Stop running pub get at gclient sync time and fix build bugs

mojo/public/dart/third_party/http_parser/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.
+
+library http_parser.web_socket;
+
+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";
+}