mirror of
https://github.com/discordjs/discord.js.git
synced 2026-03-11 09:03:29 +01:00
fix: Internal Sharding, this time fixed™ (#3140)
* src: WIP Internal Sharding refactor * src: Refactor unavailable guild check Co-Authored-By: kyranet <kyradiscord@gmail.com> * src: More WIP Code F in the chat to the old manager * src: It should work but Discord says no. Seriously why is this not working! * fix: Inflator causing issues * src: Finishing touches and typings * misc: Proper debug message * fix: Making things hidden needs writable: true as well * fix: Sharding allowing multiple of the same shard, negative shards or strings * fix: Again... edge cases I love you guys .w. * misc: Touchups * misc: Better error? * docs: Typo * typings: Requested changes * src: Requested changes * src: Fix issues, validate provided shard options and more * src: Forgot to remove the listener * lint: eslint complaining * fix: Setting shardCount to auto crashing the process * misc: Requested changes * typings: Correct typings for shardCount client option * typings: Add invalidSession event to the shard and correct typings * src: Minor docs adjustements, and code consistency between setHelloTimeout and setHeartbeatTimeout * src: Don't block reconnect while creating shards Might fix silent disconnects *again* * src: Prevent reconnect from running if the Manager isn't READY That way, if a shard dies while we're still spawning, it won't cause issues * fix: Retry to reconnect if there's a network error going on. The manager *should* keep reconnecting unless the token is invalid * src: Enhance onClose handler for shards in the manager - If the close code is between 1000 and 2000 (inclusive), you cannot resume I tested this locally - If there's a session ID still present, immediately try to resume Faster resumes :papaBless: Otherwise, the invalid session event will trigger and it'll handle accordingly I swear if I see a SINGULAR Silent DC I'm yeeting * src: Fix error check * src: Make sure message exists on the error * src: Used the wrong property for the shardQueue * src: Make the hello timeout be made by the client god help * docs: Correct docs for WSEvents * misc: Remove old events from the Events constant * src: Throw the HTTP error if we don't get a 401 * typings: Can't forget about them * src: Implement some more fail safes just in case Seriously, better safe than sorry! Gotta failproof it completely
This commit is contained in:
@@ -2,8 +2,7 @@
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const EventEmitter = require('events');
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const WebSocket = require('../../WebSocket');
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const { Status, Events, OPCodes, WSEvents, WSCodes } = require('../../util/Constants');
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const Util = require('../../util/Util');
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const { Status, Events, ShardEvents, OPCodes, WSEvents } = require('../../util/Constants');
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let zlib;
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try {
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@@ -21,13 +20,13 @@ class WebSocketShard extends EventEmitter {
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super();
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/**
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* The WebSocket Manager of this connection
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* The WebSocketManager of the shard
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* @type {WebSocketManager}
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*/
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this.manager = manager;
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/**
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* The ID of the this shard
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* The ID of the shard
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* @type {number}
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*/
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this.id = id;
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@@ -91,20 +90,22 @@ class WebSocketShard extends EventEmitter {
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* @type {Object}
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* @private
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*/
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this.ratelimit = {
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queue: [],
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total: 120,
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remaining: 120,
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time: 60e3,
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timer: null,
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};
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Object.defineProperty(this, 'ratelimit', {
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value: {
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queue: [],
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total: 120,
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remaining: 120,
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time: 60e3,
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timer: null,
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},
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});
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/**
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* The WebSocket connection for the current shard
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* @type {?WebSocket}
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* @private
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*/
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this.connection = null;
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Object.defineProperty(this, 'connection', { value: null, writable: true });
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/**
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* @external Inflate
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@@ -116,9 +117,21 @@ class WebSocketShard extends EventEmitter {
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* @type {?Inflate}
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* @private
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*/
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this.inflate = null;
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Object.defineProperty(this, 'inflate', { value: null, writable: true });
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if (this.manager.gateway) this.connect();
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/**
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* The HELLO timeout
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* @type {?NodeJS.Timer}
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* @private
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*/
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Object.defineProperty(this, 'helloTimeout', { value: null, writable: true });
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/**
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* If the manager attached its event handlers on the shard
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* @type {boolean}
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* @private
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*/
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Object.defineProperty(this, 'eventsAttached', { value: false, writable: true });
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}
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/**
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@@ -133,82 +146,86 @@ class WebSocketShard extends EventEmitter {
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/**
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* Emits a debug event.
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* @param {string} message Debug message
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* @param {string} message The debug message
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* @private
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*/
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debug(message) {
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this.manager.debug(`[Shard ${this.id}] ${message}`);
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this.manager.debug(message, this);
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}
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/**
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* Sends a heartbeat to the WebSocket.
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* If this shard didn't receive a heartbeat last time, it will destroy it and reconnect
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* @private
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*/
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sendHeartbeat() {
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if (!this.lastHeartbeatAcked) {
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this.debug("Didn't receive a heartbeat ack last time, assuming zombie conenction. Destroying and reconnecting.");
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this.connection.close(4000);
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return;
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}
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this.debug('Sending a heartbeat');
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this.lastHeartbeatAcked = false;
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this.lastPingTimestamp = Date.now();
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this.send({ op: OPCodes.HEARTBEAT, d: this.sequence });
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}
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/**
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* Sets the heartbeat timer for this shard.
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* @param {number} time If -1, clears the interval, any other number sets an interval
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* @private
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*/
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setHeartbeatTimer(time) {
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if (time === -1) {
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if (this.heartbeatInterval) {
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this.debug('Clearing heartbeat interval');
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this.manager.client.clearInterval(this.heartbeatInterval);
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this.heartbeatInterval = null;
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}
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return;
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}
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this.debug(`Setting a heartbeat interval for ${time}ms`);
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this.heartbeatInterval = this.manager.client.setInterval(() => this.sendHeartbeat(), time);
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}
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/**
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* Acknowledges a heartbeat.
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* @private
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*/
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ackHeartbeat() {
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this.lastHeartbeatAcked = true;
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const latency = Date.now() - this.lastPingTimestamp;
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this.debug(`Heartbeat acknowledged, latency of ${latency}ms`);
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this.pings.unshift(latency);
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if (this.pings.length > 3) this.pings.length = 3;
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}
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/**
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* Connects this shard to the gateway.
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* Connects the shard to the gateway.
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* @private
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* @returns {Promise<void>} A promise that will resolve if the shard turns ready successfully,
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* or reject if we couldn't connect
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*/
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connect() {
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const { expectingClose, gateway } = this.manager;
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if (expectingClose) return;
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this.inflate = new zlib.Inflate({
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chunkSize: 65535,
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flush: zlib.Z_SYNC_FLUSH,
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to: WebSocket.encoding === 'json' ? 'string' : '',
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const { gateway, client } = this.manager;
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if (this.status === Status.READY && this.connection && this.connection.readyState === WebSocket.OPEN) {
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return Promise.resolve();
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}
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return new Promise((resolve, reject) => {
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const onReady = () => {
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this.off(ShardEvents.CLOSE, onClose);
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this.off(ShardEvents.RESUMED, onResumed);
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this.off(ShardEvents.INVALID_SESSION, onInvalid);
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resolve();
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};
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const onResumed = () => {
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this.off(ShardEvents.CLOSE, onClose);
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this.off(ShardEvents.READY, onReady);
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this.off(ShardEvents.INVALID_SESSION, onInvalid);
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resolve();
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};
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const onClose = event => {
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this.off(ShardEvents.READY, onReady);
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this.off(ShardEvents.RESUMED, onResumed);
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this.off(ShardEvents.INVALID_SESSION, onInvalid);
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reject(event);
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};
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const onInvalid = () => {
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this.off(ShardEvents.READY, onReady);
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this.off(ShardEvents.RESUMED, onResumed);
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this.off(ShardEvents.CLOSE, onClose);
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// eslint-disable-next-line prefer-promise-reject-errors
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reject();
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};
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this.once(ShardEvents.READY, onReady);
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this.once(ShardEvents.RESUMED, onResumed);
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this.once(ShardEvents.CLOSE, onClose);
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this.once(ShardEvents.INVALID_SESSION, onInvalid);
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if (this.connection && this.connection.readyState === WebSocket.OPEN) {
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this.identifyNew();
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return;
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}
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this.inflate = new zlib.Inflate({
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chunkSize: 65535,
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flush: zlib.Z_SYNC_FLUSH,
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to: WebSocket.encoding === 'json' ? 'string' : '',
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});
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this.debug(`Trying to connect to ${gateway}, version ${client.options.ws.version}`);
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this.status = this.status === Status.DISCONNECTED ? Status.RECONNECTING : Status.CONNECTING;
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this.setHelloTimeout();
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const ws = this.connection = WebSocket.create(gateway, {
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v: client.options.ws.version,
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compress: 'zlib-stream',
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});
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ws.onopen = this.onOpen.bind(this);
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ws.onmessage = this.onMessage.bind(this);
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ws.onerror = this.onError.bind(this);
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ws.onclose = this.onClose.bind(this);
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});
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this.debug(`Connecting to ${gateway}`);
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const ws = this.connection = WebSocket.create(gateway, {
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v: this.manager.client.options.ws.version,
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compress: 'zlib-stream',
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});
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ws.onopen = this.onOpen.bind(this);
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ws.onmessage = this.onMessage.bind(this);
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ws.onerror = this.onError.bind(this);
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ws.onclose = this.onClose.bind(this);
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this.status = Status.CONNECTING;
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}
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/**
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@@ -216,7 +233,8 @@ class WebSocketShard extends EventEmitter {
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* @private
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*/
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onOpen() {
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this.debug('Connected to the gateway');
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this.debug('Opened a connection to the gateway successfully.');
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this.status = Status.NEARLY;
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}
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/**
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@@ -240,53 +258,106 @@ class WebSocketShard extends EventEmitter {
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packet = WebSocket.unpack(this.inflate.result);
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this.manager.client.emit(Events.RAW, packet, this.id);
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} catch (err) {
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this.manager.client.emit(Events.ERROR, err);
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this.manager.client.emit(Events.SHARD_ERROR, err, this.id);
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return;
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}
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this.onPacket(packet);
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}
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/**
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* Called whenever an error occurs with the WebSocket.
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* @param {ErrorEvent} error The error that occurred
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* @private
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*/
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onError({ error }) {
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if (error && error.message === 'uWs client connection error') {
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this.debug('Received a uWs error. Closing the connection and reconnecting...');
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this.connection.close(4000);
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return;
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}
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/**
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* Emitted whenever a shard's WebSocket encounters a connection error.
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* @event Client#shardError
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* @param {Error} error The encountered error
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* @param {number} shardID The shard that encountered this error
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*/
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this.manager.client.emit(Events.SHARD_ERROR, error, this.id);
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}
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/**
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* @external CloseEvent
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* @see {@link https://developer.mozilla.org/en-US/docs/Web/API/CloseEvent}
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*/
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/**
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* @external ErrorEvent
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* @see {@link https://developer.mozilla.org/en-US/docs/Web/API/ErrorEvent}
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*/
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/**
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* Called whenever a connection to the gateway is closed.
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* @param {CloseEvent} event Close event that was received
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* @private
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*/
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onClose(event) {
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this.closeSequence = this.sequence;
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this.sequence = -1;
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this.debug(`WebSocket was closed.
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Event Code: ${event.code}
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Clean: ${event.wasClean}
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Reason: ${event.reason || 'No reason received'}`);
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this.status = Status.DISCONNECTED;
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/**
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* Emitted when a shard's WebSocket closes.
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* @private
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* @event WebSocketShard#close
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* @param {CloseEvent} event The received event
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*/
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this.emit(ShardEvents.CLOSE, event);
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}
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/**
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* Called whenever a packet is received.
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* @param {Object} packet Packet received
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* @param {Object} packet The received packet
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* @private
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*/
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onPacket(packet) {
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if (!packet) {
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this.debug('Received null or broken packet');
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this.debug(`Received broken packet: ${packet}.`);
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return;
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}
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switch (packet.t) {
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case WSEvents.READY:
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/**
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* Emitted when a shard becomes ready.
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* Emitted when the shard becomes ready
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* @event WebSocketShard#ready
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*/
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this.emit(Events.READY);
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/**
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* Emitted when a shard becomes ready.
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* @event Client#shardReady
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* @param {number} shardID The ID of the shard
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*/
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this.manager.client.emit(Events.SHARD_READY, this.id);
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this.emit(ShardEvents.READY);
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this.sessionID = packet.d.session_id;
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this.trace = packet.d._trace;
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this.status = Status.READY;
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this.debug(`READY ${this.trace.join(' -> ')} | Session ${this.sessionID}`);
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this.debug(`READY ${this.trace.join(' -> ')} | Session ${this.sessionID}.`);
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this.lastHeartbeatAcked = true;
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this.sendHeartbeat();
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break;
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case WSEvents.RESUMED: {
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this.emit(Events.RESUMED);
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/**
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* Emitted when the shard resumes successfully
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* @event WebSocketShard#resumed
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*/
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this.emit(ShardEvents.RESUMED);
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this.trace = packet.d._trace;
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this.status = Status.READY;
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const replayed = packet.s - this.closeSequence;
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this.debug(`RESUMED ${this.trace.join(' -> ')} | Replayed ${replayed} events.`);
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this.debug(`RESUMED ${this.trace.join(' -> ')} | Session ${this.sessionID} | Replayed ${replayed} events.`);
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this.lastHeartbeatAcked = true;
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this.sendHeartbeat();
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break;
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}
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}
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@@ -294,6 +365,7 @@ class WebSocketShard extends EventEmitter {
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switch (packet.op) {
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case OPCodes.HELLO:
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this.setHelloTimeout(-1);
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this.setHeartbeatTimer(packet.d.heartbeat_interval);
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this.identify();
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break;
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@@ -301,21 +373,20 @@ class WebSocketShard extends EventEmitter {
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this.connection.close(1001);
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break;
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case OPCodes.INVALID_SESSION:
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this.debug(`Session was invalidated. Resumable: ${packet.d}.`);
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// If the session isn't resumable
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if (!packet.d) {
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// Reset the sequence, since it isn't valid anymore
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this.sequence = -1;
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// If we had a session ID before
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if (this.sessionID) {
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this.sessionID = null;
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this.connection.close(1000);
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return;
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}
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this.connection.close(1000);
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this.debug(`Session invalidated. Resumable: ${packet.d}.`);
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// If we can resume the session, do so immediately
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if (packet.d) {
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this.identifyResume();
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return;
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}
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this.identifyResume();
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// Reset the sequence
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this.sequence = -1;
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// Reset the session ID as it's invalid
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this.sessionID = null;
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// Set the status to reconnecting
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this.status = Status.RECONNECTING;
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// Finally, emit the INVALID_SESSION event
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this.emit(ShardEvents.INVALID_SESSION);
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break;
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case OPCodes.HEARTBEAT_ACK:
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this.ackHeartbeat();
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@@ -329,10 +400,78 @@ class WebSocketShard extends EventEmitter {
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}
|
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|
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/**
|
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* Identifies the client on a connection.
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* @returns {void}
|
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* Sets the HELLO packet timeout.
|
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* @param {number} [time] If set to -1, it will clear the hello timeout timeout
|
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* @private
|
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*/
|
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setHelloTimeout(time) {
|
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if (time === -1) {
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if (this.helloTimeout) {
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this.debug('Clearing the HELLO timeout.');
|
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this.manager.client.clearTimeout(this.helloTimeout);
|
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this.helloTimeout = null;
|
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}
|
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return;
|
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}
|
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this.debug('Setting a HELLO timeout for 20s.');
|
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this.helloTimeout = this.manager.client.setTimeout(() => {
|
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this.debug('Did not receive HELLO in time. Destroying and connecting again.');
|
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this.destroy(4009);
|
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}, 20000);
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the heartbeat timer for this shard.
|
||||
* @param {number} time If -1, clears the interval, any other number sets an interval
|
||||
* @private
|
||||
*/
|
||||
setHeartbeatTimer(time) {
|
||||
if (time === -1) {
|
||||
if (this.heartbeatInterval) {
|
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this.debug('Clearing the heartbeat interval.');
|
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this.manager.client.clearInterval(this.heartbeatInterval);
|
||||
this.heartbeatInterval = null;
|
||||
}
|
||||
return;
|
||||
}
|
||||
this.debug(`Setting a heartbeat interval for ${time}ms.`);
|
||||
this.heartbeatInterval = this.manager.client.setInterval(() => this.sendHeartbeat(), time);
|
||||
}
|
||||
|
||||
/**
|
||||
* Sends a heartbeat to the WebSocket.
|
||||
* If this shard didn't receive a heartbeat last time, it will destroy it and reconnect
|
||||
* @private
|
||||
*/
|
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sendHeartbeat() {
|
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if (!this.lastHeartbeatAcked) {
|
||||
this.debug("Didn't receive a heartbeat ack last time, assuming zombie conenction. Destroying and reconnecting.");
|
||||
this.destroy(4009);
|
||||
return;
|
||||
}
|
||||
this.debug('Sending a heartbeat.');
|
||||
this.lastHeartbeatAcked = false;
|
||||
this.lastPingTimestamp = Date.now();
|
||||
this.send({ op: OPCodes.HEARTBEAT, d: this.sequence }, true);
|
||||
}
|
||||
|
||||
/**
|
||||
* Acknowledges a heartbeat.
|
||||
* @private
|
||||
*/
|
||||
ackHeartbeat() {
|
||||
this.lastHeartbeatAcked = true;
|
||||
const latency = Date.now() - this.lastPingTimestamp;
|
||||
this.debug(`Heartbeat acknowledged, latency of ${latency}ms.`);
|
||||
this.pings.unshift(latency);
|
||||
if (this.pings.length > 3) this.pings.length = 3;
|
||||
}
|
||||
|
||||
/**
|
||||
* Identifies the client on the connection.
|
||||
* @private
|
||||
* @returns {void}
|
||||
*/
|
||||
identify() {
|
||||
return this.sessionID ? this.identifyResume() : this.identifyNew();
|
||||
}
|
||||
@@ -342,31 +481,32 @@ class WebSocketShard extends EventEmitter {
|
||||
* @private
|
||||
*/
|
||||
identifyNew() {
|
||||
if (!this.manager.client.token) {
|
||||
this.debug('No token available to identify a new session with');
|
||||
const { client } = this.manager;
|
||||
if (!client.token) {
|
||||
this.debug('No token available to identify a new session.');
|
||||
return;
|
||||
}
|
||||
// Clone the generic payload and assign the token
|
||||
|
||||
// Clone the identify payload and assign the token and shard info
|
||||
const d = {
|
||||
...this.manager.client.options.ws,
|
||||
token: this.manager.client.token,
|
||||
shard: [this.id, Number(this.manager.client.options.totalShardCount)],
|
||||
...client.options.ws,
|
||||
token: client.token,
|
||||
shard: [this.id, Number(client.options.totalShardCount)],
|
||||
};
|
||||
|
||||
// Send the payload
|
||||
this.debug('Identifying as a new session');
|
||||
this.send({ op: OPCodes.IDENTIFY, d });
|
||||
this.debug(`Identifying as a new session. Shard ${this.id}/${client.options.totalShardCount}`);
|
||||
this.send({ op: OPCodes.IDENTIFY, d }, true);
|
||||
}
|
||||
|
||||
/**
|
||||
* Resumes a session on the gateway.
|
||||
* @returns {void}
|
||||
* @private
|
||||
*/
|
||||
identifyResume() {
|
||||
if (!this.sessionID) {
|
||||
this.debug('Warning: wanted to resume but session ID not available; identifying as a new session instead');
|
||||
return this.identifyNew();
|
||||
this.debug('Warning: attempted to resume but no session ID was present; identifying as a new session.');
|
||||
this.identifyNew();
|
||||
return;
|
||||
}
|
||||
|
||||
this.debug(`Attempting to resume session ${this.sessionID} at sequence ${this.closeSequence}`);
|
||||
@@ -377,85 +517,19 @@ class WebSocketShard extends EventEmitter {
|
||||
seq: this.closeSequence,
|
||||
};
|
||||
|
||||
return this.send({ op: OPCodes.RESUME, d });
|
||||
this.send({ op: OPCodes.RESUME, d }, true);
|
||||
}
|
||||
|
||||
/**
|
||||
* Called whenever an error occurs with the WebSocket.
|
||||
* @param {Error} error The error that occurred
|
||||
* @private
|
||||
* Adds a packet to the queue to be sent to the gateway.
|
||||
* <warn>If you use this method, make sure you understand that you need to provide
|
||||
* a full [Payload](https://discordapp.com/developers/docs/topics/gateway#commands-and-events-gateway-commands).
|
||||
* Do not use this method if you don't know what you're doing.</warn>
|
||||
* @param {Object} data The full packet to send
|
||||
* @param {?boolean} [important=false] If this packet should be added first in queue
|
||||
*/
|
||||
onError(error) {
|
||||
if (error && error.message === 'uWs client connection error') {
|
||||
this.connection.close(4000);
|
||||
return;
|
||||
}
|
||||
|
||||
/**
|
||||
* Emitted whenever the client's WebSocket encounters a connection error.
|
||||
* @event Client#error
|
||||
* @param {Error} error The encountered error
|
||||
* @param {number} shardID The shard that encountered this error
|
||||
*/
|
||||
this.manager.client.emit(Events.ERROR, error, this.id);
|
||||
}
|
||||
|
||||
/**
|
||||
* @external CloseEvent
|
||||
* @see {@link https://developer.mozilla.org/en-US/docs/Web/API/CloseEvent}
|
||||
*/
|
||||
|
||||
/**
|
||||
* Called whenever a connection to the gateway is closed.
|
||||
* @param {CloseEvent} event Close event that was received
|
||||
* @private
|
||||
*/
|
||||
onClose(event) {
|
||||
this.closeSequence = this.sequence;
|
||||
this.debug(`WebSocket was closed.
|
||||
Event Code: ${event.code}
|
||||
Reason: ${event.reason}`);
|
||||
|
||||
if (event.code === 1000 ? this.manager.expectingClose : WSCodes[event.code]) {
|
||||
/**
|
||||
* Emitted when the client's WebSocket disconnects and will no longer attempt to reconnect.
|
||||
* @event Client#disconnect
|
||||
* @param {CloseEvent} event The WebSocket close event
|
||||
* @param {number} shardID The shard that disconnected
|
||||
*/
|
||||
this.manager.client.emit(Events.DISCONNECT, event, this.id);
|
||||
this.debug(WSCodes[event.code]);
|
||||
return;
|
||||
}
|
||||
|
||||
this.destroy();
|
||||
|
||||
this.status = Status.RECONNECTING;
|
||||
|
||||
/**
|
||||
* Emitted whenever a shard tries to reconnect to the WebSocket.
|
||||
* @event Client#reconnecting
|
||||
* @param {number} shardID The shard ID that is reconnecting
|
||||
*/
|
||||
this.manager.client.emit(Events.RECONNECTING, this.id);
|
||||
|
||||
this.debug(`${this.sessionID ? `Reconnecting in 3500ms` : 'Queueing a reconnect'} to the gateway...`);
|
||||
|
||||
if (this.sessionID) {
|
||||
Util.delayFor(3500).then(() => this.connect());
|
||||
} else {
|
||||
this.manager.reconnect(this);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Adds data to the queue to be sent.
|
||||
* @param {Object} data Packet to send
|
||||
* @private
|
||||
* @returns {void}
|
||||
*/
|
||||
send(data) {
|
||||
this.ratelimit.queue.push(data);
|
||||
send(data, important = false) {
|
||||
this.ratelimit.queue[important ? 'unshift' : 'push'](data);
|
||||
this.processQueue();
|
||||
}
|
||||
|
||||
@@ -472,7 +546,7 @@ class WebSocketShard extends EventEmitter {
|
||||
}
|
||||
|
||||
this.connection.send(WebSocket.pack(data), err => {
|
||||
if (err) this.manager.client.emit(Events.ERROR, err);
|
||||
if (err) this.manager.client.emit(Events.SHARD_ERROR, err, this.id);
|
||||
});
|
||||
}
|
||||
|
||||
@@ -499,21 +573,36 @@ class WebSocketShard extends EventEmitter {
|
||||
}
|
||||
|
||||
/**
|
||||
* Destroys this shard and closes its connection.
|
||||
* Destroys this shard and closes its WebSocket connection.
|
||||
* @param {?number} [closeCode=1000] The close code to use
|
||||
* @private
|
||||
*/
|
||||
destroy() {
|
||||
destroy(closeCode = 1000) {
|
||||
this.setHeartbeatTimer(-1);
|
||||
if (this.connection) this.connection.close(1000);
|
||||
this.setHelloTimeout(-1);
|
||||
// Close the WebSocket connection, if any
|
||||
if (this.connection) {
|
||||
this.connection.close(closeCode);
|
||||
} else {
|
||||
/**
|
||||
* Emitted when a shard is destroyed, but no WebSocket connection was present.
|
||||
* @private
|
||||
* @event WebSocketShard#destroyed
|
||||
*/
|
||||
this.emit(ShardEvents.DESTROYED);
|
||||
}
|
||||
this.connection = null;
|
||||
// Set the shard status
|
||||
this.status = Status.DISCONNECTED;
|
||||
// Reset the sequence
|
||||
this.sequence = -1;
|
||||
// Reset the ratelimit data
|
||||
this.ratelimit.remaining = this.ratelimit.total;
|
||||
this.ratelimit.queue.length = 0;
|
||||
if (this.ratelimit.timer) {
|
||||
this.manager.client.clearTimeout(this.ratelimit.timer);
|
||||
this.ratelimit.timer = null;
|
||||
}
|
||||
this.sequence = -1;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
Reference in New Issue
Block a user