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1 // Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file | 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 | 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 import 'dart:async'; | 5 import 'dart:async'; |
6 | 6 |
7 import 'package:async/async.dart'; | 7 import 'package:async/async.dart'; |
8 import 'package:crypto/crypto.dart'; | 8 import 'package:crypto/crypto.dart'; |
9 import 'package:stream_channel/stream_channel.dart'; | 9 import 'package:stream_channel/stream_channel.dart'; |
10 | 10 |
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55 WebSocketSink get sink => new WebSocketSink._(_webSocket); | 55 WebSocketSink get sink => new WebSocketSink._(_webSocket); |
56 | 56 |
57 /// Signs a `Sec-WebSocket-Key` header sent by a WebSocket client as part of | 57 /// Signs a `Sec-WebSocket-Key` header sent by a WebSocket client as part of |
58 /// the [initial handshake][]. | 58 /// the [initial handshake][]. |
59 /// | 59 /// |
60 /// The return value should be sent back to the client in a | 60 /// The return value should be sent back to the client in a |
61 /// `Sec-WebSocket-Accept` header. | 61 /// `Sec-WebSocket-Accept` header. |
62 /// | 62 /// |
63 /// [initial handshake]: https://tools.ietf.org/html/rfc6455#section-4.2.2 | 63 /// [initial handshake]: https://tools.ietf.org/html/rfc6455#section-4.2.2 |
64 static String signKey(String key) { | 64 static String signKey(String key) { |
65 var hash = new SHA1(); | |
66 // We use [codeUnits] here rather than UTF-8-decoding the string because | 65 // We use [codeUnits] here rather than UTF-8-decoding the string because |
67 // [key] is expected to be base64 encoded, and so will be pure ASCII. | 66 // [key] is expected to be base64 encoded, and so will be pure ASCII. |
68 hash.add((key + webSocketGUID).codeUnits); | 67 return BASE64.encode(sha1.convert((key + webSocketGUID).codeUnits).bytes); |
69 return CryptoUtils.bytesToBase64(hash.close()); | |
70 } | 68 } |
71 | 69 |
72 /// Creates a new WebSocket handling messaging across an existing [channel]. | 70 /// Creates a new WebSocket handling messaging across an existing [channel]. |
73 /// | 71 /// |
74 /// This is a cross-platform constructor; it doesn't use either `dart:io` or | 72 /// This is a cross-platform constructor; it doesn't use either `dart:io` or |
75 /// `dart:html`. It's also HTTP-API-agnostic, which means that the initial | 73 /// `dart:html`. It's also HTTP-API-agnostic, which means that the initial |
76 /// [WebSocket handshake][] must have already been completed on the socket | 74 /// [WebSocket handshake][] must have already been completed on the socket |
77 /// before this is called. | 75 /// before this is called. |
78 /// | 76 /// |
79 /// [protocol] should be the protocol negotiated by this handshake, if any. | 77 /// [protocol] should be the protocol negotiated by this handshake, if any. |
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111 /// | 109 /// |
112 /// [closeCode] and [closeReason] are the [close code][] and [reason][] sent | 110 /// [closeCode] and [closeReason] are the [close code][] and [reason][] sent |
113 /// to the remote peer, respectively. If they are omitted, the peer will see | 111 /// to the remote peer, respectively. If they are omitted, the peer will see |
114 /// a "no status received" code with no reason. | 112 /// a "no status received" code with no reason. |
115 /// | 113 /// |
116 /// [close code]: https://tools.ietf.org/html/rfc6455#section-7.1.5 | 114 /// [close code]: https://tools.ietf.org/html/rfc6455#section-7.1.5 |
117 /// [reason]: https://tools.ietf.org/html/rfc6455#section-7.1.6 | 115 /// [reason]: https://tools.ietf.org/html/rfc6455#section-7.1.6 |
118 Future close([int closeCode, String closeReason]) => | 116 Future close([int closeCode, String closeReason]) => |
119 _webSocket.close(closeCode, closeReason); | 117 _webSocket.close(closeCode, closeReason); |
120 } | 118 } |
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