| // Copyright (c) 2016, 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:async" show Future, Stream; |
| import "dart:convert" show Encoding; |
| |
| /// Resource loading strategy. |
| /// |
| /// An abstraction of the functionality needed to load resources. |
| /// |
| /// Implementations of this interface decide which URI schemes they support. |
| abstract class ResourceLoader { |
| /// Reads the file located by [uri] as a stream of bytes. |
| Stream<List<int>> openRead(Uri uri); |
| |
| /// Reads the file located by [uri] as a list of bytes. |
| Future<List<int>> readAsBytes(Uri uri); |
| |
| /// Reads the file located by [uri] as a [String]. |
| /// |
| /// The file bytes are decoded using [encoding], if provided. |
| /// |
| /// If [encoding] is omitted, the default for the `file:` scheme is UTF-8. |
| /// For `http`, `https` and `data` URIs, the Content-Type header's charset |
| /// is used, if available and recognized by [Encoding.getByName], |
| /// otherwise it defaults to Latin-1 for `http` and `https` |
| /// and to ASCII for `data` URIs. |
| Future<String> readAsString(Uri uri, {Encoding encoding}); |
| } |
| |