Node JS Upload File to Amazon AWS s3 Tutorial

In this tutorial, you will learn how to upload a file to an amazon s3 bucket using node js express with aws-s3, multer package.

How to Upload Files to Amazon s3 bucket using Node JS + Express?

Steps to upload single or multiple files to aws s3 bucket:

Step 1 – Create Node Express js App

Run the following command on cmd to create node js app:

mkdir my-app
cd my-app
npm init -y

Step 2 – Install express, aws-s3, Multer dependencies

Run the following command on cmd to install express, aws-s3 and multer dependencies:

npm install express multer aws-sdk body-parser --save

Step 3 – Create Server.js File

Create server.js file in your application root directory, and follow the below steps:

Import Installed Packages
Configure AWS-S3 Package with Multer
Create Uploading Single File to AWS S3 with Node.js REST API Route
Create Uploading Single File to AWS S3 with Node.js REST API Route

Import Installed Packages

Import above installed dependencies package in server.js file:

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

Configure AWS-S3 Package with Multer

Then configure aws-s3 package with multer as shown below:

var s3 = new aws.S3({
   accessKeyId: " ",
   secretAccessKey: " ",
   Bucket: " "
})
var upload = multer({
   storage: multerS3({
       s3: s3,
       bucket:””,
       metadata: function (req, file, cb) {
           cb(null, { fieldName: file.fieldname });
       },
       key: function (req, file, cb) {
           cb(null, Date.now().toString())
       }
   })
})

Recommended:-Deploy Node JS App to Amazon AWS EC2

Create Uploading Single File to AWS S3 with Node.js REST API Route

The following node js rest api route will be upload single file to amazon s3 bucket:

//Uploading single File to aws s3 bucket
app.post('/upload', upload.single('photos'), function (req, res, next) {
   res.send({
       data: req.files,
       msg: 'Successfully uploaded ' + req.files + ' files!'
   })
})

Create Uploading Multiple File to AWS S3 with Node.js REST API Route

The following node js rest api route will be upload multiple file to amazon s3 bucket:

//Uploading single File to aws s3 bucket
app.post('/upload', upload.single('photos'), function (req, res, next) {
   res.send({
       data: req.files,
       msg: 'Successfully uploaded ' + req.files + ' files!'
   })
})

Step 4 – Start Node Express Js Application

Run the following command on cmd to start node express js server:

//run the below command

npm start

Step 5 – Uploading Files to AWS S3 Bucket with Node.js REST API

To upload single or multiple files to aws s3 bucket using node js rest API; So open postman for sending HTTP multipart/form-data requests: as shown below picture:

Conclusion

That’s it, you have learned how to upload files to the amazon s3 bucket using node js + rest api+ express with the express, aws-s3, multer package.

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