javascript - Express app.get 中间件不工作 `SyntaxError: Unexpected end of input`

Question

我正在关注 Youtube 上的 Express 教程。不幸的是，我遇到了中间件的问题，并且非常困惑。

在我的主文件中，我有代码:

const express = require('express');
const path = require('path');
const app = express();
const logger = require('./middleware/logger');

app.use('/api/members', require('./routes/api/members'));

const PORT = process.env.PORT || 5000;

app.listen(PORT, () => console.log(`Server started on port ${PORT}`));

members.js 文件是:

const express = require('express');
const router = express.Router();
const members = require('../../Members')

//Gets All Members
router.get('/', (req, res) => res.json(members));

//Get Single Memberss
router.get('/:id', (req, res) => {
  const found = members.some(member => member.id === parseInt(req.params.id));

  if(found){
    res.json(members.filter(member => member.id === parseInt(req.params.id)));
  } else {
    res.status(400).json({msg: `No member with the id of ${req.params.id}`});
  }

module.exports = router;

此代码导致 nodemon 崩溃并给出以下错误:

SyntaxError: Unexpected end of input
    at wrapSafe (internal/modules/cjs/loader.js:1072:16)
    at Module._compile (internal/modules/cjs/loader.js:1122:27)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1178
:10)
    at Module.load (internal/modules/cjs/loader.js:1002:32)
    at Function.Module._load (internal/modules/cjs/loader.js:901:14)
    at Module.require (internal/modules/cjs/loader.js:1044:19)
    at require (internal/modules/cjs/helpers.js:77:18)
    at Object.<anonymous> (/home/gavin/Documents/ExpressCrashCourse/index
.js:12:25)
    at Module._compile (internal/modules/cjs/loader.js:1158:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1178
:10)

我的解释是它在 app.use('/api/members', require('./routes/api/members')); 处中断，但我不太明白为什么。另外，在上面的 app.use 函数中，我不太明白第二个参数在做什么。我认为这将是 Express 中 Router 对象的一个​​实例，但我不明白它如何替代通常的 function(req,res){}那将是它的位置。不管怎样，我已经看过好几次了，看起来我从教程中复制了完全按照其编写的代码，所以我真的很困惑为什么这不起作用。非常感谢任何帮助。

Answer 1

看起来您缺少右花括号 } 和括号 )

const express = require('express');
const router = express.Router();
const members = require('../../Members')

//Gets All Members
router.get('/', (req, res) => res.json(members));

//Get Single Memberss
router.get('/:id', (req, res) => {
    const found = members.some(member => member.id === parseInt(req.params.id));

    if (found) {
        res.json(members.filter(member => member.id === parseInt(req.params.id)));
    } else {
        res.status(400).json({msg: `No member with the id of ${req.params.id}`});
    }
}); // <- Close your callback
module.exports = router;