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I have a Node.JS app using mLab as a DB and also AWS/S3 to store files. I just implemented a functionality allowing the user to erase information from the mLab DB, this works fine.

The one thing I still have to do is to erase possible relevant information from AWS/S3, and this I don't know how to do yet.

I have already browsed the net and seen a couple of things, but nothing quite satisfying.

Can someone tell exactly (if possible clearly and simply) what I need to do (necessary npm module if there is, etc...) to be able to delete objects from my AWS/S3 bucket. A good tutorial on the subject would also be fine if there is any.

Michel
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2 Answers2

1

AWS provides an SDK for JavaScript. First, ensure that you have set your credentials in whatever way makes sense for you. Next install the sdk:

npm i aws-sdk

Deleting an object from a bucket:

const AWS = require('aws-sdk');
const s3 = new AWS.S3();

const params = {
  Bucket: 'examplebucket', 
  Key: 'objectkey.jpg'
};

s3.deleteObject(params, function(err, data) {
  if (err) {
    console.log(err, err.stack); // an error occurred
  else {
    console.log(data);           // successful response
  }
});

A couple of notes:

  • There is also a deleteObjects function that can delete multiple objects with one call.
  • Optional but recommended, if you are using a recent version of node, you can use util.promisify to turn the callback style that the AWS sdk uses into promises.
Andy Gaskell
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Using the SDK for JavaScript (v3) is easier; you just need to follow a few steps to delete an object.

First install the @aws-sdk/client-s3 package:

Using npm:(more package installer)

npm install @aws-sdk/client-s3

Import DeleteObjectCommand and S3Client from @aws-sdk/client-s3

import { DeleteObjectCommand, S3Client } from "@aws-sdk/client-s3";

Create a new instance:

const s3Client = new S3Client({});

Create an asynchronous function for delete an object:

export const deleteObject = async () => {
  const deleteCommand = new DeleteObjectCommand({
    Bucket: "bucket_name",
    Key: "your_object_name_with_file_extension", // kayes_note.txt
  });

  try {
    const response = await s3Client.send(deleteCommand);
    console.log(response);
  } catch (err) {
    console.error(err);
  }
};

For more info, see official documentation here.

Kayes
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