CacheTask for service workers

CacheTasks.js

const CacheTasks = {
  /**
   * Populates the a cache with a list of requests.
   *
   * @param {String} cacheName The name of the cache.
   * @param {Array} requests The requests (URLs or Requests) to cache.
   */
  populateCache: async(function* (cacheName, requests) {
    var cache = yield caches.open(name);
    try {
      yield cache.addAll(requests);
    } catch (err) {
      var msg = `Problem adding resources to cache ${cacheName}`;
      console.warn(msg, err);
    }
  }),
  /**
   * Saves a binary file into a cache.
   *
   * @param {String} cacheName The name of the cache to save into.
   * @param {ArrayBuffer} arrayBuffer The arrayBuffer holding the file's data.
   * @param {String} type MimeType of the data being stored.
   */
  saveBinaryToCache: async(function* (cacheName, arrayBuffer, type, aRequestURL) {
    var cache = yield caches.open(cacheName);
    var dataView = new DataView(arrayBuffer);
    var blob = new Blob([dataView], {
      type
    });
    var responseInit = {
      headers: {
        "Content-Type": type
      }
    };
    var request = new Request(aRequestURL);
    var response = new Response(blob, responseInit);
    var success = true;
    try {
      yield cache.put(request, response);
    } catch (err) {
      var msg = `Error putting blob in cache ${cacheName}`;
      console.warn(msg, err);
      success = false;
    }
    return success;
  }),
}