594 lines
19 KiB
JavaScript
594 lines
19 KiB
JavaScript
"use strict";
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var __importDefault = (this && this.__importDefault) || function (mod) {
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return (mod && mod.__esModule) ? mod : { "default": mod };
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.Namespace = exports.RESERVED_EVENTS = void 0;
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const socket_1 = require("./socket");
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const typed_events_1 = require("./typed-events");
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const debug_1 = __importDefault(require("debug"));
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const broadcast_operator_1 = require("./broadcast-operator");
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const debug = (0, debug_1.default)("socket.io:namespace");
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exports.RESERVED_EVENTS = new Set(["connect", "connection", "new_namespace"]);
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/**
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* A Namespace is a communication channel that allows you to split the logic of your application over a single shared
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* connection.
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*
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* Each namespace has its own:
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*
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* - event handlers
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*
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* ```
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* io.of("/orders").on("connection", (socket) => {
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* socket.on("order:list", () => {});
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* socket.on("order:create", () => {});
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* });
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*
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* io.of("/users").on("connection", (socket) => {
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* socket.on("user:list", () => {});
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* });
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* ```
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*
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* - rooms
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*
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* ```
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* const orderNamespace = io.of("/orders");
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*
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* orderNamespace.on("connection", (socket) => {
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* socket.join("room1");
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* orderNamespace.to("room1").emit("hello");
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* });
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*
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* const userNamespace = io.of("/users");
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*
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* userNamespace.on("connection", (socket) => {
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* socket.join("room1"); // distinct from the room in the "orders" namespace
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* userNamespace.to("room1").emit("holà");
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* });
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* ```
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*
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* - middlewares
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*
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* ```
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* const orderNamespace = io.of("/orders");
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*
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* orderNamespace.use((socket, next) => {
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* // ensure the socket has access to the "orders" namespace
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* });
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*
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* const userNamespace = io.of("/users");
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*
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* userNamespace.use((socket, next) => {
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* // ensure the socket has access to the "users" namespace
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* });
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* ```
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*/
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class Namespace extends typed_events_1.StrictEventEmitter {
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/**
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* Namespace constructor.
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*
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* @param server instance
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* @param name
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*/
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constructor(server, name) {
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super();
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this.sockets = new Map();
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/** @private */
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this._fns = [];
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/** @private */
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this._ids = 0;
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this.server = server;
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this.name = name;
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this._initAdapter();
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}
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/**
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* Initializes the `Adapter` for this nsp.
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* Run upon changing adapter by `Server#adapter`
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* in addition to the constructor.
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*
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* @private
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*/
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_initAdapter() {
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// @ts-ignore
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this.adapter = new (this.server.adapter())(this);
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}
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/**
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* Registers a middleware, which is a function that gets executed for every incoming {@link Socket}.
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*
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* @example
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* const myNamespace = io.of("/my-namespace");
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*
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* myNamespace.use((socket, next) => {
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* // ...
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* next();
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* });
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*
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* @param fn - the middleware function
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*/
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use(fn) {
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this._fns.push(fn);
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return this;
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}
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/**
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* Executes the middleware for an incoming client.
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*
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* @param socket - the socket that will get added
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* @param fn - last fn call in the middleware
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* @private
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*/
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run(socket, fn) {
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const fns = this._fns.slice(0);
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if (!fns.length)
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return fn(null);
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function run(i) {
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fns[i](socket, function (err) {
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// upon error, short-circuit
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if (err)
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return fn(err);
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// if no middleware left, summon callback
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if (!fns[i + 1])
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return fn(null);
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// go on to next
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run(i + 1);
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});
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}
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run(0);
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}
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/**
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* Targets a room when emitting.
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*
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* @example
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* const myNamespace = io.of("/my-namespace");
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*
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* // the “foo” event will be broadcast to all connected clients in the “room-101” room
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* myNamespace.to("room-101").emit("foo", "bar");
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*
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* // with an array of rooms (a client will be notified at most once)
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* myNamespace.to(["room-101", "room-102"]).emit("foo", "bar");
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*
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* // with multiple chained calls
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* myNamespace.to("room-101").to("room-102").emit("foo", "bar");
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*
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* @param room - a room, or an array of rooms
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* @return a new {@link BroadcastOperator} instance for chaining
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*/
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to(room) {
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return new broadcast_operator_1.BroadcastOperator(this.adapter).to(room);
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}
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/**
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* Targets a room when emitting. Similar to `to()`, but might feel clearer in some cases:
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*
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* @example
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* const myNamespace = io.of("/my-namespace");
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*
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* // disconnect all clients in the "room-101" room
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* myNamespace.in("room-101").disconnectSockets();
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*
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* @param room - a room, or an array of rooms
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* @return a new {@link BroadcastOperator} instance for chaining
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*/
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in(room) {
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return new broadcast_operator_1.BroadcastOperator(this.adapter).in(room);
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}
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/**
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* Excludes a room when emitting.
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*
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* @example
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* const myNamespace = io.of("/my-namespace");
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*
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* // the "foo" event will be broadcast to all connected clients, except the ones that are in the "room-101" room
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* myNamespace.except("room-101").emit("foo", "bar");
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*
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* // with an array of rooms
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* myNamespace.except(["room-101", "room-102"]).emit("foo", "bar");
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*
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* // with multiple chained calls
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* myNamespace.except("room-101").except("room-102").emit("foo", "bar");
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*
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* @param room - a room, or an array of rooms
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* @return a new {@link BroadcastOperator} instance for chaining
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*/
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except(room) {
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return new broadcast_operator_1.BroadcastOperator(this.adapter).except(room);
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}
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/**
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* Adds a new client.
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*
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* @return {Socket}
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* @private
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*/
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async _add(client, auth, fn) {
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var _a;
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debug("adding socket to nsp %s", this.name);
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const socket = await this._createSocket(client, auth);
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if (
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// @ts-ignore
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((_a = this.server.opts.connectionStateRecovery) === null || _a === void 0 ? void 0 : _a.skipMiddlewares) &&
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socket.recovered &&
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client.conn.readyState === "open") {
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return this._doConnect(socket, fn);
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}
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this.run(socket, (err) => {
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process.nextTick(() => {
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if ("open" !== client.conn.readyState) {
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debug("next called after client was closed - ignoring socket");
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socket._cleanup();
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return;
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}
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if (err) {
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debug("middleware error, sending CONNECT_ERROR packet to the client");
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socket._cleanup();
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if (client.conn.protocol === 3) {
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return socket._error(err.data || err.message);
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}
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else {
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return socket._error({
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message: err.message,
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data: err.data,
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});
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}
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}
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this._doConnect(socket, fn);
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});
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});
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}
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async _createSocket(client, auth) {
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const sessionId = auth.pid;
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const offset = auth.offset;
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if (
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// @ts-ignore
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this.server.opts.connectionStateRecovery &&
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typeof sessionId === "string" &&
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typeof offset === "string") {
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let session;
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try {
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session = await this.adapter.restoreSession(sessionId, offset);
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}
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catch (e) {
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debug("error while restoring session: %s", e);
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}
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if (session) {
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debug("connection state recovered for sid %s", session.sid);
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return new socket_1.Socket(this, client, auth, session);
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}
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}
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return new socket_1.Socket(this, client, auth);
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}
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_doConnect(socket, fn) {
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// track socket
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this.sockets.set(socket.id, socket);
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// it's paramount that the internal `onconnect` logic
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// fires before user-set events to prevent state order
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// violations (such as a disconnection before the connection
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// logic is complete)
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socket._onconnect();
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if (fn)
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fn(socket);
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// fire user-set events
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this.emitReserved("connect", socket);
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this.emitReserved("connection", socket);
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}
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/**
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* Removes a client. Called by each `Socket`.
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*
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* @private
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*/
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_remove(socket) {
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if (this.sockets.has(socket.id)) {
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this.sockets.delete(socket.id);
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}
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else {
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debug("ignoring remove for %s", socket.id);
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}
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}
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/**
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* Emits to all connected clients.
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*
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* @example
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* const myNamespace = io.of("/my-namespace");
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*
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* myNamespace.emit("hello", "world");
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*
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* // all serializable datastructures are supported (no need to call JSON.stringify)
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* myNamespace.emit("hello", 1, "2", { 3: ["4"], 5: Uint8Array.from([6]) });
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*
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* // with an acknowledgement from the clients
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* myNamespace.timeout(1000).emit("some-event", (err, responses) => {
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* if (err) {
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* // some clients did not acknowledge the event in the given delay
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* } else {
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* console.log(responses); // one response per client
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* }
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* });
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*
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* @return Always true
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*/
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emit(ev, ...args) {
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return new broadcast_operator_1.BroadcastOperator(this.adapter).emit(ev, ...args);
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}
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/**
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* Emits an event and waits for an acknowledgement from all clients.
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*
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* @example
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* const myNamespace = io.of("/my-namespace");
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*
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* try {
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* const responses = await myNamespace.timeout(1000).emitWithAck("some-event");
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* console.log(responses); // one response per client
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* } catch (e) {
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* // some clients did not acknowledge the event in the given delay
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* }
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*
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* @return a Promise that will be fulfilled when all clients have acknowledged the event
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*/
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emitWithAck(ev, ...args) {
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return new broadcast_operator_1.BroadcastOperator(this.adapter).emitWithAck(ev, ...args);
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}
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/**
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* Sends a `message` event to all clients.
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*
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* This method mimics the WebSocket.send() method.
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*
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* @see https://developer.mozilla.org/en-US/docs/Web/API/WebSocket/send
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*
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* @example
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* const myNamespace = io.of("/my-namespace");
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*
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* myNamespace.send("hello");
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*
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* // this is equivalent to
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* myNamespace.emit("message", "hello");
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*
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* @return self
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*/
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send(...args) {
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this.emit("message", ...args);
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return this;
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}
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/**
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* Sends a `message` event to all clients. Sends a `message` event. Alias of {@link send}.
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*
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* @return self
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*/
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write(...args) {
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this.emit("message", ...args);
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return this;
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}
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/**
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* Sends a message to the other Socket.IO servers of the cluster.
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*
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* @example
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* const myNamespace = io.of("/my-namespace");
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*
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* myNamespace.serverSideEmit("hello", "world");
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*
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* myNamespace.on("hello", (arg1) => {
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* console.log(arg1); // prints "world"
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* });
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*
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* // acknowledgements (without binary content) are supported too:
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* myNamespace.serverSideEmit("ping", (err, responses) => {
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* if (err) {
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* // some servers did not acknowledge the event in the given delay
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* } else {
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* console.log(responses); // one response per server (except the current one)
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* }
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* });
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*
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* myNamespace.on("ping", (cb) => {
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* cb("pong");
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* });
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*
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* @param ev - the event name
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* @param args - an array of arguments, which may include an acknowledgement callback at the end
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*/
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serverSideEmit(ev, ...args) {
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if (exports.RESERVED_EVENTS.has(ev)) {
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throw new Error(`"${String(ev)}" is a reserved event name`);
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}
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args.unshift(ev);
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this.adapter.serverSideEmit(args);
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return true;
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}
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/**
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* Sends a message and expect an acknowledgement from the other Socket.IO servers of the cluster.
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*
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* @example
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* const myNamespace = io.of("/my-namespace");
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*
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* try {
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* const responses = await myNamespace.serverSideEmitWithAck("ping");
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* console.log(responses); // one response per server (except the current one)
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* } catch (e) {
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* // some servers did not acknowledge the event in the given delay
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* }
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*
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* @param ev - the event name
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* @param args - an array of arguments
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*
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* @return a Promise that will be fulfilled when all servers have acknowledged the event
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*/
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serverSideEmitWithAck(ev, ...args) {
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return new Promise((resolve, reject) => {
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args.push((err, responses) => {
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if (err) {
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err.responses = responses;
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return reject(err);
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}
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else {
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return resolve(responses);
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}
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});
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this.serverSideEmit(ev, ...args);
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});
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}
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/**
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* Called when a packet is received from another Socket.IO server
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*
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* @param args - an array of arguments, which may include an acknowledgement callback at the end
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*
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* @private
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*/
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_onServerSideEmit(args) {
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super.emitUntyped.apply(this, args);
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}
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/**
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* Gets a list of clients.
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*
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* @deprecated this method will be removed in the next major release, please use {@link Namespace#serverSideEmit} or
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* {@link Namespace#fetchSockets} instead.
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*/
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allSockets() {
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return new broadcast_operator_1.BroadcastOperator(this.adapter).allSockets();
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}
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/**
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* Sets the compress flag.
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*
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* @example
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* const myNamespace = io.of("/my-namespace");
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*
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* myNamespace.compress(false).emit("hello");
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*
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* @param compress - if `true`, compresses the sending data
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* @return self
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*/
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compress(compress) {
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return new broadcast_operator_1.BroadcastOperator(this.adapter).compress(compress);
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}
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/**
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* Sets a modifier for a subsequent event emission that the event data may be lost if the client is not ready to
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* receive messages (because of network slowness or other issues, or because they’re connected through long polling
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* and is in the middle of a request-response cycle).
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*
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* @example
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* const myNamespace = io.of("/my-namespace");
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*
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* myNamespace.volatile.emit("hello"); // the clients may or may not receive it
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*
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* @return self
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*/
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get volatile() {
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return new broadcast_operator_1.BroadcastOperator(this.adapter).volatile;
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}
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/**
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* Sets a modifier for a subsequent event emission that the event data will only be broadcast to the current node.
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*
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* @example
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* const myNamespace = io.of("/my-namespace");
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*
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* // the “foo” event will be broadcast to all connected clients on this node
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* myNamespace.local.emit("foo", "bar");
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*
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* @return a new {@link BroadcastOperator} instance for chaining
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*/
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get local() {
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return new broadcast_operator_1.BroadcastOperator(this.adapter).local;
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}
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/**
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* Adds a timeout in milliseconds for the next operation.
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*
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* @example
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* const myNamespace = io.of("/my-namespace");
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*
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* myNamespace.timeout(1000).emit("some-event", (err, responses) => {
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* if (err) {
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* // some clients did not acknowledge the event in the given delay
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* } else {
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* console.log(responses); // one response per client
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* }
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* });
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*
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* @param timeout
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*/
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timeout(timeout) {
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return new broadcast_operator_1.BroadcastOperator(this.adapter).timeout(timeout);
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}
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/**
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* Returns the matching socket instances.
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*
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* Note: this method also works within a cluster of multiple Socket.IO servers, with a compatible {@link Adapter}.
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*
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* @example
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* const myNamespace = io.of("/my-namespace");
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*
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* // return all Socket instances
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* const sockets = await myNamespace.fetchSockets();
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*
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* // return all Socket instances in the "room1" room
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* const sockets = await myNamespace.in("room1").fetchSockets();
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*
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* for (const socket of sockets) {
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* console.log(socket.id);
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* console.log(socket.handshake);
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* console.log(socket.rooms);
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* console.log(socket.data);
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*
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* socket.emit("hello");
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* socket.join("room1");
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* socket.leave("room2");
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* socket.disconnect();
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* }
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*/
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fetchSockets() {
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return new broadcast_operator_1.BroadcastOperator(this.adapter).fetchSockets();
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}
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/**
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* Makes the matching socket instances join the specified rooms.
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*
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* Note: this method also works within a cluster of multiple Socket.IO servers, with a compatible {@link Adapter}.
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*
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* @example
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* const myNamespace = io.of("/my-namespace");
|
||
*
|
||
* // make all socket instances join the "room1" room
|
||
* myNamespace.socketsJoin("room1");
|
||
*
|
||
* // make all socket instances in the "room1" room join the "room2" and "room3" rooms
|
||
* myNamespace.in("room1").socketsJoin(["room2", "room3"]);
|
||
*
|
||
* @param room - a room, or an array of rooms
|
||
*/
|
||
socketsJoin(room) {
|
||
return new broadcast_operator_1.BroadcastOperator(this.adapter).socketsJoin(room);
|
||
}
|
||
/**
|
||
* Makes the matching socket instances leave the specified rooms.
|
||
*
|
||
* Note: this method also works within a cluster of multiple Socket.IO servers, with a compatible {@link Adapter}.
|
||
*
|
||
* @example
|
||
* const myNamespace = io.of("/my-namespace");
|
||
*
|
||
* // make all socket instances leave the "room1" room
|
||
* myNamespace.socketsLeave("room1");
|
||
*
|
||
* // make all socket instances in the "room1" room leave the "room2" and "room3" rooms
|
||
* myNamespace.in("room1").socketsLeave(["room2", "room3"]);
|
||
*
|
||
* @param room - a room, or an array of rooms
|
||
*/
|
||
socketsLeave(room) {
|
||
return new broadcast_operator_1.BroadcastOperator(this.adapter).socketsLeave(room);
|
||
}
|
||
/**
|
||
* Makes the matching socket instances disconnect.
|
||
*
|
||
* Note: this method also works within a cluster of multiple Socket.IO servers, with a compatible {@link Adapter}.
|
||
*
|
||
* @example
|
||
* const myNamespace = io.of("/my-namespace");
|
||
*
|
||
* // make all socket instances disconnect (the connections might be kept alive for other namespaces)
|
||
* myNamespace.disconnectSockets();
|
||
*
|
||
* // make all socket instances in the "room1" room disconnect and close the underlying connections
|
||
* myNamespace.in("room1").disconnectSockets(true);
|
||
*
|
||
* @param close - whether to close the underlying connection
|
||
*/
|
||
disconnectSockets(close = false) {
|
||
return new broadcast_operator_1.BroadcastOperator(this.adapter).disconnectSockets(close);
|
||
}
|
||
}
|
||
exports.Namespace = Namespace;
|