javascript – Router.use()需要一个中间件函数但是未定义

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我在index.js中有这个代码

...
import userRoutes from './src/routes/userRoutes';
import invoicesRoutes from './src/routes/invoicesRoutes';
import authMiddleware from "./src/middlewares/authMiddleware";
...
const app = express();
...
app.use('/user',authMiddleware,userRoutes(app));
app.use('/invoices',invoicesRoutes(app));

我的authmiddleware

const authMiddleware = (req,res,next) => {
    if (req.headers && req.headers.authorization && req.headers.authorization.split(' ')[0] === 'JWT') {
        console.log(req.headers.authorization.split(' ')[0]);
        next();
    } else {
        console.log('else');
        next();
    }
};

export default authMiddleware;

和我的一条路线:

import { register,login } from '../controllers/authController';

const userRoutes = (app) => {
    app.route('/user/signup')
        .post(register);
    app.route('/user/login')
        .post(login);
};

export default userRoutes;

我收到一个错误

throw new TypeError(‘Router.use() requires a middleware function but
got a ‘ + gettype(fn))
^

TypeError: Router.use() requires a middleware function but got a
undefined

怎么了?

最佳答案
您将路由初始化作为中间件功能传递
app.use(‘/ user’,userRoutes(app));

在这行代码中,userRoutes(app)应该返回的是函数(req,res [,next]){}

它应该是这样的

app.use('/user',(req,next) => {
        userRoutes(app);
        next()
})

而你所做的就是

app.use('/user',(app) => {
    app.route('/user/signup').post(register);
    app.route('/user/login').post(login);
})

那是错的

这里似乎有一些不好的逻辑,因为根据我的理解,你将不得不调用http:// localhost / user来初始化路由,并且由于express的中间件包含而无法正常工作.

根据我的理解,你要做的事情应该更像是这样

...
import userRoutes from './src/routes/userRoutes';
import invoicesRoutes from './src/routes/invoicesRoutes';
...
const app = express();
userRoutes(app);
invoicesRoutes(app);

import { register,login } from '../controllers/authController';
import authMiddleware from "./middleware";
const userRoutes = (app) => {
    app.post('/user/signup',register);
    app.post('/user/login',login);
};

export default userRoutes;
原文链接:https://www.f2er.com/js/429233.html

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