Upload files to AWS-S3 with NodeJS

aws-s3-multer-nodejs.js

var aws = require('aws-sdk')
var express = require('express')
var multer = require('multer')
var multerS3 = require('multer-s3')

var app = express()
var s3 = new aws.S3({
    accessKeyId: '', 
    secretAccessKey: '',
    region: 'ap-southeast-1'
})

var upload = multer({
  storage: multerS3({
    s3: s3,
    bucket: 'ayaplus-kyc-files',
    metadata: function (req, file, cb) {
      cb(null, {
          fieldName: file.fieldname
        });
    },
    key: function (req, file, cb) {
      cb(null, Date.now().toString())
    }
  })
})

app.post('/upload', upload.array('photos', 3), function(req, res, next) {
  res.send('Successfully uploaded ' + req.files.originalname + ' files!')
})

app.get('/image/:imageId', function (req, res, next) {
    var params = { Bucket: 'ayaplus-kyc-files', Key: req.params.imageId };
    s3.getObject(params, function(err, data) {
        res.writeHead(200, {'Content-Type': 'image/jpeg'});
        res.write(data.Body, 'binary');
        res.end(null, 'binary');
    });
});

app.listen(3000, function () {
    console.log('Example app listening on port 3000!');
});