This NodeJS API which will upload files onto the AWS S3 Bucket. Video -> https://youtu.be/TtuCCfren_I

FileUpload.js

require('dotenv/config')

const express = require('express')
const multer = require('multer')
const AWS = require('aws-sdk')
const uuid = require('uuid/v4')

const app = express()
const port = 3000

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

const storage = multer.memoryStorage({
    destination: function(req, file, callback) {
        callback(null, '')
    }
})

const upload = multer({storage}).single('image')

app.post('/upload',upload,(req, res) => {

    let myFile = req.file.originalname.split(".")
    const fileType = myFile[myFile.length - 1]

    const params = {
        Bucket: process.env.AWS_BUCKET_NAME,
        Key: `${uuid()}.${fileType}`,
        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 at ${port}`)
})

I was getting error from aws-sdk,
the reason was using " " in .env file .
You should store AWS_ID, AWS_SECRET and AWS_BUCKET_NAME without " " around them.

Just wanted to mention that the new recommended structure is this:

const s3 = new AWS.S3({
    credentials: {
        accessKeyId: process.env.AWS_ACCESS_KEY_ID,
        secretAccessKey: process.env.AWS_SECRET_ACCESS_KEY,
    },
});

Error : expected 0 arguments, but got 1.ts(2554) when usgin multer.memmoryStorage({....}) why

thanks bro for sharing beautifull and simple code example 🙏