插件 stomp_dart_client 简单使用

初始化插件使用

useSockJS 的设置 是否使用SockJS

onConnect 连接后的回调

onDisconnect 断开连接的回调

url服务地址

// 初始化StompClient 链接
late StompClient _client;
Future<void> init() async {
  if (_initialized) return;
  _initialized = true;

  final url = 'wss:// you.server.com/ws';
  _client = StompClient(
    config: StompConfig(
      url: url,
      onConnect: _onConnectCallback,
      onStompError: (frame) => log('STOMP 错误: ${frame.body}'),
      onWebSocketError: (error) => log('WebSocket 错误: $error'),
      onDisconnect: (_) => _connected = false,
      onDebugMessage: (msg) => log('[STOMP DEBUG] $msg'),
  //    useSockJS: true,
    ),
  );
  _client.activate();
}

激活

_client.activate();

连接后的回调

/// 建立连接后的回调
void _onConnectCallback(StompFrame connectFrame) {
  _connected = true;
  log('✅ STOMP 已连接');
  _subscribeToMessages();
  _loadHistory();
}

订阅消息

void _subscribeToMessages() {
  if (_subscribed) return;
  _client.subscribe(
    destination: '订阅通道',
    callback: (StompFrame frame) {
      if (frame.body != null) {
        final body = frame.body!;
 
        final data = jsonDecode(body);
        addMessage(
          data['content'] ?? body,
        );
      }
    },
  );

  _subscribed = true;
}

发送消息

void send(String text) {
  if (!_connected || text.trim().isEmpty) return;
  addMessage(text, isMine: true);
  final payload = {
    'content': text,
  };
  _client.send(
    destination: '发送通道',
    body: jsonEncode(payload),
  );
}

断开连接

/// 主动断开连接（如退出页面）
void disconnect() {
  _client.deactivate();
  _connected = false;
  _initialized = false;
  _subscribed = false;
  messages.clear();
}