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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 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. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 library byte_stream; | 5 library byte_stream; |
6 | 6 |
7 import 'dart:async'; | 7 import 'dart:async'; |
8 import 'dart:convert'; | 8 import 'dart:convert'; |
9 import 'dart:io'; | |
10 import 'dart:typed_data'; | 9 import 'dart:typed_data'; |
11 | 10 |
12 import 'utils.dart'; | 11 import 'utils.dart'; |
13 | 12 |
14 /// A stream of chunks of bytes representing a single piece of data. | 13 /// A stream of chunks of bytes representing a single piece of data. |
15 class ByteStream extends StreamView<List<int>> { | 14 class ByteStream extends StreamView<List<int>> { |
16 ByteStream(Stream<List<int>> stream) | 15 ByteStream(Stream<List<int>> stream) |
17 : super(stream); | 16 : super(stream); |
18 | 17 |
19 /// Returns a single-subscription byte stream that will emit the given bytes | 18 /// Returns a single-subscription byte stream that will emit the given bytes |
20 /// in a single chunk. | 19 /// in a single chunk. |
21 factory ByteStream.fromBytes(List<int> bytes) => | 20 factory ByteStream.fromBytes(List<int> bytes) => |
22 new ByteStream(streamFromIterable([bytes])); | 21 new ByteStream(streamFromIterable([bytes])); |
23 | 22 |
24 /// Collects the data of this stream in a [Uint8List]. | 23 /// Collects the data of this stream in a [Uint8List]. |
25 Future<Uint8List> toBytes() { | 24 Future<Uint8List> toBytes() { |
26 return fold(new BytesBuilder(), (builder, chunk) => builder..add(chunk)) | 25 var completer = new Completer(); |
27 .then((builder) => builder.takeBytes()); | 26 var sink = new ByteConversionSink.withCallback(completer.complete); |
| 27 listen(sink.add, onError: completer.completeError, onDone: sink.close, |
| 28 cancelOnError: true); |
| 29 return completer.future; |
28 } | 30 } |
29 | 31 |
30 /// Collect the data of this stream in a [String], decoded according to | 32 /// Collect the data of this stream in a [String], decoded according to |
31 /// [encoding], which defaults to `UTF8`. | 33 /// [encoding], which defaults to `UTF8`. |
32 Future<String> bytesToString([Encoding encoding=UTF8]) => | 34 Future<String> bytesToString([Encoding encoding=UTF8]) => |
33 toBytes().then((bytes) => encoding.decode(bytes)); | 35 encoding.decodeStream(this); |
34 | 36 |
35 Stream<String> toStringStream([Encoding encoding=UTF8]) => | 37 Stream<String> toStringStream([Encoding encoding=UTF8]) => |
36 transform(encoding.decoder); | 38 transform(encoding.decoder); |
37 } | 39 } |
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