how to retrieve image from s3 with nodejs

Question

Please let me know how to retrieve image from s3 with nodejs? Honestly, I could upload an image to s3 with nodejs as follows but the problem is how can I complete to retrieve image from s3?

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!');
});

Answer 1

I've finally found that,

var params = { Bucket: config.bucket, 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');
});

Answer 2

You're looking for the getObject() method.