fix: replace .chinese.md extension with .md

curriculum/challenges/chinese/06-quality-assurance/advanced-node-and-express/logging-a-user-out.md

@@ -0,0 +1,73 @@
+---
+id: 58965611f9fc0f352b528e6c
+title: Logging a User Out
+challengeType: 2
+forumTopicId: 301560
+localeTitle: 用户退出登录
+---
+
+## Description
+<section id='description'>
+
+创建退出登录的逻辑是比较简单的。只要用户尝试退出登录，路由就应重定向到主页，而不应该显示任何其他页面。
+
+在 passport 里，只需要在重定向前调用 <code>req.logout();</code> 即可完成用户的退出登录。
+
+```js
+app.route('/logout')
+  .get((req, res) => {
+    req.logout();
+    res.redirect('/');
+});
+```
+
+你可能注意到我们还没有处理 404 错误，这个错误码代表页面无法找到。在 Node.js 中我们通常会用如下的中间件来处理，请在所有路由之后添加这段代码：
+
+```js
+app.use((req, res, next) => {
+  res.status(404)
+    .type('text')
+    .send('Not Found');
+});
+```
+
+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 <a href='https://gist.github.com/camperbot/c3eeb8a3ebf855e021fd0c044095a23b' target='_blank'>这里</a> 的答案。
+
+</section>
+
+## Instructions
+<section id='instructions'>
+
+</section>
+
+## Tests
+<section id='tests'>
+
+```yml
+tests:
+  - text: <code>req.Logout</code> 应在 <code>/logout</code> 中调用。
+    testString: getUserInput => $.get(getUserInput('url')+ '/_api/server.js') .then(data => { assert.match(data, /req.logout/gi, 'You should be calling req.logout() in your /logout route'); }, xhr => { throw new Error(xhr.statusText); })
+  - text: 退出登录后应重定向到主页 /
+    testString: getUserInput => $.get(getUserInput('url')+ '/logout') .then(data => { assert.match(data, /Home page/gi, 'When a user logs out they should be redirected to the homepage'); }, xhr => { throw new Error(xhr.statusText); })
+
+```
+
+</section>
+
+## Challenge Seed
+<section id='challengeSeed'>
+
+</section>
+
+## Solution
+<section id='solution'>
+
+```js
+/**
+  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.
+*/
+```
+
+</section>