Upload files on AWS-S3 with nodejs

index.js

require('dotenv/config')
const express = require('express');
const multer = require('multer')
const AWS = require('aws-sdk')

const app = express();
const PORT = 3000;

const storage = multer.memoryStorage()
const upload = multer({ storage: storage }).single('file')

const s3 = new AWS.S3({
    accessKeyId: process.env.AWS_AccessKey_Id,
    secretAccessKey: process.env.AWS_Secret_Key
})

app.post('/upload', upload, (req, res) => {
    let fileName = req.file.originalname;

    const params = {
        Bucket: process.env.AWS_BUCKET_NAME,
        Key: fileName,
        Body: req.file.buffer
    }

    s3.upload(params, (error, data) => {
        if (error) {
            res.status(500).send(error)
        }
        res.status(200).send(data)
    })
})

app.listen(PORT, () => {
    console.log(`Server is up and running on Port ${PORT}`);
})