Fetch RSS and Convert to JSON

fetchRssConvert2JSON.js

const RSS_URL = `https://cors-anywhere.herokuapp.com/https://archive.org/services/collection-rss.php?collection=podcast_jeff-regan-the-great-detec_426081250`;

const xmlToJson = (xml) => {
  let obj = {};

  try {
    xml.hasChildNodes();
  } catch (err) {
    xml = new DOMParser().parseFromString(xml, "text/xml");
  }

  if (xml.nodeType === 1) {
    if (xml.attributes.length > 0) {
      obj["@attributes"] = {};
      for (let j = 0; j < xml.attributes.length; j += 1) {
        const attribute = xml.attributes.item(j);
        obj["@attributes"][attribute.nodeName] = attribute.nodeValue;
      }
    }
  } else if (xml.nodeType === 3) {
    obj = xml.nodeValue;
  }

  if (
    xml.hasChildNodes() &&
    xml.childNodes.length === 1 &&
    xml.childNodes[0].nodeType === 3
  ) {
    obj = xml.childNodes[0].nodeValue;
  } else if (xml.hasChildNodes()) {
    for (let i = 0; i < xml.childNodes.length; i += 1) {
      const item = xml.childNodes.item(i);
      const nodeName = item.nodeName;
      if (typeof obj[nodeName] === "undefined") {
        obj[nodeName] = xmlToJson(item);
      } else {
        if (typeof obj[nodeName].push === "undefined") {
          const old = obj[nodeName];
          obj[nodeName] = [];
          obj[nodeName].push(old);
        }
        obj[nodeName].push(xmlToJson(item));
      }
    }
  }
  return obj;
};

const rssFetch = async () => {
  const initial = await fetch(RSS_URL);
  const initialXml = await initial.text();
  const xmlJson = xmlToJson(initialXml);

  return xmlJson;
};

rssFetch().then((resp) => {
  console.log(resp);
});