51 lines
1.4 KiB
Dart
51 lines
1.4 KiB
Dart
import 'dart:async';
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import 'dart:io';
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import 'dart:typed_data';
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import 'package:web_socket_channel/io.dart';
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import 'package:web_socket_channel/web_socket_channel.dart';
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import 'websocket_transport_base.dart';
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/// Native (Linux + Android) WebSocket transport using IOWebSocketChannel.
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class WebSocketTransport extends WebSocketTransportBase {
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WebSocketTransport({
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super.initialReconnectDelay,
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super.maxReconnectDelay,
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super.backoffFactor,
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});
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WebSocketChannel? _channel;
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StreamSubscription<dynamic>? _sub;
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@override
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Future<void> openPlatform(String url) async {
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_channel = IOWebSocketChannel.connect(
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Uri.parse(url),
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pingInterval: const Duration(seconds: 10),
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);
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// Awaiting `ready` surfaces connection failures as exceptions.
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await _channel!.ready;
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_sub = _channel!.stream.listen(
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(dynamic message) {
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if (message is Uint8List) {
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onBytes(message);
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} else if (message is List<int>) {
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onBytes(Uint8List.fromList(message));
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}
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// String messages are ignored — server should send binary protobuf.
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},
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onError: (_) => onChannelClosed(),
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onDone: onChannelClosed,
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cancelOnError: true,
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);
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}
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@override
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Future<void> _closePlatform() async {
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await _sub?.cancel();
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_sub = null;
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await _channel?.sink.close(WebSocketStatus.normalClosure);
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_channel = null;
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}
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} |