pkgs/oauth2/lib/src/utils.dart

// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'dart:convert';

/// Adds additional query parameters to [url], overwriting the original
/// parameters if a name conflict occurs.
Uri addQueryParameters(Uri url, Map<String, String> parameters) => url.replace(
    queryParameters: Map.from(url.queryParameters)..addAll(parameters));

String basicAuthHeader(String identifier, String secret) {
  var userPass = '${Uri.encodeFull(identifier)}:${Uri.encodeFull(secret)}';
  return 'Basic ${base64Encode(ascii.encode(userPass))}';
}