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Fix terminal reconnect stability and agent errors

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This commit is contained in:
sladro 2026-04-04 18:39:34 +08:00
parent c96d52142b
commit cb6def34b8
12 changed files with 464 additions and 20 deletions
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12
apps/mobile_app/lib/core/network/agent_api_client.dart
View File

@ -1,7 +1,17 @@
import 'package:dio/dio.dart';
class AgentApiClient {
AgentApiClient(this.baseUri, {Dio? dio}) : _dio = dio ?? Dio();
AgentApiClient(this.baseUri, {Dio? dio}) : _dio = dio ?? Dio() {
_dio.options = _dio.options.copyWith(
connectTimeout: _dio.options.connectTimeout ?? _defaultConnectTimeout,
sendTimeout: _dio.options.sendTimeout ?? _defaultSendTimeout,
receiveTimeout: _dio.options.receiveTimeout ?? _defaultReceiveTimeout,
);
}
static const Duration _defaultConnectTimeout = Duration(seconds: 8);
static const Duration _defaultSendTimeout = Duration(seconds: 10);
static const Duration _defaultReceiveTimeout = Duration(seconds: 20);
final Uri baseUri;
final Dio _dio;

42
apps/mobile_app/lib/core/network/agent_error_formatter.dart
View File

@ -14,5 +14,47 @@ String formatAgentError(Object error, {String fallback = 'Request failed.'}) {
}
}
if (error case DioException dioError) {
final origin = _describeAgentOrigin(dioError.requestOptions);
switch (dioError.type) {
case DioExceptionType.connectionTimeout:
case DioExceptionType.connectionError:
return 'Cannot reach the agent${origin == null ? '' : ' at $origin'}. '
'Check that the desktop agent is running and that the agent URL is correct, then try again.';
case DioExceptionType.badCertificate:
return 'The certificate presented by the agent${origin == null ? '' : ' at $origin'} '
'is not trusted on this device. Trust the certificate or use HTTP for local testing.';
case DioExceptionType.receiveTimeout:
return 'The agent${origin == null ? '' : ' at $origin'} took too long to respond. '
'Check that it is still running and try again.';
case DioExceptionType.sendTimeout:
return 'Sending the request to the agent${origin == null ? '' : ' at $origin'} took too long. '
'Check the connection and try again.';
case DioExceptionType.badResponse:
case DioExceptionType.cancel:
case DioExceptionType.unknown:
break;
}
}
return '$fallback $error';
}
String? _describeAgentOrigin(RequestOptions requestOptions) {
final uri = requestOptions.uri;
if (uri.hasScheme && uri.host.isNotEmpty) {
return uri.origin;
}
final baseUrl = requestOptions.baseUrl;
if (baseUrl.isEmpty) {
return null;
}
final parsed = Uri.tryParse(baseUrl);
if (parsed == null || !parsed.hasScheme || parsed.host.isEmpty) {
return null;
}
return parsed.origin;
}

7
apps/mobile_app/lib/features/projects/project_detail_page.dart
View File

@ -257,7 +257,12 @@ class _ProjectDetailPageState extends ConsumerState<ProjectDetailPage> {
return Center(
child: Padding(
padding: const EdgeInsets.all(24),
child: Text('Failed to load project: ${snapshot.error}'),
child: Text(
formatAgentError(
snapshot.error!,
fallback: 'Failed to load project.',
),
),
),
);
}

88
apps/mobile_app/lib/features/terminal/terminal_session_coordinator.dart
View File

@ -47,6 +47,7 @@ class TerminalSessionCoordinator extends ChangeNotifier {
);
static const Duration reconnectDelay = Duration(seconds: 1);
static const int initialHistoryLineCount = 200;
static const int pendingInputCharacterLimit = 2048;
final TerminalInteractionController controller;
final AgentApiClient apiClient;
@ -64,7 +65,11 @@ class TerminalSessionCoordinator extends ChangeNotifier {
int _historyLineCount = initialHistoryLineCount;
bool _isLoadingOlderHistory = false;
bool _isDisposed = false;
bool _connectionAttemptInProgress = false;
bool _reconnectPending = false;
String _connectionStatus = 'Connecting...';
final List<String> _pendingInputs = <String>[];
int _pendingInputCharacterCount = 0;
bool get isLoadingOlderHistory => _isLoadingOlderHistory;
@ -72,6 +77,7 @@ class TerminalSessionCoordinator extends ChangeNotifier {
Future<void> start({bool isReconnect = false}) async {
_cancelPendingReconnect();
_reconnectPending = false;
if (_isDisposed) {
return;
@ -100,6 +106,7 @@ class TerminalSessionCoordinator extends ChangeNotifier {
final socketSession = sessionFactory(baseUri: baseUri, session: session);
_socketSession = socketSession;
_connectionAttemptInProgress = true;
try {
await socketSession.connect(
@ -123,6 +130,7 @@ class TerminalSessionCoordinator extends ChangeNotifier {
'socket.resize.send',
'${viewport.columns}x${viewport.rows}',
);
_flushPendingInputs(socketSession);
controller.markConnected();
_connectionStatus = 'Attached to ${session.name}';
diagnosticLog?.add('socket.attach.ack', session.sessionId);
@ -137,6 +145,8 @@ class TerminalSessionCoordinator extends ChangeNotifier {
diagnosticLog?.add('socket.connect.error', '$error');
notifyListeners();
_scheduleReconnect();
} finally {
_connectionAttemptInProgress = false;
}
}
@ -148,6 +158,15 @@ class TerminalSessionCoordinator extends ChangeNotifier {
void sendInput(String input) {
final socketSession = _socketSession;
if (socketSession == null) {
if (_shouldBufferInput(input)) {
_bufferInput(input);
diagnosticLog?.add(
'socket.input.buffer',
'reason=no-session input=${_formatInputForDiagnostics(input)}',
);
return;
}
diagnosticLog?.add(
'socket.input.skip',
'reason=no-session input=${_formatInputForDiagnostics(input)}',
@ -163,10 +182,18 @@ class TerminalSessionCoordinator extends ChangeNotifier {
_formatInputForDiagnostics(input),
);
case TerminalSocketDispatchResult.noTransport:
diagnosticLog?.add(
'socket.input.skip',
'reason=no-transport input=${_formatInputForDiagnostics(input)}',
);
if (_shouldBufferInput(input)) {
_bufferInput(input);
diagnosticLog?.add(
'socket.input.buffer',
'reason=no-transport input=${_formatInputForDiagnostics(input)}',
);
} else {
diagnosticLog?.add(
'socket.input.skip',
'reason=no-transport input=${_formatInputForDiagnostics(input)}',
);
}
case TerminalSocketDispatchResult.emptyInput:
diagnosticLog?.add('socket.input.skip', 'reason=empty-input');
}
@ -212,6 +239,8 @@ class TerminalSessionCoordinator extends ChangeNotifier {
Future<void> close() async {
_isDisposed = true;
_cancelPendingReconnect();
_pendingInputs.clear();
_pendingInputCharacterCount = 0;
await _closeActiveSession();
}
@ -245,6 +274,7 @@ class TerminalSessionCoordinator extends ChangeNotifier {
void _scheduleReconnect() {
_cancelPendingReconnect();
_reconnectPending = true;
controller.markReconnecting();
_connectionStatus = 'Connection lost. Reconnecting...';
diagnosticLog?.add('socket.disconnect', session.sessionId);
@ -261,6 +291,7 @@ class TerminalSessionCoordinator extends ChangeNotifier {
void _cancelPendingReconnect() {
_cancelReconnect?.call();
_cancelReconnect = null;
_reconnectPending = false;
}
void _disposeActiveSessionInBackground() {
@ -292,4 +323,53 @@ class TerminalSessionCoordinator extends ChangeNotifier {
static String _formatInputForDiagnostics(String input) {
return input.replaceAll('\r', r'\r').replaceAll('\n', r'\n');
}
bool _shouldBufferInput(String input) {
if (_isDisposed || input.isEmpty) {
return false;
}
return _connectionAttemptInProgress || _reconnectPending;
}
void _bufferInput(String input) {
if (input.isEmpty) {
return;
}
_pendingInputs.add(input);
_pendingInputCharacterCount += input.length;
while (_pendingInputCharacterCount > pendingInputCharacterLimit &&
_pendingInputs.isNotEmpty) {
final removed = _pendingInputs.removeAt(0);
_pendingInputCharacterCount -= removed.length;
}
}
void _flushPendingInputs(TerminalSocketSession socketSession) {
if (_pendingInputs.isEmpty) {
return;
}
final pendingInputs = List<String>.of(_pendingInputs);
_pendingInputs.clear();
_pendingInputCharacterCount = 0;
for (var index = 0; index < pendingInputs.length; index += 1) {
final input = pendingInputs[index];
final result = socketSession.sendInput(input);
if (result == TerminalSocketDispatchResult.sent) {
diagnosticLog?.add('socket.input.flush', _formatInputForDiagnostics(input));
continue;
}
if (result == TerminalSocketDispatchResult.noTransport) {
for (final remainingInput in pendingInputs.skip(index)) {
_bufferInput(remainingInput);
}
}
break;
}
}
}

47
apps/mobile_app/lib/features/terminal/terminal_socket_session.dart
View File

@ -85,11 +85,20 @@ class TerminalSocketSession {
onFrame(message);
},
onError: (error, stackTrace) {
final wasAttached = _isAttached;
_handleTransportClosed(transport);
if (!attachedCompleter.isCompleted) {
attachedCompleter.completeError(error, stackTrace);
return;
}
if (wasAttached) {
onDisconnected?.call();
}
},
onDone: () {
final wasAttached = _isAttached;
_handleTransportClosed(transport);
if (!attachedCompleter.isCompleted) {
attachedCompleter.completeError(
StateError('Terminal socket closed before attach acknowledgement.'),
@ -97,7 +106,9 @@ class TerminalSocketSession {
return;
}
onDisconnected?.call();
if (wasAttached) {
onDisconnected?.call();
}
},
);
@ -121,8 +132,13 @@ class TerminalSocketSession {
return TerminalSocketDispatchResult.noTransport;
}
transport.send(jsonEncode(socketClient.buildInputMessage(input)));
return TerminalSocketDispatchResult.sent;
try {
transport.send(jsonEncode(socketClient.buildInputMessage(input)));
return TerminalSocketDispatchResult.sent;
} catch (_) {
_handleTransportClosed(transport);
return TerminalSocketDispatchResult.noTransport;
}
}
void sendResize(int columns, int rows) {
@ -131,15 +147,17 @@ class TerminalSocketSession {
return;
}
transport.send(jsonEncode(socketClient.buildResizeMessage(columns, rows)));
try {
transport.send(jsonEncode(socketClient.buildResizeMessage(columns, rows)));
} catch (_) {
_handleTransportClosed(transport);
}
}
Future<void> dispose() async {
final subscription = _subscription;
final transport = _transport;
_subscription = null;
_transport = null;
_isAttached = false;
_handleTransportClosed(transport);
await subscription?.cancel();
try {
await transport?.close();
@ -156,6 +174,21 @@ class TerminalSocketSession {
return false;
}
void _handleTransportClosed(TerminalSocketTransport? transport) {
if (transport == null) {
_subscription = null;
_transport = null;
_isAttached = false;
return;
}
if (identical(_transport, transport)) {
_subscription = null;
_transport = null;
_isAttached = false;
}
}
}
enum TerminalSocketDispatchResult { sent, noTransport, emptyInput }

12
apps/mobile_app/test/core/network/agent_api_client_test.dart
View File

@ -142,6 +142,18 @@ void main() {
expect(history['sessionId'], 'abc');
expect(history['hasMoreAbove'], isTrue);
});
test('applies explicit default request timeouts', () async {
final adapter = _FakeHttpClientAdapter(jsonEncode(const <dynamic>[]));
final dio = Dio()..httpClientAdapter = adapter;
final client = AgentApiClient(Uri.parse('https://host:9443'), dio: dio);
await client.listSessions();
expect(adapter.lastOptions?.connectTimeout, const Duration(seconds: 8));
expect(adapter.lastOptions?.sendTimeout, const Duration(seconds: 10));
expect(adapter.lastOptions?.receiveTimeout, const Duration(seconds: 20));
});
}
class _FakeHttpClientAdapter implements HttpClientAdapter {

48
apps/mobile_app/test/core/network/agent_error_formatter_test.dart Normal file
View File

@ -0,0 +1,48 @@
import 'dart:io';
import 'package:dio/dio.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:term_remote_ctl/core/network/agent_error_formatter.dart';
void main() {
test(
'formats connection timeout with zero duration as a reachability hint',
() {
final error = DioException.connectionTimeout(
timeout: Duration.zero,
requestOptions: RequestOptions(
path: '/api/projects/project-1',
baseUrl: 'http://100.81.30.82:5067',
),
error: const SocketException(
'Operation timed out',
osError: OSError('Operation timed out', 60),
port: 5067,
),
);
final message = formatAgentError(
error,
fallback: 'Failed to load project.',
);
expect(message, contains('Cannot reach the agent'));
expect(message, contains('http://100.81.30.82:5067'));
expect(message, isNot(contains('0:00:00')));
},
);
test('formats certificate failures into trust guidance', () {
final error = DioException.badCertificate(
requestOptions: RequestOptions(
path: '/api/projects',
baseUrl: 'https://host.example:9443',
),
);
final message = formatAgentError(error, fallback: 'Failed to load project.');
expect(message, contains('certificate'));
expect(message, contains('https://host.example:9443'));
});
}

50
apps/mobile_app/test/features/terminal/terminal_session_coordinator_test.dart
View File

@ -83,6 +83,43 @@ void main() {
},
);
test(
'input typed while reconnect is pending is flushed after the next attach',
() async {
final controller = TerminalInteractionController();
final apiClient = _FakeAgentApiClient();
final sessionFactory = _FakeTerminalSessionFactory();
final reconnectScheduler = _FakeReconnectScheduler();
final session = Session(
sessionId: 'abc',
name: 'codex-main',
status: 'idle',
);
final coordinator = TerminalSessionCoordinator(
controller: controller,
apiClient: apiClient,
session: session,
sessionFactory: sessionFactory.create,
onFrame: (_) {},
viewportProvider: () => const TerminalViewport(columns: 80, rows: 24),
reconnectScheduler: reconnectScheduler.schedule,
);
await coordinator.start();
final firstSession = sessionFactory.createdSessions.single;
firstSession.disconnect();
coordinator.sendInput('dir\r');
expect(firstSession.sentInputs, isEmpty);
await reconnectScheduler.runPending();
expect(sessionFactory.createdSessions, hasLength(2));
expect(sessionFactory.createdSessions.last.sentInputs, ['dir\r']);
},
);
test(
'loadOlderHistory increases the requested history window size',
() async {
@ -251,10 +288,12 @@ class _FakeTerminalSocketSession extends TerminalSocketSession {
final bool autoConnect;
final resizeCalls = <List<int>>[];
final sentInputs = <String>[];
int disposeCount = 0;
Completer<void> _connectCompleter = Completer<void>();
void Function(String frame)? _onFrame;
void Function()? _onDisconnected;
bool _isDisconnected = false;
@override
Future<void> connect({
@ -274,6 +313,16 @@ class _FakeTerminalSocketSession extends TerminalSocketSession {
resizeCalls.add([columns, rows]);
}
@override
TerminalSocketDispatchResult sendInput(String input) {
if (_isDisconnected || !_connectCompleter.isCompleted) {
return TerminalSocketDispatchResult.noTransport;
}
sentInputs.add(input);
return TerminalSocketDispatchResult.sent;
}
void completeConnect() {
if (!_connectCompleter.isCompleted) {
_connectCompleter.complete();
@ -285,6 +334,7 @@ class _FakeTerminalSocketSession extends TerminalSocketSession {
}
void disconnect() {
_isDisconnected = true;
_onDisconnected?.call();
}

27
apps/mobile_app/test/features/terminal/terminal_socket_session_test.dart
View File

@ -123,22 +123,49 @@ void main() {
expect(disconnectCount, 1);
});
test('sendInput reports noTransport after the socket closes', () async {
final transport = _FakeTerminalSocketTransport();
final session = TerminalSocketSession(
sessionId: 'session-123',
socketClient: AgentSocketClient(Uri.parse('https://host:9443')),
transportFactory: (_) => transport,
);
final connectFuture = session.connect(onFrame: (_) {});
await Future<void>.delayed(Duration.zero);
transport.emit('{"type":"attached","sessionId":"session-123"}');
await connectFuture;
await transport.close();
await Future<void>.delayed(Duration.zero);
expect(
session.sendInput('dir\r'),
TerminalSocketDispatchResult.noTransport,
);
});
}
class _FakeTerminalSocketTransport implements TerminalSocketTransport {
final _incoming = StreamController<dynamic>.broadcast();
final sentMessages = <String>[];
var _isClosed = false;
@override
Stream<dynamic> get stream => _incoming.stream;
@override
void send(String message) {
if (_isClosed) {
throw StateError('transport is closed');
}
sentMessages.add(message);
}
@override
Future<void> close() async {
_isClosed = true;
await _incoming.close();
}

55
apps/mobile_app/test/widget_test.dart
View File

@ -1,3 +1,5 @@
import 'dart:io';
import 'dart:async';
import 'package:dio/dio.dart';
@ -971,6 +973,39 @@ void main() {
},
);
testWidgets(
'project detail formats agent connection errors instead of dumping Dio text',
(tester) async {
final project = Project(
projectId: 'project-1',
name: 'codex-main',
workingDirectory: r'C:\repo\codex-main',
createdAtUtc: DateTime.parse('2026-03-30T10:00:00Z'),
updatedAtUtc: DateTime.parse('2026-03-30T10:00:00Z'),
);
await tester.pumpWidget(
ProviderScope(
overrides: [
agentApiClientProvider.overrideWithValue(_FakeAgentApiClient()),
projectRepositoryProvider.overrideWithValue(
_FailingProjectRepository(),
),
sessionRepositoryProvider.overrideWithValue(
_FakeSessionRepository(),
),
],
child: MaterialApp(home: ProjectDetailPage(project: project)),
),
);
await tester.pumpAndSettle();
expect(find.textContaining('Cannot reach the agent'), findsOneWidget);
expect(find.textContaining('0:00:00'), findsNothing);
expect(find.textContaining('DioException'), findsNothing);
},
);
testWidgets('session list deletes a session after confirmation', (
tester,
) async {
@ -1251,6 +1286,26 @@ class _FailingSessionRepository extends SessionRepository {
}
}
class _FailingProjectRepository extends ProjectRepository {
_FailingProjectRepository() : super(_FakeAgentApiClient());
@override
Future<ProjectDetail> getProjectDetail(String projectId) async {
throw DioException.connectionTimeout(
timeout: Duration.zero,
requestOptions: RequestOptions(
path: '/api/projects/$projectId',
baseUrl: 'http://100.81.30.82:5067',
),
error: SocketException(
'Operation timed out',
osError: OSError('Operation timed out', 60),
port: 5067,
),
);
}
}
class _FakeAgentApiClient extends AgentApiClient {
_FakeAgentApiClient() : super(Uri.parse('http://100.81.30.82:5067'));

5
apps/windows_agent/src/TermRemoteCtl.Agent/Realtime/TerminalWebSocketHandler.cs
View File

@ -73,12 +73,11 @@ public static class TerminalWebSocketHandler
}
}
host.OutputReceived += HandleOutput;
try
{
await SendJsonAsync(socket, new TerminalAttachResponse(sessionId), sendGate, context.RequestAborted).ConfigureAwait(false);
var replay = registry.GetReplaySnapshot(sessionId);
host.OutputReceived += HandleOutput;
await SendJsonAsync(socket, new TerminalAttachResponse(sessionId), sendGate, context.RequestAborted).ConfigureAwait(false);
if (!string.IsNullOrEmpty(replay))
{
await SendTextAsync(socket, replay, sendGate, context.RequestAborted).ConfigureAwait(false);

91
apps/windows_agent/tests/TermRemoteCtl.Agent.IntegrationTests/Realtime/TerminalWebSocketHandlerTests.cs
View File

@ -73,6 +73,37 @@ public sealed class TerminalWebSocketHandlerTests
Assert.Equal("prompt> dir\r\nnext> ", replayFrame);
}
[Fact]
public async Task Attach_Does_Not_Duplicate_Output_Produced_During_Replay_Boundary()
{
await using var fixture = new TerminalApiFixture();
var registry = fixture.Services.GetRequiredService<SessionRegistry>();
fixture.TerminalHost.Registry = registry;
var session = registry.Create("Shell", DateTimeOffset.UtcNow);
await registry.AppendOutputAsync(session.SessionId, "prompt> dir\r\n", CancellationToken.None);
fixture.TerminalHost.EmitOutputOnNextSubscription(session.SessionId, "next> ");
using WebSocket socket = await fixture.Server.CreateWebSocketClient().ConnectAsync(
new Uri($"ws://localhost/ws/terminal?sessionId={session.SessionId}"),
CancellationToken.None);
var attachedFrame = await ReceiveTextAsync(socket, CancellationToken.None);
var attachedPayload = JsonSerializer.Deserialize<TerminalAttachResponse>(
attachedFrame,
new JsonSerializerOptions(JsonSerializerDefaults.Web));
Assert.NotNull(attachedPayload);
Assert.Equal("attached", attachedPayload!.Type);
var replayFrame = await ReceiveTextAsync(socket, CancellationToken.None);
Assert.Equal("prompt> dir\r\n", replayFrame);
var liveFrame = await ReceiveTextAsync(socket, CancellationToken.None);
Assert.Equal("next> ", liveFrame);
await AssertNoAdditionalTextFrameAsync(socket, TimeSpan.FromMilliseconds(200));
}
private static async Task<string> ReceiveTextAsync(WebSocket socket, CancellationToken cancellationToken)
{
var buffer = new byte[4096];
@ -110,12 +141,24 @@ public sealed class TerminalWebSocketHandlerTests
throw new TimeoutException("Condition was not met.");
}
private static async Task AssertNoAdditionalTextFrameAsync(WebSocket socket, TimeSpan timeout)
{
using var cts = new CancellationTokenSource(timeout);
await Assert.ThrowsAnyAsync<OperationCanceledException>(
async () => await ReceiveTextAsync(socket, cts.Token));
}
private sealed class TerminalApiFixture : WebApplicationFactory<Program>
{
private readonly string _dataRoot = Path.Combine(Path.GetTempPath(), "TermRemoteCtl.Tests", Guid.NewGuid().ToString("N"));
private readonly TestTerminalSessionHost _terminalHost = new();
private readonly TestTerminalSessionHost _terminalHost;
private readonly RecordingTerminalDiagnosticsSink _diagnostics = new();
public TerminalApiFixture()
{
_terminalHost = new TestTerminalSessionHost();
}
public TestTerminalSessionHost TerminalHost => _terminalHost;
public RecordingTerminalDiagnosticsSink Diagnostics => _diagnostics;
@ -137,7 +180,8 @@ public sealed class TerminalWebSocketHandlerTests
builder.ConfigureServices(services =>
{
services.RemoveAll<ISessionHost>();
services.AddSingleton<ISessionHost>(_terminalHost);
services.AddSingleton(_terminalHost);
services.AddSingleton<ISessionHost>(sp => sp.GetRequiredService<TestTerminalSessionHost>());
services.AddSingleton<ITerminalDiagnosticsSink>(_diagnostics);
});
}
@ -167,8 +211,38 @@ public sealed class TerminalWebSocketHandlerTests
private sealed class TestTerminalSessionHost : ISessionHost
{
private readonly List<(string Kind, string SessionId, string Value)> _inputs = new();
private EventHandler<TerminalOutputEventArgs>? _outputReceived;
private readonly object _gate = new();
private (string SessionId, string Chunk)? _pendingSubscriptionEmission;
public event EventHandler<TerminalOutputEventArgs>? OutputReceived;
public event EventHandler<TerminalOutputEventArgs>? OutputReceived
{
add
{
(string SessionId, string Chunk)? emission;
lock (_gate)
{
_outputReceived += value;
emission = _pendingSubscriptionEmission;
_pendingSubscriptionEmission = null;
}
if (emission is { } pending)
{
EmitOutput(pending.SessionId, pending.Chunk);
}
}
remove
{
lock (_gate)
{
_outputReceived -= value;
}
}
}
public SessionRegistry? Registry { get; set; }
public IReadOnlyList<(string Kind, string SessionId, string Value)> Inputs => _inputs;
@ -194,9 +268,18 @@ public sealed class TerminalWebSocketHandlerTests
return Task.CompletedTask;
}
public void EmitOutputOnNextSubscription(string sessionId, string chunk)
{
lock (_gate)
{
_pendingSubscriptionEmission = (sessionId, chunk);
}
}
public void EmitOutput(string sessionId, string chunk)
{
OutputReceived?.Invoke(this, new TerminalOutputEventArgs(sessionId, chunk));
Registry?.AppendOutputAsync(sessionId, chunk, CancellationToken.None).GetAwaiter().GetResult();
_outputReceived?.Invoke(this, new TerminalOutputEventArgs(sessionId, chunk));
}
}