blob method
Returns a promise that resolves with a Blob representation of the request body.
Implementation
Future<Blob> blob() async {
throwIfBodyUsed();
_storage[#bodyUsed] = true;
final existing = _storage[#blob];
if (existing is Blob) return existing;
final chunks = <Uint8List>[];
await for (final Uint8List chunk in body ?? Stream.empty()) {
chunks.add(chunk);
}
final blob = Blob(chunks,
type: headers.get('Content-Type') ?? 'application/octet-stream');
return _storage[#blob] = blob;
}