Add a WebSocketChannel class.

lib/src/web_socket.dart

 // Copyright (c) 2014, 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';
-
-import 'package:crypto/crypto.dart';
-
-import 'copy/web_socket_impl.dart';
-
-/// An implementation of the WebSocket protocol that's not specific to "dart:io"
-/// or to any particular HTTP API.
-///
-/// Because this is HTTP-API-agnostic, it doesn't handle the initial [WebSocket
-/// handshake][]. This needs to be handled manually by the user of the code.
-/// Once that's been done, [new CompatibleWebSocket] can be called with the
-/// underlying socket and it will handle the remainder of the protocol.
-///
-/// [WebSocket handshake]: https://tools.ietf.org/html/rfc6455#section-4
-abstract class CompatibleWebSocket implements Stream, StreamSink {
-  /// The interval for sending ping signals.
-  ///
-  /// If a ping message is not answered by a pong message from the peer, the
-  /// `WebSocket` is assumed disconnected and the connection is closed with a
-  /// [WebSocketStatus.GOING_AWAY] close code. When a ping signal is sent, the
-  /// pong message must be received within [pingInterval].
-  ///
-  /// There are never two outstanding pings at any given time, and the next ping
-  /// timer starts when the pong is received.
-  ///
-  /// By default, the [pingInterval] is `null`, indicating that ping messages
-  /// are disabled.
-  Duration pingInterval;
-
-  /// The [close code][] set when the WebSocket connection is closed.
-  ///
-  /// [close code]: https://tools.ietf.org/html/rfc6455#section-7.1.5
-  ///
-  /// Before the connection has been closed, this will be `null`.
-  int get closeCode;
-
-  /// The [close reason][] set when the WebSocket connection is closed.
-  ///
-  /// [close reason]: https://tools.ietf.org/html/rfc6455#section-7.1.6
-  ///
-  /// Before the connection has been closed, this will be `null`.
-  String get closeReason;
-
-  /// Signs a `Sec-WebSocket-Key` header sent by a WebSocket client as part of
-  /// the [initial handshake].
-  ///
-  /// The return value should be sent back to the client in a
-  /// `Sec-WebSocket-Accept` header.
-  ///
-  /// [initial handshake]: https://tools.ietf.org/html/rfc6455#section-4.2.2
-  static String signKey(String key) {
-    var hash = new SHA1();
-    // We use [codeUnits] here rather than UTF-8-decoding the string because
-    // [key] is expected to be base64 encoded, and so will be pure ASCII.
-    hash.add((key + webSocketGUID).codeUnits);
-    return CryptoUtils.bytesToBase64(hash.close());
-  }
-
-  /// Creates a new WebSocket handling messaging across an existing socket.
-  ///
-  /// Because this is HTTP-API-agnostic, the initial [WebSocket handshake][]
-  /// must have already been completed on the socket before this is called.
-  ///
-  /// If [stream] is also a [StreamSink] (for example, if it's a "dart:io"
-  /// `Socket`), it will be used for both sending and receiving data. Otherwise,
-  /// it will be used for receiving data and [sink] will be used for sending it.
-  ///
-  /// [protocol] should be the protocol negotiated by this handshake, if any.
-  ///
-  /// If this is a WebSocket server, [serverSide] should be `true` (the
-  /// default); if it's a client, [serverSide] should be `false`.
-  ///
-  /// [WebSocket handshake]: https://tools.ietf.org/html/rfc6455#section-4
-  factory CompatibleWebSocket(Stream<List<int>> stream,
-        {StreamSink<List<int>> sink, String protocol, bool serverSide: true}) {
-    if (sink == null) {
-      if (stream is! StreamSink) {
-        throw new ArgumentError("If stream isn't also a StreamSink, sink must "
-            "be passed explicitly.");
-      }
-      sink = stream as StreamSink;
-    }
-
-    return new WebSocketImpl.fromSocket(stream, sink, protocol, serverSide);
-  }
-
-  /// Closes the web socket connection.
-  ///
-  /// [closeCode] and [closeReason] are the [close code][] and [reason][] sent
-  /// to the remote peer, respectively. If they are omitted, the peer will see
-  /// a "no status received" code with no reason.
-  ///
-  /// [close code]: https://tools.ietf.org/html/rfc6455#section-7.1.5
-  /// [reason]: https://tools.ietf.org/html/rfc6455#section-7.1.6
-  Future close([int closeCode, String closeReason]);
-}
-
-/// An exception thrown by [CompatibleWebSocket].
-class CompatibleWebSocketException implements Exception {
-  final String message;
-
-  CompatibleWebSocketException([this.message]);
-
-  String toString() => message == null
-      ? "CompatibleWebSocketException" :
-        "CompatibleWebSocketException: $message";
-}
+export 'web_socket/channel.dart';
+export 'web_socket/deprecated.dart';
+export 'web_socket/exception.dart';