Initial

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

@@ -0,0 +1,20 @@
+(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.

resources/app/node_modules/socket.io-adapter/dist/cluster-adapter.js

@@ -0,0 +1,674 @@
+"use strict";
+var __rest = (this && this.__rest) || function (s, e) {
+    var t = {};
+    for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
+        t[p] = s[p];
+    if (s != null && typeof Object.getOwnPropertySymbols === "function")
+        for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {
+            if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))
+                t[p[i]] = s[p[i]];
+        }
+    return t;
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.ClusterAdapterWithHeartbeat = exports.ClusterAdapter = exports.MessageType = void 0;
+const in_memory_adapter_1 = require("./in-memory-adapter");
+const debug_1 = require("debug");
+const crypto_1 = require("crypto");
+const debug = (0, debug_1.debug)("socket.io-adapter");
+const EMITTER_UID = "emitter";
+const DEFAULT_TIMEOUT = 5000;
+function randomId() {
+    return (0, crypto_1.randomBytes)(8).toString("hex");
+}
+var MessageType;
+(function (MessageType) {
+    MessageType[MessageType["INITIAL_HEARTBEAT"] = 1] = "INITIAL_HEARTBEAT";
+    MessageType[MessageType["HEARTBEAT"] = 2] = "HEARTBEAT";
+    MessageType[MessageType["BROADCAST"] = 3] = "BROADCAST";
+    MessageType[MessageType["SOCKETS_JOIN"] = 4] = "SOCKETS_JOIN";
+    MessageType[MessageType["SOCKETS_LEAVE"] = 5] = "SOCKETS_LEAVE";
+    MessageType[MessageType["DISCONNECT_SOCKETS"] = 6] = "DISCONNECT_SOCKETS";
+    MessageType[MessageType["FETCH_SOCKETS"] = 7] = "FETCH_SOCKETS";
+    MessageType[MessageType["FETCH_SOCKETS_RESPONSE"] = 8] = "FETCH_SOCKETS_RESPONSE";
+    MessageType[MessageType["SERVER_SIDE_EMIT"] = 9] = "SERVER_SIDE_EMIT";
+    MessageType[MessageType["SERVER_SIDE_EMIT_RESPONSE"] = 10] = "SERVER_SIDE_EMIT_RESPONSE";
+    MessageType[MessageType["BROADCAST_CLIENT_COUNT"] = 11] = "BROADCAST_CLIENT_COUNT";
+    MessageType[MessageType["BROADCAST_ACK"] = 12] = "BROADCAST_ACK";
+    MessageType[MessageType["ADAPTER_CLOSE"] = 13] = "ADAPTER_CLOSE";
+})(MessageType = exports.MessageType || (exports.MessageType = {}));
+function encodeOptions(opts) {
+    return {
+        rooms: [...opts.rooms],
+        except: [...opts.except],
+        flags: opts.flags,
+    };
+}
+function decodeOptions(opts) {
+    return {
+        rooms: new Set(opts.rooms),
+        except: new Set(opts.except),
+        flags: opts.flags,
+    };
+}
+/**
+ * A cluster-ready adapter. Any extending class must:
+ *
+ * - implement {@link ClusterAdapter#doPublish} and {@link ClusterAdapter#doPublishResponse}
+ * - call {@link ClusterAdapter#onMessage} and {@link ClusterAdapter#onResponse}
+ */
+class ClusterAdapter extends in_memory_adapter_1.Adapter {
+    constructor(nsp) {
+        super(nsp);
+        this.requests = new Map();
+        this.ackRequests = new Map();
+        this.uid = randomId();
+    }
+    /**
+     * Called when receiving a message from another member of the cluster.
+     *
+     * @param message
+     * @param offset
+     * @protected
+     */
+    onMessage(message, offset) {
+        if (message.uid === this.uid) {
+            return debug("[%s] ignore message from self", this.uid);
+        }
+        debug("[%s] new event of type %d from %s", this.uid, message.type, message.uid);
+        switch (message.type) {
+            case MessageType.BROADCAST: {
+                const withAck = message.data.requestId !== undefined;
+                if (withAck) {
+                    super.broadcastWithAck(message.data.packet, decodeOptions(message.data.opts), (clientCount) => {
+                        debug("[%s] waiting for %d client acknowledgements", this.uid, clientCount);
+                        this.publishResponse(message.uid, {
+                            type: MessageType.BROADCAST_CLIENT_COUNT,
+                            data: {
+                                requestId: message.data.requestId,
+                                clientCount,
+                            },
+                        });
+                    }, (arg) => {
+                        debug("[%s] received acknowledgement with value %j", this.uid, arg);
+                        this.publishResponse(message.uid, {
+                            type: MessageType.BROADCAST_ACK,
+                            data: {
+                                requestId: message.data.requestId,
+                                packet: arg,
+                            },
+                        });
+                    });
+                }
+                else {
+                    const packet = message.data.packet;
+                    const opts = decodeOptions(message.data.opts);
+                    this.addOffsetIfNecessary(packet, opts, offset);
+                    super.broadcast(packet, opts);
+                }
+                break;
+            }
+            case MessageType.SOCKETS_JOIN:
+                super.addSockets(decodeOptions(message.data.opts), message.data.rooms);
+                break;
+            case MessageType.SOCKETS_LEAVE:
+                super.delSockets(decodeOptions(message.data.opts), message.data.rooms);
+                break;
+            case MessageType.DISCONNECT_SOCKETS:
+                super.disconnectSockets(decodeOptions(message.data.opts), message.data.close);
+                break;
+            case MessageType.FETCH_SOCKETS: {
+                debug("[%s] calling fetchSockets with opts %j", this.uid, message.data.opts);
+                super
+                    .fetchSockets(decodeOptions(message.data.opts))
+                    .then((localSockets) => {
+                    this.publishResponse(message.uid, {
+                        type: MessageType.FETCH_SOCKETS_RESPONSE,
+                        data: {
+                            requestId: message.data.requestId,
+                            sockets: localSockets.map((socket) => {
+                                // remove sessionStore from handshake, as it may contain circular references
+                                const _a = socket.handshake, { sessionStore } = _a, handshake = __rest(_a, ["sessionStore"]);
+                                return {
+                                    id: socket.id,
+                                    handshake,
+                                    rooms: [...socket.rooms],
+                                    data: socket.data,
+                                };
+                            }),
+                        },
+                    });
+                });
+                break;
+            }
+            case MessageType.SERVER_SIDE_EMIT: {
+                const packet = message.data.packet;
+                const withAck = message.data.requestId !== undefined;
+                if (!withAck) {
+                    this.nsp._onServerSideEmit(packet);
+                    return;
+                }
+                let called = false;
+                const callback = (arg) => {
+                    // only one argument is expected
+                    if (called) {
+                        return;
+                    }
+                    called = true;
+                    debug("[%s] calling acknowledgement with %j", this.uid, arg);
+                    this.publishResponse(message.uid, {
+                        type: MessageType.SERVER_SIDE_EMIT_RESPONSE,
+                        data: {
+                            requestId: message.data.requestId,
+                            packet: arg,
+                        },
+                    });
+                };
+                this.nsp._onServerSideEmit([...packet, callback]);
+                break;
+            }
+            // @ts-ignore
+            case MessageType.BROADCAST_CLIENT_COUNT:
+            // @ts-ignore
+            case MessageType.BROADCAST_ACK:
+            // @ts-ignore
+            case MessageType.FETCH_SOCKETS_RESPONSE:
+            // @ts-ignore
+            case MessageType.SERVER_SIDE_EMIT_RESPONSE:
+                // extending classes may not make a distinction between a ClusterMessage and a ClusterResponse payload and may
+                // always call the onMessage() method
+                this.onResponse(message);
+                break;
+            default:
+                debug("[%s] unknown message type: %s", this.uid, message.type);
+        }
+    }
+    /**
+     * Called when receiving a response from another member of the cluster.
+     *
+     * @param response
+     * @protected
+     */
+    onResponse(response) {
+        var _a, _b;
+        const requestId = response.data.requestId;
+        debug("[%s] received response %s to request %s", this.uid, response.type, requestId);
+        switch (response.type) {
+            case MessageType.BROADCAST_CLIENT_COUNT: {
+                (_a = this.ackRequests
+                    .get(requestId)) === null || _a === void 0 ? void 0 : _a.clientCountCallback(response.data.clientCount);
+                break;
+            }
+            case MessageType.BROADCAST_ACK: {
+                (_b = this.ackRequests.get(requestId)) === null || _b === void 0 ? void 0 : _b.ack(response.data.packet);
+                break;
+            }
+            case MessageType.FETCH_SOCKETS_RESPONSE: {
+                const request = this.requests.get(requestId);
+                if (!request) {
+                    return;
+                }
+                request.current++;
+                response.data.sockets.forEach((socket) => request.responses.push(socket));
+                if (request.current === request.expected) {
+                    clearTimeout(request.timeout);
+                    request.resolve(request.responses);
+                    this.requests.delete(requestId);
+                }
+                break;
+            }
+            case MessageType.SERVER_SIDE_EMIT_RESPONSE: {
+                const request = this.requests.get(requestId);
+                if (!request) {
+                    return;
+                }
+                request.current++;
+                request.responses.push(response.data.packet);
+                if (request.current === request.expected) {
+                    clearTimeout(request.timeout);
+                    request.resolve(null, request.responses);
+                    this.requests.delete(requestId);
+                }
+                break;
+            }
+            default:
+                // @ts-ignore
+                debug("[%s] unknown response type: %s", this.uid, response.type);
+        }
+    }
+    async broadcast(packet, opts) {
+        var _a;
+        const onlyLocal = (_a = opts.flags) === null || _a === void 0 ? void 0 : _a.local;
+        if (!onlyLocal) {
+            try {
+                const offset = await this.publishAndReturnOffset({
+                    type: MessageType.BROADCAST,
+                    data: {
+                        packet,
+                        opts: encodeOptions(opts),
+                    },
+                });
+                this.addOffsetIfNecessary(packet, opts, offset);
+            }
+            catch (e) {
+                return debug("[%s] error while broadcasting message: %s", this.uid, e.message);
+            }
+        }
+        super.broadcast(packet, opts);
+    }
+    /**
+     * Adds an offset at the end of the data array in order to allow the client to receive any missed packets when it
+     * reconnects after a temporary disconnection.
+     *
+     * @param packet
+     * @param opts
+     * @param offset
+     * @private
+     */
+    addOffsetIfNecessary(packet, opts, offset) {
+        var _a;
+        if (!this.nsp.server.opts.connectionStateRecovery) {
+            return;
+        }
+        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) {
+            packet.data.push(offset);
+        }
+    }
+    broadcastWithAck(packet, opts, clientCountCallback, ack) {
+        var _a;
+        const onlyLocal = (_a = opts === null || opts === void 0 ? void 0 : opts.flags) === null || _a === void 0 ? void 0 : _a.local;
+        if (!onlyLocal) {
+            const requestId = randomId();
+            this.ackRequests.set(requestId, {
+                clientCountCallback,
+                ack,
+            });
+            this.publish({
+                type: MessageType.BROADCAST,
+                data: {
+                    packet,
+                    requestId,
+                    opts: encodeOptions(opts),
+                },
+            });
+            // we have no way to know at this level whether the server has received an acknowledgement from each client, so we
+            // will simply clean up the ackRequests map after the given delay
+            setTimeout(() => {
+                this.ackRequests.delete(requestId);
+            }, opts.flags.timeout);
+        }
+        super.broadcastWithAck(packet, opts, clientCountCallback, ack);
+    }
+    async addSockets(opts, rooms) {
+        var _a;
+        const onlyLocal = (_a = opts.flags) === null || _a === void 0 ? void 0 : _a.local;
+        if (!onlyLocal) {
+            try {
+                await this.publishAndReturnOffset({
+                    type: MessageType.SOCKETS_JOIN,
+                    data: {
+                        opts: encodeOptions(opts),
+                        rooms,
+                    },
+                });
+            }
+            catch (e) {
+                debug("[%s] error while publishing message: %s", this.uid, e.message);
+            }
+        }
+        super.addSockets(opts, rooms);
+    }
+    async delSockets(opts, rooms) {
+        var _a;
+        const onlyLocal = (_a = opts.flags) === null || _a === void 0 ? void 0 : _a.local;
+        if (!onlyLocal) {
+            try {
+                await this.publishAndReturnOffset({
+                    type: MessageType.SOCKETS_LEAVE,
+                    data: {
+                        opts: encodeOptions(opts),
+                        rooms,
+                    },
+                });
+            }
+            catch (e) {
+                debug("[%s] error while publishing message: %s", this.uid, e.message);
+            }
+        }
+        super.delSockets(opts, rooms);
+    }
+    async disconnectSockets(opts, close) {
+        var _a;
+        const onlyLocal = (_a = opts.flags) === null || _a === void 0 ? void 0 : _a.local;
+        if (!onlyLocal) {
+            try {
+                await this.publishAndReturnOffset({
+                    type: MessageType.DISCONNECT_SOCKETS,
+                    data: {
+                        opts: encodeOptions(opts),
+                        close,
+                    },
+                });
+            }
+            catch (e) {
+                debug("[%s] error while publishing message: %s", this.uid, e.message);
+            }
+        }
+        super.disconnectSockets(opts, close);
+    }
+    async fetchSockets(opts) {
+        var _a;
+        const [localSockets, serverCount] = await Promise.all([
+            super.fetchSockets(opts),
+            this.serverCount(),
+        ]);
+        const expectedResponseCount = serverCount - 1;
+        if (((_a = opts.flags) === null || _a === void 0 ? void 0 : _a.local) || expectedResponseCount <= 0) {
+            return localSockets;
+        }
+        const requestId = randomId();
+        return new Promise((resolve, reject) => {
+            const timeout = setTimeout(() => {
+                const storedRequest = this.requests.get(requestId);
+                if (storedRequest) {
+                    reject(new Error(`timeout reached: only ${storedRequest.current} responses received out of ${storedRequest.expected}`));
+                    this.requests.delete(requestId);
+                }
+            }, opts.flags.timeout || DEFAULT_TIMEOUT);
+            const storedRequest = {
+                type: MessageType.FETCH_SOCKETS,
+                resolve,
+                timeout,
+                current: 0,
+                expected: expectedResponseCount,
+                responses: localSockets,
+            };
+            this.requests.set(requestId, storedRequest);
+            this.publish({
+                type: MessageType.FETCH_SOCKETS,
+                data: {
+                    opts: encodeOptions(opts),
+                    requestId,
+                },
+            });
+        });
+    }
+    async serverSideEmit(packet) {
+        const withAck = typeof packet[packet.length - 1] === "function";
+        if (!withAck) {
+            return this.publish({
+                type: MessageType.SERVER_SIDE_EMIT,
+                data: {
+                    packet,
+                },
+            });
+        }
+        const ack = packet.pop();
+        const expectedResponseCount = (await this.serverCount()) - 1;
+        debug('[%s] waiting for %d responses to "serverSideEmit" request', this.uid, expectedResponseCount);
+        if (expectedResponseCount <= 0) {
+            return ack(null, []);
+        }
+        const requestId = randomId();
+        const timeout = setTimeout(() => {
+            const storedRequest = this.requests.get(requestId);
+            if (storedRequest) {
+                ack(new Error(`timeout reached: only ${storedRequest.current} responses received out of ${storedRequest.expected}`), storedRequest.responses);
+                this.requests.delete(requestId);
+            }
+        }, DEFAULT_TIMEOUT);
+        const storedRequest = {
+            type: MessageType.SERVER_SIDE_EMIT,
+            resolve: ack,
+            timeout,
+            current: 0,
+            expected: expectedResponseCount,
+            responses: [],
+        };
+        this.requests.set(requestId, storedRequest);
+        this.publish({
+            type: MessageType.SERVER_SIDE_EMIT,
+            data: {
+                requestId,
+                packet,
+            },
+        });
+    }
+    publish(message) {
+        this.publishAndReturnOffset(message).catch((err) => {
+            debug("[%s] error while publishing message: %s", this.uid, err);
+        });
+    }
+    publishAndReturnOffset(message) {
+        message.uid = this.uid;
+        message.nsp = this.nsp.name;
+        return this.doPublish(message);
+    }
+    publishResponse(requesterUid, response) {
+        response.uid = this.uid;
+        response.nsp = this.nsp.name;
+        this.doPublishResponse(requesterUid, response).catch((err) => {
+            debug("[%s] error while publishing response: %s", this.uid, err);
+        });
+    }
+}
+exports.ClusterAdapter = ClusterAdapter;
+class ClusterAdapterWithHeartbeat extends ClusterAdapter {
+    constructor(nsp, opts) {
+        super(nsp);
+        this.nodesMap = new Map(); // uid => timestamp of last message
+        this.customRequests = new Map();
+        this._opts = Object.assign({
+            heartbeatInterval: 5000,
+            heartbeatTimeout: 10000,
+        }, opts);
+        this.cleanupTimer = setInterval(() => {
+            const now = Date.now();
+            this.nodesMap.forEach((lastSeen, uid) => {
+                const nodeSeemsDown = now - lastSeen > this._opts.heartbeatTimeout;
+                if (nodeSeemsDown) {
+                    debug("[%s] node %s seems down", this.uid, uid);
+                    this.removeNode(uid);
+                }
+            });
+        }, 1000);
+    }
+    init() {
+        this.publish({
+            type: MessageType.INITIAL_HEARTBEAT,
+        });
+    }
+    scheduleHeartbeat() {
+        if (this.heartbeatTimer) {
+            this.heartbeatTimer.refresh();
+        }
+        else {
+            this.heartbeatTimer = setTimeout(() => {
+                this.publish({
+                    type: MessageType.HEARTBEAT,
+                });
+            }, this._opts.heartbeatInterval);
+        }
+    }
+    close() {
+        this.publish({
+            type: MessageType.ADAPTER_CLOSE,
+        });
+        clearTimeout(this.heartbeatTimer);
+        if (this.cleanupTimer) {
+            clearInterval(this.cleanupTimer);
+        }
+    }
+    onMessage(message, offset) {
+        if (message.uid === this.uid) {
+            return debug("[%s] ignore message from self", this.uid);
+        }
+        if (message.uid && message.uid !== EMITTER_UID) {
+            // we track the UID of each sender, in order to know how many servers there are in the cluster
+            this.nodesMap.set(message.uid, Date.now());
+        }
+        debug("[%s] new event of type %d from %s", this.uid, message.type, message.uid);
+        switch (message.type) {
+            case MessageType.INITIAL_HEARTBEAT:
+                this.publish({
+                    type: MessageType.HEARTBEAT,
+                });
+                break;
+            case MessageType.HEARTBEAT:
+                // nothing to do
+                break;
+            case MessageType.ADAPTER_CLOSE:
+                this.removeNode(message.uid);
+                break;
+            default:
+                super.onMessage(message, offset);
+        }
+    }
+    serverCount() {
+        return Promise.resolve(1 + this.nodesMap.size);
+    }
+    publish(message) {
+        this.scheduleHeartbeat();
+        return super.publish(message);
+    }
+    async serverSideEmit(packet) {
+        const withAck = typeof packet[packet.length - 1] === "function";
+        if (!withAck) {
+            return this.publish({
+                type: MessageType.SERVER_SIDE_EMIT,
+                data: {
+                    packet,
+                },
+            });
+        }
+        const ack = packet.pop();
+        const expectedResponseCount = this.nodesMap.size;
+        debug('[%s] waiting for %d responses to "serverSideEmit" request', this.uid, expectedResponseCount);
+        if (expectedResponseCount <= 0) {
+            return ack(null, []);
+        }
+        const requestId = randomId();
+        const timeout = setTimeout(() => {
+            const storedRequest = this.customRequests.get(requestId);
+            if (storedRequest) {
+                ack(new Error(`timeout reached: missing ${storedRequest.missingUids.size} responses`), storedRequest.responses);
+                this.customRequests.delete(requestId);
+            }
+        }, DEFAULT_TIMEOUT);
+        const storedRequest = {
+            type: MessageType.SERVER_SIDE_EMIT,
+            resolve: ack,
+            timeout,
+            missingUids: new Set([...this.nodesMap.keys()]),
+            responses: [],
+        };
+        this.customRequests.set(requestId, storedRequest);
+        this.publish({
+            type: MessageType.SERVER_SIDE_EMIT,
+            data: {
+                requestId,
+                packet,
+            },
+        });
+    }
+    async fetchSockets(opts) {
+        var _a;
+        const [localSockets, serverCount] = await Promise.all([
+            super.fetchSockets({
+                rooms: opts.rooms,
+                except: opts.except,
+                flags: {
+                    local: true,
+                },
+            }),
+            this.serverCount(),
+        ]);
+        const expectedResponseCount = serverCount - 1;
+        if (((_a = opts.flags) === null || _a === void 0 ? void 0 : _a.local) || expectedResponseCount <= 0) {
+            return localSockets;
+        }
+        const requestId = randomId();
+        return new Promise((resolve, reject) => {
+            const timeout = setTimeout(() => {
+                const storedRequest = this.customRequests.get(requestId);
+                if (storedRequest) {
+                    reject(new Error(`timeout reached: missing ${storedRequest.missingUids.size} responses`));
+                    this.customRequests.delete(requestId);
+                }
+            }, opts.flags.timeout || DEFAULT_TIMEOUT);
+            const storedRequest = {
+                type: MessageType.FETCH_SOCKETS,
+                resolve,
+                timeout,
+                missingUids: new Set([...this.nodesMap.keys()]),
+                responses: localSockets,
+            };
+            this.customRequests.set(requestId, storedRequest);
+            this.publish({
+                type: MessageType.FETCH_SOCKETS,
+                data: {
+                    opts: encodeOptions(opts),
+                    requestId,
+                },
+            });
+        });
+    }
+    onResponse(response) {
+        const requestId = response.data.requestId;
+        debug("[%s] received response %s to request %s", this.uid, response.type, requestId);
+        switch (response.type) {
+            case MessageType.FETCH_SOCKETS_RESPONSE: {
+                const request = this.customRequests.get(requestId);
+                if (!request) {
+                    return;
+                }
+                response.data.sockets.forEach((socket) => request.responses.push(socket));
+                request.missingUids.delete(response.uid);
+                if (request.missingUids.size === 0) {
+                    clearTimeout(request.timeout);
+                    request.resolve(request.responses);
+                    this.customRequests.delete(requestId);
+                }
+                break;
+            }
+            case MessageType.SERVER_SIDE_EMIT_RESPONSE: {
+                const request = this.customRequests.get(requestId);
+                if (!request) {
+                    return;
+                }
+                request.responses.push(response.data.packet);
+                request.missingUids.delete(response.uid);
+                if (request.missingUids.size === 0) {
+                    clearTimeout(request.timeout);
+                    request.resolve(null, request.responses);
+                    this.customRequests.delete(requestId);
+                }
+                break;
+            }
+            default:
+                super.onResponse(response);
+        }
+    }
+    removeNode(uid) {
+        this.customRequests.forEach((request, requestId) => {
+            request.missingUids.delete(uid);
+            if (request.missingUids.size === 0) {
+                clearTimeout(request.timeout);
+                if (request.type === MessageType.FETCH_SOCKETS) {
+                    request.resolve(request.responses);
+                }
+                else if (request.type === MessageType.SERVER_SIDE_EMIT) {
+                    request.resolve(null, request.responses);
+                }
+                this.customRequests.delete(requestId);
+            }
+        });
+        this.nodesMap.delete(uid);
+    }
+}
+exports.ClusterAdapterWithHeartbeat = ClusterAdapterWithHeartbeat;

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

@@ -0,0 +1,55 @@
+// 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;

resources/app/node_modules/socket.io-adapter/dist/in-memory-adapter.js

@@ -0,0 +1,394 @@
+"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;
+}

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

@@ -0,0 +1,10 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.MessageType = exports.ClusterAdapterWithHeartbeat = exports.ClusterAdapter = exports.SessionAwareAdapter = exports.Adapter = void 0;
+var in_memory_adapter_1 = require("./in-memory-adapter");
+Object.defineProperty(exports, "Adapter", { enumerable: true, get: function () { return in_memory_adapter_1.Adapter; } });
+Object.defineProperty(exports, "SessionAwareAdapter", { enumerable: true, get: function () { return in_memory_adapter_1.SessionAwareAdapter; } });
+var cluster_adapter_1 = require("./cluster-adapter");
+Object.defineProperty(exports, "ClusterAdapter", { enumerable: true, get: function () { return cluster_adapter_1.ClusterAdapter; } });
+Object.defineProperty(exports, "ClusterAdapterWithHeartbeat", { enumerable: true, get: function () { return cluster_adapter_1.ClusterAdapterWithHeartbeat; } });
+Object.defineProperty(exports, "MessageType", { enumerable: true, get: function () { return cluster_adapter_1.MessageType; } });

resources/app/node_modules/socket.io-adapter/node_modules/debug/LICENSE

@@ -0,0 +1,20 @@
+(The MIT License)
+
+Copyright (c) 2014-2017 TJ Holowaychuk <tj@vision-media.ca>
+Copyright (c) 2018-2021 Josh Junon
+
+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.
+

resources/app/node_modules/socket.io-adapter/node_modules/debug/package.json

@@ -0,0 +1,42 @@
+{
+  "name": "debug",
+  "version": "4.3.4",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/debug-js/debug.git"
+  },
+  "description": "Lightweight debugging utility for Node.js and the browser",
+  "files": [
+    "src",
+    "LICENSE",
+    "README.md"
+  ],
+  "author": "Josh Junon <josh.junon@protonmail.com>",
+  "license": "MIT",
+  "dependencies": {
+    "ms": "2.1.2"
+  },
+  "devDependencies": {
+    "brfs": "^2.0.1",
+    "browserify": "^16.2.3",
+    "coveralls": "^3.0.2",
+    "istanbul": "^0.4.5",
+    "karma": "^3.1.4",
+    "karma-browserify": "^6.0.0",
+    "karma-chrome-launcher": "^2.2.0",
+    "karma-mocha": "^1.3.0",
+    "mocha": "^5.2.0",
+    "mocha-lcov-reporter": "^1.2.0",
+    "xo": "^0.23.0"
+  },
+  "peerDependenciesMeta": {
+    "supports-color": {
+      "optional": true
+    }
+  },
+  "main": "./src/index.js",
+  "browser": "./src/browser.js",
+  "engines": {
+    "node": ">=6.0"
+  }
+}

resources/app/node_modules/socket.io-adapter/node_modules/debug/src/browser.js

@@ -0,0 +1,269 @@
+/* eslint-env browser */
+
+/**
+ * This is the web browser implementation of `debug()`.
+ */
+
+exports.formatArgs = formatArgs;
+exports.save = save;
+exports.load = load;
+exports.useColors = useColors;
+exports.storage = localstorage();
+exports.destroy = (() => {
+	let warned = false;
+
+	return () => {
+		if (!warned) {
+			warned = true;
+			console.warn('Instance method `debug.destroy()` is deprecated and no longer does anything. It will be removed in the next major version of `debug`.');
+		}
+	};
+})();
+
+/**
+ * Colors.
+ */
+
+exports.colors = [
+	'#0000CC',
+	'#0000FF',
+	'#0033CC',
+	'#0033FF',
+	'#0066CC',
+	'#0066FF',
+	'#0099CC',
+	'#0099FF',
+	'#00CC00',
+	'#00CC33',
+	'#00CC66',
+	'#00CC99',
+	'#00CCCC',
+	'#00CCFF',
+	'#3300CC',
+	'#3300FF',
+	'#3333CC',
+	'#3333FF',
+	'#3366CC',
+	'#3366FF',
+	'#3399CC',
+	'#3399FF',
+	'#33CC00',
+	'#33CC33',
+	'#33CC66',
+	'#33CC99',
+	'#33CCCC',
+	'#33CCFF',
+	'#6600CC',
+	'#6600FF',
+	'#6633CC',
+	'#6633FF',
+	'#66CC00',
+	'#66CC33',
+	'#9900CC',
+	'#9900FF',
+	'#9933CC',
+	'#9933FF',
+	'#99CC00',
+	'#99CC33',
+	'#CC0000',
+	'#CC0033',
+	'#CC0066',
+	'#CC0099',
+	'#CC00CC',
+	'#CC00FF',
+	'#CC3300',
+	'#CC3333',
+	'#CC3366',
+	'#CC3399',
+	'#CC33CC',
+	'#CC33FF',
+	'#CC6600',
+	'#CC6633',
+	'#CC9900',
+	'#CC9933',
+	'#CCCC00',
+	'#CCCC33',
+	'#FF0000',
+	'#FF0033',
+	'#FF0066',
+	'#FF0099',
+	'#FF00CC',
+	'#FF00FF',
+	'#FF3300',
+	'#FF3333',
+	'#FF3366',
+	'#FF3399',
+	'#FF33CC',
+	'#FF33FF',
+	'#FF6600',
+	'#FF6633',
+	'#FF9900',
+	'#FF9933',
+	'#FFCC00',
+	'#FFCC33'
+];
+
+/**
+ * Currently only WebKit-based Web Inspectors, Firefox >= v31,
+ * and the Firebug extension (any Firefox version) are known
+ * to support "%c" CSS customizations.
+ *
+ * TODO: add a `localStorage` variable to explicitly enable/disable colors
+ */
+
+// eslint-disable-next-line complexity
+function useColors() {
+	// NB: In an Electron preload script, document will be defined but not fully
+	// initialized. Since we know we're in Chrome, we'll just detect this case
+	// explicitly
+	if (typeof window !== 'undefined' && window.process && (window.process.type === 'renderer' || window.process.__nwjs)) {
+		return true;
+	}
+
+	// Internet Explorer and Edge do not support colors.
+	if (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/(edge|trident)\/(\d+)/)) {
+		return false;
+	}
+
+	// Is webkit? http://stackoverflow.com/a/16459606/376773
+	// document is undefined in react-native: https://github.com/facebook/react-native/pull/1632
+	return (typeof document !== 'undefined' && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance) ||
+		// Is firebug? http://stackoverflow.com/a/398120/376773
+		(typeof window !== 'undefined' && window.console && (window.console.firebug || (window.console.exception && window.console.table))) ||
+		// Is firefox >= v31?
+		// https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
+		(typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31) ||
+		// Double check webkit in userAgent just in case we are in a worker
+		(typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\/(\d+)/));
+}
+
+/**
+ * Colorize log arguments if enabled.
+ *
+ * @api public
+ */
+
+function formatArgs(args) {
+	args[0] = (this.useColors ? '%c' : '') +
+		this.namespace +
+		(this.useColors ? ' %c' : ' ') +
+		args[0] +
+		(this.useColors ? '%c ' : ' ') +
+		'+' + module.exports.humanize(this.diff);
+
+	if (!this.useColors) {
+		return;
+	}
+
+	const c = 'color: ' + this.color;
+	args.splice(1, 0, c, 'color: inherit');
+
+	// The final "%c" is somewhat tricky, because there could be other
+	// arguments passed either before or after the %c, so we need to
+	// figure out the correct index to insert the CSS into
+	let index = 0;
+	let lastC = 0;
+	args[0].replace(/%[a-zA-Z%]/g, match => {
+		if (match === '%%') {
+			return;
+		}
+		index++;
+		if (match === '%c') {
+			// We only are interested in the *last* %c
+			// (the user may have provided their own)
+			lastC = index;
+		}
+	});
+
+	args.splice(lastC, 0, c);
+}
+
+/**
+ * Invokes `console.debug()` when available.
+ * No-op when `console.debug` is not a "function".
+ * If `console.debug` is not available, falls back
+ * to `console.log`.
+ *
+ * @api public
+ */
+exports.log = console.debug || console.log || (() => {});
+
+/**
+ * Save `namespaces`.
+ *
+ * @param {String} namespaces
+ * @api private
+ */
+function save(namespaces) {
+	try {
+		if (namespaces) {
+			exports.storage.setItem('debug', namespaces);
+		} else {
+			exports.storage.removeItem('debug');
+		}
+	} catch (error) {
+		// Swallow
+		// XXX (@Qix-) should we be logging these?
+	}
+}
+
+/**
+ * Load `namespaces`.
+ *
+ * @return {String} returns the previously persisted debug modes
+ * @api private
+ */
+function load() {
+	let r;
+	try {
+		r = exports.storage.getItem('debug');
+	} catch (error) {
+		// Swallow
+		// XXX (@Qix-) should we be logging these?
+	}
+
+	// If debug isn't set in LS, and we're in Electron, try to load $DEBUG
+	if (!r && typeof process !== 'undefined' && 'env' in process) {
+		r = process.env.DEBUG;
+	}
+
+	return r;
+}
+
+/**
+ * Localstorage attempts to return the localstorage.
+ *
+ * This is necessary because safari throws
+ * when a user disables cookies/localstorage
+ * and you attempt to access it.
+ *
+ * @return {LocalStorage}
+ * @api private
+ */
+
+function localstorage() {
+	try {
+		// TVMLKit (Apple TV JS Runtime) does not have a window object, just localStorage in the global context
+		// The Browser also has localStorage in the global context.
+		return localStorage;
+	} catch (error) {
+		// Swallow
+		// XXX (@Qix-) should we be logging these?
+	}
+}
+
+module.exports = require('./common')(exports);
+
+const {formatters} = module.exports;
+
+/**
+ * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
+ */
+
+formatters.j = function (v) {
+	try {
+		return JSON.stringify(v);
+	} catch (error) {
+		return '[UnexpectedJSONParseError]: ' + error.message;
+	}
+};

resources/app/node_modules/socket.io-adapter/node_modules/debug/src/common.js

@@ -0,0 +1,274 @@
+
+/**
+ * This is the common logic for both the Node.js and web browser
+ * implementations of `debug()`.
+ */
+
+function setup(env) {
+	createDebug.debug = createDebug;
+	createDebug.default = createDebug;
+	createDebug.coerce = coerce;
+	createDebug.disable = disable;
+	createDebug.enable = enable;
+	createDebug.enabled = enabled;
+	createDebug.humanize = require('ms');
+	createDebug.destroy = destroy;
+
+	Object.keys(env).forEach(key => {
+		createDebug[key] = env[key];
+	});
+
+	/**
+	* The currently active debug mode names, and names to skip.
+	*/
+
+	createDebug.names = [];
+	createDebug.skips = [];
+
+	/**
+	* Map of special "%n" handling functions, for the debug "format" argument.
+	*
+	* Valid key names are a single, lower or upper-case letter, i.e. "n" and "N".
+	*/
+	createDebug.formatters = {};
+
+	/**
+	* Selects a color for a debug namespace
+	* @param {String} namespace The namespace string for the debug instance to be colored
+	* @return {Number|String} An ANSI color code for the given namespace
+	* @api private
+	*/
+	function selectColor(namespace) {
+		let hash = 0;
+
+		for (let i = 0; i < namespace.length; i++) {
+			hash = ((hash << 5) - hash) + namespace.charCodeAt(i);
+			hash |= 0; // Convert to 32bit integer
+		}
+
+		return createDebug.colors[Math.abs(hash) % createDebug.colors.length];
+	}
+	createDebug.selectColor = selectColor;
+
+	/**
+	* Create a debugger with the given `namespace`.
+	*
+	* @param {String} namespace
+	* @return {Function}
+	* @api public
+	*/
+	function createDebug(namespace) {
+		let prevTime;
+		let enableOverride = null;
+		let namespacesCache;
+		let enabledCache;
+
+		function debug(...args) {
+			// Disabled?
+			if (!debug.enabled) {
+				return;
+			}
+
+			const self = debug;
+
+			// Set `diff` timestamp
+			const curr = Number(new Date());
+			const ms = curr - (prevTime || curr);
+			self.diff = ms;
+			self.prev = prevTime;
+			self.curr = curr;
+			prevTime = curr;
+
+			args[0] = createDebug.coerce(args[0]);
+
+			if (typeof args[0] !== 'string') {
+				// Anything else let's inspect with %O
+				args.unshift('%O');
+			}
+
+			// Apply any `formatters` transformations
+			let index = 0;
+			args[0] = args[0].replace(/%([a-zA-Z%])/g, (match, format) => {
+				// If we encounter an escaped % then don't increase the array index
+				if (match === '%%') {
+					return '%';
+				}
+				index++;
+				const formatter = createDebug.formatters[format];
+				if (typeof formatter === 'function') {
+					const val = args[index];
+					match = formatter.call(self, val);
+
+					// Now we need to remove `args[index]` since it's inlined in the `format`
+					args.splice(index, 1);
+					index--;
+				}
+				return match;
+			});
+
+			// Apply env-specific formatting (colors, etc.)
+			createDebug.formatArgs.call(self, args);
+
+			const logFn = self.log || createDebug.log;
+			logFn.apply(self, args);
+		}
+
+		debug.namespace = namespace;
+		debug.useColors = createDebug.useColors();
+		debug.color = createDebug.selectColor(namespace);
+		debug.extend = extend;
+		debug.destroy = createDebug.destroy; // XXX Temporary. Will be removed in the next major release.
+
+		Object.defineProperty(debug, 'enabled', {
+			enumerable: true,
+			configurable: false,
+			get: () => {
+				if (enableOverride !== null) {
+					return enableOverride;
+				}
+				if (namespacesCache !== createDebug.namespaces) {
+					namespacesCache = createDebug.namespaces;
+					enabledCache = createDebug.enabled(namespace);
+				}
+
+				return enabledCache;
+			},
+			set: v => {
+				enableOverride = v;
+			}
+		});
+
+		// Env-specific initialization logic for debug instances
+		if (typeof createDebug.init === 'function') {
+			createDebug.init(debug);
+		}
+
+		return debug;
+	}
+
+	function extend(namespace, delimiter) {
+		const newDebug = createDebug(this.namespace + (typeof delimiter === 'undefined' ? ':' : delimiter) + namespace);
+		newDebug.log = this.log;
+		return newDebug;
+	}
+
+	/**
+	* Enables a debug mode by namespaces. This can include modes
+	* separated by a colon and wildcards.
+	*
+	* @param {String} namespaces
+	* @api public
+	*/
+	function enable(namespaces) {
+		createDebug.save(namespaces);
+		createDebug.namespaces = namespaces;
+
+		createDebug.names = [];
+		createDebug.skips = [];
+
+		let i;
+		const split = (typeof namespaces === 'string' ? namespaces : '').split(/[\s,]+/);
+		const len = split.length;
+
+		for (i = 0; i < len; i++) {
+			if (!split[i]) {
+				// ignore empty strings
+				continue;
+			}
+
+			namespaces = split[i].replace(/\*/g, '.*?');
+
+			if (namespaces[0] === '-') {
+				createDebug.skips.push(new RegExp('^' + namespaces.slice(1) + '$'));
+			} else {
+				createDebug.names.push(new RegExp('^' + namespaces + '$'));
+			}
+		}
+	}
+
+	/**
+	* Disable debug output.
+	*
+	* @return {String} namespaces
+	* @api public
+	*/
+	function disable() {
+		const namespaces = [
+			...createDebug.names.map(toNamespace),
+			...createDebug.skips.map(toNamespace).map(namespace => '-' + namespace)
+		].join(',');
+		createDebug.enable('');
+		return namespaces;
+	}
+
+	/**
+	* Returns true if the given mode name is enabled, false otherwise.
+	*
+	* @param {String} name
+	* @return {Boolean}
+	* @api public
+	*/
+	function enabled(name) {
+		if (name[name.length - 1] === '*') {
+			return true;
+		}
+
+		let i;
+		let len;
+
+		for (i = 0, len = createDebug.skips.length; i < len; i++) {
+			if (createDebug.skips[i].test(name)) {
+				return false;
+			}
+		}
+
+		for (i = 0, len = createDebug.names.length; i < len; i++) {
+			if (createDebug.names[i].test(name)) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	* Convert regexp to namespace
+	*
+	* @param {RegExp} regxep
+	* @return {String} namespace
+	* @api private
+	*/
+	function toNamespace(regexp) {
+		return regexp.toString()
+			.substring(2, regexp.toString().length - 2)
+			.replace(/\.\*\?$/, '*');
+	}
+
+	/**
+	* Coerce `val`.
+	*
+	* @param {Mixed} val
+	* @return {Mixed}
+	* @api private
+	*/
+	function coerce(val) {
+		if (val instanceof Error) {
+			return val.stack || val.message;
+		}
+		return val;
+	}
+
+	/**
+	* XXX DO NOT USE. This is a temporary stub function.
+	* XXX It WILL be removed in the next major release.
+	*/
+	function destroy() {
+		console.warn('Instance method `debug.destroy()` is deprecated and no longer does anything. It will be removed in the next major version of `debug`.');
+	}
+
+	createDebug.enable(createDebug.load());
+
+	return createDebug;
+}
+
+module.exports = setup;

resources/app/node_modules/socket.io-adapter/node_modules/debug/src/index.js

@@ -0,0 +1,10 @@
+/**
+ * Detect Electron renderer / nwjs process, which is node, but we should
+ * treat as a browser.
+ */
+
+if (typeof process === 'undefined' || process.type === 'renderer' || process.browser === true || process.__nwjs) {
+	module.exports = require('./browser.js');
+} else {
+	module.exports = require('./node.js');
+}

resources/app/node_modules/socket.io-adapter/node_modules/debug/src/node.js

@@ -0,0 +1,263 @@
+/**
+ * Module dependencies.
+ */
+
+const tty = require('tty');
+const util = require('util');
+
+/**
+ * This is the Node.js implementation of `debug()`.
+ */
+
+exports.init = init;
+exports.log = log;
+exports.formatArgs = formatArgs;
+exports.save = save;
+exports.load = load;
+exports.useColors = useColors;
+exports.destroy = util.deprecate(
+	() => {},
+	'Instance method `debug.destroy()` is deprecated and no longer does anything. It will be removed in the next major version of `debug`.'
+);
+
+/**
+ * Colors.
+ */
+
+exports.colors = [6, 2, 3, 4, 5, 1];
+
+try {
+	// Optional dependency (as in, doesn't need to be installed, NOT like optionalDependencies in package.json)
+	// eslint-disable-next-line import/no-extraneous-dependencies
+	const supportsColor = require('supports-color');
+
+	if (supportsColor && (supportsColor.stderr || supportsColor).level >= 2) {
+		exports.colors = [
+			20,
+			21,
+			26,
+			27,
+			32,
+			33,
+			38,
+			39,
+			40,
+			41,
+			42,
+			43,
+			44,
+			45,
+			56,
+			57,
+			62,
+			63,
+			68,
+			69,
+			74,
+			75,
+			76,
+			77,
+			78,
+			79,
+			80,
+			81,
+			92,
+			93,
+			98,
+			99,
+			112,
+			113,
+			128,
+			129,
+			134,
+			135,
+			148,
+			149,
+			160,
+			161,
+			162,
+			163,
+			164,
+			165,
+			166,
+			167,
+			168,
+			169,
+			170,
+			171,
+			172,
+			173,
+			178,
+			179,
+			184,
+			185,
+			196,
+			197,
+			198,
+			199,
+			200,
+			201,
+			202,
+			203,
+			204,
+			205,
+			206,
+			207,
+			208,
+			209,
+			214,
+			215,
+			220,
+			221
+		];
+	}
+} catch (error) {
+	// Swallow - we only care if `supports-color` is available; it doesn't have to be.
+}
+
+/**
+ * Build up the default `inspectOpts` object from the environment variables.
+ *
+ *   $ DEBUG_COLORS=no DEBUG_DEPTH=10 DEBUG_SHOW_HIDDEN=enabled node script.js
+ */
+
+exports.inspectOpts = Object.keys(process.env).filter(key => {
+	return /^debug_/i.test(key);
+}).reduce((obj, key) => {
+	// Camel-case
+	const prop = key
+		.substring(6)
+		.toLowerCase()
+		.replace(/_([a-z])/g, (_, k) => {
+			return k.toUpperCase();
+		});
+
+	// Coerce string value into JS value
+	let val = process.env[key];
+	if (/^(yes|on|true|enabled)$/i.test(val)) {
+		val = true;
+	} else if (/^(no|off|false|disabled)$/i.test(val)) {
+		val = false;
+	} else if (val === 'null') {
+		val = null;
+	} else {
+		val = Number(val);
+	}
+
+	obj[prop] = val;
+	return obj;
+}, {});
+
+/**
+ * Is stdout a TTY? Colored output is enabled when `true`.
+ */
+
+function useColors() {
+	return 'colors' in exports.inspectOpts ?
+		Boolean(exports.inspectOpts.colors) :
+		tty.isatty(process.stderr.fd);
+}
+
+/**
+ * Adds ANSI color escape codes if enabled.
+ *
+ * @api public
+ */
+
+function formatArgs(args) {
+	const {namespace: name, useColors} = this;
+
+	if (useColors) {
+		const c = this.color;
+		const colorCode = '\u001B[3' + (c < 8 ? c : '8;5;' + c);
+		const prefix = `  ${colorCode};1m${name} \u001B[0m`;
+
+		args[0] = prefix + args[0].split('\n').join('\n' + prefix);
+		args.push(colorCode + 'm+' + module.exports.humanize(this.diff) + '\u001B[0m');
+	} else {
+		args[0] = getDate() + name + ' ' + args[0];
+	}
+}
+
+function getDate() {
+	if (exports.inspectOpts.hideDate) {
+		return '';
+	}
+	return new Date().toISOString() + ' ';
+}
+
+/**
+ * Invokes `util.format()` with the specified arguments and writes to stderr.
+ */
+
+function log(...args) {
+	return process.stderr.write(util.format(...args) + '\n');
+}
+
+/**
+ * Save `namespaces`.
+ *
+ * @param {String} namespaces
+ * @api private
+ */
+function save(namespaces) {
+	if (namespaces) {
+		process.env.DEBUG = namespaces;
+	} else {
+		// If you set a process.env field to null or undefined, it gets cast to the
+		// string 'null' or 'undefined'. Just delete instead.
+		delete process.env.DEBUG;
+	}
+}
+
+/**
+ * Load `namespaces`.
+ *
+ * @return {String} returns the previously persisted debug modes
+ * @api private
+ */
+
+function load() {
+	return process.env.DEBUG;
+}
+
+/**
+ * Init logic for `debug` instances.
+ *
+ * Create a new `inspectOpts` object in case `useColors` is set
+ * differently for a particular `debug` instance.
+ */
+
+function init(debug) {
+	debug.inspectOpts = {};
+
+	const keys = Object.keys(exports.inspectOpts);
+	for (let i = 0; i < keys.length; i++) {
+		debug.inspectOpts[keys[i]] = exports.inspectOpts[keys[i]];
+	}
+}
+
+module.exports = require('./common')(exports);
+
+const {formatters} = module.exports;
+
+/**
+ * Map %o to `util.inspect()`, all on a single line.
+ */
+
+formatters.o = function (v) {
+	this.inspectOpts.colors = this.useColors;
+	return util.inspect(v, this.inspectOpts)
+		.split('\n')
+		.map(str => str.trim())
+		.join(' ');
+};
+
+/**
+ * Map %O to `util.inspect()`, allowing multiple lines if needed.
+ */
+
+formatters.O = function (v) {
+	this.inspectOpts.colors = this.useColors;
+	return util.inspect(v, this.inspectOpts);
+};

resources/app/node_modules/socket.io-adapter/node_modules/ms/index.js

@@ -0,0 +1,162 @@
+/**
+ * Helpers.
+ */
+
+var s = 1000;
+var m = s * 60;
+var h = m * 60;
+var d = h * 24;
+var w = d * 7;
+var y = d * 365.25;
+
+/**
+ * Parse or format the given `val`.
+ *
+ * Options:
+ *
+ *  - `long` verbose formatting [false]
+ *
+ * @param {String|Number} val
+ * @param {Object} [options]
+ * @throws {Error} throw an error if val is not a non-empty string or a number
+ * @return {String|Number}
+ * @api public
+ */
+
+module.exports = function(val, options) {
+  options = options || {};
+  var type = typeof val;
+  if (type === 'string' && val.length > 0) {
+    return parse(val);
+  } else if (type === 'number' && isFinite(val)) {
+    return options.long ? fmtLong(val) : fmtShort(val);
+  }
+  throw new Error(
+    'val is not a non-empty string or a valid number. val=' +
+      JSON.stringify(val)
+  );
+};
+
+/**
+ * Parse the given `str` and return milliseconds.
+ *
+ * @param {String} str
+ * @return {Number}
+ * @api private
+ */
+
+function parse(str) {
+  str = String(str);
+  if (str.length > 100) {
+    return;
+  }
+  var match = /^(-?(?:\d+)?\.?\d+) *(milliseconds?|msecs?|ms|seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|weeks?|w|years?|yrs?|y)?$/i.exec(
+    str
+  );
+  if (!match) {
+    return;
+  }
+  var n = parseFloat(match[1]);
+  var type = (match[2] || 'ms').toLowerCase();
+  switch (type) {
+    case 'years':
+    case 'year':
+    case 'yrs':
+    case 'yr':
+    case 'y':
+      return n * y;
+    case 'weeks':
+    case 'week':
+    case 'w':
+      return n * w;
+    case 'days':
+    case 'day':
+    case 'd':
+      return n * d;
+    case 'hours':
+    case 'hour':
+    case 'hrs':
+    case 'hr':
+    case 'h':
+      return n * h;
+    case 'minutes':
+    case 'minute':
+    case 'mins':
+    case 'min':
+    case 'm':
+      return n * m;
+    case 'seconds':
+    case 'second':
+    case 'secs':
+    case 'sec':
+    case 's':
+      return n * s;
+    case 'milliseconds':
+    case 'millisecond':
+    case 'msecs':
+    case 'msec':
+    case 'ms':
+      return n;
+    default:
+      return undefined;
+  }
+}
+
+/**
+ * Short format for `ms`.
+ *
+ * @param {Number} ms
+ * @return {String}
+ * @api private
+ */
+
+function fmtShort(ms) {
+  var msAbs = Math.abs(ms);
+  if (msAbs >= d) {
+    return Math.round(ms / d) + 'd';
+  }
+  if (msAbs >= h) {
+    return Math.round(ms / h) + 'h';
+  }
+  if (msAbs >= m) {
+    return Math.round(ms / m) + 'm';
+  }
+  if (msAbs >= s) {
+    return Math.round(ms / s) + 's';
+  }
+  return ms + 'ms';
+}
+
+/**
+ * Long format for `ms`.
+ *
+ * @param {Number} ms
+ * @return {String}
+ * @api private
+ */
+
+function fmtLong(ms) {
+  var msAbs = Math.abs(ms);
+  if (msAbs >= d) {
+    return plural(ms, msAbs, d, 'day');
+  }
+  if (msAbs >= h) {
+    return plural(ms, msAbs, h, 'hour');
+  }
+  if (msAbs >= m) {
+    return plural(ms, msAbs, m, 'minute');
+  }
+  if (msAbs >= s) {
+    return plural(ms, msAbs, s, 'second');
+  }
+  return ms + ' ms';
+}
+
+/**
+ * Pluralization helper.
+ */
+
+function plural(ms, msAbs, n, name) {
+  var isPlural = msAbs >= n * 1.5;
+  return Math.round(ms / n) + ' ' + name + (isPlural ? 's' : '');
+}

resources/app/node_modules/socket.io-adapter/node_modules/ms/license.md

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2016 Zeit, Inc.
+
+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.

resources/app/node_modules/socket.io-adapter/node_modules/ms/package.json

@@ -0,0 +1,25 @@
+{
+  "name": "ms",
+  "version": "2.1.2",
+  "description": "Tiny millisecond conversion utility",
+  "repository": "zeit/ms",
+  "main": "./index",
+  "files": [
+    "index.js"
+  ],
+  "lint-staged": {
+    "*.js": [
+      "npm run lint",
+      "prettier --single-quote --write",
+      "git add"
+    ]
+  },
+  "license": "MIT",
+  "devDependencies": {
+    "eslint": "4.12.1",
+    "expect.js": "0.3.1",
+    "husky": "0.14.3",
+    "lint-staged": "5.0.0",
+    "mocha": "4.0.1"
+  }
+}

resources/app/node_modules/socket.io-adapter/node_modules/ws/LICENSE

@@ -0,0 +1,19 @@
+Copyright (c) 2011 Einar Otto Stangvik <einaros@gmail.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.

resources/app/node_modules/socket.io-adapter/node_modules/ws/browser.js

@@ -0,0 +1,8 @@
+'use strict';
+
+module.exports = function () {
+  throw new Error(
+    'ws does not work in the browser. Browser clients must use the native ' +
+      'WebSocket object'
+  );
+};

resources/app/node_modules/socket.io-adapter/node_modules/ws/index.js

@@ -0,0 +1,13 @@
+'use strict';
+
+const WebSocket = require('./lib/websocket');
+
+WebSocket.createWebSocketStream = require('./lib/stream');
+WebSocket.Server = require('./lib/websocket-server');
+WebSocket.Receiver = require('./lib/receiver');
+WebSocket.Sender = require('./lib/sender');
+
+WebSocket.WebSocket = WebSocket;
+WebSocket.WebSocketServer = WebSocket.Server;
+
+module.exports = WebSocket;

resources/app/node_modules/socket.io-adapter/node_modules/ws/lib/buffer-util.js

@@ -0,0 +1,127 @@
+'use strict';
+
+const { EMPTY_BUFFER } = require('./constants');
+
+/**
+ * Merges an array of buffers into a new buffer.
+ *
+ * @param {Buffer[]} list The array of buffers to concat
+ * @param {Number} totalLength The total length of buffers in the list
+ * @return {Buffer} The resulting buffer
+ * @public
+ */
+function concat(list, totalLength) {
+  if (list.length === 0) return EMPTY_BUFFER;
+  if (list.length === 1) return list[0];
+
+  const target = Buffer.allocUnsafe(totalLength);
+  let offset = 0;
+
+  for (let i = 0; i < list.length; i++) {
+    const buf = list[i];
+    target.set(buf, offset);
+    offset += buf.length;
+  }
+
+  if (offset < totalLength) return target.slice(0, offset);
+
+  return target;
+}
+
+/**
+ * Masks a buffer using the given mask.
+ *
+ * @param {Buffer} source The buffer to mask
+ * @param {Buffer} mask The mask to use
+ * @param {Buffer} output The buffer where to store the result
+ * @param {Number} offset The offset at which to start writing
+ * @param {Number} length The number of bytes to mask.
+ * @public
+ */
+function _mask(source, mask, output, offset, length) {
+  for (let i = 0; i < length; i++) {
+    output[offset + i] = source[i] ^ mask[i & 3];
+  }
+}
+
+/**
+ * Unmasks a buffer using the given mask.
+ *
+ * @param {Buffer} buffer The buffer to unmask
+ * @param {Buffer} mask The mask to use
+ * @public
+ */
+function _unmask(buffer, mask) {
+  for (let i = 0; i < buffer.length; i++) {
+    buffer[i] ^= mask[i & 3];
+  }
+}
+
+/**
+ * Converts a buffer to an `ArrayBuffer`.
+ *
+ * @param {Buffer} buf The buffer to convert
+ * @return {ArrayBuffer} Converted buffer
+ * @public
+ */
+function toArrayBuffer(buf) {
+  if (buf.byteLength === buf.buffer.byteLength) {
+    return buf.buffer;
+  }
+
+  return buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.byteLength);
+}
+
+/**
+ * Converts `data` to a `Buffer`.
+ *
+ * @param {*} data The data to convert
+ * @return {Buffer} The buffer
+ * @throws {TypeError}
+ * @public
+ */
+function toBuffer(data) {
+  toBuffer.readOnly = true;
+
+  if (Buffer.isBuffer(data)) return data;
+
+  let buf;
+
+  if (data instanceof ArrayBuffer) {
+    buf = Buffer.from(data);
+  } else if (ArrayBuffer.isView(data)) {
+    buf = Buffer.from(data.buffer, data.byteOffset, data.byteLength);
+  } else {
+    buf = Buffer.from(data);
+    toBuffer.readOnly = false;
+  }
+
+  return buf;
+}
+
+module.exports = {
+  concat,
+  mask: _mask,
+  toArrayBuffer,
+  toBuffer,
+  unmask: _unmask
+};
+
+/* istanbul ignore else  */
+if (!process.env.WS_NO_BUFFER_UTIL) {
+  try {
+    const bufferUtil = require('bufferutil');
+
+    module.exports.mask = function (source, mask, output, offset, length) {
+      if (length < 48) _mask(source, mask, output, offset, length);
+      else bufferUtil.mask(source, mask, output, offset, length);
+    };
+
+    module.exports.unmask = function (buffer, mask) {
+      if (buffer.length < 32) _unmask(buffer, mask);
+      else bufferUtil.unmask(buffer, mask);
+    };
+  } catch (e) {
+    // Continue regardless of the error.
+  }
+}

resources/app/node_modules/socket.io-adapter/node_modules/ws/lib/constants.js

@@ -0,0 +1,12 @@
+'use strict';
+
+module.exports = {
+  BINARY_TYPES: ['nodebuffer', 'arraybuffer', 'fragments'],
+  EMPTY_BUFFER: Buffer.alloc(0),
+  GUID: '258EAFA5-E914-47DA-95CA-C5AB0DC85B11',
+  kForOnEventAttribute: Symbol('kIsForOnEventAttribute'),
+  kListener: Symbol('kListener'),
+  kStatusCode: Symbol('status-code'),
+  kWebSocket: Symbol('websocket'),
+  NOOP: () => {}
+};

resources/app/node_modules/socket.io-adapter/node_modules/ws/lib/event-target.js

@@ -0,0 +1,292 @@
+'use strict';
+
+const { kForOnEventAttribute, kListener } = require('./constants');
+
+const kCode = Symbol('kCode');
+const kData = Symbol('kData');
+const kError = Symbol('kError');
+const kMessage = Symbol('kMessage');
+const kReason = Symbol('kReason');
+const kTarget = Symbol('kTarget');
+const kType = Symbol('kType');
+const kWasClean = Symbol('kWasClean');
+
+/**
+ * Class representing an event.
+ */
+class Event {
+  /**
+   * Create a new `Event`.
+   *
+   * @param {String} type The name of the event
+   * @throws {TypeError} If the `type` argument is not specified
+   */
+  constructor(type) {
+    this[kTarget] = null;
+    this[kType] = type;
+  }
+
+  /**
+   * @type {*}
+   */
+  get target() {
+    return this[kTarget];
+  }
+
+  /**
+   * @type {String}
+   */
+  get type() {
+    return this[kType];
+  }
+}
+
+Object.defineProperty(Event.prototype, 'target', { enumerable: true });
+Object.defineProperty(Event.prototype, 'type', { enumerable: true });
+
+/**
+ * Class representing a close event.
+ *
+ * @extends Event
+ */
+class CloseEvent extends Event {
+  /**
+   * Create a new `CloseEvent`.
+   *
+   * @param {String} type The name of the event
+   * @param {Object} [options] A dictionary object that allows for setting
+   *     attributes via object members of the same name
+   * @param {Number} [options.code=0] The status code explaining why the
+   *     connection was closed
+   * @param {String} [options.reason=''] A human-readable string explaining why
+   *     the connection was closed
+   * @param {Boolean} [options.wasClean=false] Indicates whether or not the
+   *     connection was cleanly closed
+   */
+  constructor(type, options = {}) {
+    super(type);
+
+    this[kCode] = options.code === undefined ? 0 : options.code;
+    this[kReason] = options.reason === undefined ? '' : options.reason;
+    this[kWasClean] = options.wasClean === undefined ? false : options.wasClean;
+  }
+
+  /**
+   * @type {Number}
+   */
+  get code() {
+    return this[kCode];
+  }
+
+  /**
+   * @type {String}
+   */
+  get reason() {
+    return this[kReason];
+  }
+
+  /**
+   * @type {Boolean}
+   */
+  get wasClean() {
+    return this[kWasClean];
+  }
+}
+
+Object.defineProperty(CloseEvent.prototype, 'code', { enumerable: true });
+Object.defineProperty(CloseEvent.prototype, 'reason', { enumerable: true });
+Object.defineProperty(CloseEvent.prototype, 'wasClean', { enumerable: true });
+
+/**
+ * Class representing an error event.
+ *
+ * @extends Event
+ */
+class ErrorEvent extends Event {
+  /**
+   * Create a new `ErrorEvent`.
+   *
+   * @param {String} type The name of the event
+   * @param {Object} [options] A dictionary object that allows for setting
+   *     attributes via object members of the same name
+   * @param {*} [options.error=null] The error that generated this event
+   * @param {String} [options.message=''] The error message
+   */
+  constructor(type, options = {}) {
+    super(type);
+
+    this[kError] = options.error === undefined ? null : options.error;
+    this[kMessage] = options.message === undefined ? '' : options.message;
+  }
+
+  /**
+   * @type {*}
+   */
+  get error() {
+    return this[kError];
+  }
+
+  /**
+   * @type {String}
+   */
+  get message() {
+    return this[kMessage];
+  }
+}
+
+Object.defineProperty(ErrorEvent.prototype, 'error', { enumerable: true });
+Object.defineProperty(ErrorEvent.prototype, 'message', { enumerable: true });
+
+/**
+ * Class representing a message event.
+ *
+ * @extends Event
+ */
+class MessageEvent extends Event {
+  /**
+   * Create a new `MessageEvent`.
+   *
+   * @param {String} type The name of the event
+   * @param {Object} [options] A dictionary object that allows for setting
+   *     attributes via object members of the same name
+   * @param {*} [options.data=null] The message content
+   */
+  constructor(type, options = {}) {
+    super(type);
+
+    this[kData] = options.data === undefined ? null : options.data;
+  }
+
+  /**
+   * @type {*}
+   */
+  get data() {
+    return this[kData];
+  }
+}
+
+Object.defineProperty(MessageEvent.prototype, 'data', { enumerable: true });
+
+/**
+ * This provides methods for emulating the `EventTarget` interface. It's not
+ * meant to be used directly.
+ *
+ * @mixin
+ */
+const EventTarget = {
+  /**
+   * Register an event listener.
+   *
+   * @param {String} type A string representing the event type to listen for
+   * @param {(Function|Object)} handler The listener to add
+   * @param {Object} [options] An options object specifies characteristics about
+   *     the event listener
+   * @param {Boolean} [options.once=false] A `Boolean` indicating that the
+   *     listener should be invoked at most once after being added. If `true`,
+   *     the listener would be automatically removed when invoked.
+   * @public
+   */
+  addEventListener(type, handler, options = {}) {
+    for (const listener of this.listeners(type)) {
+      if (
+        !options[kForOnEventAttribute] &&
+        listener[kListener] === handler &&
+        !listener[kForOnEventAttribute]
+      ) {
+        return;
+      }
+    }
+
+    let wrapper;
+
+    if (type === 'message') {
+      wrapper = function onMessage(data, isBinary) {
+        const event = new MessageEvent('message', {
+          data: isBinary ? data : data.toString()
+        });
+
+        event[kTarget] = this;
+        callListener(handler, this, event);
+      };
+    } else if (type === 'close') {
+      wrapper = function onClose(code, message) {
+        const event = new CloseEvent('close', {
+          code,
+          reason: message.toString(),
+          wasClean: this._closeFrameReceived && this._closeFrameSent
+        });
+
+        event[kTarget] = this;
+        callListener(handler, this, event);
+      };
+    } else if (type === 'error') {
+      wrapper = function onError(error) {
+        const event = new ErrorEvent('error', {
+          error,
+          message: error.message
+        });
+
+        event[kTarget] = this;
+        callListener(handler, this, event);
+      };
+    } else if (type === 'open') {
+      wrapper = function onOpen() {
+        const event = new Event('open');
+
+        event[kTarget] = this;
+        callListener(handler, this, event);
+      };
+    } else {
+      return;
+    }
+
+    wrapper[kForOnEventAttribute] = !!options[kForOnEventAttribute];
+    wrapper[kListener] = handler;
+
+    if (options.once) {
+      this.once(type, wrapper);
+    } else {
+      this.on(type, wrapper);
+    }
+  },
+
+  /**
+   * Remove an event listener.
+   *
+   * @param {String} type A string representing the event type to remove
+   * @param {(Function|Object)} handler The listener to remove
+   * @public
+   */
+  removeEventListener(type, handler) {
+    for (const listener of this.listeners(type)) {
+      if (listener[kListener] === handler && !listener[kForOnEventAttribute]) {
+        this.removeListener(type, listener);
+        break;
+      }
+    }
+  }
+};
+
+module.exports = {
+  CloseEvent,
+  ErrorEvent,
+  Event,
+  EventTarget,
+  MessageEvent
+};
+
+/**
+ * Call an event listener
+ *
+ * @param {(Function|Object)} listener The listener to call
+ * @param {*} thisArg The value to use as `this`` when calling the listener
+ * @param {Event} event The event to pass to the listener
+ * @private
+ */
+function callListener(listener, thisArg, event) {
+  if (typeof listener === 'object' && listener.handleEvent) {
+    listener.handleEvent.call(listener, event);
+  } else {
+    listener.call(thisArg, event);
+  }
+}

resources/app/node_modules/socket.io-adapter/node_modules/ws/lib/extension.js

@@ -0,0 +1,203 @@
+'use strict';
+
+const { tokenChars } = require('./validation');
+
+/**
+ * Adds an offer to the map of extension offers or a parameter to the map of
+ * parameters.
+ *
+ * @param {Object} dest The map of extension offers or parameters
+ * @param {String} name The extension or parameter name
+ * @param {(Object|Boolean|String)} elem The extension parameters or the
+ *     parameter value
+ * @private
+ */
+function push(dest, name, elem) {
+  if (dest[name] === undefined) dest[name] = [elem];
+  else dest[name].push(elem);
+}
+
+/**
+ * Parses the `Sec-WebSocket-Extensions` header into an object.
+ *
+ * @param {String} header The field value of the header
+ * @return {Object} The parsed object
+ * @public
+ */
+function parse(header) {
+  const offers = Object.create(null);
+  let params = Object.create(null);
+  let mustUnescape = false;
+  let isEscaping = false;
+  let inQuotes = false;
+  let extensionName;
+  let paramName;
+  let start = -1;
+  let code = -1;
+  let end = -1;
+  let i = 0;
+
+  for (; i < header.length; i++) {
+    code = header.charCodeAt(i);
+
+    if (extensionName === undefined) {
+      if (end === -1 && tokenChars[code] === 1) {
+        if (start === -1) start = i;
+      } else if (
+        i !== 0 &&
+        (code === 0x20 /* ' ' */ || code === 0x09) /* '\t' */
+      ) {
+        if (end === -1 && start !== -1) end = i;
+      } else if (code === 0x3b /* ';' */ || code === 0x2c /* ',' */) {
+        if (start === -1) {
+          throw new SyntaxError(`Unexpected character at index ${i}`);
+        }
+
+        if (end === -1) end = i;
+        const name = header.slice(start, end);
+        if (code === 0x2c) {
+          push(offers, name, params);
+          params = Object.create(null);
+        } else {
+          extensionName = name;
+        }
+
+        start = end = -1;
+      } else {
+        throw new SyntaxError(`Unexpected character at index ${i}`);
+      }
+    } else if (paramName === undefined) {
+      if (end === -1 && tokenChars[code] === 1) {
+        if (start === -1) start = i;
+      } else if (code === 0x20 || code === 0x09) {
+        if (end === -1 && start !== -1) end = i;
+      } else if (code === 0x3b || code === 0x2c) {
+        if (start === -1) {
+          throw new SyntaxError(`Unexpected character at index ${i}`);
+        }
+
+        if (end === -1) end = i;
+        push(params, header.slice(start, end), true);
+        if (code === 0x2c) {
+          push(offers, extensionName, params);
+          params = Object.create(null);
+          extensionName = undefined;
+        }
+
+        start = end = -1;
+      } else if (code === 0x3d /* '=' */ && start !== -1 && end === -1) {
+        paramName = header.slice(start, i);
+        start = end = -1;
+      } else {
+        throw new SyntaxError(`Unexpected character at index ${i}`);
+      }
+    } else {
+      //
+      // The value of a quoted-string after unescaping must conform to the
+      // token ABNF, so only token characters are valid.
+      // Ref: https://tools.ietf.org/html/rfc6455#section-9.1
+      //
+      if (isEscaping) {
+        if (tokenChars[code] !== 1) {
+          throw new SyntaxError(`Unexpected character at index ${i}`);
+        }
+        if (start === -1) start = i;
+        else if (!mustUnescape) mustUnescape = true;
+        isEscaping = false;
+      } else if (inQuotes) {
+        if (tokenChars[code] === 1) {
+          if (start === -1) start = i;
+        } else if (code === 0x22 /* '"' */ && start !== -1) {
+          inQuotes = false;
+          end = i;
+        } else if (code === 0x5c /* '\' */) {
+          isEscaping = true;
+        } else {
+          throw new SyntaxError(`Unexpected character at index ${i}`);
+        }
+      } else if (code === 0x22 && header.charCodeAt(i - 1) === 0x3d) {
+        inQuotes = true;
+      } else if (end === -1 && tokenChars[code] === 1) {
+        if (start === -1) start = i;
+      } else if (start !== -1 && (code === 0x20 || code === 0x09)) {
+        if (end === -1) end = i;
+      } else if (code === 0x3b || code === 0x2c) {
+        if (start === -1) {
+          throw new SyntaxError(`Unexpected character at index ${i}`);
+        }
+
+        if (end === -1) end = i;
+        let value = header.slice(start, end);
+        if (mustUnescape) {
+          value = value.replace(/\\/g, '');
+          mustUnescape = false;
+        }
+        push(params, paramName, value);
+        if (code === 0x2c) {
+          push(offers, extensionName, params);
+          params = Object.create(null);
+          extensionName = undefined;
+        }
+
+        paramName = undefined;
+        start = end = -1;
+      } else {
+        throw new SyntaxError(`Unexpected character at index ${i}`);
+      }
+    }
+  }
+
+  if (start === -1 || inQuotes || code === 0x20 || code === 0x09) {
+    throw new SyntaxError('Unexpected end of input');
+  }
+
+  if (end === -1) end = i;
+  const token = header.slice(start, end);
+  if (extensionName === undefined) {
+    push(offers, token, params);
+  } else {
+    if (paramName === undefined) {
+      push(params, token, true);
+    } else if (mustUnescape) {
+      push(params, paramName, token.replace(/\\/g, ''));
+    } else {
+      push(params, paramName, token);
+    }
+    push(offers, extensionName, params);
+  }
+
+  return offers;
+}
+
+/**
+ * Builds the `Sec-WebSocket-Extensions` header field value.
+ *
+ * @param {Object} extensions The map of extensions and parameters to format
+ * @return {String} A string representing the given object
+ * @public
+ */
+function format(extensions) {
+  return Object.keys(extensions)
+    .map((extension) => {
+      let configurations = extensions[extension];
+      if (!Array.isArray(configurations)) configurations = [configurations];
+      return configurations
+        .map((params) => {
+          return [extension]
+            .concat(
+              Object.keys(params).map((k) => {
+                let values = params[k];
+                if (!Array.isArray(values)) values = [values];
+                return values
+                  .map((v) => (v === true ? k : `${k}=${v}`))
+                  .join('; ');
+              })
+            )
+            .join('; ');
+        })
+        .join(', ');
+    })
+    .join(', ');
+}
+
+module.exports = { format, parse };

resources/app/node_modules/socket.io-adapter/node_modules/ws/lib/limiter.js

@@ -0,0 +1,55 @@
+'use strict';
+
+const kDone = Symbol('kDone');
+const kRun = Symbol('kRun');
+
+/**
+ * A very simple job queue with adjustable concurrency. Adapted from
+ * https://github.com/STRML/async-limiter
+ */
+class Limiter {
+  /**
+   * Creates a new `Limiter`.
+   *
+   * @param {Number} [concurrency=Infinity] The maximum number of jobs allowed
+   *     to run concurrently
+   */
+  constructor(concurrency) {
+    this[kDone] = () => {
+      this.pending--;
+      this[kRun]();
+    };
+    this.concurrency = concurrency || Infinity;
+    this.jobs = [];
+    this.pending = 0;
+  }
+
+  /**
+   * Adds a job to the queue.
+   *
+   * @param {Function} job The job to run
+   * @public
+   */
+  add(job) {
+    this.jobs.push(job);
+    this[kRun]();
+  }
+
+  /**
+   * Removes a job from the queue and runs it if possible.
+   *
+   * @private
+   */
+  [kRun]() {
+    if (this.pending === this.concurrency) return;
+
+    if (this.jobs.length) {
+      const job = this.jobs.shift();
+
+      this.pending++;
+      job(this[kDone]);
+    }
+  }
+}
+
+module.exports = Limiter;

resources/app/node_modules/socket.io-adapter/node_modules/ws/lib/permessage-deflate.js

@@ -0,0 +1,511 @@
+'use strict';
+
+const zlib = require('zlib');
+
+const bufferUtil = require('./buffer-util');
+const Limiter = require('./limiter');
+const { kStatusCode } = require('./constants');
+
+const TRAILER = Buffer.from([0x00, 0x00, 0xff, 0xff]);
+const kPerMessageDeflate = Symbol('permessage-deflate');
+const kTotalLength = Symbol('total-length');
+const kCallback = Symbol('callback');
+const kBuffers = Symbol('buffers');
+const kError = Symbol('error');
+
+//
+// We limit zlib concurrency, which prevents severe memory fragmentation
+// as documented in https://github.com/nodejs/node/issues/8871#issuecomment-250915913
+// and https://github.com/websockets/ws/issues/1202
+//
+// Intentionally global; it's the global thread pool that's an issue.
+//
+let zlibLimiter;
+
+/**
+ * permessage-deflate implementation.
+ */
+class PerMessageDeflate {
+  /**
+   * Creates a PerMessageDeflate instance.
+   *
+   * @param {Object} [options] Configuration options
+   * @param {(Boolean|Number)} [options.clientMaxWindowBits] Advertise support
+   *     for, or request, a custom client window size
+   * @param {Boolean} [options.clientNoContextTakeover=false] Advertise/
+   *     acknowledge disabling of client context takeover
+   * @param {Number} [options.concurrencyLimit=10] The number of concurrent
+   *     calls to zlib
+   * @param {(Boolean|Number)} [options.serverMaxWindowBits] Request/confirm the
+   *     use of a custom server window size
+   * @param {Boolean} [options.serverNoContextTakeover=false] Request/accept
+   *     disabling of server context takeover
+   * @param {Number} [options.threshold=1024] Size (in bytes) below which
+   *     messages should not be compressed if context takeover is disabled
+   * @param {Object} [options.zlibDeflateOptions] Options to pass to zlib on
+   *     deflate
+   * @param {Object} [options.zlibInflateOptions] Options to pass to zlib on
+   *     inflate
+   * @param {Boolean} [isServer=false] Create the instance in either server or
+   *     client mode
+   * @param {Number} [maxPayload=0] The maximum allowed message length
+   */
+  constructor(options, isServer, maxPayload) {
+    this._maxPayload = maxPayload | 0;
+    this._options = options || {};
+    this._threshold =
+      this._options.threshold !== undefined ? this._options.threshold : 1024;
+    this._isServer = !!isServer;
+    this._deflate = null;
+    this._inflate = null;
+
+    this.params = null;
+
+    if (!zlibLimiter) {
+      const concurrency =
+        this._options.concurrencyLimit !== undefined
+          ? this._options.concurrencyLimit
+          : 10;
+      zlibLimiter = new Limiter(concurrency);
+    }
+  }
+
+  /**
+   * @type {String}
+   */
+  static get extensionName() {
+    return 'permessage-deflate';
+  }
+
+  /**
+   * Create an extension negotiation offer.
+   *
+   * @return {Object} Extension parameters
+   * @public
+   */
+  offer() {
+    const params = {};
+
+    if (this._options.serverNoContextTakeover) {
+      params.server_no_context_takeover = true;
+    }
+    if (this._options.clientNoContextTakeover) {
+      params.client_no_context_takeover = true;
+    }
+    if (this._options.serverMaxWindowBits) {
+      params.server_max_window_bits = this._options.serverMaxWindowBits;
+    }
+    if (this._options.clientMaxWindowBits) {
+      params.client_max_window_bits = this._options.clientMaxWindowBits;
+    } else if (this._options.clientMaxWindowBits == null) {
+      params.client_max_window_bits = true;
+    }
+
+    return params;
+  }
+
+  /**
+   * Accept an extension negotiation offer/response.
+   *
+   * @param {Array} configurations The extension negotiation offers/reponse
+   * @return {Object} Accepted configuration
+   * @public
+   */
+  accept(configurations) {
+    configurations = this.normalizeParams(configurations);
+
+    this.params = this._isServer
+      ? this.acceptAsServer(configurations)
+      : this.acceptAsClient(configurations);
+
+    return this.params;
+  }
+
+  /**
+   * Releases all resources used by the extension.
+   *
+   * @public
+   */
+  cleanup() {
+    if (this._inflate) {
+      this._inflate.close();
+      this._inflate = null;
+    }
+
+    if (this._deflate) {
+      const callback = this._deflate[kCallback];
+
+      this._deflate.close();
+      this._deflate = null;
+
+      if (callback) {
+        callback(
+          new Error(
+            'The deflate stream was closed while data was being processed'
+          )
+        );
+      }
+    }
+  }
+
+  /**
+   *  Accept an extension negotiation offer.
+   *
+   * @param {Array} offers The extension negotiation offers
+   * @return {Object} Accepted configuration
+   * @private
+   */
+  acceptAsServer(offers) {
+    const opts = this._options;
+    const accepted = offers.find((params) => {
+      if (
+        (opts.serverNoContextTakeover === false &&
+          params.server_no_context_takeover) ||
+        (params.server_max_window_bits &&
+          (opts.serverMaxWindowBits === false ||
+            (typeof opts.serverMaxWindowBits === 'number' &&
+              opts.serverMaxWindowBits > params.server_max_window_bits))) ||
+        (typeof opts.clientMaxWindowBits === 'number' &&
+          !params.client_max_window_bits)
+      ) {
+        return false;
+      }
+
+      return true;
+    });
+
+    if (!accepted) {
+      throw new Error('None of the extension offers can be accepted');
+    }
+
+    if (opts.serverNoContextTakeover) {
+      accepted.server_no_context_takeover = true;
+    }
+    if (opts.clientNoContextTakeover) {
+      accepted.client_no_context_takeover = true;
+    }
+    if (typeof opts.serverMaxWindowBits === 'number') {
+      accepted.server_max_window_bits = opts.serverMaxWindowBits;
+    }
+    if (typeof opts.clientMaxWindowBits === 'number') {
+      accepted.client_max_window_bits = opts.clientMaxWindowBits;
+    } else if (
+      accepted.client_max_window_bits === true ||
+      opts.clientMaxWindowBits === false
+    ) {
+      delete accepted.client_max_window_bits;
+    }
+
+    return accepted;
+  }
+
+  /**
+   * Accept the extension negotiation response.
+   *
+   * @param {Array} response The extension negotiation response
+   * @return {Object} Accepted configuration
+   * @private
+   */
+  acceptAsClient(response) {
+    const params = response[0];
+
+    if (
+      this._options.clientNoContextTakeover === false &&
+      params.client_no_context_takeover
+    ) {
+      throw new Error('Unexpected parameter "client_no_context_takeover"');
+    }
+
+    if (!params.client_max_window_bits) {
+      if (typeof this._options.clientMaxWindowBits === 'number') {
+        params.client_max_window_bits = this._options.clientMaxWindowBits;
+      }
+    } else if (
+      this._options.clientMaxWindowBits === false ||
+      (typeof this._options.clientMaxWindowBits === 'number' &&
+        params.client_max_window_bits > this._options.clientMaxWindowBits)
+    ) {
+      throw new Error(
+        'Unexpected or invalid parameter "client_max_window_bits"'
+      );
+    }
+
+    return params;
+  }
+
+  /**
+   * Normalize parameters.
+   *
+   * @param {Array} configurations The extension negotiation offers/reponse
+   * @return {Array} The offers/response with normalized parameters
+   * @private
+   */
+  normalizeParams(configurations) {
+    configurations.forEach((params) => {
+      Object.keys(params).forEach((key) => {
+        let value = params[key];
+
+        if (value.length > 1) {
+          throw new Error(`Parameter "${key}" must have only a single value`);
+        }
+
+        value = value[0];
+
+        if (key === 'client_max_window_bits') {
+          if (value !== true) {
+            const num = +value;
+            if (!Number.isInteger(num) || num < 8 || num > 15) {
+              throw new TypeError(
+                `Invalid value for parameter "${key}": ${value}`
+              );
+            }
+            value = num;
+          } else if (!this._isServer) {
+            throw new TypeError(
+              `Invalid value for parameter "${key}": ${value}`
+            );
+          }
+        } else if (key === 'server_max_window_bits') {
+          const num = +value;
+          if (!Number.isInteger(num) || num < 8 || num > 15) {
+            throw new TypeError(
+              `Invalid value for parameter "${key}": ${value}`
+            );
+          }
+          value = num;
+        } else if (
+          key === 'client_no_context_takeover' ||
+          key === 'server_no_context_takeover'
+        ) {
+          if (value !== true) {
+            throw new TypeError(
+              `Invalid value for parameter "${key}": ${value}`
+            );
+          }
+        } else {
+          throw new Error(`Unknown parameter "${key}"`);
+        }
+
+        params[key] = value;
+      });
+    });
+
+    return configurations;
+  }
+
+  /**
+   * Decompress data. Concurrency limited.
+   *
+   * @param {Buffer} data Compressed data
+   * @param {Boolean} fin Specifies whether or not this is the last fragment
+   * @param {Function} callback Callback
+   * @public
+   */
+  decompress(data, fin, callback) {
+    zlibLimiter.add((done) => {
+      this._decompress(data, fin, (err, result) => {
+        done();
+        callback(err, result);
+      });
+    });
+  }
+
+  /**
+   * Compress data. Concurrency limited.
+   *
+   * @param {(Buffer|String)} data Data to compress
+   * @param {Boolean} fin Specifies whether or not this is the last fragment
+   * @param {Function} callback Callback
+   * @public
+   */
+  compress(data, fin, callback) {
+    zlibLimiter.add((done) => {
+      this._compress(data, fin, (err, result) => {
+        done();
+        callback(err, result);
+      });
+    });
+  }
+
+  /**
+   * Decompress data.
+   *
+   * @param {Buffer} data Compressed data
+   * @param {Boolean} fin Specifies whether or not this is the last fragment
+   * @param {Function} callback Callback
+   * @private
+   */
+  _decompress(data, fin, callback) {
+    const endpoint = this._isServer ? 'client' : 'server';
+
+    if (!this._inflate) {
+      const key = `${endpoint}_max_window_bits`;
+      const windowBits =
+        typeof this.params[key] !== 'number'
+          ? zlib.Z_DEFAULT_WINDOWBITS
+          : this.params[key];
+
+      this._inflate = zlib.createInflateRaw({
+        ...this._options.zlibInflateOptions,
+        windowBits
+      });
+      this._inflate[kPerMessageDeflate] = this;
+      this._inflate[kTotalLength] = 0;
+      this._inflate[kBuffers] = [];
+      this._inflate.on('error', inflateOnError);
+      this._inflate.on('data', inflateOnData);
+    }
+
+    this._inflate[kCallback] = callback;
+
+    this._inflate.write(data);
+    if (fin) this._inflate.write(TRAILER);
+
+    this._inflate.flush(() => {
+      const err = this._inflate[kError];
+
+      if (err) {
+        this._inflate.close();
+        this._inflate = null;
+        callback(err);
+        return;
+      }
+
+      const data = bufferUtil.concat(
+        this._inflate[kBuffers],
+        this._inflate[kTotalLength]
+      );
+
+      if (this._inflate._readableState.endEmitted) {
+        this._inflate.close();
+        this._inflate = null;
+      } else {
+        this._inflate[kTotalLength] = 0;
+        this._inflate[kBuffers] = [];
+
+        if (fin && this.params[`${endpoint}_no_context_takeover`]) {
+          this._inflate.reset();
+        }
+      }
+
+      callback(null, data);
+    });
+  }
+
+  /**
+   * Compress data.
+   *
+   * @param {(Buffer|String)} data Data to compress
+   * @param {Boolean} fin Specifies whether or not this is the last fragment
+   * @param {Function} callback Callback
+   * @private
+   */
+  _compress(data, fin, callback) {
+    const endpoint = this._isServer ? 'server' : 'client';
+
+    if (!this._deflate) {
+      const key = `${endpoint}_max_window_bits`;
+      const windowBits =
+        typeof this.params[key] !== 'number'
+          ? zlib.Z_DEFAULT_WINDOWBITS
+          : this.params[key];
+
+      this._deflate = zlib.createDeflateRaw({
+        ...this._options.zlibDeflateOptions,
+        windowBits
+      });
+
+      this._deflate[kTotalLength] = 0;
+      this._deflate[kBuffers] = [];
+
+      this._deflate.on('data', deflateOnData);
+    }
+
+    this._deflate[kCallback] = callback;
+
+    this._deflate.write(data);
+    this._deflate.flush(zlib.Z_SYNC_FLUSH, () => {
+      if (!this._deflate) {
+        //
+        // The deflate stream was closed while data was being processed.
+        //
+        return;
+      }
+
+      let data = bufferUtil.concat(
+        this._deflate[kBuffers],
+        this._deflate[kTotalLength]
+      );
+
+      if (fin) data = data.slice(0, data.length - 4);
+
+      //
+      // Ensure that the callback will not be called again in
+      // `PerMessageDeflate#cleanup()`.
+      //
+      this._deflate[kCallback] = null;
+
+      this._deflate[kTotalLength] = 0;
+      this._deflate[kBuffers] = [];
+
+      if (fin && this.params[`${endpoint}_no_context_takeover`]) {
+        this._deflate.reset();
+      }
+
+      callback(null, data);
+    });
+  }
+}
+
+module.exports = PerMessageDeflate;
+
+/**
+ * The listener of the `zlib.DeflateRaw` stream `'data'` event.
+ *
+ * @param {Buffer} chunk A chunk of data
+ * @private
+ */
+function deflateOnData(chunk) {
+  this[kBuffers].push(chunk);
+  this[kTotalLength] += chunk.length;
+}
+
+/**
+ * The listener of the `zlib.InflateRaw` stream `'data'` event.
+ *
+ * @param {Buffer} chunk A chunk of data
+ * @private
+ */
+function inflateOnData(chunk) {
+  this[kTotalLength] += chunk.length;
+
+  if (
+    this[kPerMessageDeflate]._maxPayload < 1 ||
+    this[kTotalLength] <= this[kPerMessageDeflate]._maxPayload
+  ) {
+    this[kBuffers].push(chunk);
+    return;
+  }
+
+  this[kError] = new RangeError('Max payload size exceeded');
+  this[kError].code = 'WS_ERR_UNSUPPORTED_MESSAGE_LENGTH';
+  this[kError][kStatusCode] = 1009;
+  this.removeListener('data', inflateOnData);
+  this.reset();
+}
+
+/**
+ * The listener of the `zlib.InflateRaw` stream `'error'` event.
+ *
+ * @param {Error} err The emitted error
+ * @private
+ */
+function inflateOnError(err) {
+  //
+  // There is no need to call `Zlib#close()` as the handle is automatically
+  // closed when an error is emitted.
+  //
+  this[kPerMessageDeflate]._inflate = null;
+  err[kStatusCode] = 1007;
+  this[kCallback](err);
+}

resources/app/node_modules/socket.io-adapter/node_modules/ws/lib/receiver.js

@@ -0,0 +1,618 @@
+'use strict';
+
+const { Writable } = require('stream');
+
+const PerMessageDeflate = require('./permessage-deflate');
+const {
+  BINARY_TYPES,
+  EMPTY_BUFFER,
+  kStatusCode,
+  kWebSocket
+} = require('./constants');
+const { concat, toArrayBuffer, unmask } = require('./buffer-util');
+const { isValidStatusCode, isValidUTF8 } = require('./validation');
+
+const GET_INFO = 0;
+const GET_PAYLOAD_LENGTH_16 = 1;
+const GET_PAYLOAD_LENGTH_64 = 2;
+const GET_MASK = 3;
+const GET_DATA = 4;
+const INFLATING = 5;
+
+/**
+ * HyBi Receiver implementation.
+ *
+ * @extends Writable
+ */
+class Receiver extends Writable {
+  /**
+   * Creates a Receiver instance.
+   *
+   * @param {Object} [options] Options object
+   * @param {String} [options.binaryType=nodebuffer] The type for binary data
+   * @param {Object} [options.extensions] An object containing the negotiated
+   *     extensions
+   * @param {Boolean} [options.isServer=false] Specifies whether to operate in
+   *     client or server mode
+   * @param {Number} [options.maxPayload=0] The maximum allowed message length
+   * @param {Boolean} [options.skipUTF8Validation=false] Specifies whether or
+   *     not to skip UTF-8 validation for text and close messages
+   */
+  constructor(options = {}) {
+    super();
+
+    this._binaryType = options.binaryType || BINARY_TYPES[0];
+    this._extensions = options.extensions || {};
+    this._isServer = !!options.isServer;
+    this._maxPayload = options.maxPayload | 0;
+    this._skipUTF8Validation = !!options.skipUTF8Validation;
+    this[kWebSocket] = undefined;
+
+    this._bufferedBytes = 0;
+    this._buffers = [];
+
+    this._compressed = false;
+    this._payloadLength = 0;
+    this._mask = undefined;
+    this._fragmented = 0;
+    this._masked = false;
+    this._fin = false;
+    this._opcode = 0;
+
+    this._totalPayloadLength = 0;
+    this._messageLength = 0;
+    this._fragments = [];
+
+    this._state = GET_INFO;
+    this._loop = false;
+  }
+
+  /**
+   * Implements `Writable.prototype._write()`.
+   *
+   * @param {Buffer} chunk The chunk of data to write
+   * @param {String} encoding The character encoding of `chunk`
+   * @param {Function} cb Callback
+   * @private
+   */
+  _write(chunk, encoding, cb) {
+    if (this._opcode === 0x08 && this._state == GET_INFO) return cb();
+
+    this._bufferedBytes += chunk.length;
+    this._buffers.push(chunk);
+    this.startLoop(cb);
+  }
+
+  /**
+   * Consumes `n` bytes from the buffered data.
+   *
+   * @param {Number} n The number of bytes to consume
+   * @return {Buffer} The consumed bytes
+   * @private
+   */
+  consume(n) {
+    this._bufferedBytes -= n;
+
+    if (n === this._buffers[0].length) return this._buffers.shift();
+
+    if (n < this._buffers[0].length) {
+      const buf = this._buffers[0];
+      this._buffers[0] = buf.slice(n);
+      return buf.slice(0, n);
+    }
+
+    const dst = Buffer.allocUnsafe(n);
+
+    do {
+      const buf = this._buffers[0];
+      const offset = dst.length - n;
+
+      if (n >= buf.length) {
+        dst.set(this._buffers.shift(), offset);
+      } else {
+        dst.set(new Uint8Array(buf.buffer, buf.byteOffset, n), offset);
+        this._buffers[0] = buf.slice(n);
+      }
+
+      n -= buf.length;
+    } while (n > 0);
+
+    return dst;
+  }
+
+  /**
+   * Starts the parsing loop.
+   *
+   * @param {Function} cb Callback
+   * @private
+   */
+  startLoop(cb) {
+    let err;
+    this._loop = true;
+
+    do {
+      switch (this._state) {
+        case GET_INFO:
+          err = this.getInfo();
+          break;
+        case GET_PAYLOAD_LENGTH_16:
+          err = this.getPayloadLength16();
+          break;
+        case GET_PAYLOAD_LENGTH_64:
+          err = this.getPayloadLength64();
+          break;
+        case GET_MASK:
+          this.getMask();
+          break;
+        case GET_DATA:
+          err = this.getData(cb);
+          break;
+        default:
+          // `INFLATING`
+          this._loop = false;
+          return;
+      }
+    } while (this._loop);
+
+    cb(err);
+  }
+
+  /**
+   * Reads the first two bytes of a frame.
+   *
+   * @return {(RangeError|undefined)} A possible error
+   * @private
+   */
+  getInfo() {
+    if (this._bufferedBytes < 2) {
+      this._loop = false;
+      return;
+    }
+
+    const buf = this.consume(2);
+
+    if ((buf[0] & 0x30) !== 0x00) {
+      this._loop = false;
+      return error(
+        RangeError,
+        'RSV2 and RSV3 must be clear',
+        true,
+        1002,
+        'WS_ERR_UNEXPECTED_RSV_2_3'
+      );
+    }
+
+    const compressed = (buf[0] & 0x40) === 0x40;
+
+    if (compressed && !this._extensions[PerMessageDeflate.extensionName]) {
+      this._loop = false;
+      return error(
+        RangeError,
+        'RSV1 must be clear',
+        true,
+        1002,
+        'WS_ERR_UNEXPECTED_RSV_1'
+      );
+    }
+
+    this._fin = (buf[0] & 0x80) === 0x80;
+    this._opcode = buf[0] & 0x0f;
+    this._payloadLength = buf[1] & 0x7f;
+
+    if (this._opcode === 0x00) {
+      if (compressed) {
+        this._loop = false;
+        return error(
+          RangeError,
+          'RSV1 must be clear',
+          true,
+          1002,
+          'WS_ERR_UNEXPECTED_RSV_1'
+        );
+      }
+
+      if (!this._fragmented) {
+        this._loop = false;
+        return error(
+          RangeError,
+          'invalid opcode 0',
+          true,
+          1002,
+          'WS_ERR_INVALID_OPCODE'
+        );
+      }
+
+      this._opcode = this._fragmented;
+    } else if (this._opcode === 0x01 || this._opcode === 0x02) {
+      if (this._fragmented) {
+        this._loop = false;
+        return error(
+          RangeError,
+          `invalid opcode ${this._opcode}`,
+          true,
+          1002,
+          'WS_ERR_INVALID_OPCODE'
+        );
+      }
+
+      this._compressed = compressed;
+    } else if (this._opcode > 0x07 && this._opcode < 0x0b) {
+      if (!this._fin) {
+        this._loop = false;
+        return error(
+          RangeError,
+          'FIN must be set',
+          true,
+          1002,
+          'WS_ERR_EXPECTED_FIN'
+        );
+      }
+
+      if (compressed) {
+        this._loop = false;
+        return error(
+          RangeError,
+          'RSV1 must be clear',
+          true,
+          1002,
+          'WS_ERR_UNEXPECTED_RSV_1'
+        );
+      }
+
+      if (this._payloadLength > 0x7d) {
+        this._loop = false;
+        return error(
+          RangeError,
+          `invalid payload length ${this._payloadLength}`,
+          true,
+          1002,
+          'WS_ERR_INVALID_CONTROL_PAYLOAD_LENGTH'
+        );
+      }
+    } else {
+      this._loop = false;
+      return error(
+        RangeError,
+        `invalid opcode ${this._opcode}`,
+        true,
+        1002,
+        'WS_ERR_INVALID_OPCODE'
+      );
+    }
+
+    if (!this._fin && !this._fragmented) this._fragmented = this._opcode;
+    this._masked = (buf[1] & 0x80) === 0x80;
+
+    if (this._isServer) {
+      if (!this._masked) {
+        this._loop = false;
+        return error(
+          RangeError,
+          'MASK must be set',
+          true,
+          1002,
+          'WS_ERR_EXPECTED_MASK'
+        );
+      }
+    } else if (this._masked) {
+      this._loop = false;
+      return error(
+        RangeError,
+        'MASK must be clear',
+        true,
+        1002,
+        'WS_ERR_UNEXPECTED_MASK'
+      );
+    }
+
+    if (this._payloadLength === 126) this._state = GET_PAYLOAD_LENGTH_16;
+    else if (this._payloadLength === 127) this._state = GET_PAYLOAD_LENGTH_64;
+    else return this.haveLength();
+  }
+
+  /**
+   * Gets extended payload length (7+16).
+   *
+   * @return {(RangeError|undefined)} A possible error
+   * @private
+   */
+  getPayloadLength16() {
+    if (this._bufferedBytes < 2) {
+      this._loop = false;
+      return;
+    }
+
+    this._payloadLength = this.consume(2).readUInt16BE(0);
+    return this.haveLength();
+  }
+
+  /**
+   * Gets extended payload length (7+64).
+   *
+   * @return {(RangeError|undefined)} A possible error
+   * @private
+   */
+  getPayloadLength64() {
+    if (this._bufferedBytes < 8) {
+      this._loop = false;
+      return;
+    }
+
+    const buf = this.consume(8);
+    const num = buf.readUInt32BE(0);
+
+    //
+    // The maximum safe integer in JavaScript is 2^53 - 1. An error is returned
+    // if payload length is greater than this number.
+    //
+    if (num > Math.pow(2, 53 - 32) - 1) {
+      this._loop = false;
+      return error(
+        RangeError,
+        'Unsupported WebSocket frame: payload length > 2^53 - 1',
+        false,
+        1009,
+        'WS_ERR_UNSUPPORTED_DATA_PAYLOAD_LENGTH'
+      );
+    }
+
+    this._payloadLength = num * Math.pow(2, 32) + buf.readUInt32BE(4);
+    return this.haveLength();
+  }
+
+  /**
+   * Payload length has been read.
+   *
+   * @return {(RangeError|undefined)} A possible error
+   * @private
+   */
+  haveLength() {
+    if (this._payloadLength && this._opcode < 0x08) {
+      this._totalPayloadLength += this._payloadLength;
+      if (this._totalPayloadLength > this._maxPayload && this._maxPayload > 0) {
+        this._loop = false;
+        return error(
+          RangeError,
+          'Max payload size exceeded',
+          false,
+          1009,
+          'WS_ERR_UNSUPPORTED_MESSAGE_LENGTH'
+        );
+      }
+    }
+
+    if (this._masked) this._state = GET_MASK;
+    else this._state = GET_DATA;
+  }
+
+  /**
+   * Reads mask bytes.
+   *
+   * @private
+   */
+  getMask() {
+    if (this._bufferedBytes < 4) {
+      this._loop = false;
+      return;
+    }
+
+    this._mask = this.consume(4);
+    this._state = GET_DATA;
+  }
+
+  /**
+   * Reads data bytes.
+   *
+   * @param {Function} cb Callback
+   * @return {(Error|RangeError|undefined)} A possible error
+   * @private
+   */
+  getData(cb) {
+    let data = EMPTY_BUFFER;
+
+    if (this._payloadLength) {
+      if (this._bufferedBytes < this._payloadLength) {
+        this._loop = false;
+        return;
+      }
+
+      data = this.consume(this._payloadLength);
+
+      if (
+        this._masked &&
+        (this._mask[0] | this._mask[1] | this._mask[2] | this._mask[3]) !== 0
+      ) {
+        unmask(data, this._mask);
+      }
+    }
+
+    if (this._opcode > 0x07) return this.controlMessage(data);
+
+    if (this._compressed) {
+      this._state = INFLATING;
+      this.decompress(data, cb);
+      return;
+    }
+
+    if (data.length) {
+      //
+      // This message is not compressed so its length is the sum of the payload
+      // length of all fragments.
+      //
+      this._messageLength = this._totalPayloadLength;
+      this._fragments.push(data);
+    }
+
+    return this.dataMessage();
+  }
+
+  /**
+   * Decompresses data.
+   *
+   * @param {Buffer} data Compressed data
+   * @param {Function} cb Callback
+   * @private
+   */
+  decompress(data, cb) {
+    const perMessageDeflate = this._extensions[PerMessageDeflate.extensionName];
+
+    perMessageDeflate.decompress(data, this._fin, (err, buf) => {
+      if (err) return cb(err);
+
+      if (buf.length) {
+        this._messageLength += buf.length;
+        if (this._messageLength > this._maxPayload && this._maxPayload > 0) {
+          return cb(
+            error(
+              RangeError,
+              'Max payload size exceeded',
+              false,
+              1009,
+              'WS_ERR_UNSUPPORTED_MESSAGE_LENGTH'
+            )
+          );
+        }
+
+        this._fragments.push(buf);
+      }
+
+      const er = this.dataMessage();
+      if (er) return cb(er);
+
+      this.startLoop(cb);
+    });
+  }
+
+  /**
+   * Handles a data message.
+   *
+   * @return {(Error|undefined)} A possible error
+   * @private
+   */
+  dataMessage() {
+    if (this._fin) {
+      const messageLength = this._messageLength;
+      const fragments = this._fragments;
+
+      this._totalPayloadLength = 0;
+      this._messageLength = 0;
+      this._fragmented = 0;
+      this._fragments = [];
+
+      if (this._opcode === 2) {
+        let data;
+
+        if (this._binaryType === 'nodebuffer') {
+          data = concat(fragments, messageLength);
+        } else if (this._binaryType === 'arraybuffer') {
+          data = toArrayBuffer(concat(fragments, messageLength));
+        } else {
+          data = fragments;
+        }
+
+        this.emit('message', data, true);
+      } else {
+        const buf = concat(fragments, messageLength);
+
+        if (!this._skipUTF8Validation && !isValidUTF8(buf)) {
+          this._loop = false;
+          return error(
+            Error,
+            'invalid UTF-8 sequence',
+            true,
+            1007,
+            'WS_ERR_INVALID_UTF8'
+          );
+        }
+
+        this.emit('message', buf, false);
+      }
+    }
+
+    this._state = GET_INFO;
+  }
+
+  /**
+   * Handles a control message.
+   *
+   * @param {Buffer} data Data to handle
+   * @return {(Error|RangeError|undefined)} A possible error
+   * @private
+   */
+  controlMessage(data) {
+    if (this._opcode === 0x08) {
+      this._loop = false;
+
+      if (data.length === 0) {
+        this.emit('conclude', 1005, EMPTY_BUFFER);
+        this.end();
+      } else if (data.length === 1) {
+        return error(
+          RangeError,
+          'invalid payload length 1',
+          true,
+          1002,
+          'WS_ERR_INVALID_CONTROL_PAYLOAD_LENGTH'
+        );
+      } else {
+        const code = data.readUInt16BE(0);
+
+        if (!isValidStatusCode(code)) {
+          return error(
+            RangeError,
+            `invalid status code ${code}`,
+            true,
+            1002,
+            'WS_ERR_INVALID_CLOSE_CODE'
+          );
+        }
+
+        const buf = data.slice(2);
+
+        if (!this._skipUTF8Validation && !isValidUTF8(buf)) {
+          return error(
+            Error,
+            'invalid UTF-8 sequence',
+            true,
+            1007,
+            'WS_ERR_INVALID_UTF8'
+          );
+        }
+
+        this.emit('conclude', code, buf);
+        this.end();
+      }
+    } else if (this._opcode === 0x09) {
+      this.emit('ping', data);
+    } else {
+      this.emit('pong', data);
+    }
+
+    this._state = GET_INFO;
+  }
+}
+
+module.exports = Receiver;
+
+/**
+ * Builds an error object.
+ *
+ * @param {function(new:Error|RangeError)} ErrorCtor The error constructor
+ * @param {String} message The error message
+ * @param {Boolean} prefix Specifies whether or not to add a default prefix to
+ *     `message`
+ * @param {Number} statusCode The status code
+ * @param {String} errorCode The exposed error code
+ * @return {(Error|RangeError)} The error
+ * @private
+ */
+function error(ErrorCtor, message, prefix, statusCode, errorCode) {
+  const err = new ErrorCtor(
+    prefix ? `Invalid WebSocket frame: ${message}` : message
+  );
+
+  Error.captureStackTrace(err, error);
+  err.code = errorCode;
+  err[kStatusCode] = statusCode;
+  return err;
+}

resources/app/node_modules/socket.io-adapter/node_modules/ws/lib/sender.js

@@ -0,0 +1,478 @@
+/* eslint no-unused-vars: ["error", { "varsIgnorePattern": "^net|tls$" }] */
+
+'use strict';
+
+const net = require('net');
+const tls = require('tls');
+const { randomFillSync } = require('crypto');
+
+const PerMessageDeflate = require('./permessage-deflate');
+const { EMPTY_BUFFER } = require('./constants');
+const { isValidStatusCode } = require('./validation');
+const { mask: applyMask, toBuffer } = require('./buffer-util');
+
+const kByteLength = Symbol('kByteLength');
+const maskBuffer = Buffer.alloc(4);
+
+/**
+ * HyBi Sender implementation.
+ */
+class Sender {
+  /**
+   * Creates a Sender instance.
+   *
+   * @param {(net.Socket|tls.Socket)} socket The connection socket
+   * @param {Object} [extensions] An object containing the negotiated extensions
+   * @param {Function} [generateMask] The function used to generate the masking
+   *     key
+   */
+  constructor(socket, extensions, generateMask) {
+    this._extensions = extensions || {};
+
+    if (generateMask) {
+      this._generateMask = generateMask;
+      this._maskBuffer = Buffer.alloc(4);
+    }
+
+    this._socket = socket;
+
+    this._firstFragment = true;
+    this._compress = false;
+
+    this._bufferedBytes = 0;
+    this._deflating = false;
+    this._queue = [];
+  }
+
+  /**
+   * Frames a piece of data according to the HyBi WebSocket protocol.
+   *
+   * @param {(Buffer|String)} data The data to frame
+   * @param {Object} options Options object
+   * @param {Boolean} [options.fin=false] Specifies whether or not to set the
+   *     FIN bit
+   * @param {Function} [options.generateMask] The function used to generate the
+   *     masking key
+   * @param {Boolean} [options.mask=false] Specifies whether or not to mask
+   *     `data`
+   * @param {Buffer} [options.maskBuffer] The buffer used to store the masking
+   *     key
+   * @param {Number} options.opcode The opcode
+   * @param {Boolean} [options.readOnly=false] Specifies whether `data` can be
+   *     modified
+   * @param {Boolean} [options.rsv1=false] Specifies whether or not to set the
+   *     RSV1 bit
+   * @return {(Buffer|String)[]} The framed data
+   * @public
+   */
+  static frame(data, options) {
+    let mask;
+    let merge = false;
+    let offset = 2;
+    let skipMasking = false;
+
+    if (options.mask) {
+      mask = options.maskBuffer || maskBuffer;
+
+      if (options.generateMask) {
+        options.generateMask(mask);
+      } else {
+        randomFillSync(mask, 0, 4);
+      }
+
+      skipMasking = (mask[0] | mask[1] | mask[2] | mask[3]) === 0;
+      offset = 6;
+    }
+
+    let dataLength;
+
+    if (typeof data === 'string') {
+      if (
+        (!options.mask || skipMasking) &&
+        options[kByteLength] !== undefined
+      ) {
+        dataLength = options[kByteLength];
+      } else {
+        data = Buffer.from(data);
+        dataLength = data.length;
+      }
+    } else {
+      dataLength = data.length;
+      merge = options.mask && options.readOnly && !skipMasking;
+    }
+
+    let payloadLength = dataLength;
+
+    if (dataLength >= 65536) {
+      offset += 8;
+      payloadLength = 127;
+    } else if (dataLength > 125) {
+      offset += 2;
+      payloadLength = 126;
+    }
+
+    const target = Buffer.allocUnsafe(merge ? dataLength + offset : offset);
+
+    target[0] = options.fin ? options.opcode | 0x80 : options.opcode;
+    if (options.rsv1) target[0] |= 0x40;
+
+    target[1] = payloadLength;
+
+    if (payloadLength === 126) {
+      target.writeUInt16BE(dataLength, 2);
+    } else if (payloadLength === 127) {
+      target[2] = target[3] = 0;
+      target.writeUIntBE(dataLength, 4, 6);
+    }
+
+    if (!options.mask) return [target, data];
+
+    target[1] |= 0x80;
+    target[offset - 4] = mask[0];
+    target[offset - 3] = mask[1];
+    target[offset - 2] = mask[2];
+    target[offset - 1] = mask[3];
+
+    if (skipMasking) return [target, data];
+
+    if (merge) {
+      applyMask(data, mask, target, offset, dataLength);
+      return [target];
+    }
+
+    applyMask(data, mask, data, 0, dataLength);
+    return [target, data];
+  }
+
+  /**
+   * Sends a close message to the other peer.
+   *
+   * @param {Number} [code] The status code component of the body
+   * @param {(String|Buffer)} [data] The message component of the body
+   * @param {Boolean} [mask=false] Specifies whether or not to mask the message
+   * @param {Function} [cb] Callback
+   * @public
+   */
+  close(code, data, mask, cb) {
+    let buf;
+
+    if (code === undefined) {
+      buf = EMPTY_BUFFER;
+    } else if (typeof code !== 'number' || !isValidStatusCode(code)) {
+      throw new TypeError('First argument must be a valid error code number');
+    } else if (data === undefined || !data.length) {
+      buf = Buffer.allocUnsafe(2);
+      buf.writeUInt16BE(code, 0);
+    } else {
+      const length = Buffer.byteLength(data);
+
+      if (length > 123) {
+        throw new RangeError('The message must not be greater than 123 bytes');
+      }
+
+      buf = Buffer.allocUnsafe(2 + length);
+      buf.writeUInt16BE(code, 0);
+
+      if (typeof data === 'string') {
+        buf.write(data, 2);
+      } else {
+        buf.set(data, 2);
+      }
+    }
+
+    const options = {
+      [kByteLength]: buf.length,
+      fin: true,
+      generateMask: this._generateMask,
+      mask,
+      maskBuffer: this._maskBuffer,
+      opcode: 0x08,
+      readOnly: false,
+      rsv1: false
+    };
+
+    if (this._deflating) {
+      this.enqueue([this.dispatch, buf, false, options, cb]);
+    } else {
+      this.sendFrame(Sender.frame(buf, options), cb);
+    }
+  }
+
+  /**
+   * Sends a ping message to the other peer.
+   *
+   * @param {*} data The message to send
+   * @param {Boolean} [mask=false] Specifies whether or not to mask `data`
+   * @param {Function} [cb] Callback
+   * @public
+   */
+  ping(data, mask, cb) {
+    let byteLength;
+    let readOnly;
+
+    if (typeof data === 'string') {
+      byteLength = Buffer.byteLength(data);
+      readOnly = false;
+    } else {
+      data = toBuffer(data);
+      byteLength = data.length;
+      readOnly = toBuffer.readOnly;
+    }
+
+    if (byteLength > 125) {
+      throw new RangeError('The data size must not be greater than 125 bytes');
+    }
+
+    const options = {
+      [kByteLength]: byteLength,
+      fin: true,
+      generateMask: this._generateMask,
+      mask,
+      maskBuffer: this._maskBuffer,
+      opcode: 0x09,
+      readOnly,
+      rsv1: false
+    };
+
+    if (this._deflating) {
+      this.enqueue([this.dispatch, data, false, options, cb]);
+    } else {
+      this.sendFrame(Sender.frame(data, options), cb);
+    }
+  }
+
+  /**
+   * Sends a pong message to the other peer.
+   *
+   * @param {*} data The message to send
+   * @param {Boolean} [mask=false] Specifies whether or not to mask `data`
+   * @param {Function} [cb] Callback
+   * @public
+   */
+  pong(data, mask, cb) {
+    let byteLength;
+    let readOnly;
+
+    if (typeof data === 'string') {
+      byteLength = Buffer.byteLength(data);
+      readOnly = false;
+    } else {
+      data = toBuffer(data);
+      byteLength = data.length;
+      readOnly = toBuffer.readOnly;
+    }
+
+    if (byteLength > 125) {
+      throw new RangeError('The data size must not be greater than 125 bytes');
+    }
+
+    const options = {
+      [kByteLength]: byteLength,
+      fin: true,
+      generateMask: this._generateMask,
+      mask,
+      maskBuffer: this._maskBuffer,
+      opcode: 0x0a,
+      readOnly,
+      rsv1: false
+    };
+
+    if (this._deflating) {
+      this.enqueue([this.dispatch, data, false, options, cb]);
+    } else {
+      this.sendFrame(Sender.frame(data, options), cb);
+    }
+  }
+
+  /**
+   * Sends a data message to the other peer.
+   *
+   * @param {*} data The message to send
+   * @param {Object} options Options object
+   * @param {Boolean} [options.binary=false] Specifies whether `data` is binary
+   *     or text
+   * @param {Boolean} [options.compress=false] Specifies whether or not to
+   *     compress `data`
+   * @param {Boolean} [options.fin=false] Specifies whether the fragment is the
+   *     last one
+   * @param {Boolean} [options.mask=false] Specifies whether or not to mask
+   *     `data`
+   * @param {Function} [cb] Callback
+   * @public
+   */
+  send(data, options, cb) {
+    const perMessageDeflate = this._extensions[PerMessageDeflate.extensionName];
+    let opcode = options.binary ? 2 : 1;
+    let rsv1 = options.compress;
+
+    let byteLength;
+    let readOnly;
+
+    if (typeof data === 'string') {
+      byteLength = Buffer.byteLength(data);
+      readOnly = false;
+    } else {
+      data = toBuffer(data);
+      byteLength = data.length;
+      readOnly = toBuffer.readOnly;
+    }
+
+    if (this._firstFragment) {
+      this._firstFragment = false;
+      if (
+        rsv1 &&
+        perMessageDeflate &&
+        perMessageDeflate.params[
+          perMessageDeflate._isServer
+            ? 'server_no_context_takeover'
+            : 'client_no_context_takeover'
+        ]
+      ) {
+        rsv1 = byteLength >= perMessageDeflate._threshold;
+      }
+      this._compress = rsv1;
+    } else {
+      rsv1 = false;
+      opcode = 0;
+    }
+
+    if (options.fin) this._firstFragment = true;
+
+    if (perMessageDeflate) {
+      const opts = {
+        [kByteLength]: byteLength,
+        fin: options.fin,
+        generateMask: this._generateMask,
+        mask: options.mask,
+        maskBuffer: this._maskBuffer,
+        opcode,
+        readOnly,
+        rsv1
+      };
+
+      if (this._deflating) {
+        this.enqueue([this.dispatch, data, this._compress, opts, cb]);
+      } else {
+        this.dispatch(data, this._compress, opts, cb);
+      }
+    } else {
+      this.sendFrame(
+        Sender.frame(data, {
+          [kByteLength]: byteLength,
+          fin: options.fin,
+          generateMask: this._generateMask,
+          mask: options.mask,
+          maskBuffer: this._maskBuffer,
+          opcode,
+          readOnly,
+          rsv1: false
+        }),
+        cb
+      );
+    }
+  }
+
+  /**
+   * Dispatches a message.
+   *
+   * @param {(Buffer|String)} data The message to send
+   * @param {Boolean} [compress=false] Specifies whether or not to compress
+   *     `data`
+   * @param {Object} options Options object
+   * @param {Boolean} [options.fin=false] Specifies whether or not to set the
+   *     FIN bit
+   * @param {Function} [options.generateMask] The function used to generate the
+   *     masking key
+   * @param {Boolean} [options.mask=false] Specifies whether or not to mask
+   *     `data`
+   * @param {Buffer} [options.maskBuffer] The buffer used to store the masking
+   *     key
+   * @param {Number} options.opcode The opcode
+   * @param {Boolean} [options.readOnly=false] Specifies whether `data` can be
+   *     modified
+   * @param {Boolean} [options.rsv1=false] Specifies whether or not to set the
+   *     RSV1 bit
+   * @param {Function} [cb] Callback
+   * @private
+   */
+  dispatch(data, compress, options, cb) {
+    if (!compress) {
+      this.sendFrame(Sender.frame(data, options), cb);
+      return;
+    }
+
+    const perMessageDeflate = this._extensions[PerMessageDeflate.extensionName];
+
+    this._bufferedBytes += options[kByteLength];
+    this._deflating = true;
+    perMessageDeflate.compress(data, options.fin, (_, buf) => {
+      if (this._socket.destroyed) {
+        const err = new Error(
+          'The socket was closed while data was being compressed'
+        );
+
+        if (typeof cb === 'function') cb(err);
+
+        for (let i = 0; i < this._queue.length; i++) {
+          const params = this._queue[i];
+          const callback = params[params.length - 1];
+
+          if (typeof callback === 'function') callback(err);
+        }
+
+        return;
+      }
+
+      this._bufferedBytes -= options[kByteLength];
+      this._deflating = false;
+      options.readOnly = false;
+      this.sendFrame(Sender.frame(buf, options), cb);
+      this.dequeue();
+    });
+  }
+
+  /**
+   * Executes queued send operations.
+   *
+   * @private
+   */
+  dequeue() {
+    while (!this._deflating && this._queue.length) {
+      const params = this._queue.shift();
+
+      this._bufferedBytes -= params[3][kByteLength];
+      Reflect.apply(params[0], this, params.slice(1));
+    }
+  }
+
+  /**
+   * Enqueues a send operation.
+   *
+   * @param {Array} params Send operation parameters.
+   * @private
+   */
+  enqueue(params) {
+    this._bufferedBytes += params[3][kByteLength];
+    this._queue.push(params);
+  }
+
+  /**
+   * Sends a frame.
+   *
+   * @param {Buffer[]} list The frame to send
+   * @param {Function} [cb] Callback
+   * @private
+   */
+  sendFrame(list, cb) {
+    if (list.length === 2) {
+      this._socket.cork();
+      this._socket.write(list[0]);
+      this._socket.write(list[1], cb);
+      this._socket.uncork();
+    } else {
+      this._socket.write(list[0], cb);
+    }
+  }
+}
+
+module.exports = Sender;

resources/app/node_modules/socket.io-adapter/node_modules/ws/lib/stream.js

@@ -0,0 +1,159 @@
+'use strict';
+
+const { Duplex } = require('stream');
+
+/**
+ * Emits the `'close'` event on a stream.
+ *
+ * @param {Duplex} stream The stream.
+ * @private
+ */
+function emitClose(stream) {
+  stream.emit('close');
+}
+
+/**
+ * The listener of the `'end'` event.
+ *
+ * @private
+ */
+function duplexOnEnd() {
+  if (!this.destroyed && this._writableState.finished) {
+    this.destroy();
+  }
+}
+
+/**
+ * The listener of the `'error'` event.
+ *
+ * @param {Error} err The error
+ * @private
+ */
+function duplexOnError(err) {
+  this.removeListener('error', duplexOnError);
+  this.destroy();
+  if (this.listenerCount('error') === 0) {
+    // Do not suppress the throwing behavior.
+    this.emit('error', err);
+  }
+}
+
+/**
+ * Wraps a `WebSocket` in a duplex stream.
+ *
+ * @param {WebSocket} ws The `WebSocket` to wrap
+ * @param {Object} [options] The options for the `Duplex` constructor
+ * @return {Duplex} The duplex stream
+ * @public
+ */
+function createWebSocketStream(ws, options) {
+  let terminateOnDestroy = true;
+
+  const duplex = new Duplex({
+    ...options,
+    autoDestroy: false,
+    emitClose: false,
+    objectMode: false,
+    writableObjectMode: false
+  });
+
+  ws.on('message', function message(msg, isBinary) {
+    const data =
+      !isBinary && duplex._readableState.objectMode ? msg.toString() : msg;
+
+    if (!duplex.push(data)) ws.pause();
+  });
+
+  ws.once('error', function error(err) {
+    if (duplex.destroyed) return;
+
+    // Prevent `ws.terminate()` from being called by `duplex._destroy()`.
+    //
+    // - If the `'error'` event is emitted before the `'open'` event, then
+    //   `ws.terminate()` is a noop as no socket is assigned.
+    // - Otherwise, the error is re-emitted by the listener of the `'error'`
+    //   event of the `Receiver` object. The listener already closes the
+    //   connection by calling `ws.close()`. This allows a close frame to be
+    //   sent to the other peer. If `ws.terminate()` is called right after this,
+    //   then the close frame might not be sent.
+    terminateOnDestroy = false;
+    duplex.destroy(err);
+  });
+
+  ws.once('close', function close() {
+    if (duplex.destroyed) return;
+
+    duplex.push(null);
+  });
+
+  duplex._destroy = function (err, callback) {
+    if (ws.readyState === ws.CLOSED) {
+      callback(err);
+      process.nextTick(emitClose, duplex);
+      return;
+    }
+
+    let called = false;
+
+    ws.once('error', function error(err) {
+      called = true;
+      callback(err);
+    });
+
+    ws.once('close', function close() {
+      if (!called) callback(err);
+      process.nextTick(emitClose, duplex);
+    });
+
+    if (terminateOnDestroy) ws.terminate();
+  };
+
+  duplex._final = function (callback) {
+    if (ws.readyState === ws.CONNECTING) {
+      ws.once('open', function open() {
+        duplex._final(callback);
+      });
+      return;
+    }
+
+    // If the value of the `_socket` property is `null` it means that `ws` is a
+    // client websocket and the handshake failed. In fact, when this happens, a
+    // socket is never assigned to the websocket. Wait for the `'error'` event
+    // that will be emitted by the websocket.
+    if (ws._socket === null) return;
+
+    if (ws._socket._writableState.finished) {
+      callback();
+      if (duplex._readableState.endEmitted) duplex.destroy();
+    } else {
+      ws._socket.once('finish', function finish() {
+        // `duplex` is not destroyed here because the `'end'` event will be
+        // emitted on `duplex` after this `'finish'` event. The EOF signaling
+        // `null` chunk is, in fact, pushed when the websocket emits `'close'`.
+        callback();
+      });
+      ws.close();
+    }
+  };
+
+  duplex._read = function () {
+    if (ws.isPaused) ws.resume();
+  };
+
+  duplex._write = function (chunk, encoding, callback) {
+    if (ws.readyState === ws.CONNECTING) {
+      ws.once('open', function open() {
+        duplex._write(chunk, encoding, callback);
+      });
+      return;
+    }
+
+    ws.send(chunk, callback);
+  };
+
+  duplex.on('end', duplexOnEnd);
+  duplex.on('error', duplexOnError);
+  return duplex;
+}
+
+module.exports = createWebSocketStream;

resources/app/node_modules/socket.io-adapter/node_modules/ws/lib/subprotocol.js

@@ -0,0 +1,62 @@
+'use strict';
+
+const { tokenChars } = require('./validation');
+
+/**
+ * Parses the `Sec-WebSocket-Protocol` header into a set of subprotocol names.
+ *
+ * @param {String} header The field value of the header
+ * @return {Set} The subprotocol names
+ * @public
+ */
+function parse(header) {
+  const protocols = new Set();
+  let start = -1;
+  let end = -1;
+  let i = 0;
+
+  for (i; i < header.length; i++) {
+    const code = header.charCodeAt(i);
+
+    if (end === -1 && tokenChars[code] === 1) {
+      if (start === -1) start = i;
+    } else if (
+      i !== 0 &&
+      (code === 0x20 /* ' ' */ || code === 0x09) /* '\t' */
+    ) {
+      if (end === -1 && start !== -1) end = i;
+    } else if (code === 0x2c /* ',' */) {
+      if (start === -1) {
+        throw new SyntaxError(`Unexpected character at index ${i}`);
+      }
+
+      if (end === -1) end = i;
+
+      const protocol = header.slice(start, end);
+
+      if (protocols.has(protocol)) {
+        throw new SyntaxError(`The "${protocol}" subprotocol is duplicated`);
+      }
+
+      protocols.add(protocol);
+      start = end = -1;
+    } else {
+      throw new SyntaxError(`Unexpected character at index ${i}`);
+    }
+  }
+
+  if (start === -1 || end !== -1) {
+    throw new SyntaxError('Unexpected end of input');
+  }
+
+  const protocol = header.slice(start, i);
+
+  if (protocols.has(protocol)) {
+    throw new SyntaxError(`The "${protocol}" subprotocol is duplicated`);
+  }
+
+  protocols.add(protocol);
+  return protocols;
+}
+
+module.exports = { parse };

resources/app/node_modules/socket.io-adapter/node_modules/ws/lib/validation.js

@@ -0,0 +1,125 @@
+'use strict';
+
+//
+// Allowed token characters:
+//
+// '!', '#', '$', '%', '&', ''', '*', '+', '-',
+// '.', 0-9, A-Z, '^', '_', '`', a-z, '|', '~'
+//
+// tokenChars[32] === 0 // ' '
+// tokenChars[33] === 1 // '!'
+// tokenChars[34] === 0 // '"'
+// ...
+//
+// prettier-ignore
+const tokenChars = [
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0 - 15
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16 - 31
+  0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, // 32 - 47
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, // 48 - 63
+  0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 64 - 79
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, // 80 - 95
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 96 - 111
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0 // 112 - 127
+];
+
+/**
+ * Checks if a status code is allowed in a close frame.
+ *
+ * @param {Number} code The status code
+ * @return {Boolean} `true` if the status code is valid, else `false`
+ * @public
+ */
+function isValidStatusCode(code) {
+  return (
+    (code >= 1000 &&
+      code <= 1014 &&
+      code !== 1004 &&
+      code !== 1005 &&
+      code !== 1006) ||
+    (code >= 3000 && code <= 4999)
+  );
+}
+
+/**
+ * Checks if a given buffer contains only correct UTF-8.
+ * Ported from https://www.cl.cam.ac.uk/%7Emgk25/ucs/utf8_check.c by
+ * Markus Kuhn.
+ *
+ * @param {Buffer} buf The buffer to check
+ * @return {Boolean} `true` if `buf` contains only correct UTF-8, else `false`
+ * @public
+ */
+function _isValidUTF8(buf) {
+  const len = buf.length;
+  let i = 0;
+
+  while (i < len) {
+    if ((buf[i] & 0x80) === 0) {
+      // 0xxxxxxx
+      i++;
+    } else if ((buf[i] & 0xe0) === 0xc0) {
+      // 110xxxxx 10xxxxxx
+      if (
+        i + 1 === len ||
+        (buf[i + 1] & 0xc0) !== 0x80 ||
+        (buf[i] & 0xfe) === 0xc0 // Overlong
+      ) {
+        return false;
+      }
+
+      i += 2;
+    } else if ((buf[i] & 0xf0) === 0xe0) {
+      // 1110xxxx 10xxxxxx 10xxxxxx
+      if (
+        i + 2 >= len ||
+        (buf[i + 1] & 0xc0) !== 0x80 ||
+        (buf[i + 2] & 0xc0) !== 0x80 ||
+        (buf[i] === 0xe0 && (buf[i + 1] & 0xe0) === 0x80) || // Overlong
+        (buf[i] === 0xed && (buf[i + 1] & 0xe0) === 0xa0) // Surrogate (U+D800 - U+DFFF)
+      ) {
+        return false;
+      }
+
+      i += 3;
+    } else if ((buf[i] & 0xf8) === 0xf0) {
+      // 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
+      if (
+        i + 3 >= len ||
+        (buf[i + 1] & 0xc0) !== 0x80 ||
+        (buf[i + 2] & 0xc0) !== 0x80 ||
+        (buf[i + 3] & 0xc0) !== 0x80 ||
+        (buf[i] === 0xf0 && (buf[i + 1] & 0xf0) === 0x80) || // Overlong
+        (buf[i] === 0xf4 && buf[i + 1] > 0x8f) ||
+        buf[i] > 0xf4 // > U+10FFFF
+      ) {
+        return false;
+      }
+
+      i += 4;
+    } else {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+module.exports = {
+  isValidStatusCode,
+  isValidUTF8: _isValidUTF8,
+  tokenChars
+};
+
+/* istanbul ignore else  */
+if (!process.env.WS_NO_UTF_8_VALIDATE) {
+  try {
+    const isValidUTF8 = require('utf-8-validate');
+
+    module.exports.isValidUTF8 = function (buf) {
+      return buf.length < 150 ? _isValidUTF8(buf) : isValidUTF8(buf);
+    };
+  } catch (e) {
+    // Continue regardless of the error.
+  }
+}

resources/app/node_modules/socket.io-adapter/node_modules/ws/lib/websocket-server.js

@@ -0,0 +1,535 @@
+/* eslint no-unused-vars: ["error", { "varsIgnorePattern": "^net|tls|https$" }] */
+
+'use strict';
+
+const EventEmitter = require('events');
+const http = require('http');
+const https = require('https');
+const net = require('net');
+const tls = require('tls');
+const { createHash } = require('crypto');
+
+const extension = require('./extension');
+const PerMessageDeflate = require('./permessage-deflate');
+const subprotocol = require('./subprotocol');
+const WebSocket = require('./websocket');
+const { GUID, kWebSocket } = require('./constants');
+
+const keyRegex = /^[+/0-9A-Za-z]{22}==$/;
+
+const RUNNING = 0;
+const CLOSING = 1;
+const CLOSED = 2;
+
+/**
+ * Class representing a WebSocket server.
+ *
+ * @extends EventEmitter
+ */
+class WebSocketServer extends EventEmitter {
+  /**
+   * Create a `WebSocketServer` instance.
+   *
+   * @param {Object} options Configuration options
+   * @param {Number} [options.backlog=511] The maximum length of the queue of
+   *     pending connections
+   * @param {Boolean} [options.clientTracking=true] Specifies whether or not to
+   *     track clients
+   * @param {Function} [options.handleProtocols] A hook to handle protocols
+   * @param {String} [options.host] The hostname where to bind the server
+   * @param {Number} [options.maxPayload=104857600] The maximum allowed message
+   *     size
+   * @param {Boolean} [options.noServer=false] Enable no server mode
+   * @param {String} [options.path] Accept only connections matching this path
+   * @param {(Boolean|Object)} [options.perMessageDeflate=false] Enable/disable
+   *     permessage-deflate
+   * @param {Number} [options.port] The port where to bind the server
+   * @param {(http.Server|https.Server)} [options.server] A pre-created HTTP/S
+   *     server to use
+   * @param {Boolean} [options.skipUTF8Validation=false] Specifies whether or
+   *     not to skip UTF-8 validation for text and close messages
+   * @param {Function} [options.verifyClient] A hook to reject connections
+   * @param {Function} [options.WebSocket=WebSocket] Specifies the `WebSocket`
+   *     class to use. It must be the `WebSocket` class or class that extends it
+   * @param {Function} [callback] A listener for the `listening` event
+   */
+  constructor(options, callback) {
+    super();
+
+    options = {
+      maxPayload: 100 * 1024 * 1024,
+      skipUTF8Validation: false,
+      perMessageDeflate: false,
+      handleProtocols: null,
+      clientTracking: true,
+      verifyClient: null,
+      noServer: false,
+      backlog: null, // use default (511 as implemented in net.js)
+      server: null,
+      host: null,
+      path: null,
+      port: null,
+      WebSocket,
+      ...options
+    };
+
+    if (
+      (options.port == null && !options.server && !options.noServer) ||
+      (options.port != null && (options.server || options.noServer)) ||
+      (options.server && options.noServer)
+    ) {
+      throw new TypeError(
+        'One and only one of the "port", "server", or "noServer" options ' +
+          'must be specified'
+      );
+    }
+
+    if (options.port != null) {
+      this._server = http.createServer((req, res) => {
+        const body = http.STATUS_CODES[426];
+
+        res.writeHead(426, {
+          'Content-Length': body.length,
+          'Content-Type': 'text/plain'
+        });
+        res.end(body);
+      });
+      this._server.listen(
+        options.port,
+        options.host,
+        options.backlog,
+        callback
+      );
+    } else if (options.server) {
+      this._server = options.server;
+    }
+
+    if (this._server) {
+      const emitConnection = this.emit.bind(this, 'connection');
+
+      this._removeListeners = addListeners(this._server, {
+        listening: this.emit.bind(this, 'listening'),
+        error: this.emit.bind(this, 'error'),
+        upgrade: (req, socket, head) => {
+          this.handleUpgrade(req, socket, head, emitConnection);
+        }
+      });
+    }
+
+    if (options.perMessageDeflate === true) options.perMessageDeflate = {};
+    if (options.clientTracking) {
+      this.clients = new Set();
+      this._shouldEmitClose = false;
+    }
+
+    this.options = options;
+    this._state = RUNNING;
+  }
+
+  /**
+   * Returns the bound address, the address family name, and port of the server
+   * as reported by the operating system if listening on an IP socket.
+   * If the server is listening on a pipe or UNIX domain socket, the name is
+   * returned as a string.
+   *
+   * @return {(Object|String|null)} The address of the server
+   * @public
+   */
+  address() {
+    if (this.options.noServer) {
+      throw new Error('The server is operating in "noServer" mode');
+    }
+
+    if (!this._server) return null;
+    return this._server.address();
+  }
+
+  /**
+   * Stop the server from accepting new connections and emit the `'close'` event
+   * when all existing connections are closed.
+   *
+   * @param {Function} [cb] A one-time listener for the `'close'` event
+   * @public
+   */
+  close(cb) {
+    if (this._state === CLOSED) {
+      if (cb) {
+        this.once('close', () => {
+          cb(new Error('The server is not running'));
+        });
+      }
+
+      process.nextTick(emitClose, this);
+      return;
+    }
+
+    if (cb) this.once('close', cb);
+
+    if (this._state === CLOSING) return;
+    this._state = CLOSING;
+
+    if (this.options.noServer || this.options.server) {
+      if (this._server) {
+        this._removeListeners();
+        this._removeListeners = this._server = null;
+      }
+
+      if (this.clients) {
+        if (!this.clients.size) {
+          process.nextTick(emitClose, this);
+        } else {
+          this._shouldEmitClose = true;
+        }
+      } else {
+        process.nextTick(emitClose, this);
+      }
+    } else {
+      const server = this._server;
+
+      this._removeListeners();
+      this._removeListeners = this._server = null;
+
+      //
+      // The HTTP/S server was created internally. Close it, and rely on its
+      // `'close'` event.
+      //
+      server.close(() => {
+        emitClose(this);
+      });
+    }
+  }
+
+  /**
+   * See if a given request should be handled by this server instance.
+   *
+   * @param {http.IncomingMessage} req Request object to inspect
+   * @return {Boolean} `true` if the request is valid, else `false`
+   * @public
+   */
+  shouldHandle(req) {
+    if (this.options.path) {
+      const index = req.url.indexOf('?');
+      const pathname = index !== -1 ? req.url.slice(0, index) : req.url;
+
+      if (pathname !== this.options.path) return false;
+    }
+
+    return true;
+  }
+
+  /**
+   * Handle a HTTP Upgrade request.
+   *
+   * @param {http.IncomingMessage} req The request object
+   * @param {(net.Socket|tls.Socket)} socket The network socket between the
+   *     server and client
+   * @param {Buffer} head The first packet of the upgraded stream
+   * @param {Function} cb Callback
+   * @public
+   */
+  handleUpgrade(req, socket, head, cb) {
+    socket.on('error', socketOnError);
+
+    const key = req.headers['sec-websocket-key'];
+    const version = +req.headers['sec-websocket-version'];
+
+    if (req.method !== 'GET') {
+      const message = 'Invalid HTTP method';
+      abortHandshakeOrEmitwsClientError(this, req, socket, 405, message);
+      return;
+    }
+
+    if (req.headers.upgrade.toLowerCase() !== 'websocket') {
+      const message = 'Invalid Upgrade header';
+      abortHandshakeOrEmitwsClientError(this, req, socket, 400, message);
+      return;
+    }
+
+    if (!key || !keyRegex.test(key)) {
+      const message = 'Missing or invalid Sec-WebSocket-Key header';
+      abortHandshakeOrEmitwsClientError(this, req, socket, 400, message);
+      return;
+    }
+
+    if (version !== 8 && version !== 13) {
+      const message = 'Missing or invalid Sec-WebSocket-Version header';
+      abortHandshakeOrEmitwsClientError(this, req, socket, 400, message);
+      return;
+    }
+
+    if (!this.shouldHandle(req)) {
+      abortHandshake(socket, 400);
+      return;
+    }
+
+    const secWebSocketProtocol = req.headers['sec-websocket-protocol'];
+    let protocols = new Set();
+
+    if (secWebSocketProtocol !== undefined) {
+      try {
+        protocols = subprotocol.parse(secWebSocketProtocol);
+      } catch (err) {
+        const message = 'Invalid Sec-WebSocket-Protocol header';
+        abortHandshakeOrEmitwsClientError(this, req, socket, 400, message);
+        return;
+      }
+    }
+
+    const secWebSocketExtensions = req.headers['sec-websocket-extensions'];
+    const extensions = {};
+
+    if (
+      this.options.perMessageDeflate &&
+      secWebSocketExtensions !== undefined
+    ) {
+      const perMessageDeflate = new PerMessageDeflate(
+        this.options.perMessageDeflate,
+        true,
+        this.options.maxPayload
+      );
+
+      try {
+        const offers = extension.parse(secWebSocketExtensions);
+
+        if (offers[PerMessageDeflate.extensionName]) {
+          perMessageDeflate.accept(offers[PerMessageDeflate.extensionName]);
+          extensions[PerMessageDeflate.extensionName] = perMessageDeflate;
+        }
+      } catch (err) {
+        const message =
+          'Invalid or unacceptable Sec-WebSocket-Extensions header';
+        abortHandshakeOrEmitwsClientError(this, req, socket, 400, message);
+        return;
+      }
+    }
+
+    //
+    // Optionally call external client verification handler.
+    //
+    if (this.options.verifyClient) {
+      const info = {
+        origin:
+          req.headers[`${version === 8 ? 'sec-websocket-origin' : 'origin'}`],
+        secure: !!(req.socket.authorized || req.socket.encrypted),
+        req
+      };
+
+      if (this.options.verifyClient.length === 2) {
+        this.options.verifyClient(info, (verified, code, message, headers) => {
+          if (!verified) {
+            return abortHandshake(socket, code || 401, message, headers);
+          }
+
+          this.completeUpgrade(
+            extensions,
+            key,
+            protocols,
+            req,
+            socket,
+            head,
+            cb
+          );
+        });
+        return;
+      }
+
+      if (!this.options.verifyClient(info)) return abortHandshake(socket, 401);
+    }
+
+    this.completeUpgrade(extensions, key, protocols, req, socket, head, cb);
+  }
+
+  /**
+   * Upgrade the connection to WebSocket.
+   *
+   * @param {Object} extensions The accepted extensions
+   * @param {String} key The value of the `Sec-WebSocket-Key` header
+   * @param {Set} protocols The subprotocols
+   * @param {http.IncomingMessage} req The request object
+   * @param {(net.Socket|tls.Socket)} socket The network socket between the
+   *     server and client
+   * @param {Buffer} head The first packet of the upgraded stream
+   * @param {Function} cb Callback
+   * @throws {Error} If called more than once with the same socket
+   * @private
+   */
+  completeUpgrade(extensions, key, protocols, req, socket, head, cb) {
+    //
+    // Destroy the socket if the client has already sent a FIN packet.
+    //
+    if (!socket.readable || !socket.writable) return socket.destroy();
+
+    if (socket[kWebSocket]) {
+      throw new Error(
+        'server.handleUpgrade() was called more than once with the same ' +
+          'socket, possibly due to a misconfiguration'
+      );
+    }
+
+    if (this._state > RUNNING) return abortHandshake(socket, 503);
+
+    const digest = createHash('sha1')
+      .update(key + GUID)
+      .digest('base64');
+
+    const headers = [
+      'HTTP/1.1 101 Switching Protocols',
+      'Upgrade: websocket',
+      'Connection: Upgrade',
+      `Sec-WebSocket-Accept: ${digest}`
+    ];
+
+    const ws = new this.options.WebSocket(null);
+
+    if (protocols.size) {
+      //
+      // Optionally call external protocol selection handler.
+      //
+      const protocol = this.options.handleProtocols
+        ? this.options.handleProtocols(protocols, req)
+        : protocols.values().next().value;
+
+      if (protocol) {
+        headers.push(`Sec-WebSocket-Protocol: ${protocol}`);
+        ws._protocol = protocol;
+      }
+    }
+
+    if (extensions[PerMessageDeflate.extensionName]) {
+      const params = extensions[PerMessageDeflate.extensionName].params;
+      const value = extension.format({
+        [PerMessageDeflate.extensionName]: [params]
+      });
+      headers.push(`Sec-WebSocket-Extensions: ${value}`);
+      ws._extensions = extensions;
+    }
+
+    //
+    // Allow external modification/inspection of handshake headers.
+    //
+    this.emit('headers', headers, req);
+
+    socket.write(headers.concat('\r\n').join('\r\n'));
+    socket.removeListener('error', socketOnError);
+
+    ws.setSocket(socket, head, {
+      maxPayload: this.options.maxPayload,
+      skipUTF8Validation: this.options.skipUTF8Validation
+    });
+
+    if (this.clients) {
+      this.clients.add(ws);
+      ws.on('close', () => {
+        this.clients.delete(ws);
+
+        if (this._shouldEmitClose && !this.clients.size) {
+          process.nextTick(emitClose, this);
+        }
+      });
+    }
+
+    cb(ws, req);
+  }
+}
+
+module.exports = WebSocketServer;
+
+/**
+ * Add event listeners on an `EventEmitter` using a map of <event, listener>
+ * pairs.
+ *
+ * @param {EventEmitter} server The event emitter
+ * @param {Object.<String, Function>} map The listeners to add
+ * @return {Function} A function that will remove the added listeners when
+ *     called
+ * @private
+ */
+function addListeners(server, map) {
+  for (const event of Object.keys(map)) server.on(event, map[event]);
+
+  return function removeListeners() {
+    for (const event of Object.keys(map)) {
+      server.removeListener(event, map[event]);
+    }
+  };
+}
+
+/**
+ * Emit a `'close'` event on an `EventEmitter`.
+ *
+ * @param {EventEmitter} server The event emitter
+ * @private
+ */
+function emitClose(server) {
+  server._state = CLOSED;
+  server.emit('close');
+}
+
+/**
+ * Handle socket errors.
+ *
+ * @private
+ */
+function socketOnError() {
+  this.destroy();
+}
+
+/**
+ * Close the connection when preconditions are not fulfilled.
+ *
+ * @param {(net.Socket|tls.Socket)} socket The socket of the upgrade request
+ * @param {Number} code The HTTP response status code
+ * @param {String} [message] The HTTP response body
+ * @param {Object} [headers] Additional HTTP response headers
+ * @private
+ */
+function abortHandshake(socket, code, message, headers) {
+  //
+  // The socket is writable unless the user destroyed or ended it before calling
+  // `server.handleUpgrade()` or in the `verifyClient` function, which is a user
+  // error. Handling this does not make much sense as the worst that can happen
+  // is that some of the data written by the user might be discarded due to the
+  // call to `socket.end()` below, which triggers an `'error'` event that in
+  // turn causes the socket to be destroyed.
+  //
+  message = message || http.STATUS_CODES[code];
+  headers = {
+    Connection: 'close',
+    'Content-Type': 'text/html',
+    'Content-Length': Buffer.byteLength(message),
+    ...headers
+  };
+
+  socket.once('finish', socket.destroy);
+
+  socket.end(
+    `HTTP/1.1 ${code} ${http.STATUS_CODES[code]}\r\n` +
+      Object.keys(headers)
+        .map((h) => `${h}: ${headers[h]}`)
+        .join('\r\n') +
+      '\r\n\r\n' +
+      message
+  );
+}
+
+/**
+ * Emit a `'wsClientError'` event on a `WebSocketServer` if there is at least
+ * one listener for it, otherwise call `abortHandshake()`.
+ *
+ * @param {WebSocketServer} server The WebSocket server
+ * @param {http.IncomingMessage} req The request object
+ * @param {(net.Socket|tls.Socket)} socket The socket of the upgrade request
+ * @param {Number} code The HTTP response status code
+ * @param {String} message The HTTP response body
+ * @private
+ */
+function abortHandshakeOrEmitwsClientError(server, req, socket, code, message) {
+  if (server.listenerCount('wsClientError')) {
+    const err = new Error(message);
+    Error.captureStackTrace(err, abortHandshakeOrEmitwsClientError);
+
+    server.emit('wsClientError', err, socket, req);
+  } else {
+    abortHandshake(socket, code, message);
+  }
+}

resources/app/node_modules/socket.io-adapter/node_modules/ws/package.json

@@ -0,0 +1,50 @@
+{
+  "name": "ws",
+  "version": "8.11.0",
+  "description": "Simple to use, blazing fast and thoroughly tested websocket client and server for Node.js",
+  "homepage": "https://github.com/websockets/ws",
+  "repository": "websockets/ws",
+  "author": "Einar Otto Stangvik <einaros@gmail.com> (http://2x.io)",
+  "license": "MIT",
+  "main": "index.js",
+  "exports": {
+    ".": {
+      "import": "./wrapper.mjs",
+      "require": "./index.js"
+    },
+    "./package.json": "./package.json"
+  },
+  "browser": "browser.js",
+  "engines": {
+    "node": ">=10.0.0"
+  },
+  "files": [
+    "browser.js",
+    "index.js",
+    "lib/*.js",
+    "wrapper.mjs"
+  ],
+  "peerDependencies": {
+    "bufferutil": "^4.0.1",
+    "utf-8-validate": "^5.0.2"
+  },
+  "peerDependenciesMeta": {
+    "bufferutil": {
+      "optional": true
+    },
+    "utf-8-validate": {
+      "optional": true
+    }
+  },
+  "devDependencies": {
+    "benchmark": "^2.1.4",
+    "bufferutil": "^4.0.1",
+    "eslint": "^8.0.0",
+    "eslint-config-prettier": "^8.1.0",
+    "eslint-plugin-prettier": "^4.0.0",
+    "mocha": "^8.4.0",
+    "nyc": "^15.0.0",
+    "prettier": "^2.0.5",
+    "utf-8-validate": "^5.0.2"
+  }
+}

resources/app/node_modules/socket.io-adapter/node_modules/ws/wrapper.mjs

@@ -0,0 +1,8 @@
+import createWebSocketStream from './lib/stream.js';
+import Receiver from './lib/receiver.js';
+import Sender from './lib/sender.js';
+import WebSocket from './lib/websocket.js';
+import WebSocketServer from './lib/websocket-server.js';
+
+export { createWebSocketStream, Receiver, Sender, WebSocket, WebSocketServer };
+export default WebSocket;

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

@@ -0,0 +1,33 @@
+{
+  "name": "socket.io-adapter",
+  "version": "2.5.4",
+  "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": {
+    "debug": "~4.3.4",
+    "ws": "~8.11.0"
+  },
+  "devDependencies": {
+    "@types/debug": "^4.1.12",
+    "@types/expect.js": "^0.3.32",
+    "@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",
+    "socket.io": "^4.7.4",
+    "socket.io-client": "^4.7.4",
+    "ts-node": "^10.9.1",
+    "typescript": "^4.9.4"
+  }
+}