文件上传的简单使用

//文件上传测试
const express = require('express');
const router = express.Router();

const fs = require('fs');
const multer = require('multer');
let path = require("path");

function uploadConfig(folder, mb, suffix) {
    // folder:上传文件的具体分类(具体文件夹名字)
    // mb:上传文件的大小限制(KB)
    // suffix:上传文件的类型控制(数组)
    path_new = path.resolve(__dirname, '../public/uploads/' + folder);
    return multer({
        storage: multer.diskStorage({
            //文件存储位置  
            destination: (req, file, cb) => {
                fs.mkdir(path_new, { recursive: true }, (err) => {
                    if (err) throw err;
                });
                cb(null, path_new);
            },
            //文件名  
            filename: (req, file, cb) => {
                cb(null, `${Date.now()}_${Math.ceil(Math.random() * 1000)}_multer.${file.originalname.split('.').pop()}`);
            }
        }),
        limits: {
            //上传文件的大小限制,单位bytes  
            fileSize: 1024 * 1024 * mb
        },
        fileFilter: (req, file, cb) => {
            //文件类型
            if (suffix.indexOf(file.mimetype) !== -1) {
                cb(null, true);
            } else {
                cb(null, false);
            }
        }
    }).any();
}

router.post('/upload/img', uploadConfig('images/', 10, ['image/jpeg', 'image/jpg']), async function (req, res, next) {
    let uploadFile = req.files;
    if (uploadFile.length == 0) {
        res.json({ code: 233, info: '文件上传错误' });
    } else {
        res.json({ code: 200, info: `文件上传成功数量:${uploadFile.length}`, mes: uploadFile });
    }
});

module.exports = router;