freeCodeCamp/curriculum/challenges/chinese/06-quality-assurance/advanced-node-and-express/create-new-middleware.md

2.7 KiB

id challengeType forumTopicId title
5895f70df9fc0f352b528e6a 2 301551 创建新的中间件

Description

无论是否登录,或者哪怕用户试图访问其他页面,目前都会跳转到 /profile。为了解决这个问题,我们需要在 profile 页面渲染之前进行用户验证,创建中间件就可以实现这个功能。

这个挑战的目标是创建ensureAuthenticated(req, res, next)中间件方法,通过在 request 上调用 passports 的isAuthenticated 方法,我们可以检查 req.user 是否定义,从而确定用户是否通过认证。如果用户已通过验证,就会调用 next(),否则我们应重定向到主页并让用户登录。该中间件的实现如下:

function ensureAuthenticated(req, res, next) {
  if (req.isAuthenticated()) {
    return next();
  }
  res.redirect('/');
};

然后,我们需要把 ensureAuthenticated 中间件添加到处理请求的回调之前:

app
 .route('/profile')
 .get(ensureAuthenticated, (req,res) => {
    res.render(process.cwd() + '/views/pug/profile');
 });

完成上述要求后,你可以在下方提交你的页面链接。如果你遇到了问题,可以参考 这里 的答案。

Instructions

Tests

tests:
  - text: <code>ensureAuthenticated</code> 中间件应添加到 <code>/profile</code>路由中。
    testString: getUserInput => $.get(getUserInput('url')+ '/_api/server.js') .then(data => { assert.match(data, /ensureAuthenticated[^]*req.isAuthenticated/gi, 'Your ensureAuthenticated middleware should be defined and utilize the req.isAuthenticated function'); assert.match(data, /profile[^]*get[^]*ensureAuthenticated/gi, 'Your ensureAuthenticated middleware should be attached to the /profile route'); }, xhr => { throw new Error(xhr.statusText); })
  - text: 如果没有通过验证,对 /profile 的 GET 请求应重定向到 /
    testString: getUserInput => $.get(getUserInput('url')+ '/profile') .then(data => { assert.match(data, /Home page/gi, 'An attempt to go to the profile at this point should redirect to the homepage since we are not logged in'); }, xhr => { throw new Error(xhr.statusText); })

Challenge Seed

Solution

/**
  Backend challenges don't need solutions, 
  because they would need to be tested against a full working project. 
  Please check our contributing guidelines to learn more.
*/