88 lines
2.6 KiB
Markdown
88 lines
2.6 KiB
Markdown
---
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id: 5895f70df9fc0f352b528e6a
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title: 创建新的中间件
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challengeType: 2
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forumTopicId: 301551
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dashedName: create-new-middleware
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---
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# --description--
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无论是否登录,任何用户都可以通过输入 url 而跳转到 `/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。 这就是一个很棒的创建中间件的示例。
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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,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:
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```js
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function ensureAuthenticated(req, res, next) {
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if (req.isAuthenticated()) {
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return next();
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}
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res.redirect('/');
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};
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```
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然后,在 profile 页面请求中,添加 *ensureAuthenticated* 作为中间件,放在 get 请求(包含渲染页面的函数)的参数之前。
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```js
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app
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.route('/profile')
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.get(ensureAuthenticated, (req,res) => {
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res.render(process.cwd() + '/views/pug/profile');
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});
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```
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完成上述要求后,请提交你的页面链接。 如果你遇到了问题,可以参考[这里](https://gist.github.com/camperbot/ae49b8778cab87e93284a91343da0959)的答案。
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# --hints--
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应把 ensureAuthenticated 中间件添加到 /profile 路由中。
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```js
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(getUserInput) =>
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$.get(getUserInput('url') + '/_api/server.js').then(
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(data) => {
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assert.match(
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data,
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/ensureAuthenticated[^]*req.isAuthenticated/gi,
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'Your ensureAuthenticated middleware should be defined and utilize the req.isAuthenticated function'
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);
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assert.match(
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data,
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/profile[^]*get[^]*ensureAuthenticated/gi,
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'Your ensureAuthenticated middleware should be attached to the /profile route'
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);
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},
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(xhr) => {
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throw new Error(xhr.statusText);
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}
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);
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```
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如果没有通过验证,对 /profile 的 GET 请求应重定向到 /。
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```js
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(getUserInput) =>
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$.get(getUserInput('url') + '/profile').then(
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(data) => {
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assert.match(
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data,
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/Home page/gi,
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'An attempt to go to the profile at this point should redirect to the homepage since we are not logged in'
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);
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},
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(xhr) => {
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throw new Error(xhr.statusText);
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}
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);
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```
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# --solutions--
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```js
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/**
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Backend challenges don't need solutions,
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because they would need to be tested against a full working project.
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Please check our contributing guidelines to learn more.
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*/
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```
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