通过反应获取 cookie [英] Get cookie with react

问题描述

我需要知道我的用户是否已连接.为此，我想使用 express-session 读取我在服务器端设置的 cookie:

app.use(session({秘密:'加密密钥'，重新保存:假，保存未初始化:真，cookie: { secure: false }//如果 https 则设为 true}))

app.post('/connect_user', (req, res) => {req.session.cookie.username = req.body.usernamefindUserData('username', req.body.username, req, (userData) => {req.session.cookie.id = userData.idreq.session.cookie.username = userData.usernameres.redirect('/profil')})})

我尝试使用 react-cookie 但它不起作用，即使我复制粘贴了 npm react-cookie 文档示例:

从'react'导入React；从'./Landing'导入登陆；从'./Home'导入首页；从./Profil"导入配置文件；import { BrowserRouter as Router, Route } from 'react-router-dom';从道具类型"导入 { instanceOf };从'react-cookie'导入{cookies}；类 App 扩展了 React.Component {静态 propTypes = {饼干: instanceOf(Cookies).isRequired};构造函数(道具){超级(道具)；const { cookies } = props;this.state = {用户名:cookies.get('用户名')};}使成为() {console.log(this.state.name)让 homePage = (!this.state.username) ?<着陆/>:<主页/>返回 (<路由器><div><路由精确路径='/' component={homePage}></Route><Route path='/profil' component={Profil}></Route>

</路由器>)}}导出默认应用程序；

这很奇怪，因为 document.cookie 呈现了正确的结果，但我不知道如何处理它:

PHPSESSID=0nv9ic8h7pv2b63lu4v7eg3mop;user_id=21;用户名=乌戈；SL_G_WPT_TO=fr;SL_GWPT_Show_Hide_tmp=未定义；SL_wptGlobTipTmp=未定义

解决方案

你可以使用 js-cookie 包，并且可以使用 npm install js-cookie --save 安装它> 命令.

从'react'导入React；从 'js-cookie' 导入 Cookie；类 App 扩展了 React.Component {this.state = {用户名:Cookies.get('用户名')}//更多代码....}

文档:https://github.com/js-cookie/js-cookie

NPM:https://www.npmjs.com/package/js-cookie

I need to know if my user is connected or not. For that I want to read the cookies that I set in the server side with express-session :

app.use(session({
    secret: 'crypted key',
    resave: false,
    saveUninitialized: true,
    cookie: { secure: false } // Put true if https
}))

app.post('/connect_user', (req, res) => {
    req.session.cookie.username = req.body.username
    findUserData('username', req.body.username, req, (userData) => {
        req.session.cookie.id = userData.id
        req.session.cookie.username = userData.username
        res.redirect('/profil')
    })
})

I tried to use react-cookie but it doesn't work even though I copy-pasted the npm react-cookie docs example:

import React from 'react';
import Landing from './Landing';
import Home from './Home';
import Profil from './Profil';
import { BrowserRouter as Router, Route } from 'react-router-dom';
import { instanceOf } from 'prop-types';
import { Cookies } from 'react-cookie';

class App extends React.Component {
    static propTypes = {
        cookies: instanceOf(Cookies).isRequired
      };
     
      constructor(props) {
        super(props);
     
        const { cookies } = props;
        this.state = {
          username: cookies.get('username')
        };
      }
    render() {
        console.log(this.state.name) 
        let homePage = (!this.state.username) ? <Landing/> : <Home/>
        return (
            <Router>
                <div>
                    <Route exact path='/' component={homePage}></Route>
                    <Route path='/profil' component={Profil}></Route>
                </div>
            </Router>
        )
    }
}

export default App;

It's weird because document.cookie renders the correct result, but I don't know how handle it:

PHPSESSID=0nv9ic8h7pv2b63lu4v7eg3mop; user_id=21; username=Ugo; SL_G_WPT_TO=fr; SL_GWPT_Show_Hide_tmp=undefined; SL_wptGlobTipTmp=undefined

解决方案

You can use js-cookie package and can install it using npm install js-cookie --save command.

import React from 'react';
import Cookies from 'js-cookie';

class App extends React.Component {
     this.state = {
        username: Cookies.get('username')
     }

//  more code....
}  

Documentation : https://github.com/js-cookie/js-cookie

NPM : https://www.npmjs.com/package/js-cookie

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