Node.js req.session 变量未定义

Node.js req.session variable undefined

本文关键字：变量 未定义 session req js Node      更新时间：2023-09-26

main.js（仅相关部分）

var express = require('express');
var app = require('express')(),
    expressSession = require('express-session'),
    cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
// Create application/x-www-form-urlencoded parser
var urlencodedParser = bodyParser.urlencoded({ extended: false })
// Access Middleware
var connect = require('connect');
var http = require('http');
var session = require('express-session');
app.use(express.static('public'));
app.use(expressSession({
    secret: 'SECKEY',
    resave: true,
    saveUninitialized: true
}));
app.post('/process_post', urlencodedParser, function (req, res) {
    // Prepare output in JSON format
    var response = {
        first_name:req.body.first_name,
        last_name:req.body.last_name
    };
    console.log(response);

    var post = req.body;
    if(post.first_name === 'u' && post.last_name === 'p') {
        res.session.user_id = 3;
        res.redirect('/home');
    } else {
        res.send('INVALID');
    }
    res.end(JSON.stringify(response));
});

这是我得到的错误：

TypeError: Cannot set property 'user_id' of undefined
   at D:'Users'Winston'Code'NodeJS Projects'Sample'main.js:43:29
   at Layer.handle [as handle_request] (D:'Users'Winston'Code'NodeJS Projects'Sample'node_modules'express'lib'router'layer.js:95:5)
   at next (D:'Users'Winston'Code'NodeJS Projects'Sample'node_modules'express'lib'router'route.js:131:13)
   at D:'Users'Winston'Code'NodeJS Projects'Sample'node_modules'body-parser'lib'read.js:121:5
   at invokeCallback (D:'Users'Winston'Code'NodeJS Projects'Sample'node_modules'body-parser'node_modules'raw-body'index.js:262:16)
   at done (D:'Users'Winston'Code'NodeJS Projects'Sample'node_modules'body-parser'node_modules'raw-body'index.js:251:7)
   at IncomingMessage.onEnd (D:'Users'Winston'Code'NodeJS Projects'Sample'node_modules'body-parser'node_modules'raw-body'index.js:308:7)
   at IncomingMessage.emit (events.js:104:17)
   at _stream_readable.js:908:16
   at process._tickCallback (node.js:355:11)

req.session不起作用，但我想我定义了一切。我已经安装了连接和快速会话中间件。将来如何调试此类问题？

编辑1：打印出要求会话

{ cookie:
   { path: '/',
     _expires: null,
     originalMaxAge: null,
     httpOnly: true } }
{ first_name: 'u', last_name: 'p' }
{ cookie:
   { path: '/',
     _expires: null,
     originalMaxAge: null,
     httpOnly: true } }

你叫res.session不是req.session

你在下面更改你的代码：

res.session.user_id = 3;

自

req.session.user_id = 3;
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