How to upload and delete images from your AWS S3 bucket with NodeJS

awss3-upload-delete-image-nodejs.js

// npm i aws-sdk
const AWS = require('aws-sdk')
// npm i uuid
const uuidv4 = require('uuid/v4');

let s3 = null;

if (!s3) {
  // Get these credential from the file you downloaded in your console
  // https://help.bittitan.com/hc/en-us/articles/115008255268-How-do-I-find-my-AWS-Access-Key-and-Secret-Access-Key
  s3 = new AWS.S3({
    accessKeyId: process.env.ACCESS_KEY_ID,
    secretAccessKey: process.env.SECRET_ACCESS_KEY
  })
}

const uploadImage = (base64Data) {
  return new Promise(async (resolve, reject) => {
    if (!base64Data) {
      reject('Base64 image is required');
    }

    const photoId = uuidv4();
    const pureBase64 = base64Data.replace(/^data:image\/\w+;base64,/, "")
    const imageBuffer = new Buffer(pureBase64, 'base64');

    const params = {
      Bucket: process.env.BUCKET_NAME, // This is the name you gave to your bucket in your AWS console
      Key: `${photoId}.jpg`, 
      Body: imageBuffer,
      ContentEncoding: 'base64',
      ContentType: 'image/jpeg'
    };

    s3.upload(params, (s3Err, data) => {
      if (s3Err) reject(s3Err);
      const photoUrl = data.Location
      // photoId - This should be saved in your database, then when you need to delete the image you just use it
      resolve({ photoUrl, photoId });
    });
  });
}

const deleteImage = (photoId) => {
  return new Promise((resolve, reject) => {
    if (!photoId) {
      reject('PhotoId is required');
    }

    try {
      s3.deleteObject({
        Bucket: process.env.BUCKET_NAME,
        Key: `${photoId}.jpg`
      }, 
        error =>  error ? reject(error) : resolve(true)
      )
    } catch (error) {
      reject(error);
    }
  });
}

module.exports = {
  deleteImage, 
  uploadImage,
}

To make your images public:

Short answer: https://stackoverflow.com/a/4709391/8817146
Long answer: https://aws.amazon.com/premiumsupport/knowledge-center/read-access-objects-s3-bucket/