title: how to retrieve image from s3 with nodejs
body: <p>Please let me know how to retrieve image from s3 with nodejs? Honestly, I could upload an image to s3 with <code>nodejs</code> as follows but the problem is how can I complete to retrieve image from s3?</p>
  
  <pre><code>router.get('/image/:imageId', function (req, res, next) {
      // ????
  });
  
  var s3 = new aws.S3({ accessKeyId: config.awsAccessId, secretAccessKey: config.awsAccessKey}); 
  var upload = multer({
      storage: multerS3({
          s3: s3,
          bucket: config.bucket,
          key: function (req, file, cb) {
              cb(null, file.originalname);
          }
      })
  });
  
  router.post('/upload/:id', upload.array('file', 3), function(req, res, next) {
      res.send('Successfully uploaded ' + req.files.length + ' files!');
  });
  </code></pre>