minh-app.js

const express = require('express');
const fileUpload = require('express-fileupload');
const bodyParser = require('body-parser');
const app = express();

// default options
app.use(fileUpload());
app.use(bodyParser.urlencoded({extended: false}));
app.use(bodyParser.json());

app.use(function (req, res, next) {

    // Website you wish to allow to connect
    res.header('Access-Control-Allow-Origin', '*');

    // Request methods you wish to allow
    res.header('Access-Control-Allow-Methods', 'GET, POST, OPTIONS, PUT, PATCH, DELETE');

    // Request headers you wish to allow
    res.header('Access-Control-Allow-Headers', 'X-Requested-With,content-type, app-key, verify-token');

    // Set to true if you need the website to include cookies in the requests sent
    // to the API (e.g. in case you use sessions)
    res.header('Access-Control-Allow-Credentials', true);

    // Pass to next layer of middleware
    next();
});

app.all("/api/*", function(req, res, next) {
  console.log(req.method);
  console.log(req.url);
  console.log(req.headers);
  console.log(req.body);
  
  if(req.headers['app-key'] !== "CopyXwPp9xazJ0ku5CZnlmgAx2Dld8SHkAeT") {
    return res.sendStatus(404);
  }
  next();
});
 
app.post('/api/signup', function(req, res) {
  console.log(req.headers['verify-token']);
  console.log(req.headers['app-key']);
  if (!req.files)
    return res.status(400).send('No files were uploaded.');
 
  // The name of the input field (i.e. "sampleFile") is used to retrieve the uploaded file
  let avatar = req.files.avatar;
 
  // Use the mv() method to place the file somewhere on your server
  avatar.mv('./nana.jpg', function(err) {
    if (err)
      return res.status(500).send(err);
 
    res.send('File uploaded!');
  });
});

app.listen(3001, () => console.log("Server running at port: " + 3001));