@codegenie/serverless-express/src/event-sources/aws/s3.js

This library enables you to utilize AWS Lambda and Amazon API Gateway to respond to web and API requests using your existing Node.js application framework.

const getRequestValuesFromS3 = ({ event }) => {
  const method = 'POST'
  const headers = { host: 's3.amazonaws.com' }
  const body = event

  return {
    method,
    headers,
    body
  }
}

const getResponseToS3 = ({
  statusCode,
  body,
  headers,
  isBase64Encoded
}) => ({
  statusCode,
  headers,
  body,
  isBase64Encoded
})

module.exports = {
  getRequest: getRequestValuesFromS3,
  getResponse: getResponseToS3
}