表示中间件被叫两次

在app.js我做的

const { authMiddleware } = require('./utils/authMiddleware') var app = express(); app.use('/api', authMiddleware, require('./routes/upload-image')) app.use('/api', require('./routes/user')) app.use('/api', authMiddleware, require('./routes/task')) app.use('/api', authMiddleware, require('./routes/credit')) 

我有一个简单的console.log authMiddleware.js

 module.exports.authMiddleware = function(req, res, next) { //res.body.user_id = ) console.log('get logged in user then set user id to body') next() } 

post image端点就像这个routes / upload-image.js

 const express = require('express'); const router = express.Router(); router.post('/upload-image', function(req, res) { res.json('ok') }); router.get('/upload-image', function(req, res) { ... }) module.exports = router; 

当我调用localhost：3000 / api / upload-image时，我在authMeiddleware中得到了两次控制台，为什么会触发两次？