send method

@override Future<StreamedResponse> send(BaseRequest request)

Sends an HTTP request and asynchronously returns the response.

Implementers should call BaseRequest.finalize to get the body of the request as a ByteStream. They shouldn't make any assumptions about the state of the stream; it could have data written to it asynchronously at a later point, or it could already be closed when it's returned. Any internal HTTP errors should be wrapped as ClientExceptions.

Implementation

@override
Future<http.StreamedResponse> send(http.BaseRequest request) async {
  if (_credentials.accessToken.hasExpired) {
    final newCredentials = await generateAccessToken();
    notifyAboutNewCredentials(newCredentials);
    _credentials = newCredentials;
    _authClient = authenticatedClient(baseClient, _credentials);
  }

  _authClient ??= authenticatedClient(baseClient, _credentials);
  return _authClient!.send(request);
}