Don't throw SocketExceptions in websocket.

tests/standalone/io/web_socket_error_test.dart

+// Copyright (c) 2013, 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.
+//
+// VMOptions=
+// VMOptions=--short_socket_read
+// VMOptions=--short_socket_write
+// VMOptions=--short_socket_read --short_socket_write
+
+library dart.io;
+
+import "dart:async";
+import "dart:io";
+import "dart:typed_data";
+
+import "package:async_helper/async_helper.dart";
+import "package:expect/expect.dart";
+import "package:path/path.dart";
+
+part "../../../sdk/lib/io/crypto.dart";
+
+
+const String webSocketGUID = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
+const String CERT_NAME = 'localhost_cert';
+const String HOST_NAME = 'localhost';
+
+/**
+ * A SecurityConfiguration lets us run the tests over HTTP or HTTPS.
+ */
+class SecurityConfiguration {
+  final bool secure;
+
+  SecurityConfiguration({bool this.secure});
+
+  Future<HttpServer> createServer({int backlog: 0}) =>
+      secure ? HttpServer.bindSecure(HOST_NAME,
+                                     0,
+                                     backlog: backlog,
+                                     certificateName: CERT_NAME)
+             : HttpServer.bind(HOST_NAME,
+                               0,
+                               backlog: backlog);
+
+  Future<WebSocket> createClient(int port) =>
+    WebSocket.connect('${secure ? "wss" : "ws"}://$HOST_NAME:$port/');
+
+
+  void testForceCloseServerEnd(int totalConnections) {
+    createServer().then((server) {
+      server.listen((request) {
+        var response = request.response;
+        response.statusCode = HttpStatus.SWITCHING_PROTOCOLS;
+        response.headers.set(HttpHeaders.CONNECTION, "upgrade");
+        response.headers.set(HttpHeaders.UPGRADE, "websocket");
+        String key = request.headers.value("Sec-WebSocket-Key");
+        _SHA1 sha1 = new _SHA1();
+        sha1.add("$key$webSocketGUID".codeUnits);
+        String accept = _CryptoUtils.bytesToBase64(sha1.close());
+        response.headers.add("Sec-WebSocket-Accept", accept);
+        response.headers.contentLength = 0;
+        response.detachSocket().then((socket) {
+          socket.destroy();
+        });
+      });
+
+      int closeCount = 0;
+      for (int i = 0; i < totalConnections; i++) {
+        createClient(server.port).then((webSocket) {
+          webSocket.add("Hello, world!");
+          webSocket.listen(
+              (message) {
+                Expect.fail("unexpected message");
+              },
+              onDone: () {
+                closeCount++;
+                if (closeCount == totalConnections) {
+                  server.close();
+                }
+              });
+          });
+      }
+    });
+  }
+
+  void runTests() {
+    testForceCloseServerEnd(10);
+  }
+}
+
+
+void initializeSSL() {
+  var testPkcertDatabase = join(dirname(Platform.script), 'pkcert');
+  SecureSocket.initialize(database: testPkcertDatabase,
+                          password: "dartdart");
+}
+
+
+main() {
+  asyncStart();
+  new SecurityConfiguration(secure: false).runTests();
+  initializeSSL();
+  new SecurityConfiguration(secure: true).runTests();
+  asyncEnd();
+}
+