无法获取 cookie nodejs

Question

我设置了一个cookie，

router.get("/addCartToCookie", function(req, res) {
  let options = {
    maxAge: 1000 * 60 * 15,
    httpOnly: true, 
  };

  let cartData = {
    name: "test cookie",
    slug: slugify("test cookie"),
    productPictures: "K6B4dzGjN-teal.jpeg",
    price: 200,
    description: "testing cookies",
    quantity: 7,
  };

  // Set cookie
  res.cookie("cartName", cartData, options); 
  res.send("Cart Added to Cookie");
});

这完美地设置了一个名为“cartName”的cookie。 但是，一旦我尝试获取 cookie，它就会显示“cartName”未定义。

获取 Cookie 代码：

router.get("/getCartFromCookie", function (req, res) {
  res.send(req.cookies["cartName"]);
  console.log(req.cookies);
});

我尝试控制台记录 cookies 但它也显示未定义。

Answer 1

据我所知，处理 cookies 的优化方法是使用cookie-parser依赖来表达。

$ npm install cookie-parser

然后，您可以使用req.cookies或req.signedCookies属性轻松获取 cookies，如下所示：

var express = require('express')
var cookieParser = require('cookie-parser')

var app = express()
app.use(cookieParser())

app.get('/', function (req, res) {
  // Cookies that have not been signed
  console.log('Cookies: ', req.cookies)

  // Cookies that have been signed
  console.log('Signed Cookies: ', req.signedCookies)

  // Your cart cookie
  console.log('Cookies: ', req.cookies.cartName)
})

app.listen(8080);

参考：

1. https://github.com/expressjs/cookie-parser
2. http://expressjs.com/en/resources/middleware/cookie-parser.html

Answer 2

您没有显示所有代码，但我假设您正在使用cookie-parser 中间件直接在请求 object 上访问 cookies。 如果没有，请从那里添加 cookie-parser 和 go 开始。

对于您的 cookie 读取问题，请注意您无法在同一请求上发送和读取 cookies。 您需要一个请求来设置 cookie，而另一个请求来读取 cookie。

import express from 'express';
import cookieParser from 'cookie-parser'
import {inspect} from 'util';

const app = express();
const router = express.Router()
router.use(cookieParser())
app.use(router);

const port = 3000

router.get('/setcookie', (req, res) =>{
  res.cookie('testCookie', 'magic content');
  res.send("set the cookie");
})

router.get('/readCookie', (req, res) =>{
  res.send('your cookies: ' + inspect(req.cookies['testCookie']));
  console.log(req.cookies);
})

app.listen(port, () => {
  console.log(`Example app listening at http://localhost:${port}`)
})