@woleet/woleet-weblibs/lib/browser/woleet-hashfile-worker.js

Woleet web libraries

/**
 * @namespace woleet
 */

const _in_worker = true;

(() => {
  /* crypto-js lib: minified version */
  try {
    importScripts('woleet-crypto.min.js');
  }
  catch ({ message }) {
    postMessage({ error: message });
    return;
  }

  let hash = null;
  self.onmessage = (event) => {
    try {
      switch (event.data.action) {
        case 'start' :
          if (hash) throw new Error('not_ready');
          hash = woleet.crypto.createHash('sha256');
          postMessage({ start: true });
          break;
        case 'update' :
          hash.update(new Uint8Array(event.data.chunk));
          postMessage({ progress: true });
          break;
        case 'finalize' :
          postMessage({ result: hash.digest('hex') });
          hash = null;
          break;
        case 'reset' :
          postMessage({ reset: true });
          hash = null;
          break;
      }
    }
    catch ({ message }) {
      postMessage({ error: message });
    }
  };

})();