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| 1 // Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file |
| 2 // for details. All rights reserved. Use of this source code is governed by a |
| 3 // BSD-style license that can be found in the LICENSE file. |
| 4 |
| 5 import 'dart:async'; |
| 6 |
| 7 import 'package:async/async.dart'; |
| 8 import 'package:shelf/shelf.dart'; |
| 9 |
| 10 class AsyncHandler { |
| 11 final ResultFuture<Handler> _future; |
| 12 |
| 13 AsyncHandler(Future<Handler> future) : _future = new ResultFuture(future); |
| 14 |
| 15 call(Request request) { |
| 16 if (_future.result == null) { |
| 17 return _future.then((handler) => handler(request)); |
| 18 } |
| 19 |
| 20 if (_future.result.isError) return _future; |
| 21 |
| 22 return _future.result.asValue.value(request); |
| 23 } |
| 24 } |
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