saveFile.mjs

// saveFile.mjs
// Node.js v. 14.17

import { mkdir, writeFile } from "fs";
import ky from "ky-universal";
import { join, parse } from "path";
import { promisify } from "util";

const makeDirectory = promisify(mkdir);
const overwriteFile = promisify(writeFile);

export const saveFile = async (
  /** @type {string} */
  url
) => {
  const response = await ky.get(url, {
    headers: {
      cookie:
        "your.token=something;",
    },
  });

  const buffer = await response.arrayBuffer();

  const { pathname } = new URL(url);
  const { dir } = parse(pathname);

  const directory = join(".", dir);
  const path = join(".", pathname);

  await makeDirectory(directory, { recursive: true });

  await overwriteFile(path, Buffer.from(buffer));

  console.log("saved", url);
};