快速会话中间件

Question

我正在学习有关服务器端开发的 Coursera 课程，并且我严格按照说明进行操作。但是，我不断收到此错误。他们的讨论平台上没有相关帖子，我似乎无法调试，因为（如果您在下面看到）跟踪仅指 node_modules 文件夹中的文件，这些文件是在项目作为节点项目初始化时建立的.因此，我被困住了。大概我的代码有“某些”错误，但由于跟踪不是指我编码的任何东西，我迷路了。我也想过可能是我安装express失败了，但是我已经尝试按照课程中的说明重新安装，似乎并没有解决问题。

有没有人在创建 Node.js 项目时遇到过这个特定错误？如果遇到过，您是如何解决的？

登录会话需要会话支持。你忘记使用 express-session 中间件了吗？

这是 app.js 代码：

```var createError = require('http-errors');
const express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
const session = require('express-session');
var FileStore = require('session-file-store')(session);
var passport = require('passport');
var authenticate = require('./authenticate');
var config = require('./config');

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
var dishRouter = require('./routes/dishRouter');
var leaderRouter = require('./routes/leaderRouter');
var promoRouter = require('./routes/promoRouter');
const uploadRouter = require('./routes/uploadRouter');

const mongoose = require('mongoose');
mongoose.Promise = require('bluebird');

const Dishes = require('./models/dishes');

const url = config.mongoUrl;
const connect = mongoose.connect(url);

connect.then((db) => {

  console.log('Connected correctly to the server.');

}, (err) => {console.log(err); });

var app = express();

// Secure traffic only
app.all('*', (req, res, next) => {
  if (req.secure) {
    return next();
  }
  else {
    res.redirect(307, 'https://' + req.hostname + ':' + app.get('secPort') + req.url);
  }
});

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));

app.use(passport.initialize());
app.use(passport.session());  // FOund this in the Forum not Given Code

// Note that these two mountings occur before authentication
app.use('/', indexRouter);
app.use('/users', usersRouter);

// Authentication is now completed
app.use(express.static(path.join(__dirname, 'public')));

// This is where the mounting occurs
app.use('/dishes', dishRouter);
app.use('/promotions', promoRouter);
app.use('/leaders', leaderRouter);
app.use('/imageUpload',uploadRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = 应用； ```

这是 index.js 文件：

```var express = require('express');
var router = express.Router();

/* GET home page. */
router.get('/', function(req, res, next) {
  res.render('index', { title: 'Express' });
});```

module.exports = 路由器； ```

Answer 1

根据 session-file-store 的 doc，正确的初始化是这样的：

const session = require('express-session');
const FileStore = require('session-file-store')(session);
 
const fileStoreOptions = {};
 
app.use(session({
    store: new FileStore(fileStoreOptions),
    secret: 'keyboard cat'
}));

您似乎缺少实际初始化 express-session 的 app.use() 部分。

快速会话中间件

Express Session Middleware

node.js

express

middleware