1. override
Future<String> read(url, { Map<String, String> headers })

Sends an HTTP GET request with the given headers to the given URL, which can be a Uri or a String, and returns a Future that completes to the body of the response as a String.

The Future will emit a ClientException if the response doesn't have a success status code.

For more fine-grained control over the request and response, use send or get instead.

Source 

@override
Future<String> read(dynamic url, {Map<String, String> headers}) {
  return get(url, headers: headers).then((Response response) {
    _checkResponseSuccess(url, response);
    return response.body;
  });
}