Updated the files.

my-app/node_modules/socket.io-adapter/LICENSE

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+(The MIT License)
+
+Copyright (c) 2014 Guillermo Rauch <guillermo@learnboost.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the 'Software'), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

my-app/node_modules/socket.io-adapter/Readme.md

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+
+# socket.io-adapter
+
+Default socket.io in-memory adapter class.
+
+Compatibility table:
+
+| Adapter version | Socket.IO server version |
+|-----------------| ------------------------ |
+| 1.x.x           | 1.x.x / 2.x.x            |
+| 2.x.x           | 3.x.x                    |
+
+## How to use
+
+This module is not intended for end-user usage, but can be used as an
+interface to inherit from other adapters you might want to build.
+
+As an example of an adapter that builds on top of this, please take a look
+at [socket.io-redis](https://github.com/learnboost/socket.io-redis).
+
+## License
+
+MIT

my-app/node_modules/socket.io-adapter/dist/contrib/yeast.d.ts

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+/**
+ * Return a string representing the specified number.
+ *
+ * @param {Number} num The number to convert.
+ * @returns {String} The string representation of the number.
+ * @api public
+ */
+export declare function encode(num: any): string;
+/**
+ * Return the integer value specified by the given string.
+ *
+ * @param {String} str The string to convert.
+ * @returns {Number} The integer value represented by the string.
+ * @api public
+ */
+export declare function decode(str: any): number;
+/**
+ * Yeast: A tiny growing id generator.
+ *
+ * @returns {String} A unique id.
+ * @api public
+ */
+export declare function yeast(): string;

my-app/node_modules/socket.io-adapter/dist/contrib/yeast.js

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+// imported from https://github.com/unshiftio/yeast
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.yeast = exports.decode = exports.encode = void 0;
+const alphabet = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_".split(""), length = 64, map = {};
+let seed = 0, i = 0, prev;
+/**
+ * Return a string representing the specified number.
+ *
+ * @param {Number} num The number to convert.
+ * @returns {String} The string representation of the number.
+ * @api public
+ */
+function encode(num) {
+    let encoded = "";
+    do {
+        encoded = alphabet[num % length] + encoded;
+        num = Math.floor(num / length);
+    } while (num > 0);
+    return encoded;
+}
+exports.encode = encode;
+/**
+ * Return the integer value specified by the given string.
+ *
+ * @param {String} str The string to convert.
+ * @returns {Number} The integer value represented by the string.
+ * @api public
+ */
+function decode(str) {
+    let decoded = 0;
+    for (i = 0; i < str.length; i++) {
+        decoded = decoded * length + map[str.charAt(i)];
+    }
+    return decoded;
+}
+exports.decode = decode;
+/**
+ * Yeast: A tiny growing id generator.
+ *
+ * @returns {String} A unique id.
+ * @api public
+ */
+function yeast() {
+    const now = encode(+new Date());
+    if (now !== prev)
+        return (seed = 0), (prev = now);
+    return now + "." + encode(seed++);
+}
+exports.yeast = yeast;
+//
+// Map each character to its index.
+//
+for (; i < length; i++)
+    map[alphabet[i]] = i;

my-app/node_modules/socket.io-adapter/dist/index.d.ts

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+/// <reference types="node" />
+import { EventEmitter } from "events";
+/**
+ * A public ID, sent by the server at the beginning of the Socket.IO session and which can be used for private messaging
+ */
+export type SocketId = string;
+/**
+ * A private ID, sent by the server at the beginning of the Socket.IO session and used for connection state recovery
+ * upon reconnection
+ */
+export type PrivateSessionId = string;
+export type Room = string;
+export interface BroadcastFlags {
+    volatile?: boolean;
+    compress?: boolean;
+    local?: boolean;
+    broadcast?: boolean;
+    binary?: boolean;
+    timeout?: number;
+}
+export interface BroadcastOptions {
+    rooms: Set<Room>;
+    except?: Set<Room>;
+    flags?: BroadcastFlags;
+}
+interface SessionToPersist {
+    sid: SocketId;
+    pid: PrivateSessionId;
+    rooms: Room[];
+    data: unknown;
+}
+export type Session = SessionToPersist & {
+    missedPackets: unknown[][];
+};
+export declare class Adapter extends EventEmitter {
+    readonly nsp: any;
+    rooms: Map<Room, Set<SocketId>>;
+    sids: Map<SocketId, Set<Room>>;
+    private readonly encoder;
+    /**
+     * In-memory adapter constructor.
+     *
+     * @param {Namespace} nsp
+     */
+    constructor(nsp: any);
+    /**
+     * To be overridden
+     */
+    init(): Promise<void> | void;
+    /**
+     * To be overridden
+     */
+    close(): Promise<void> | void;
+    /**
+     * Returns the number of Socket.IO servers in the cluster
+     *
+     * @public
+     */
+    serverCount(): Promise<number>;
+    /**
+     * Adds a socket to a list of room.
+     *
+     * @param {SocketId}  id      the socket id
+     * @param {Set<Room>} rooms   a set of rooms
+     * @public
+     */
+    addAll(id: SocketId, rooms: Set<Room>): Promise<void> | void;
+    /**
+     * Removes a socket from a room.
+     *
+     * @param {SocketId} id     the socket id
+     * @param {Room}     room   the room name
+     */
+    del(id: SocketId, room: Room): Promise<void> | void;
+    private _del;
+    /**
+     * Removes a socket from all rooms it's joined.
+     *
+     * @param {SocketId} id   the socket id
+     */
+    delAll(id: SocketId): void;
+    /**
+     * Broadcasts a packet.
+     *
+     * Options:
+     *  - `flags` {Object} flags for this packet
+     *  - `except` {Array} sids that should be excluded
+     *  - `rooms` {Array} list of rooms to broadcast to
+     *
+     * @param {Object} packet   the packet object
+     * @param {Object} opts     the options
+     * @public
+     */
+    broadcast(packet: any, opts: BroadcastOptions): void;
+    /**
+     * Broadcasts a packet and expects multiple acknowledgements.
+     *
+     * Options:
+     *  - `flags` {Object} flags for this packet
+     *  - `except` {Array} sids that should be excluded
+     *  - `rooms` {Array} list of rooms to broadcast to
+     *
+     * @param {Object} packet   the packet object
+     * @param {Object} opts     the options
+     * @param clientCountCallback - the number of clients that received the packet
+     * @param ack                 - the callback that will be called for each client response
+     *
+     * @public
+     */
+    broadcastWithAck(packet: any, opts: BroadcastOptions, clientCountCallback: (clientCount: number) => void, ack: (...args: any[]) => void): void;
+    private _encode;
+    /**
+     * Gets a list of sockets by sid.
+     *
+     * @param {Set<Room>} rooms   the explicit set of rooms to check.
+     */
+    sockets(rooms: Set<Room>): Promise<Set<SocketId>>;
+    /**
+     * Gets the list of rooms a given socket has joined.
+     *
+     * @param {SocketId} id   the socket id
+     */
+    socketRooms(id: SocketId): Set<Room> | undefined;
+    /**
+     * Returns the matching socket instances
+     *
+     * @param opts - the filters to apply
+     */
+    fetchSockets(opts: BroadcastOptions): Promise<any[]>;
+    /**
+     * Makes the matching socket instances join the specified rooms
+     *
+     * @param opts - the filters to apply
+     * @param rooms - the rooms to join
+     */
+    addSockets(opts: BroadcastOptions, rooms: Room[]): void;
+    /**
+     * Makes the matching socket instances leave the specified rooms
+     *
+     * @param opts - the filters to apply
+     * @param rooms - the rooms to leave
+     */
+    delSockets(opts: BroadcastOptions, rooms: Room[]): void;
+    /**
+     * Makes the matching socket instances disconnect
+     *
+     * @param opts - the filters to apply
+     * @param close - whether to close the underlying connection
+     */
+    disconnectSockets(opts: BroadcastOptions, close: boolean): void;
+    private apply;
+    private computeExceptSids;
+    /**
+     * Send a packet to the other Socket.IO servers in the cluster
+     * @param packet - an array of arguments, which may include an acknowledgement callback at the end
+     */
+    serverSideEmit(packet: any[]): void;
+    /**
+     * Save the client session in order to restore it upon reconnection.
+     */
+    persistSession(session: SessionToPersist): void;
+    /**
+     * Restore the session and find the packets that were missed by the client.
+     * @param pid
+     * @param offset
+     */
+    restoreSession(pid: PrivateSessionId, offset: string): Promise<Session>;
+}
+export declare class SessionAwareAdapter extends Adapter {
+    readonly nsp: any;
+    private readonly maxDisconnectionDuration;
+    private sessions;
+    private packets;
+    constructor(nsp: any);
+    persistSession(session: SessionToPersist): void;
+    restoreSession(pid: PrivateSessionId, offset: string): Promise<Session>;
+    broadcast(packet: any, opts: BroadcastOptions): void;
+}
+export {};

my-app/node_modules/socket.io-adapter/dist/index.js

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+"use strict";
+var _a;
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.SessionAwareAdapter = exports.Adapter = void 0;
+const events_1 = require("events");
+const yeast_1 = require("./contrib/yeast");
+const WebSocket = require("ws");
+const canPreComputeFrame = typeof ((_a = WebSocket === null || WebSocket === void 0 ? void 0 : WebSocket.Sender) === null || _a === void 0 ? void 0 : _a.frame) === "function";
+class Adapter extends events_1.EventEmitter {
+    /**
+     * In-memory adapter constructor.
+     *
+     * @param {Namespace} nsp
+     */
+    constructor(nsp) {
+        super();
+        this.nsp = nsp;
+        this.rooms = new Map();
+        this.sids = new Map();
+        this.encoder = nsp.server.encoder;
+    }
+    /**
+     * To be overridden
+     */
+    init() { }
+    /**
+     * To be overridden
+     */
+    close() { }
+    /**
+     * Returns the number of Socket.IO servers in the cluster
+     *
+     * @public
+     */
+    serverCount() {
+        return Promise.resolve(1);
+    }
+    /**
+     * Adds a socket to a list of room.
+     *
+     * @param {SocketId}  id      the socket id
+     * @param {Set<Room>} rooms   a set of rooms
+     * @public
+     */
+    addAll(id, rooms) {
+        if (!this.sids.has(id)) {
+            this.sids.set(id, new Set());
+        }
+        for (const room of rooms) {
+            this.sids.get(id).add(room);
+            if (!this.rooms.has(room)) {
+                this.rooms.set(room, new Set());
+                this.emit("create-room", room);
+            }
+            if (!this.rooms.get(room).has(id)) {
+                this.rooms.get(room).add(id);
+                this.emit("join-room", room, id);
+            }
+        }
+    }
+    /**
+     * Removes a socket from a room.
+     *
+     * @param {SocketId} id     the socket id
+     * @param {Room}     room   the room name
+     */
+    del(id, room) {
+        if (this.sids.has(id)) {
+            this.sids.get(id).delete(room);
+        }
+        this._del(room, id);
+    }
+    _del(room, id) {
+        const _room = this.rooms.get(room);
+        if (_room != null) {
+            const deleted = _room.delete(id);
+            if (deleted) {
+                this.emit("leave-room", room, id);
+            }
+            if (_room.size === 0 && this.rooms.delete(room)) {
+                this.emit("delete-room", room);
+            }
+        }
+    }
+    /**
+     * Removes a socket from all rooms it's joined.
+     *
+     * @param {SocketId} id   the socket id
+     */
+    delAll(id) {
+        if (!this.sids.has(id)) {
+            return;
+        }
+        for (const room of this.sids.get(id)) {
+            this._del(room, id);
+        }
+        this.sids.delete(id);
+    }
+    /**
+     * Broadcasts a packet.
+     *
+     * Options:
+     *  - `flags` {Object} flags for this packet
+     *  - `except` {Array} sids that should be excluded
+     *  - `rooms` {Array} list of rooms to broadcast to
+     *
+     * @param {Object} packet   the packet object
+     * @param {Object} opts     the options
+     * @public
+     */
+    broadcast(packet, opts) {
+        const flags = opts.flags || {};
+        const packetOpts = {
+            preEncoded: true,
+            volatile: flags.volatile,
+            compress: flags.compress,
+        };
+        packet.nsp = this.nsp.name;
+        const encodedPackets = this._encode(packet, packetOpts);
+        this.apply(opts, (socket) => {
+            if (typeof socket.notifyOutgoingListeners === "function") {
+                socket.notifyOutgoingListeners(packet);
+            }
+            socket.client.writeToEngine(encodedPackets, packetOpts);
+        });
+    }
+    /**
+     * Broadcasts a packet and expects multiple acknowledgements.
+     *
+     * Options:
+     *  - `flags` {Object} flags for this packet
+     *  - `except` {Array} sids that should be excluded
+     *  - `rooms` {Array} list of rooms to broadcast to
+     *
+     * @param {Object} packet   the packet object
+     * @param {Object} opts     the options
+     * @param clientCountCallback - the number of clients that received the packet
+     * @param ack                 - the callback that will be called for each client response
+     *
+     * @public
+     */
+    broadcastWithAck(packet, opts, clientCountCallback, ack) {
+        const flags = opts.flags || {};
+        const packetOpts = {
+            preEncoded: true,
+            volatile: flags.volatile,
+            compress: flags.compress,
+        };
+        packet.nsp = this.nsp.name;
+        // we can use the same id for each packet, since the _ids counter is common (no duplicate)
+        packet.id = this.nsp._ids++;
+        const encodedPackets = this._encode(packet, packetOpts);
+        let clientCount = 0;
+        this.apply(opts, (socket) => {
+            // track the total number of acknowledgements that are expected
+            clientCount++;
+            // call the ack callback for each client response
+            socket.acks.set(packet.id, ack);
+            if (typeof socket.notifyOutgoingListeners === "function") {
+                socket.notifyOutgoingListeners(packet);
+            }
+            socket.client.writeToEngine(encodedPackets, packetOpts);
+        });
+        clientCountCallback(clientCount);
+    }
+    _encode(packet, packetOpts) {
+        const encodedPackets = this.encoder.encode(packet);
+        if (canPreComputeFrame &&
+            encodedPackets.length === 1 &&
+            typeof encodedPackets[0] === "string") {
+            // "4" being the "message" packet type in the Engine.IO protocol
+            const data = Buffer.from("4" + encodedPackets[0]);
+            // see https://github.com/websockets/ws/issues/617#issuecomment-283002469
+            packetOpts.wsPreEncodedFrame = WebSocket.Sender.frame(data, {
+                readOnly: false,
+                mask: false,
+                rsv1: false,
+                opcode: 1,
+                fin: true,
+            });
+        }
+        return encodedPackets;
+    }
+    /**
+     * Gets a list of sockets by sid.
+     *
+     * @param {Set<Room>} rooms   the explicit set of rooms to check.
+     */
+    sockets(rooms) {
+        const sids = new Set();
+        this.apply({ rooms }, (socket) => {
+            sids.add(socket.id);
+        });
+        return Promise.resolve(sids);
+    }
+    /**
+     * Gets the list of rooms a given socket has joined.
+     *
+     * @param {SocketId} id   the socket id
+     */
+    socketRooms(id) {
+        return this.sids.get(id);
+    }
+    /**
+     * Returns the matching socket instances
+     *
+     * @param opts - the filters to apply
+     */
+    fetchSockets(opts) {
+        const sockets = [];
+        this.apply(opts, (socket) => {
+            sockets.push(socket);
+        });
+        return Promise.resolve(sockets);
+    }
+    /**
+     * Makes the matching socket instances join the specified rooms
+     *
+     * @param opts - the filters to apply
+     * @param rooms - the rooms to join
+     */
+    addSockets(opts, rooms) {
+        this.apply(opts, (socket) => {
+            socket.join(rooms);
+        });
+    }
+    /**
+     * Makes the matching socket instances leave the specified rooms
+     *
+     * @param opts - the filters to apply
+     * @param rooms - the rooms to leave
+     */
+    delSockets(opts, rooms) {
+        this.apply(opts, (socket) => {
+            rooms.forEach((room) => socket.leave(room));
+        });
+    }
+    /**
+     * Makes the matching socket instances disconnect
+     *
+     * @param opts - the filters to apply
+     * @param close - whether to close the underlying connection
+     */
+    disconnectSockets(opts, close) {
+        this.apply(opts, (socket) => {
+            socket.disconnect(close);
+        });
+    }
+    apply(opts, callback) {
+        const rooms = opts.rooms;
+        const except = this.computeExceptSids(opts.except);
+        if (rooms.size) {
+            const ids = new Set();
+            for (const room of rooms) {
+                if (!this.rooms.has(room))
+                    continue;
+                for (const id of this.rooms.get(room)) {
+                    if (ids.has(id) || except.has(id))
+                        continue;
+                    const socket = this.nsp.sockets.get(id);
+                    if (socket) {
+                        callback(socket);
+                        ids.add(id);
+                    }
+                }
+            }
+        }
+        else {
+            for (const [id] of this.sids) {
+                if (except.has(id))
+                    continue;
+                const socket = this.nsp.sockets.get(id);
+                if (socket)
+                    callback(socket);
+            }
+        }
+    }
+    computeExceptSids(exceptRooms) {
+        const exceptSids = new Set();
+        if (exceptRooms && exceptRooms.size > 0) {
+            for (const room of exceptRooms) {
+                if (this.rooms.has(room)) {
+                    this.rooms.get(room).forEach((sid) => exceptSids.add(sid));
+                }
+            }
+        }
+        return exceptSids;
+    }
+    /**
+     * Send a packet to the other Socket.IO servers in the cluster
+     * @param packet - an array of arguments, which may include an acknowledgement callback at the end
+     */
+    serverSideEmit(packet) {
+        console.warn("this adapter does not support the serverSideEmit() functionality");
+    }
+    /**
+     * Save the client session in order to restore it upon reconnection.
+     */
+    persistSession(session) { }
+    /**
+     * Restore the session and find the packets that were missed by the client.
+     * @param pid
+     * @param offset
+     */
+    restoreSession(pid, offset) {
+        return null;
+    }
+}
+exports.Adapter = Adapter;
+class SessionAwareAdapter extends Adapter {
+    constructor(nsp) {
+        super(nsp);
+        this.nsp = nsp;
+        this.sessions = new Map();
+        this.packets = [];
+        this.maxDisconnectionDuration =
+            nsp.server.opts.connectionStateRecovery.maxDisconnectionDuration;
+        const timer = setInterval(() => {
+            const threshold = Date.now() - this.maxDisconnectionDuration;
+            this.sessions.forEach((session, sessionId) => {
+                const hasExpired = session.disconnectedAt < threshold;
+                if (hasExpired) {
+                    this.sessions.delete(sessionId);
+                }
+            });
+            for (let i = this.packets.length - 1; i >= 0; i--) {
+                const hasExpired = this.packets[i].emittedAt < threshold;
+                if (hasExpired) {
+                    this.packets.splice(0, i + 1);
+                    break;
+                }
+            }
+        }, 60 * 1000);
+        // prevents the timer from keeping the process alive
+        timer.unref();
+    }
+    persistSession(session) {
+        session.disconnectedAt = Date.now();
+        this.sessions.set(session.pid, session);
+    }
+    restoreSession(pid, offset) {
+        const session = this.sessions.get(pid);
+        if (!session) {
+            // the session may have expired
+            return null;
+        }
+        const hasExpired = session.disconnectedAt + this.maxDisconnectionDuration < Date.now();
+        if (hasExpired) {
+            // the session has expired
+            this.sessions.delete(pid);
+            return null;
+        }
+        const index = this.packets.findIndex((packet) => packet.id === offset);
+        if (index === -1) {
+            // the offset may be too old
+            return null;
+        }
+        const missedPackets = [];
+        for (let i = index + 1; i < this.packets.length; i++) {
+            const packet = this.packets[i];
+            if (shouldIncludePacket(session.rooms, packet.opts)) {
+                missedPackets.push(packet.data);
+            }
+        }
+        return Promise.resolve(Object.assign(Object.assign({}, session), { missedPackets }));
+    }
+    broadcast(packet, opts) {
+        var _a;
+        const isEventPacket = packet.type === 2;
+        // packets with acknowledgement are not stored because the acknowledgement function cannot be serialized and
+        // restored on another server upon reconnection
+        const withoutAcknowledgement = packet.id === undefined;
+        const notVolatile = ((_a = opts.flags) === null || _a === void 0 ? void 0 : _a.volatile) === undefined;
+        if (isEventPacket && withoutAcknowledgement && notVolatile) {
+            const id = (0, yeast_1.yeast)();
+            // the offset is stored at the end of the data array, so the client knows the ID of the last packet it has
+            // processed (and the format is backward-compatible)
+            packet.data.push(id);
+            this.packets.push({
+                id,
+                opts,
+                data: packet.data,
+                emittedAt: Date.now(),
+            });
+        }
+        super.broadcast(packet, opts);
+    }
+}
+exports.SessionAwareAdapter = SessionAwareAdapter;
+function shouldIncludePacket(sessionRooms, opts) {
+    const included = opts.rooms.size === 0 || sessionRooms.some((room) => opts.rooms.has(room));
+    const notExcluded = sessionRooms.every((room) => !opts.except.has(room));
+    return included && notExcluded;
+}

my-app/node_modules/socket.io-adapter/package.json

@@ -0,0 +1,34 @@
+{
+  "name": "socket.io-adapter",
+  "version": "2.5.2",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/socketio/socket.io-adapter.git"
+  },
+  "files": [
+    "dist/"
+  ],
+  "main": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "description": "default socket.io in-memory adapter",
+  "dependencies": {
+    "ws": "~8.11.0"
+  },
+  "devDependencies": {
+    "@types/mocha": "^10.0.1",
+    "@types/node": "^14.11.2",
+    "expect.js": "^0.3.1",
+    "mocha": "^10.2.0",
+    "nyc": "^15.1.0",
+    "prettier": "^2.8.1",
+    "ts-node": "^10.9.1",
+    "typescript": "^4.9.4"
+  },
+  "scripts": {
+    "test": "npm run format:check && tsc && nyc mocha --require ts-node/register test/index.ts",
+    "format:check": "prettier --parser typescript --check 'lib/**/*.ts' 'test/**/*.ts'",
+    "format:fix": "prettier --parser typescript --write 'lib/**/*.ts' 'test/**/*.ts'",
+    "prepack": "tsc"
+  }
+}