110 lines
3.2 KiB
Dart
110 lines
3.2 KiB
Dart
/// Browser WebSocket client library for the Angel framework.
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library angel_websocket.browser;
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import 'dart:async';
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import 'dart:html';
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import 'package:angel_client/angel_client.dart';
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import 'package:angel_http_exception/angel_http_exception.dart';
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import 'package:http/browser_client.dart' as http;
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import 'package:web_socket_channel/web_socket_channel.dart';
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import 'package:web_socket_channel/html.dart';
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import 'base_websocket_client.dart';
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export 'angel_websocket.dart';
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final RegExp _straySlashes = RegExp(r"(^/)|(/+$)");
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/// Queries an Angel server via WebSockets.
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class WebSockets extends BaseWebSocketClient {
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final List<BrowserWebSocketsService> _services = [];
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WebSockets(baseUrl,
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{bool reconnectOnClose = true, Duration reconnectInterval})
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: super(http.BrowserClient(), baseUrl,
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reconnectOnClose: reconnectOnClose,
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reconnectInterval: reconnectInterval);
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@override
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Future close() {
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for (var service in _services) {
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service.close();
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}
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return super.close();
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}
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@override
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Stream<String> authenticateViaPopup(String url,
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{String eventName = 'token', String errorMessage}) {
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var ctrl = StreamController<String>();
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var wnd = window.open(url, 'angel_client_auth_popup');
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Timer t;
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StreamSubscription<Event> sub;
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t = Timer.periodic(Duration(milliseconds: 500), (timer) {
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if (!ctrl.isClosed) {
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if (wnd.closed) {
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ctrl.addError(AngelHttpException.notAuthenticated(
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message:
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errorMessage ?? 'Authentication via popup window failed.'));
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ctrl.close();
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timer.cancel();
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sub?.cancel();
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}
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} else
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timer.cancel();
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});
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sub = window.on[eventName ?? 'token'].listen((e) {
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if (!ctrl.isClosed) {
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ctrl.add((e as CustomEvent).detail.toString());
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t.cancel();
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ctrl.close();
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sub.cancel();
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}
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});
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return ctrl.stream;
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}
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@override
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Future<WebSocketChannel> getConnectedWebSocket() {
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var url = websocketUri;
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if (authToken?.isNotEmpty == true) {
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url = url.replace(
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queryParameters: Map<String, String>.from(url.queryParameters)
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..['token'] = authToken);
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}
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var socket = WebSocket(url.toString());
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var completer = Completer<WebSocketChannel>();
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socket
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..onOpen.listen((_) {
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if (!completer.isCompleted)
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return completer.complete(HtmlWebSocketChannel(socket));
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})
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..onError.listen((e) {
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if (!completer.isCompleted)
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return completer.completeError(e is ErrorEvent ? e.error : e);
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});
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return completer.future;
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}
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@override
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BrowserWebSocketsService<Id, Data> service<Id, Data>(String path,
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{Type type, AngelDeserializer<Data> deserializer}) {
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String uri = path.replaceAll(_straySlashes, '');
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return BrowserWebSocketsService<Id, Data>(socket, this, uri,
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deserializer: deserializer);
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}
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}
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class BrowserWebSocketsService<Id, Data> extends WebSocketsService<Id, Data> {
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final Type type;
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BrowserWebSocketsService(WebSocketChannel socket, WebSockets app, String uri,
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{this.type, AngelDeserializer<Data> deserializer})
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: super(socket, app, uri, deserializer: deserializer);
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}
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