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WebSocketClient.java
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WebSocketClient.java
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/*
* Copyright 2015-2018 Austin Keener & Michael Ritter & Florian Spieß
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.dv8tion.jda.core.requests;
import com.neovisionaries.ws.client.*;
import gnu.trove.iterator.TLongObjectIterator;
import gnu.trove.map.TLongObjectMap;
import net.dv8tion.jda.client.entities.impl.JDAClientImpl;
import net.dv8tion.jda.client.handle.*;
import net.dv8tion.jda.core.AccountType;
import net.dv8tion.jda.core.JDA;
import net.dv8tion.jda.core.Permission;
import net.dv8tion.jda.core.WebSocketCode;
import net.dv8tion.jda.core.audio.ConnectionRequest;
import net.dv8tion.jda.core.audio.ConnectionStage;
import net.dv8tion.jda.core.audio.hooks.ConnectionListener;
import net.dv8tion.jda.core.audio.hooks.ConnectionStatus;
import net.dv8tion.jda.core.entities.Guild;
import net.dv8tion.jda.core.entities.VoiceChannel;
import net.dv8tion.jda.core.entities.impl.GuildImpl;
import net.dv8tion.jda.core.entities.impl.JDAImpl;
import net.dv8tion.jda.core.events.*;
import net.dv8tion.jda.core.handle.*;
import net.dv8tion.jda.core.managers.AudioManager;
import net.dv8tion.jda.core.managers.impl.AudioManagerImpl;
import net.dv8tion.jda.core.managers.impl.PresenceImpl;
import net.dv8tion.jda.core.utils.JDALogger;
import net.dv8tion.jda.core.utils.MiscUtil;
import net.dv8tion.jda.core.utils.SessionController;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.MDC;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.lang.ref.SoftReference;
import java.time.OffsetDateTime;
import java.util.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.locks.ReentrantLock;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import java.util.zip.DataFormatException;
import java.util.zip.Inflater;
import java.util.zip.InflaterOutputStream;
public class WebSocketClient extends WebSocketAdapter implements WebSocketListener
{
public static final Logger LOG = JDALogger.getLog(WebSocketClient.class);
public static final int DISCORD_GATEWAY_VERSION = 6;
public static final int IDENTIFY_DELAY = 5;
public static final int ZLIB_SUFFIX = 0x0000FFFF;
protected static final String INVALIDATE_REASON = "INVALIDATE_SESSION";
protected static final long IDENTIFY_BACKOFF = TimeUnit.SECONDS.toMillis(SessionController.IDENTIFY_DELAY); // same as 1000 * IDENTIFY_DELAY
protected final JDAImpl api;
protected final JDA.ShardInfo shardInfo;
protected final Map<String, SocketHandler> handlers = new HashMap<>();
protected final Set<String> cfRays = ConcurrentHashMap.newKeySet();
protected final Set<String> traces = ConcurrentHashMap.newKeySet();
protected final boolean compression;
public WebSocket socket;
protected String sessionId = null;
protected final Object readLock = new Object();
protected Inflater zlibContext = new Inflater();
protected ByteArrayOutputStream readBuffer;
//this is a SoftReference in order to allow this resource to be freed to prevent resources starvation
protected SoftReference<ByteArrayOutputStream> decompressBuffer;
protected final ReentrantLock queueLock = new ReentrantLock();
protected final ScheduledExecutorService executor;
protected WebSocketSendingThread ratelimitThread;
protected volatile Future<?> keepAliveThread;
protected boolean initiating;
protected int reconnectTimeoutS = 2;
protected long heartbeatStartTime;
protected long identifyTime = 0;
protected final TLongObjectMap<ConnectionRequest> queuedAudioConnections = MiscUtil.newLongMap();
protected final Queue<String> chunkSyncQueue = new ConcurrentLinkedQueue<>();
protected final Queue<String> ratelimitQueue = new ConcurrentLinkedQueue<>();
protected volatile long ratelimitResetTime;
protected final AtomicInteger messagesSent = new AtomicInteger(0);
protected volatile boolean shutdown = false;
protected boolean shouldReconnect;
protected boolean handleIdentifyRateLimit = false;
protected boolean connected = false;
protected volatile boolean printedRateLimitMessage = false;
protected volatile boolean sentAuthInfo = false;
protected boolean firstInit = true;
protected boolean processingReady = true;
protected volatile ConnectNode connectNode;
public WebSocketClient(JDAImpl api, boolean compression)
{
this.api = api;
this.executor = api.getGatewayPool();
this.shardInfo = api.getShardInfo();
this.compression = compression;
this.shouldReconnect = api.isAutoReconnect();
this.connectNode = new StartingNode();
setupHandlers();
try
{
api.getSessionController().appendSession(connectNode);
}
catch (RuntimeException | Error e)
{
LOG.error("Failed to append new session to session controller queue. Shutting down!", e);
this.api.setStatus(JDA.Status.SHUTDOWN);
this.api.getEventManager().handle(
new ShutdownEvent(api, OffsetDateTime.now(), 1006));
if (e instanceof RuntimeException)
throw (RuntimeException) e;
else
throw (Error) e;
}
}
public JDA getJDA()
{
return api;
}
public Set<String> getCfRays()
{
return cfRays;
}
public Set<String> getTraces()
{
return traces;
}
protected void updateTraces(JSONArray arr, String type, int opCode)
{
WebSocketClient.LOG.debug("Received a _trace for {} (OP: {}) with {}", type, opCode, arr);
traces.clear();
for (Object o : arr)
traces.add(String.valueOf(o));
}
protected void allocateBuffer(byte[] binary) throws IOException
{
this.readBuffer = new ByteArrayOutputStream(binary.length * 2);
this.readBuffer.write(binary);
}
protected void extendBuffer(byte[] binary) throws IOException
{
if (this.readBuffer != null)
this.readBuffer.write(binary);
}
public void setAutoReconnect(boolean reconnect)
{
this.shouldReconnect = reconnect;
}
public boolean isConnected()
{
return connected;
}
public void ready()
{
if (initiating)
{
initiating = false;
processingReady = false;
if (firstInit)
{
firstInit = false;
if (api.getGuilds().size() >= 2000) //Show large warning when connected to >=2000 guilds
{
JDAImpl.LOG.warn(" __ __ _ ___ _ _ ___ _ _ ___ _ ");
JDAImpl.LOG.warn(" \\ \\ / //_\\ | _ \\| \\| ||_ _|| \\| | / __|| |");
JDAImpl.LOG.warn(" \\ \\/\\/ // _ \\ | /| .` | | | | .` || (_ ||_|");
JDAImpl.LOG.warn(" \\_/\\_//_/ \\_\\|_|_\\|_|\\_||___||_|\\_| \\___|(_)");
JDAImpl.LOG.warn("You're running a session with over 2000 connected");
JDAImpl.LOG.warn("guilds. You should shard the connection in order");
JDAImpl.LOG.warn("to split the load or things like resuming");
JDAImpl.LOG.warn("connection might not work as expected.");
JDAImpl.LOG.warn("For more info see https://git.io/vrFWP");
}
JDAImpl.LOG.info("Finished Loading!");
api.getEventManager().handle(new ReadyEvent(api, api.getResponseTotal()));
}
else
{
updateAudioManagerReferences();
JDAImpl.LOG.info("Finished (Re)Loading!");
api.getEventManager().handle(new ReconnectedEvent(api, api.getResponseTotal()));
}
}
else
{
JDAImpl.LOG.info("Successfully resumed Session!");
api.getEventManager().handle(new ResumedEvent(api, api.getResponseTotal()));
}
api.setStatus(JDA.Status.CONNECTED);
}
public boolean isReady()
{
return !initiating;
}
public void handle(List<JSONObject> events)
{
events.forEach(this::onDispatch);
}
public void send(String message)
{
locked("Interrupted while trying to add request to queue", () -> ratelimitQueue.add(message));
}
public void chunkOrSyncRequest(JSONObject request)
{
locked("Interrupted while trying to add chunk request", () -> chunkSyncQueue.add(request.toString()));
}
protected boolean send(String message, boolean skipQueue)
{
if (!connected)
return false;
long now = System.currentTimeMillis();
if (this.ratelimitResetTime <= now)
{
this.messagesSent.set(0);
this.ratelimitResetTime = now + 60000;//60 seconds
this.printedRateLimitMessage = false;
}
//Allows 115 messages to be sent before limiting.
if (this.messagesSent.get() <= 115 || (skipQueue && this.messagesSent.get() <= 119)) //technically we could go to 120, but we aren't going to chance it
{
LOG.trace("<- {}", message);
socket.sendText(message);
this.messagesSent.getAndIncrement();
return true;
}
else
{
if (!printedRateLimitMessage)
{
LOG.warn("Hit the WebSocket RateLimit! This can be caused by too many presence or voice status updates (connect/disconnect/mute/deaf). " +
"Regular: {} Voice: {} Chunking: {}", ratelimitQueue.size(), queuedAudioConnections.size(), chunkSyncQueue.size());
printedRateLimitMessage = true;
}
return false;
}
}
protected void setupSendingThread()
{
ratelimitThread = new WebSocketSendingThread(this);
ratelimitThread.start();
}
public void close()
{
if (socket != null)
socket.sendClose(1000);
}
public void close(int code)
{
if (socket != null)
socket.sendClose(code);
}
public void close(int code, String reason)
{
if (socket != null)
socket.sendClose(code, reason);
}
public synchronized void shutdown()
{
shutdown = true;
shouldReconnect = false;
if (connectNode != null)
api.getSessionController().removeSession(connectNode);
close(1000, "Shutting down");
}
/*
### Start Internal methods ###
*/
protected synchronized void connect()
{
if (api.getStatus() != JDA.Status.ATTEMPTING_TO_RECONNECT)
api.setStatus(JDA.Status.CONNECTING_TO_WEBSOCKET);
if (shutdown)
throw new RejectedExecutionException("JDA is shutdown!");
initiating = true;
String url = api.getGatewayUrl() + "?encoding=json&v=" + DISCORD_GATEWAY_VERSION;
if (compression)
{
url += "&compress=zlib-stream";
decompressBuffer = newDecompressBuffer();
}
try
{
socket = api.getWebSocketFactory()
.createSocket(url)
.addHeader("Accept-Encoding", "gzip")
.addListener(this);
socket.connect();
}
catch (IOException | WebSocketException e)
{
api.resetGatewayUrl();
//Completely fail here. We couldn't make the connection.
throw new IllegalStateException(e);
}
}
@Override
public void onThreadStarted(WebSocket websocket, ThreadType threadType, Thread thread) throws Exception
{
api.setContext();
}
@Override
public void onConnected(WebSocket websocket, Map<String, List<String>> headers)
{
api.setStatus(JDA.Status.IDENTIFYING_SESSION);
if (sessionId == null) //no need to log for resume here
LOG.info("Connected to WebSocket");
else
LOG.debug("Connected to WebSocket");
if (headers.containsKey("cf-ray"))
{
List<String> values = headers.get("cf-ray");
if (!values.isEmpty())
{
String ray = values.get(0);
cfRays.add(ray);
LOG.trace("Received new CF-RAY: {}", ray);
}
}
connected = true;
reconnectTimeoutS = 2;
messagesSent.set(0);
ratelimitResetTime = System.currentTimeMillis() + 60000;
if (sessionId == null)
sendIdentify();
else
sendResume();
}
@Override
public void onDisconnected(WebSocket websocket, WebSocketFrame serverCloseFrame, WebSocketFrame clientCloseFrame, boolean closedByServer)
{
sentAuthInfo = false;
connected = false;
api.setStatus(JDA.Status.DISCONNECTED);
CloseCode closeCode = null;
int rawCloseCode = 1000;
//When we get 1000 from remote close we will try to resume
// as apparently discord doesn't understand what "graceful disconnect" means
boolean isInvalidate = false;
if (keepAliveThread != null)
{
keepAliveThread.cancel(false);
keepAliveThread = null;
}
if (serverCloseFrame != null)
{
rawCloseCode = serverCloseFrame.getCloseCode();
closeCode = CloseCode.from(rawCloseCode);
if (closeCode == CloseCode.RATE_LIMITED)
LOG.error("WebSocket connection closed due to ratelimit! Sent more than 120 websocket messages in under 60 seconds!");
else if (closeCode != null)
LOG.debug("WebSocket connection closed with code {}", closeCode);
else
LOG.warn("WebSocket connection closed with unknown meaning for close-code {}", rawCloseCode);
}
if (clientCloseFrame != null
&& clientCloseFrame.getCloseCode() == 1000
&& Objects.equals(clientCloseFrame.getCloseReason(), INVALIDATE_REASON))
{
//When we close with 1000 we properly dropped our session due to invalidation
// in that case we can be sure that resume will not work and instead we invalidate and reconnect here
isInvalidate = true;
}
// null is considered -reconnectable- as we do not know the close-code meaning
boolean closeCodeIsReconnect = closeCode == null || closeCode.isReconnect();
if (!shouldReconnect || !closeCodeIsReconnect || executor.isShutdown()) //we should not reconnect
{
if (ratelimitThread != null)
{
ratelimitThread.shutdown();
ratelimitThread = null;
}
if (!closeCodeIsReconnect)
{
//it is possible that a token can be invalidated due to too many reconnect attempts
//or that a bot reached a new shard minimum and cannot connect with the current settings
//if that is the case we have to drop our connection and inform the user with a fatal error message
LOG.error("WebSocket connection was closed and cannot be recovered due to identification issues\n{}", closeCode);
}
api.shutdownInternals();
api.getEventManager().handle(new ShutdownEvent(api, OffsetDateTime.now(), rawCloseCode));
}
else
{
//reset our zlib decompression tools
synchronized (readLock)
{
zlibContext = new Inflater();
if (decompressBuffer != null)
decompressBuffer.clear();
readBuffer = null;
}
if (isInvalidate)
invalidate(); // 1000 means our session is dropped so we cannot resume
api.getEventManager().handle(new DisconnectEvent(api, serverCloseFrame, clientCloseFrame, closedByServer, OffsetDateTime.now()));
try
{
handleReconnect();
}
catch (InterruptedException e)
{
LOG.error("Failed to resume due to interrupted thread", e);
invalidate();
queueReconnect();
}
}
}
private void handleReconnect() throws InterruptedException
{
if (sessionId == null)
{
if (handleIdentifyRateLimit)
{
long backoff = calculateIdentifyBackoff();
if (backoff > 0)
{
// it seems that most of the time this is already sub-0 when we reach this point
LOG.error("Encountered IDENTIFY Rate Limit! Waiting {} milliseconds before trying again!", backoff);
Thread.sleep(backoff);
}
else
{
LOG.error("Encountered IDENTIFY Rate Limit!");
}
}
LOG.warn("Got disconnected from WebSocket. Appending to reconnect queue");
queueReconnect();
}
else // if resume is possible
{
LOG.warn("Got disconnected from WebSocket. Attempting to resume session");
reconnect();
}
}
protected long calculateIdentifyBackoff()
{
long currentTime = System.currentTimeMillis();
// calculate remaining backoff time since identify
return currentTime - (identifyTime + IDENTIFY_BACKOFF);
}
protected void queueReconnect()
{
try
{
this.api.setStatus(JDA.Status.RECONNECT_QUEUED);
this.connectNode = new ReconnectNode();
this.api.getSessionController().appendSession(connectNode);
}
catch (IllegalStateException ex)
{
LOG.error("Reconnect queue rejected session. Shutting down...");
this.api.setStatus(JDA.Status.SHUTDOWN);
this.api.getEventManager().handle(new ShutdownEvent(api, OffsetDateTime.now(), 1006));
}
}
protected void reconnect() throws InterruptedException
{
reconnect(false);
}
/**
* This method is used to start the reconnect of the JDA instance.
* It is public for access from SessionReconnectQueue extensions.
*
* @param callFromQueue
* whether this was in SessionReconnectQueue and got polled
*/
public void reconnect(boolean callFromQueue) throws InterruptedException
{
Set<MDC.MDCCloseable> contextEntries = null;
Map<String, String> previousContext = null;
{
ConcurrentMap<String, String> contextMap = api.getContextMap();
if (callFromQueue && contextMap != null)
{
previousContext = MDC.getCopyOfContextMap();
contextEntries = contextMap.entrySet().stream()
.map((entry) -> MDC.putCloseable(entry.getKey(), entry.getValue()))
.collect(Collectors.toSet());
}
}
if (shutdown)
{
api.setStatus(JDA.Status.SHUTDOWN);
api.getEventManager().handle(new ShutdownEvent(api, OffsetDateTime.now(), 1000));
return;
}
String message = "";
if (callFromQueue)
message = String.format("Queue is attempting to reconnect a shard...%s ", shardInfo != null ? " Shard: " + shardInfo.getShardString() : "");
LOG.debug("{}Attempting to reconnect in {}s", message, reconnectTimeoutS);
while (shouldReconnect)
{
api.setStatus(JDA.Status.WAITING_TO_RECONNECT);
int delay = reconnectTimeoutS;
Thread.sleep(delay * 1000);
handleIdentifyRateLimit = false;
api.setStatus(JDA.Status.ATTEMPTING_TO_RECONNECT);
LOG.debug("Attempting to reconnect!");
try
{
connect();
break;
}
catch (RejectedExecutionException ex)
{
// JDA has already been shutdown so we can stop here
api.setStatus(JDA.Status.SHUTDOWN);
api.getEventManager().handle(new ShutdownEvent(api, OffsetDateTime.now(), 1000));
return;
}
catch (RuntimeException ex)
{
reconnectTimeoutS = Math.min(reconnectTimeoutS << 1, api.getMaxReconnectDelay());
LOG.warn("Reconnect failed! Next attempt in {}s", reconnectTimeoutS);
}
}
if (contextEntries != null)
contextEntries.forEach(MDC.MDCCloseable::close);
if (previousContext != null)
previousContext.forEach(MDC::put);
}
protected void setupKeepAlive(long timeout)
{
keepAliveThread = executor.scheduleAtFixedRate(() ->
{
api.setContext();
if (connected)
sendKeepAlive();
}, 0, timeout, TimeUnit.MILLISECONDS);
}
protected void sendKeepAlive()
{
String keepAlivePacket =
new JSONObject()
.put("op", WebSocketCode.HEARTBEAT)
.put("d", api.getResponseTotal()
).toString();
send(keepAlivePacket, true);
heartbeatStartTime = System.currentTimeMillis();
}
protected void sendIdentify()
{
LOG.debug("Sending Identify-packet...");
PresenceImpl presenceObj = (PresenceImpl) api.getPresence();
JSONObject connectionProperties = new JSONObject()
.put("$os", System.getProperty("os.name"))
.put("$browser", "JDA")
.put("$device", "JDA")
.put("$referring_domain", "")
.put("$referrer", "");
JSONObject payload = new JSONObject()
.put("presence", presenceObj.getFullPresence())
.put("token", getToken())
.put("properties", connectionProperties)
.put("v", DISCORD_GATEWAY_VERSION)
.put("large_threshold", 250);
//Used to make the READY event be given
// as compressed binary data when over a certain size. TY @ShadowLordAlpha
//.put("compress", true);
JSONObject identify = new JSONObject()
.put("op", WebSocketCode.IDENTIFY)
.put("d", payload);
if (shardInfo != null)
{
payload
.put("shard", new JSONArray()
.put(shardInfo.getShardId())
.put(shardInfo.getShardTotal()));
}
send(identify.toString(), true);
handleIdentifyRateLimit = true;
identifyTime = System.currentTimeMillis();
sentAuthInfo = true;
api.setStatus(JDA.Status.AWAITING_LOGIN_CONFIRMATION);
}
protected void sendResume()
{
LOG.debug("Sending Resume-packet...");
JSONObject resume = new JSONObject()
.put("op", WebSocketCode.RESUME)
.put("d", new JSONObject()
.put("session_id", sessionId)
.put("token", getToken())
.put("seq", api.getResponseTotal()));
send(resume.toString(), true);
//sentAuthInfo = true; set on RESUMED response as this could fail
api.setStatus(JDA.Status.AWAITING_LOGIN_CONFIRMATION);
}
protected void invalidate()
{
sessionId = null;
sentAuthInfo = false;
locked("Interrupted while trying to invalidate chunk/sync queue", chunkSyncQueue::clear);
api.getTextChannelMap().clear();
api.getVoiceChannelMap().clear();
api.getCategoryMap().clear();
api.getGuildMap().clear();
api.getUserMap().clear();
api.getPrivateChannelMap().clear();
api.getFakeUserMap().clear();
api.getFakePrivateChannelMap().clear();
api.getEventCache().clear();
api.getGuildSetupController().clearCache();
if (api.getAccountType() == AccountType.CLIENT)
{
JDAClientImpl client = api.asClient();
client.getRelationshipMap().clear();
client.getGroupMap().clear();
client.getCallUserMap().clear();
}
}
protected void updateAudioManagerReferences()
{
final TLongObjectMap<AudioManager> managerMap = api.getAudioManagerMap();
if (managerMap.size() > 0)
LOG.trace("Updating AudioManager references");
synchronized (managerMap)
{
for (TLongObjectIterator<AudioManager> it = managerMap.iterator(); it.hasNext(); )
{
it.advance();
final long guildId = it.key();
final AudioManagerImpl mng = (AudioManagerImpl) it.value();
GuildImpl guild = (GuildImpl) api.getGuildById(guildId);
if (guild == null)
{
//We no longer have access to the guild that this audio manager was for. Set the value to null.
queuedAudioConnections.remove(guildId);
mng.closeAudioConnection(ConnectionStatus.DISCONNECTED_REMOVED_DURING_RECONNECT);
it.remove();
}
}
}
}
protected String getToken()
{
if (api.getAccountType() == AccountType.BOT)
return api.getToken().substring("Bot ".length());
return api.getToken();
}
protected List<JSONObject> convertPresencesReplace(long responseTotal, JSONArray array)
{
// Needs special handling due to content of "d" being an array
List<JSONObject> output = new LinkedList<>();
for (int i = 0; i < array.length(); i++)
{
JSONObject presence = array.getJSONObject(i);
final JSONObject obj = new JSONObject();
obj.put("jda-field", "This was constructed from a PRESENCES_REPLACE payload")
.put("op", WebSocketCode.DISPATCH)
.put("s", responseTotal)
.put("d", presence)
.put("t", "PRESENCE_UPDATE");
output.add(obj);
}
return output;
}
protected void handleEvent(JSONObject content)
{
try
{
onEvent(content);
}
catch (Exception ex)
{
LOG.error("Encountered exception on lifecycle level\nJSON: {}", content, ex);
api.getEventManager().handle(new ExceptionEvent(api, ex, true));
}
}
protected void onEvent(JSONObject content)
{
int opCode = content.getInt("op");
if (!content.isNull("s"))
{
api.setResponseTotal(content.getInt("s"));
}
switch (opCode)
{
case WebSocketCode.DISPATCH:
onDispatch(content);
break;
case WebSocketCode.HEARTBEAT:
LOG.debug("Got Keep-Alive request (OP 1). Sending response...");
sendKeepAlive();
break;
case WebSocketCode.RECONNECT:
LOG.debug("Got Reconnect request (OP 7). Closing connection now...");
close(4000, "OP 7: RECONNECT");
break;
case WebSocketCode.INVALIDATE_SESSION:
LOG.debug("Got Invalidate request (OP 9). Invalidating...");
handleIdentifyRateLimit = handleIdentifyRateLimit && System.currentTimeMillis() - identifyTime < IDENTIFY_BACKOFF;
sentAuthInfo = false;
final boolean isResume = content.getBoolean("d");
// When d: true we can wait a bit and then try to resume again
//sending 4000 to not drop session
int closeCode = isResume ? 4000 : 1000;
if (isResume)
LOG.debug("Session can be recovered... Closing and sending new RESUME request");
else
invalidate();
close(closeCode, INVALIDATE_REASON);
break;
case WebSocketCode.HELLO:
LOG.debug("Got HELLO packet (OP 10). Initializing keep-alive.");
final JSONObject data = content.getJSONObject("d");
setupKeepAlive(data.getLong("heartbeat_interval"));
if (!data.isNull("_trace"))
updateTraces(data.getJSONArray("_trace"), "HELLO", WebSocketCode.HELLO);
break;
case WebSocketCode.HEARTBEAT_ACK:
LOG.trace("Got Heartbeat Ack (OP 11).");
api.setPing(System.currentTimeMillis() - heartbeatStartTime);
break;
default:
LOG.debug("Got unknown op-code: {} with content: {}", opCode, content);
}
}
protected void onDispatch(JSONObject raw)
{
String type = raw.getString("t");
long responseTotal = api.getResponseTotal();
if (!(raw.opt("d") instanceof JSONObject))
{
// Needs special handling due to content of "d" being an array
if (type.equals("PRESENCES_REPLACE"))
{
final JSONArray payload = raw.getJSONArray("d");
final List<JSONObject> converted = convertPresencesReplace(responseTotal, payload);
final PresenceUpdateHandler handler = getHandler("PRESENCE_UPDATE");
LOG.trace("{} -> {}", type, payload);
for (JSONObject o : converted)
handler.handle(responseTotal, o);
}
else
{
LOG.debug("Received event with unhandled body type JSON: {}", raw);
}
return;
}
JSONObject content = raw.getJSONObject("d");
LOG.trace("{} -> {}", type, content);
JDAImpl jda = (JDAImpl) getJDA();
try
{
switch (type)
{
//INIT types
case "READY":
api.setStatus(JDA.Status.LOADING_SUBSYSTEMS);
processingReady = true;
handleIdentifyRateLimit = false;
sessionId = content.getString("session_id");
if (!content.isNull("_trace"))
updateTraces(content.getJSONArray("_trace"), "READY", WebSocketCode.DISPATCH);
handlers.get("READY").handle(responseTotal, raw);
break;
case "RESUMED":
sentAuthInfo = true;
if (!processingReady)
{
initiating = false;
ready();
}
else
{
LOG.debug("Resumed while still processing initial ready");
jda.setStatus(JDA.Status.LOADING_SUBSYSTEMS);
}
if (!content.isNull("_trace"))
updateTraces(content.getJSONArray("_trace"), "RESUMED", WebSocketCode.DISPATCH);
break;
default:
SocketHandler handler = handlers.get(type);
if (handler != null)
handler.handle(responseTotal, raw);
else
LOG.debug("Unrecognized event:\n{}", raw);
}
}
catch (JSONException ex)
{
LOG.warn("Got an unexpected Json-parse error. Please redirect following message to the devs:\n\t{}\n\t{} -> {}",
ex.getMessage(), type, content, ex);
}
catch (Exception ex)
{
LOG.error("Got an unexpected error. Please redirect following message to the devs:\n\t{} -> {}", type, content, ex);
}
if (responseTotal % EventCache.TIMEOUT_AMOUNT == 0)
jda.getEventCache().timeout(responseTotal);
}
@Override
public void onTextMessage(WebSocket websocket, String message)
{
handleEvent(new JSONObject(message));
}
@Override
public void onBinaryMessage(WebSocket websocket, byte[] binary) throws IOException, DataFormatException
{
JSONObject json;
synchronized (readLock)
{
if (!onBufferMessage(binary))
return;
json = handleBinary(binary);
}
handleEvent(json);
}
protected boolean onBufferMessage(byte[] binary) throws IOException
{
if (binary.length >= 4 && getInt(binary, binary.length - 4) == ZLIB_SUFFIX)
{
extendBuffer(binary);
return true;
}
if (readBuffer != null)
extendBuffer(binary);
else
allocateBuffer(binary);
return false;
}
protected JSONObject handleBinary(byte[] binary) throws DataFormatException, UnsupportedEncodingException
{
//Thanks to ShadowLordAlpha and Shredder121 for code and debugging.
//Get the compressed message and inflate it
//We use the same buffer here to optimize gc use
ByteArrayOutputStream decompressBuffer = getDecompressBuffer();
try (InflaterOutputStream decompressor = new InflaterOutputStream(decompressBuffer, zlibContext))
{
if (readBuffer != null)
readBuffer.writeTo(decompressor);
else
decompressor.write(binary);
}
catch (IOException e)
{
decompressBuffer.reset();
throw (DataFormatException) new DataFormatException("Malformed").initCause(e);
}
finally { readBuffer = null; }
String jsonString = decompressBuffer.toString("UTF-8");
decompressBuffer.reset();
return new JSONObject(jsonString);
}
protected ByteArrayOutputStream getDecompressBuffer()
{
if (decompressBuffer == null)
decompressBuffer = newDecompressBuffer();
ByteArrayOutputStream buffer = decompressBuffer.get();
if (buffer == null)
decompressBuffer = new SoftReference<>(buffer = new ByteArrayOutputStream(1024));
return buffer;
}
protected static int getInt(byte[] sink, int offset)
{
return sink[offset + 3] & 0xFF
| (sink[offset + 2] & 0xFF) << 8
| (sink[offset + 1] & 0xFF) << 16
| (sink[offset ] & 0xFF) << 24;
}
@Override
public void onUnexpectedError(WebSocket websocket, WebSocketException cause) throws Exception
{
handleCallbackError(websocket, cause);
}
@Override
public void handleCallbackError(WebSocket websocket, Throwable cause)
{
LOG.error("There was an error in the WebSocket connection", cause);
api.getEventManager().handle(new ExceptionEvent(api, cause, true));
}
@Override
public void onThreadCreated(WebSocket websocket, ThreadType threadType, Thread thread) throws Exception
{
String identifier = api.getIdentifierString();
switch (threadType)
{
case CONNECT_THREAD:
thread.setName(identifier + " MainWS-ConnectThread");
break;
case FINISH_THREAD:
thread.setName(identifier + " MainWS-FinishThread");
break;
case READING_THREAD:
thread.setName(identifier + " MainWS-ReadThread");
break;
case WRITING_THREAD:
thread.setName(identifier + " MainWS-WriteThread");
break;
default:
thread.setName(identifier + " MainWS-" + threadType);
}
}