[base64 data url] #base64 #url #data

getResourceDataUrl.js

import { fetch } from "undici";

/**
 * @param {string} url
 * @param {string} [origin]
 * @returns {Promise<string>}
 */
export async function getResourceDataUrl(url, origin) {
  const fetchUrl = new URL(url, origin);

  const resp = await fetch(fetchUrl);

  const contentType = resp.headers.get("content-type");

  const arrayBuffer = await resp.arrayBuffer();

  const base64Image = Buffer.from(arrayBuffer).toString("base64");

  const dataUri = `data:${contentType};base64,${base64Image}`;

  return dataUri;
}