javascript - session 未定义 - 使用 Connect-Redis/ExpressJS/Node

Question

今天早上我醒来发现 Nodejitsu 出现以下错误:

警告:connection.session() MemoryStore 不是为生产环境设计的，因为它会泄漏内存，并且不会扩展到单个进程。

“那么好吧!”我心想 - 然后我去寻找更合适的东西。我选择了 Redis，并立即开始在我的应用程序中实现 connect-redis 和 node-redis。

但是，在反复尝试修复后，以下错误继续浮出水面。错误如下:

TypeError: Cannot set property 'loggedIn' of undefined
        at /Users/Ryan/Aggregus/server.js:300:25
        at Promise.<anonymous> (/Users/Ryan/Aggregus/object_models/user.js:60:5)
        at Promise.<anonymous> (/Users/Ryan/Aggregus/node_modules/mongoose/node_modules/mpromise/lib/promise.js:162:8)
        at Promise.EventEmitter.emit (events.js:95:17)
        at Promise.emit (/Users/Ryan/Aggregus/node_modules/mongoose/node_modules/mpromise/lib/promise.js:79:38)
        at Promise.fulfill (/Users/Ryan/Aggregus/node_modules/mongoose/node_modules/mpromise/lib/promise.js:92:20)
        at /Users/Ryan/Aggregus/node_modules/mongoose/lib/query.js:1813:13
        at model.Document.init (/Users/Ryan/Aggregus/node_modules/mongoose/lib/document.js:243:11)
        at completeOne (/Users/Ryan/Aggregus/node_modules/mongoose/lib/query.js:1811:10)
        at /Users/Ryan/Aggregus/node_modules/mongoose/lib/query.js:1779:11

loggedIn 只是指 req.session.loggedIn，这是我用来跟踪登录用户的 session 变量。以下是有问题的应用程序代码:

var express = require('express');
var crypto = require('crypto');
var mongoose = require('mongoose');
var nodemailer = require('nodemailer');
var request = require('request');
var underscore = require('underscore');
var mandrill = require('node-mandrill')('0bFNPDenlDiZtu7aXujDQQ');
var connect = require('connect');
var engines = require('consolidate');
var fs = require('fs');
var redis = require("redis").createClient();

var RedisStore = require('connect-redis')(express);

var sessionStore = new RedisStore({
    client: redis
});

var stripe_api_key = 'KEY';
var Stripe = require('stripe')(stripe_api_key);

var app = express(); 

app.configure(function() {
    app.engine('html', engines.jade);
    app.set('view engine', 'html');
    app.use(express.cookieParser()); 
    app.use(express.bodyParser());
    app.use(express.session({secret: "svtabyrki4q786as37c785ta8vi56aiw4i8w467acv", store: sessionStore}));
    app.use(express.static(__dirname + '/www'));
    app.use(express.compress()); 
    app.use(app.router);

});

// Mongoose Connection

var db = mongoose.connection;

var dbURI = 'HIDDENURL';

db.on('disconnected', function() {
    mongoose.connect(dbURI, {server:{auto_reconnect:true}});
});

db.on('error', function(error) {
  console.error('Error in MongoDb connection: ' + error);
  mongoose.disconnect();
});

mongoose.connect(dbURI, {server:{auto_reconnect:true}});

// Mongoose Object Models

var User = require('./object_models/user')(mongoose, nodemailer, mandrill);
var Notifications = require('./object_models/notification')(mongoose, nodemailer);
var Experience = require('./object_models/experience')(mongoose, nodemailer);
var Booking = require('./object_models/booking')(mongoose, nodemailer);
var Review = require('./object_models/review')(mongoose, nodemailer);
var Heart = require('./object_models/heart')(mongoose, nodemailer);
var Message = require('./object_models/message')(mongoose, nodemailer);

// Nodemailer Settings

var smtpTransport = nodemailer.createTransport("SMTP",{
    service: "Gmail",
    auth: {
        user: "ryan@aggregus.com",
        pass: pwd
    }
});

// Bootstrap Call

app.get('/', function(req, res) {
    res.render('../index.html');
    console.log("WUSUP");
});

为了进一步说明，这是我迄今为止尝试过但无济于事的方法:

1. 我已将 app.use(express.cookieParser()); 放置在 express.session 调用之前，正如该主题的大多数文章所建议的那样。
2. 我已确保我的 new RedisStore 调用在初始化时直接引用 client。
3. 我在 express.session 和 'express.cookieParser' 的初始化调用之后放置了 app.use(app.router)。
4. 通过 createClient() 调用，我的 Redis 服务器功能齐全。

这similar question已通过阻止相当微不足道的 app.use 初始化来在 Express 的 sessionStore 被初始化之前调用 app.router 来解决。

因此，TL;DR:在使用 connect-redis 时，我的 session 变量返回 undefined。我已经在网上搜索了答案，我唯一的线索是 app.router 是在 Express 自己的 session 处理之前启动的。那个小故障发生的地方超出了我的范围。 Stack Overflow 的众神怜悯我可怜的灵魂。

编辑:认为 package.json 可能方便引用。通过 NodeJitsu 生成:

{
  "name": "Aggregus",
  "subdomain": "aggregus-Aggregus",
  "scripts": {
    "start": "node server.js"
  },
  "version": "0.0.0-14",
  "engines": {
    "node": "0.8.x"
  },
  "dependencies": {
    "connect": "2.7.8",
    "consolidate": "0.9.1",
    "express": "3.2.2",
    "jade": "0.30.0",
    "mongoose": "3.6.9",
    "node-mandrill":"1.0.1",
    "nodemailer": "0.4.1",
    "request":"2.22.0",
    "stripe": "1.3.0",
    "underscore":"1.4.4"
  }
}

Answer 1

你调用 connect-redis 是错误的，你不需要单独安装 redis。但是，我在你的 package.json 中没有看到 connect-redis，所以你应该 npm install --save connect-redis。然后做这样的事情:

var express = require('express');
var RedisStore = require('connect-redis')(express);
var ports = require('./classes/ports.js');
var config = require('./config/config.js');
var routes = require('./routes');
var errors = require('./classes/errors.js');

var app = express();
ports(app);
app
.use(express.logger())
.use(express.compress())
.use(express.cookieParser())
.use(express.session({
  store: new RedisStore({
    port: config.redisPort,
    host: config.redisHost,
    db: config.redisDatabase,
    pass: config.redisPassword
  }),
  secret: 'Your secret here',
  proxy: true,
  cookie: { secure: true }
}))
.use(express.favicon(__dirname + '/../public/img/favicon.ico'))
.use(express.bodyParser())
.use(express.methodOverride())

routes(app);
errors(app);