Function readNext

lib/internal/blob.js:419–438

()

  const reader = blob[kHandle].getReader();
  const buffers = [];
  const readNext = () => {
    reader.pull((status, buffer) => {
      if (status === 0) {
        // EOS, concat & resolve
        // buffer should be undefined here
        resolve(concat(buffers));
        return;
      } else if (status < 0) {
        // The read could fail for many different reasons when reading
        // from a non-memory resident blob part (e.g. file-backed blob).
        // The error details the system error code.
        const error = lazyDOMException('The blob could not be read', 'NotReadableError');
        reject(error);
        return;
      }
      if (buffer !== undefined)
        buffers.push(buffer);
      queueMicrotask(() => readNext());
    });
  };
  readNext();
  return promise;
}