study_express/12-upload/app.js

/*
 * @Author: Johnhong9527
 * @Date:   2019-06-05 11:10:09
 * @Last Modified by:   Johnhong9527
 * @Last Modified time: 2019-06-10 16:47:55
 * https://juejin.im/post/5a1a80a5f265da43333e1b88
 */
var express = require('express');
var formidable = require('formidable');
var fs = require('fs');
var crypto = require('crypto');

// 引入json解析中间件
var bodyParser = require('body-parser');
var app = express();

// 添加json解析
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
// 允许所有的请求形式
/*app.all('*', function(req, res, next) {
  res.header('Access-Control-Allow-Origin', '*');
  res.header('Access-Control-Allow-Credentials', true);
  res.header('Access-Control-Allow-Headers', 'Content-Type,Accept,X-Requested-With,traceid,rpcid');
  res.header('Access-Control-Allow-Methods', 'PUT,POST,GET,DELETE,OPTIONS');
  res.header('Content-Type', 'application/json;charset=utf-8');
  next();
});*/
app.use('/public', express.static('public'));
// 路由
app.get('/', function(req, res) {
  res.send('Hello World!');
});
app.post('/upload', function(req, res) {
  var form = new formidable.IncomingForm();
  setTimeout(() => {
    // md5
    form.parse(req, function(error, fields, files) {
      // console.log('parsing done');
      // let fileMD5 = md5.update(new Date()).digest('hex');
      // let fileType = files.upload_file.type.split('/')[1];
      // let fileType = ;
      var md5 = crypto.createHash('md5');
      var upload_file = files.upload_file;
      var fileMd5 = md5.update(upload_file.name + Date.parse(new Date()) / 1000).digest('hex');
      var fileType = upload_file.type.split('/')[1];
      var fileName = fileMd5 + '.' + fileType;
      fs.writeFileSync('public/' + fileName, fs.readFileSync(files.upload_file.path));
      res.send({
        status: 0,
        data: {
          uri: fileName,
          url: 'http://localhost:3333/public/' + fileName
        }
      });
    });
  }, 200);
});

var server = app.listen(3333, function() {
  var host = server.address().address;
  var port = server.address().port;

  console.log('Example app listening at http://%s:%s', host, port);
});