<!--add.ejs-->
<form action="/admin/nav/doAdd" method="post" enctype="multipart/form-data">
标题：<input type="text" name="title" id="title"><br><br>
图片：<input type="file" name="pic" id="pic"><br><br>
描述：<textarea name="desc" id="desc" cols="30" rows="10"></textarea><br><br>
<input type="submit" value="提交">
</form>，我来为大家科普一下关于express中间件的作用?以下内容希望对你有帮助!
express中间件的作用
单文件上传
<!--add.ejs-->
<form action="/admin/nav/doAdd" method="post" enctype="multipart/form-data">
标题：<input type="text" name="title" id="title"><br><br>
图片：<input type="file" name="pic" id="pic"><br><br>
描述：<textarea name="desc" id="desc" cols="30" rows="10"></textarea><br><br>
<input type="submit" value="提交">
</form>
// nav.js文件中
const express = require('express')
const tools = require('../../model/tools')
Router.post('/doAdd', tools.multer().single('pic'), (req, res) => {
// 获取表单传过来的数据
res.send({
body: req.body,
file: req.file
})
})
// tools.js工具
const multer = require('multer')
const path = require('path')
const sd = require('silly-datetime')
const mkdirp = require('mkdirp')
let tools = {
/* 封装图片上传 */
multer() {
var storage = multer.diskStorage({
// 配置上传的目录
destination: async (req, file, cb) => {
// 1. 获取当前日期 20200703
let day = sd.format(new Date(), 'YYYYMMDD')
// static/upload/20200703
let dir = path.join('static/upload', day)
// 2. 按照日期生成图片存储目录
await mkdirp(dir) // mkdirp是一个异步方法
cb(null, dir)
},
// 修改上传后的文件名
filename: function (req, file, cb) {
// 获取上传文件的后缀名
let extname = path.extname(file.originalname)
cb(null, Date.now() extname)
}
})
var upload = multer({ storage: storage })
return upload
},
md5() { }
}
module.exports = tools
// user.js多文件上传
const express = require('express')
const tools = require('../../model/tools')
var router = express.router()
router.get('/', (req, res) => {
res.send('用户列表')
})
router.get('/add', (req, res) => {
res.render('admin/user/add')
})
// 多文件上传
let cpUpload = tools.multer().fields([{ name: 'pic1', maxCount: 1 }, { name: 'pic2', maxCount: 1 }])
router.post('/doAdd', cpUpload, (req, res) => {
res.send({
body: req.body,
files: req.files
})
})
module.exports = router
