我正在开发 Twitter 克隆，并在为经过身份验证的用户获取推文时遇到问题。尽管有有效的令牌和其他路由正常工作，但 /tweets/user 路由未到达，并且我收到 500 错误。终端中没有显示该路线的日志。
Profile.jsx：
const fetchUserTweets = async () => {
console.log(token) //token is printed in browser logs
try {
const response = await axios.get(`${API_URL}/tweets/user`, {
headers: { Authorization: `Bearer ${token}` },
});
setUserTweets(response.data);
} catch (err) {
console.error('Failed to fetch user tweets', err);
}
};
tweet_route.js：
// Get tweets for the authenticated user
router.get('/user', protect, async (req, res) => {
console.log("Reached /tweets/user route");
try {
console.log("reached authenticated user tweets");
const tweets = await Tweet.find({ tweetedBy: req.user._id })
.populate('tweetedBy', 'username name profilePic')
.sort({ date: -1 });
res.json(tweets);
} catch (error) {
console.error('Error fetching tweets for authenticated user:', req.user._id, error);
res.status(500).json({ message: 'Server error' });
}
});
.envProfile.jsx 中的 Axios 请求 URL：
const API_URL = import.meta.env.VITE_API_URL || 'http://localhost:5000';
我知道，
我遇到的错误：
Profile.jsx:44
GET http://localhost:5000/tweets/user 500 (Internal Server Error)
Failed to fetch user tweets AxiosError {message: 'Request failed with status code 500', name: 'AxiosError', code: 'ERR_BAD_RESPONSE', config: {…}, request: XMLHttpRequest, …}
什么可能导致无法到达 /tweets/user 路由，从而导致 500 错误？
谢谢！
/tweets/用户路线未到达...：...该路线没有日志 出现在终端中......
Ans: 请求找到了路由 - router.get('/user', protected, async (req, res) 。然后中间件 protect 也被调用了。 然而，中间件会抛出一个错误，并且该错误由 Express 默认错误处理程序处理，然后将错误写入客户端，然后结束请求。因此，相同的请求不会进入路由处理程序，因此它也不会打印任何控制台日志。
…我收到了 500 错误….
Ans: 当错误代码超出 4xx 或 5xx 范围时，响应状态代码将被设置为 500。这是 Express 中默认的错误处理方式。
调试此案例：
请使用 Express 抛出的堆栈跟踪。这个可以做 显示在浏览器控制台中，如下所示的最小示例。
服务器.js
const express = require('express');
const app = express();
app.use(express.static('./'));
app.get('/a', async (req, res, next) => {
next(new Error('Some error'));
});
app.listen(3000, () => console.log('L@3000'));
index.html 保存在项目文件夹中
<!DOCTYPE html>
<html>
<head>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/axios.min.js"></script>
Displaying stack-trace in the Browser console via axios
</head>
<bod> </bod>
<script>
axios
.get('http://localhost:3000/a')
.catch((error) => console.log(error.response.data));
</script>
</html>
运行示例：
Run the server : node server.js
Run the browser : http://localhost:3000
// the browser console will show an HTML source code as below:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>Error</title>
</head>
<body>
<pre>Error: Some error<br> at /Users/jf/Documents/JF/so/78714491/server.js:7:8<br> at Layer.handle [as handle_request] (/Users/jf/node_modules/express/lib/router/layer.js:95:5)<br> at next (/Users/jf/node_modules/express/lib/router/route.js:144:13)<br> at Route.dispatch (/Users/jf/node_modules/express/lib/router/route.js:114:3)<br> at Layer.handle [as handle_request] (/Users/jf/node_modules/express/lib/router/layer.js:95:5)<br> at /Users/jf/node_modules/express/lib/router/index.js:284:15<br> at Function.process_params (/Users/jf/node_modules/express/lib/router/index.js:346:12)<br> at next (/Users/jf/node_modules/express/lib/router/index.js:280:10)<br> at SendStream.error (/Users/jf/node_modules/serve-static/index.js:121:7)<br> at SendStream.emit (node:events:519:28)</pre>
</body>
</html>
复制并粘贴到浏览器中：
请将 HTML 源代码复制并粘贴到文件 error.html 中，然后在浏览器中查看该文件。它将显示如下。请 请注意第一行，它表示错误已从第 7 行引发。
Error: Some error
at /Users/jf/Documents/JF/so/78714491/server.js:7:8
at Layer.handle [as handle_request] (/Users/jf/node_modules/express/lib/router/layer.js:95:5)
at next (/Users/jf/node_modules/express/lib/router/route.js:144:13)
at Route.dispatch (/Users/jf/node_modules/express/lib/router/route.js:114:3)
at Layer.handle [as handle_request] (/Users/jf/node_modules/express/lib/router/layer.js:95:5)
at /Users/jf/node_modules/express/lib/router/index.js:284:15
at Function.process_params (/Users/jf/node_modules/express/lib/router/index.js:346:12)
at next (/Users/jf/node_modules/express/lib/router/index.js:280:10)
at SendStream.error (/Users/jf/node_modules/serve-static/index.js:121:7)
at SendStream.emit (node:events:519:28)