Delete a bunch of packages that are now on GitHub.

pkg/shelf_web_socket/lib/shelf_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 shelf_web_socket;
-
-import 'package:shelf/shelf.dart';
-
-import 'src/web_socket_handler.dart';
-
-/// A typedef used to determine if a function takes two arguments or not.
-typedef _BinaryFunction(arg1, arg2);
-
-/// Creates a Shelf handler that upgrades HTTP requests to WebSocket
-/// connections.
-///
-/// Only valid WebSocket upgrade requests are upgraded. If a request doesn't
-/// look like a WebSocket upgrade request, a 404 Not Found is returned; if a
-/// request looks like an upgrade request but is invalid, a 400 Bad Request is
-/// returned; and if a request is a valid upgrade request but has an origin that
-/// doesn't match [allowedOrigins] (see below), a 403 Forbidden is returned.
-/// This means that this can be placed first in a [Cascade] and only upgrade
-/// requests will be handled.
-///
-/// The [onConnection] must take a [CompatibleWebSocket] as its first argument.
-/// It may also take a string, the [WebSocket subprotocol][], as its second
-/// argument. The subprotocol is determined by looking at the client's
-/// `Sec-WebSocket-Protocol` header and selecting the first entry that also
-/// appears in [protocols]. If no subprotocols are shared between the client and
-/// the server, `null` will be passed instead. Note that if [onConnection] takes
-/// two arguments, [protocols] must be passed.
-///
-/// [WebSocket subprotocol]: https://tools.ietf.org/html/rfc6455#section-1.9
-///
-/// If [allowedOrigins] is passed, browser connections will only be accepted if
-/// they're made by a script from one of the given origins. This ensures that
-/// malicious scripts running in the browser are unable to fake a WebSocket
-/// handshake. Note that non-browser programs can still make connections freely.
-/// See also the WebSocket spec's discussion of [origin considerations][].
-///
-/// [origin considerations]: https://tools.ietf.org/html/rfc6455#section-10.2
-Handler webSocketHandler(Function onConnection, {Iterable<String> protocols,
-      Iterable<String> allowedOrigins}) {
-  if (protocols != null) protocols = protocols.toSet();
-  if (allowedOrigins != null) {
-    allowedOrigins = allowedOrigins
-        .map((origin) => origin.toLowerCase()).toSet();
-  }
-
-  if (onConnection is! _BinaryFunction) {
-    if (protocols != null) {
-      throw new ArgumentError("If protocols is non-null, onConnection must "
-          "take two arguments, the WebSocket and the protocol.");
-    }
-
-    var innerOnConnection = onConnection;
-    onConnection = (webSocket, _) => innerOnConnection(webSocket);
-  }
-
-  return new WebSocketHandler(onConnection, protocols, allowedOrigins).handle;
-}