routes/index.js
node express 部署到服务器，用pm2进行管理。启动的时候需要进去 /bin 目录服务器 上传文件路径 ： “.. /public/uploads”本地上传文件路径 ： “./public/uploads”下载文件不能通过ajax请求和axios,需要通过a标签或者 window.location.herf = '下载文件接口' 下载文件的接口需要写成get请求方式 /* * @Author: 471826078@qq.com * @Date: 2020-05-21 09:48:04 * @LastEditors: 471826078@qq.com * @LastEditTime: 2020-06-12 14:42:17 */ var express = require('express'); var router = express.Router(); const multer = require('multer') const path = require('path') const http = require('http') const fs = require('fs') let upload = multer({ storage: multer.diskStorage({ destination: function (req, file, cb) { // cb(null, './public/uploads'); //本地 cb(null, '../public/uploads'); //服务器 }, filename: function (req, file, cb) { var changedName = new Date().toISOString().replace(/:/g, '-') +'-'+ file.originalname; cb(null, changedName); } }) }) /* GET home page. */ router.get('/', function (req, res, next) { res.render('index', { title: 'Express' }); }); //单个图片文件上传 router.post('/uploadImage', upload.single('file'), (req, res) => { if (!req.file) { //判断一下文件是否存在，也可以在前端代码中进行判断。 res.json({ code: 0, message: "上传文件不能为空！", data: null }) return false } //返回路径需要转义 否则会返回反斜杠格式数据 导致微信小程序识别不了本地图片 http://localhost:8888//uploads\images\1582511344098-1.jpg let filePath = req.file.path; let pathResult = filePath.split('\\').join('/'); res.json({ code: 1, type: 'uploadImage', message: "上传成功！", data: req.file.path, originalname: req.file.originalname, path:'线上服务地址' + pathResult }) }); //下载文件 router.get('/download',(req, res, next)=>{ const name = req.body.name; console.log(name) var path = '../public/download/'+ name; var size = fs.statSync(path).size; var f = fs.createReadStream(path); res.writeHead(200, { 'Content-Type': 'application/force-download', 'Content-Disposition': 'attachment; filename=' + name, 'Content-Length': size }); f.pipe(res); }) module.exports = router;