blob: bb06c6954f1781be9c810122da66eec918a32bb6 [file] [log] [blame]
// 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 service_html;
import 'dart:async';
import 'dart:convert';
import 'dart:html';
import 'dart:typed_data';
import 'package:observatory_2/service_common.dart';
// Export the service library.
export 'package:observatory_2/service_common.dart';
class _HtmlWebSocket implements CommonWebSocket {
WebSocket _webSocket;
Future<void> connect(WebSocketVMTarget target, void onOpen(),
void onMessage(dynamic data), void onError(), void onClose()) async {
// The VM service will attempt to redirect our websocket connection request
// to DDS, but the dart:html WebSocket doesn't follow redirects. Instead of
// relying on a redirect, we'll request the websocket URI from the service.
// TODO(bkonyi): re-enable when DDS is enabled. Currently causing Observatory
// failures when running with Flutter (see
/*Uri getWebSocketUriRequest = Uri.parse(target.networkAddress);
getWebSocketUriRequest =
getWebSocketUriRequest.replace(scheme: 'http', pathSegments: [
...getWebSocketUriRequest.pathSegments.where((e) => e != 'ws'),
final response = json.decode(await HttpRequest.getString(
if (!response.containsKey('result') ||
!response['result'].containsKey('uri')) {
target.networkAddress = response['result']['uri'];
_webSocket = new WebSocket(target.networkAddress);
_webSocket.onClose.listen((CloseEvent) => onClose());
_webSocket.onError.listen((Event) => onError());
_webSocket.onOpen.listen((Event) => onOpen());
_webSocket.onMessage.listen((MessageEvent event) => onMessage(;
bool get isOpen => _webSocket.readyState == WebSocket.OPEN;
void send(dynamic data) {
void close() {
Future<ByteData> nonStringToByteData(dynamic data) {
assert(data is Blob);
FileReader fileReader = new FileReader();
return fileReader.onLoadEnd.first.then((e) {
Uint8List result = fileReader.result as Uint8List;
return new ByteData.view(
result.buffer, result.offsetInBytes, result.length);
/// The [WebSocketVM] communicates with a Dart VM over WebSocket. The Dart VM
/// can be embedded in Chromium or standalone. In the case of Chromium, we
/// make the service requests via the Chrome Remote Debugging Protocol.
class WebSocketVM extends CommonWebSocketVM {
WebSocketVM(WebSocketVMTarget target) : super(target, new _HtmlWebSocket());