};

Answer 1

这应该有效，至少对您来说是一个很好的起点

var async = require('async'); //npm install async --save
exports.removeSessionsForUser = function(req, res, next) {
    var userId = req.user ? req.user.id : undefined;
    if (!userId)
        return next(new Error('No user found in req. Exiting'));

    var store = req.sessionStore;
    var sessionsColl = store.db.collection('sessions');

    sessionsColl.find({
        'session.user': userId,
        // we are tryin to remove all sessions, you can leave current
        // '_id': { '$ne': req.sessionID }
    }, { _id : 1 }, function (err, userSessions) {
        async.each(userSessions, function (userSession, cb) {
            store.destroy(userSession._id, cb);
        }, function(notDone) {
            if(notDone)
                return next(new Error(notDone));

            res.send('ok');
        });
    });
}

这使用async.each ，这是

async.each(Array, function(item, callback) {/* iterate */}, function(error) {/* end */});

Answer 2

最后，在我的帮助下，我可以解决问题了。这是我的代码

    exports.logoutFromPreviousDevices = function (req, res) {
  var userId = req.query.userid;
  if (!userId)
    return res.status(400).send({
      message: errorHandler.getErrorMessage('No user found in input request')
    });

  var store = req.sessionStore;
  var sessionsColl = store.db.collection('sessions');

  sessionsColl.find({
    // 'session.passport.user': userId,
    // we are tryin to remove all sessions, you can leave current
    // '_id': { '$ne': req.sessionID }
  }, function (err, userSessions) {
    if (userSessions !== null) {
      userSessions.toArray(function (a, sessionsData) {
        sessionsData.forEach(function (element, index) {
          var data = JSON.parse(element.session);
          if (element._id !== req.sessionID && req.query.userid === data.passport.user) {
            store.destroy(element._id, function (destroyerr, dat) {
              if (destroyerr)
                return res.status(400).send({
                  message: errorHandler.getErrorMessage(destroyerr)
                });
              res.jsonp({ status: 'Previous session deleted' });
            });
          }
        });
      });
    } else {
      res.jsonp({ status: 'No session found' });
    }
  });
};