private async Task InitializeMonitoring(CancellationToken cancellationToken)
{
await this.monitorCreationTask.Task;
this.state = GatewayState.Initializing;
try
{
ServiceEventSource.Current.ServiceMessage(this.Context, "Initializing monitoring {0}", this.myInfo.Id.InstanceId);
await gatewayMonitor_.InitializeAsync(
this.myInfo,
this.heartbeatInterval,
cancellationToken);
ServiceEventSource.Current.ServiceMessage(this.Context, "Monitoring initialized");
this.state = GatewayState.Monitored;
}
catch (Exception e)
{
ServiceEventSource.Current.ServiceMessage(this.Context, "Failed to initialize monitoring - {0}", e.ToString());
this.state = GatewayState.Failed;
this.OnMonitoringFailed();
throw e;
}
}
/// <summary>
/// Warning: Do not call from the context of the connect loop! A deadlock will occur!
/// </summary>
async Task FullDisconnect()
{
log.LogVerbose("Disconnecting...");
state = GatewayState.Disconnected;
handshakeCompleteCancellationSource.Cancel();
if (connectTask != null)
{
// Cancel any automatic reconnection
connectTaskCancellationSource?.Cancel();
// Wait for the automatic reconnection to end
try
{
await connectTask.ConfigureAwait(false);
}
catch (OperationCanceledException) { /* Expected to happen. */ }
catch (Exception ex)
{
// Should never happen, but there isn't anything we can do here.
log.LogError($"[DisconnectAsync] Uncaught exception found in connect task: {ex}");
}
}
// Disconnect the socket if needed
if (socket.CanBeDisconnected)
{
await socket.DisconnectAsync(WebSocketCloseStatus.NormalClosure, "Disconnecting...", CancellationToken.None)
.ConfigureAwait(false);
}
log.LogVerbose("Disconnected.");
}
private void SetGatewayState(GatewayState newState)
{
switch (newState)
{
case GatewayState.Disconnected:
LogInfo("Disconnected.");
break;
case GatewayState.ConnectingToPort:
LogInfo("Trying to connect...");
break;
case GatewayState.ConnectingToGateway:
LogInfo("Trying to communicate...");
break;
case GatewayState.Connected:
LogInfo("Gateway connected.");
break;
}
if (gatewayState == GatewayState.Connected && newState != GatewayState.Connected)
{
OnDisconnected?.Invoke();
}
else if (gatewayState != GatewayState.Connected && newState == GatewayState.Connected)
{
OnConnected?.Invoke();
}
gatewayState = newState;
OnGatewayStateChanged?.Invoke(gatewayState);
}
private async Task SendHeartbeatAsync(CancellationToken cancellationToken)
{
ServiceEventSource.Current.ServiceMessage(this.Context, "Sending heartbeat");
try
{
var cts = CancellationTokenSource.CreateLinkedTokenSource(
cancellationToken,
new CancellationTokenSource(heartbeatInterval).Token);
var gatewayMonitor = ServiceProxy.Create <IGatewayMonitor>(
this.monitorServiceAddress,
this.monitorServicePartitionKey);
await gatewayMonitor.HeartbeatAsync(this.myInfo.Id, cts.Token);
ServiceEventSource.Current.ServiceMessage(this.Context, "Heartbeat sent");
}
catch (Exception e)
{
ServiceEventSource.Current.ServiceMessage(this.Context, "Failed to send heartbeat - {0}", e.ToString());
this.state = GatewayState.Failed;
this.OnMonitoringFailed();
throw e;
}
}
private async Task InitializeMonitoring(CancellationToken cancellationToken)
{
this.state = GatewayState.Initializing;
try
{
ServiceEventSource.Current.ServiceMessage(this.Context, "Initializing monitoring");
var gatewayMonitor = ServiceProxy.Create <IGatewayMonitor>(
this.monitorServiceAddress,
this.monitorServicePartitionKey);
await gatewayMonitor.InitializeAsync(
this.myInfo,
this.heartbeatInterval,
cancellationToken);
ServiceEventSource.Current.ServiceMessage(this.Context, "Monitoring initialized");
this.state = GatewayState.Monitored;
}
catch (Exception e)
{
ServiceEventSource.Current.ServiceMessage(this.Context, "Failed to initialize monitoring - {0}", e.ToString());
this.state = GatewayState.Failed;
this.OnMonitoringFailed();
throw e;
}
}
void _OnClose(int code = 0)
{
this._CancelHeartBeat();
if (this.m_CloseRequired)
{
this.m_ReadyState = GatewayState.Init;
return;
}
if (this.m_Socket != null)
{
//https://github.com/sta/websocket-sharp/issues/219
if (code == 1015 && this.m_Socket.checkSslProtocolHackFlag())
{
this.m_SslHandShakeError = true;
}
this.m_Socket.Close();
this.m_Socket = null;
}
this._Reset(isInit: false);
bool reset = !this.resumable || this.m_BackOff.fail > 0;
if (code != 0)
{
this.m_CandidateIndex++;
}
var delay = this._OnFail(reset);
NetworkStatusManager.isConnected = false;
DebugerUtils.DebugAssert(false, $"connection failed, retry in {delay / 1000f} seconds");
}
public GatewayService(StatelessServiceContext context)
: base(context)
{
this.state = GatewayState.Created;
this.myInfo = CreateMyInfo(context);
this.heartbeatInterval = GetHeartbeatDuration(context.CodePackageActivationContext);
this.monitorServiceAddress = GetMonitorServiceAddress(context.CodePackageActivationContext);
this.monitorServicePartitionKey = new ServicePartitionKey(this.myInfo.Id.Name);
}
public GatewayStateFormalizer(GatewayState gatewayState)
{
this.id = gatewayState.Id;
this.stateName = gatewayState.StateName;
this.remark = gatewayState.Remark;
this.createTime = gatewayState.CreateTime
.ToString(ConstantService.DateTimeFormat);
this.updateTime = gatewayState.UpdateTime
.ToString(ConstantService.DateTimeFormat);
}
void _Reset(bool isInit, bool reset = true)
{
this.m_ReadyState = isInit ? GatewayState.Init : GatewayState.CLOSED;
this.m_PayloadQueue.Clear();
if (reset)
{
this.m_SessionId = null;
this.m_Sequence = 0;
}
}
public GatewayService(StatelessServiceContext context)
: base(context)
{
this.state = GatewayState.Created;
this.myInfo = CreateMyInfo(context);
serviceDownToken = new CancellationTokenSource();
this.heartbeatInterval = GetHeartbeatDuration(context.CodePackageActivationContext);
this.monitorServiceAddress = GetMonitorServiceAddress(context.CodePackageActivationContext);
this.monitorServicePartitionKey = new ServicePartitionKey(this.myInfo.Id.Name);
this.monitorCreationTask = new TaskCompletionSource <bool>();
}
private void Socket_OnFatalDisconnection(object sender, GatewayCloseCode e)
{
if (isDisposed)
{
return;
}
log.LogVerbose("Fatal disconnection occured, setting state to Disconnected.");
state = GatewayState.Disconnected;
(string message, ShardFailureReason reason) = GatewayCloseCodeToReason(e);
gatewayFailureData = new GatewayFailureData(message, reason, null);
handshakeCompleteEvent.Set();
OnFailure?.Invoke(this, gatewayFailureData);
}
public async void Execute(Gateway gateway)
{
// 通信実装を毎フレーム呼び出し
switch (State)
{
case GatewayState.GETTING_DREAMS_LIST:
_existsFiles = FilerOperator.getExistsTextures();
_dream = await gateway.GetDreamsData();
if (_dream != null)
{
State = GatewayState.GETTING_DREAM_TEXTURE_INIT;
}
break;
case GatewayState.GETTING_DREAM_TEXTURE_INIT:
_image = _dream.images[_counter];
// 既にローカルにテクスチャが存在する場合はスキップ
if (_existsFiles != null && _existsFiles.Contains(_image))
{
State = GatewayState.GETTING_DREAM_TEXTURE_FINISHED;
break;
}
//gateway.SetUrlFromFileName(_image);
//State = gateway.GetDreamTexture(_image);
break;
case GatewayState.GETTING_DREAM_TEXTURE:
//State = gateway.GetDreamTexture(_image);
break;
case GatewayState.GETTING_DREAM_TEXTURE_FINISHED:
_counter++;
if (_counter < _dream.images.Length)
{
State = GatewayState.GETTING_DREAM_TEXTURE_INIT;
}
else
{
State = GatewayState.GETTING_DREAM_TEXTURES_COMPLETED;
}
break;
case GatewayState.GETTING_DREAM_TEXTURES_COMPLETED:
break;
}
}
internal Gateway(string botToken, Shard shard, int totalShards)
{
this.botToken = botToken;
this.shard = shard;
this.totalShards = totalShards;
http = new DiscordHttpClient(botToken);
cache = shard.Cache;
log = new DiscoreLogger($"Gateway#{shard.Id}");
state = GatewayState.Disconnected;
handshakeCompleteEvent = new AsyncManualResetEvent();
handshakeCompleteCancellationSource = new CancellationTokenSource();
// Up-to-date rate limit parameters: https://discord.com/developers/docs/topics/gateway#rate-limiting
identifyRateLimiter = new GatewayRateLimiter(5, 1); // 1 IDENTIFY per 5 seconds
outboundPayloadRateLimiter = new GatewayRateLimiter(60, 120); // 120 outbound payloads every 60 seconds
gameStatusUpdateRateLimiter = new GatewayRateLimiter(60, 5); // 5 status updates per minute
InitializeDispatchHandlers();
}
public override async Task StartAsync(CancellationToken cancellationToken)
{
_logger.LogInformation("Started Discord Service");
_logger.LogDebug("Mod role: {ModRole}", _settings.Value.ModRole);
_webSocket = new ClientWebSocket();
var url = (await _restApi.GetAsync <GetGatewayResponse>("/gateway", cancellationToken))?.Url ?? string.Empty;
if (string.IsNullOrWhiteSpace(url))
{
_logger.LogError("Unable to get Gateway URL");
return;
}
_logger.LogDebug("Got Gateway Url '{Url}'", url);
_state = GatewayState.Connecting;
_webSocket = new ClientWebSocket();
await _webSocket.ConnectAsync(new Uri($"{url}?v=9&encoding=json"), cancellationToken);
await base.StartAsync(cancellationToken);
}
private void SetGatewayState(GatewayState newState)
{
switch (newState)
{
case GatewayState.Disconnected:
LogInfo("Disconnected.");
break;
case GatewayState.ConnectingToPort:
LogInfo("Trying to connect...");
break;
case GatewayState.ConnectingToGateway:
LogInfo("Trying to communicate...");
break;
case GatewayState.Connected:
LogInfo("Gateway connected.");
break;
}
if (gatewayState == GatewayState.Connected && newState != GatewayState.Connected)
OnDisconnected?.Invoke();
else if (gatewayState != GatewayState.Connected && newState == GatewayState.Connected)
OnConnected?.Invoke();
gatewayState = newState;
OnGatewayStateChanged?.Invoke(gatewayState);
}
/// <exception cref="OperationCanceledException"></exception>
async Task ConnectLoop(bool resume, CancellationToken cancellationToken)
{
// Keep track of whether this is a resume or new session so
// we can respond to the HELLO payload appropriately.
isConnectionResuming = resume;
log.LogVerbose($"[ConnectLoop] resume = {resume}");
handshakeCompleteEvent.Reset();
handshakeCompleteCancellationSource = new CancellationTokenSource();
while (!cancellationToken.IsCancellationRequested)
{
// Ensure previous socket has been closed
if (socket != null)
{
UnsubscribeSocketEvents();
if (resume)
{
// Store previous sequence
lastSequence = socket.Sequence;
}
if (socket.CanBeDisconnected)
{
log.LogVerbose("[ConnectLoop] Disconnecting previous socket...");
// If for some reason the socket cannot be disconnected gracefully,
// DisconnectAsync will abort the socket after 5s.
if (resume)
{
// Make sure to disconnect with a non 1000 code to ensure Discord doesn't
// force us to make a new session since we are resuming.
await socket.DisconnectAsync(WebSocketCloseStatus.EndpointUnavailable,
"Reconnecting to resume...", cancellationToken).ConfigureAwait(false);
}
else
{
await socket.DisconnectAsync(WebSocketCloseStatus.NormalClosure,
"Starting new session...", cancellationToken).ConfigureAwait(false);
}
}
socket.Dispose();
}
if (!resume)
{
// If not resuming, reset gateway session state.
lastSequence = 0;
}
// Create a new socket
socket = new GatewaySocket($"GatewaySocket#{shard.Id}", lastSequence,
outboundPayloadRateLimiter, gameStatusUpdateRateLimiter, identifyRateLimiter);
socket.OnHello = async() =>
{
if (isDisposed)
{
return;
}
if (isConnectionResuming)
{
// Resume
await socket.SendResumePayload(botToken, sessionId, lastSequence);
}
else
{
// Identify
await socket.SendIdentifyPayload(botToken, lastShardStartConfig.GatewayLargeThreshold,
shard.Id, totalShards);
}
};
SubscribeSocketEvents();
// Get the gateway URL if we don't have one
string gatewayUrl = GatewayUrlMemoryCache.GatewayUrl;
if (gatewayUrl == null)
{
try
{
log.LogVerbose("[ConnectLoop] Retrieving Gateway URL...");
gatewayUrl = await http.GetGateway().ConfigureAwait(false);
GatewayUrlMemoryCache.UpdateUrl(gatewayUrl);
}
catch (Exception ex) when(ex is DiscordHttpApiException || ex is HttpRequestException || ex is OperationCanceledException)
{
log.LogError($"[ConnectLoop:GetGateway] {ex}");
log.LogError("[ConnectLoop] No gateway URL to connect with, trying again in 10s...");
await Task.Delay(10 * 1000, cancellationToken).ConfigureAwait(false);
continue;
}
catch (Exception ex)
{
// This should never-ever happen, but we need to handle it just in-case.
log.LogError(ex);
log.LogError("[ConnectLoop] Uncaught severe error occured while getting the Gateway URL, setting state to Disconnected.");
state = GatewayState.Disconnected;
gatewayFailureData = new GatewayFailureData(
"Failed to retrieve the Gateway URL because of an unknown error.",
ShardFailureReason.Unknown, ex);
handshakeCompleteEvent.Set();
OnFailure?.Invoke(this, gatewayFailureData);
break;
}
}
log.LogVerbose($"[ConnectLoop] gatewayUrl = {gatewayUrl}");
// Wait if necessary
if (nextConnectionDelayMs > 0)
{
log.LogVerbose($"[ConnectLoop] Waiting {nextConnectionDelayMs}ms before connecting socket...");
await Task.Delay(nextConnectionDelayMs, cancellationToken).ConfigureAwait(false);
nextConnectionDelayMs = 0;
}
try
{
// Attempt to connect
await socket.ConnectAsync(new Uri($"{gatewayUrl}?v={GATEWAY_VERSION}&encoding=json"), cancellationToken)
.ConfigureAwait(false);
// At this point the socket has successfully connected
log.LogVerbose("[ConnectLoop] Socket connected successfully.");
break;
}
catch (WebSocketException wsex)
{
UnsubscribeSocketEvents();
// Failed to connect
log.LogError("[ConnectLoop] Failed to connect: " +
$"{wsex.WebSocketErrorCode} ({(int)wsex.WebSocketErrorCode}), {wsex.Message}");
// Invalidate the cached URL since we failed to connect the socket
log.LogVerbose("[ConnectLoop] Invalidating Gateway URL...");
GatewayUrlMemoryCache.InvalidateUrl();
// Wait 5s then retry
log.LogVerbose("[ConnectLoop] Waiting 5s before retrying...");
await Task.Delay(5000, cancellationToken).ConfigureAwait(false);
}
}
// If the token is cancelled between the socket successfully connecting and the loop exiting,
// do not throw an exception because the connection did technically complete before the cancel.
if (socket == null || !socket.IsConnected)
{
// If the loop stopped from the token being cancelled, ensure an exception is still thrown.
cancellationToken.ThrowIfCancellationRequested();
}
// If this is an automatic reconnection, fire OnReconnected event
if (state == GatewayState.Connected)
{
if (resume)
{
log.LogInfo("[ConnectLoop:Reconnection] Successfully started a resume.");
}
else
{
log.LogInfo("[ConnectLoop:Reconnection] Successfully started creating a new session.");
}
OnReconnected?.Invoke(this, new GatewayReconnectedEventArgs(!resume));
}
}
public void Connect(Action <string> onIdentify, Action <string, SocketResponseDataBase> onMessage,
bool reconnect = false)
{
if (this.m_ReadyState != GatewayState.CLOSED && this.m_ReadyState != GatewayState.Init)
{
return;
}
if (!reconnect)
{
this.m_OnIdentify = onIdentify;
this.m_OnMessage = onMessage;
this.m_CloseRequired = false;
}
else
{
DebugerUtils.DebugAssert(this.m_OnIdentify != null, "fatal error: reconnect before initial connect !");
DebugerUtils.DebugAssert(this.m_OnMessage != null, "fatal error: reconnect before initial connect !");
}
this.m_ReadyState = GatewayState.CONNECTING;
this.m_BackOff.Cancel();
this._SelectGateway(
createWebSocketFunc:
url => {
if (url != null)
{
this._Reset(isInit: true);
this.m_Socket?.Close();
this.m_Socket = null;
this.m_Socket = new WebSocket(this.m_Host, this.m_SslHandShakeError);
this.m_Socket.Connect(url,
OnError: msg => { this._OnClose(1); },
OnClose: this._OnClose,
OnConnected: () => {
NetworkStatusManager.isConnected = true;
DebugerUtils.DebugAssert(this.m_CommitId != null,
"fatal error: commit Id is not correctly set before connection!");
this.m_ReadyState = GatewayState.OPEN;
if (!this._Resume())
{
this.m_OnIdentify.Invoke(this.m_CommitId);
}
this._StartHeartBeat();
},
OnMessage: bytes => {
NetworkStatusManager.isConnected = true;
string type = "";
var data = this._OnMessage(bytes, ref type);
if (data != null)
{
this.m_OnMessage?.Invoke(type, data);
}
}
);
}
else
{
NetworkStatusManager.isConnected = false;
var delay = this._OnFail();
DebugerUtils.DebugAssert(false, $"gateway discovery failed, retry in {delay / 1000f} seconds");
}
});
}
/// <exception cref="GatewayHandshakeException"></exception>
/// <exception cref="InvalidOperationException"></exception>
/// <exception cref="ObjectDisposedException"></exception>
public async Task ConnectAsync(ShardStartConfig config, CancellationToken cancellationToken)
{
if (isDisposed)
{
throw new ObjectDisposedException(GetType().FullName);
}
if (state == GatewayState.Connected)
{
throw new InvalidOperationException("The gateway is already connected!");
}
if (state == GatewayState.Connecting)
{
throw new InvalidOperationException("The gateway is already connecting!");
}
// Begin connecting
state = GatewayState.Connecting;
lastShardStartConfig = config;
gatewayFailureData = null;
handshakeCompleteEvent.Reset();
connectTask = ConnectLoop(false, cancellationToken);
try
{
// Connect socket
await connectTask.ConfigureAwait(false);
try
{
// Wait for the handshake to complete
await handshakeCompleteEvent.WaitAsync(cancellationToken).ConfigureAwait(false);
}
catch (OperationCanceledException)
{
// Since this was cancelled after the socket connected,
// we need to do a full disconnect.
await FullDisconnect();
throw;
}
// Check for errors
if (gatewayFailureData != null)
{
throw new GatewayHandshakeException(gatewayFailureData);
}
// Connection successful
log.LogVerbose("[ConnectAsync] Setting state to Connected.");
state = GatewayState.Connected;
}
catch
{
// Reset to disconnected if cancelled or failed
log.LogVerbose("[ConnectAsync] Setting state to Disconnected.");
state = GatewayState.Disconnected;
throw;
}
}
private async Task HandlePacket(string json, CancellationToken cancellationToken)
{
var genericGateway = JsonSerializer.Deserialize <GatewayPacket <object> >(json, _jsonOptions);
if (genericGateway is null)
{
_logger.LogError("Unable to parse generic gateway packet");
return;
}
if (genericGateway.SequenceNumber is not null)
{
_lastSequenceNumber = genericGateway.SequenceNumber;
}
switch (_state)
{
case GatewayState.Connecting:
if (genericGateway.Opcode == Opcode.Hello)
{
// We got a Hello, start sending heartbeats!
var helloPacket = DeserializePacket <HelloData>(json);
if (helloPacket is null || helloPacket.Data is null)
{
_logger.LogError("Invalid hello packet");
return;
}
_heartbeatInterval = TimeSpan.FromMilliseconds(helloPacket.Data.HeartbeatInterval);
_logger.LogDebug("Heartbeat interval set to '{Interval}'", _heartbeatInterval);
if (_heartbeatTask is null)
{
_heartbeatTask = new BackgroundTask(SendHeartbeatAsync);
}
// Queue up an Identify packet
var identifyPacket = new GatewayPacket <IdentifyData>
{
Data = new IdentifyData
{
// TODO: Intents
Intents = 1,
Token = _settings.Value.Token,
Properties = new IdentifyDataProperties
{
Browser = "octantis",
Device = "octantis",
Os = "linux"
}
},
Opcode = Opcode.Identify
};
await TransmitGatewayAsync(identifyPacket, cancellationToken);
}
else if (genericGateway.Opcode == Opcode.Dispatch && genericGateway.EventName == Events.Ready)
{
var readyPacket = DeserializePacket <ReadyData>(json);
if (readyPacket is null || readyPacket.Data is null)
{
_logger.LogError("Invalid ready packet");
return;
}
ApplicationId = readyPacket.Data.User?.Id ?? 0;
_sessionId = readyPacket.Data.SessionId;
_logger.LogInformation("Connected to gateway v{Version}, application id '{Id}', session id '{Id}'", readyPacket.Data.GatewayVersion, ApplicationId, _sessionId);
foreach (var guild in readyPacket.Data.Guilds)
{
_logger.LogDebug("Guild '{Id}'", guild.Id);
}
// Got the ready event, move up to connected state!
_state = GatewayState.Connected;
}
else
{
_logger.LogWarning("Unhandled opcode '{Opcode}'", genericGateway.Opcode);
}
break;
case GatewayState.Connected:
{
// Handle events
if (genericGateway.Opcode == Opcode.Heartbeat)
{
// Force heartbeat send?
_logger.LogError("TODO: SEND HEARTBEAT");
}
else if (genericGateway.Opcode == Opcode.Dispatch)
{
// EVENTS :D
var type = Events.FromString(genericGateway.EventName !);
List <Registration>?registrationsForEvent;
lock (_registrations)
{
_registrations.TryGetValue(type, out registrationsForEvent);
}
if (registrationsForEvent is not null)
{
foreach (var registration in registrationsForEvent)
{
var packetType = typeof(GatewayPacket <>).MakeGenericType(registration.ArgumentType);
dynamic deserializedAsType = JsonSerializer.Deserialize(json, packetType, _jsonOptions) !;
registration.Action(deserializedAsType.Data);
}
}
else
{
_logger.LogWarning("Unhandled event type '{Type}'", type);
}
}
}
break;
}
}