Lists all the content of a given Bucket and Prefix and matches with a RegExp to filter the desired results

aws-sdkv2-s3-list-all-objects-with-suffix.mjs

import S3 from 'aws-sdk/clients/s3.js'

export const s3 = new S3()

const myFilterContents = (s3Response, pattern) => s3Response.Contents.filter(s3Object => pattern.test(s3Object.Key))

export async function listObjectsWithSuffix (Bucket, Prefix, pattern) {
  let myResults = []
  let myS3Response

  const myS3ListParams = {
    Bucket,
    Prefix,
    MaxKeys: 1000,
    ContinuationToken: undefined
  }

  do {
    myS3Response = await s3.listObjectsV2(myS3ListParams).promise()
    myResults = myResults.concat(myFilterContents(myS3Response, pattern))
    myS3ListParams.ContinuationToken = myS3Response.NextContinuationToken
  } while (myS3Response.IsTruncated === true)

  return myResults
}

aws-sdkv3-s3-list-all-objects-with-suffix.mjs

// npm i @aws-sdk/client-s3
// https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/preview/client/s3/command/ListObjectsV2Command/
import { S3Client, ListObjectsV2Command } from "@aws-sdk/client-s3"

const myS3Client = new S3Client();

const myFilterContents = ({ Contents: c }, pattern) => c.filter(s3Object => pattern.test(s3Object.Key))

export async function listObjectsWithSuffix (Bucket, Prefix, myPattern) {
  let myResults = []
  let myS3Response

  const myS3ListParams = {
    Bucket,
    Prefix,
    MaxKeys: 1000,
    ContinuationToken: undefined
  }

  do {
    myS3Response = await myS3Client.send(new ListObjectsV2Command(myS3ListParams))
    myResults = myResults.concat(myFilterContents(myS3Response, myPattern))
    myS3ListParams.ContinuationToken = myS3Response.NextContinuationToken
  } while (myS3Response.IsTruncated === true)

  return myResults
}