study_express/10-upload/app.js

/*
 * @Author: Johnhong9527
 * @Date:   2019-06-04 16:44:30
 * @Last Modified by:   Johnhong9527
 * @Last Modified time: 2019-06-04 17:03:07
 */

const express = require('express');
const app = express();
const fs = require('fs');
var formidable = require('formidable');
//allow custom header and CORS
app.all('*', function(req, res, next) {
  res.header('Access-Control-Allow-Origin', '*');
  res.header(
    'Access-Control-Allow-Headers',
    'Content-Type, Content-Length, Authorization, Accept, X-Requested-With , yourHeaderFeild'
  );
  res.header('Access-Control-Allow-Methods', 'PUT, POST, GET, DELETE, OPTIONS');

  if (req.method == 'OPTIONS') {
    res.send(200);
    /让options请求快速返回/;
  } else {
    next();
  }
});
app.post('/upload.do', (req, res) => {
  var form = new formidable.IncomingForm();
  console.log('about to parse');
  form.parse(req, function(error, fields, files) {
    console.log('parsing done');
    console.log(files);
    fs.writeFileSync('public/test.png', fs.readFileSync(files.upload.path));
    res.redirect('/public/upload.html');
    res.send({
      uid: Date.parse(new Date()) / 1000,
      url: ''
    });
  });
  /*作者：深蓝一人
    链接：https://juejin.im/post/5a1a80a5f265da43333e1b88
    来源：掘金
    著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。*/
});
app.get('/', (req, res) => {
  res.send('hello');
});
app.listen(3333, function() {
  console.log('to http://localhost:3333');
});