How to read contents of a csv file in custom app backend logic

Retired Boards Appdev Graphql Basics And Troubleshooting
1

I see I can retrieve a File object that has been uploaded, but how would one read the contents of the file from a custom app, can someone post a code snippet for achieving this?

2 
Here's how I roughly achieved this:

import { GraphqlQueryError } from "@shopify/shopify-api";
import shopify from "./shopify.js";
import fetch from 'node-fetch';

const QUERY_FILES = `   {
  files(first: 10) {
      edges{
      node{
          __typename
          createdAt
          ... on GenericFile {
            id
            url
          }  
        }
      }
    }
  }
`

export default async function someFunction(session) 
{
  const client = new shopify.api.clients.Graphql({ session });

  try {
    const filesqueryresponse = await client.query({
      data: {
        query: QUERY_FILES,
        variables: {}
      }
    });
    const fileurl=filesqueryresponse.body.data.files.edges[0].node.url;

    console.log( 'sucecess: ', fileurl);

    const response = await fetch( fileurl );
    const filecontents = await response.text();
    
    //filecontents now has content of file in string
...
}