438 lines
15 KiB
JavaScript
438 lines
15 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.RemoteSocket = exports.BroadcastOperator = void 0;
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const socket_1 = require("./socket");
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const socket_io_parser_1 = require("socket.io-parser");
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class BroadcastOperator {
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constructor(adapter, rooms = new Set(), exceptRooms = new Set(), flags = {}) {
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this.adapter = adapter;
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this.rooms = rooms;
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this.exceptRooms = exceptRooms;
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this.flags = flags;
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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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* // the “foo” event will be broadcast to all connected clients in the “room-101” room
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* io.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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* io.to(["room-101", "room-102"]).emit("foo", "bar");
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*
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* // with multiple chained calls
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* io.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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const rooms = new Set(this.rooms);
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if (Array.isArray(room)) {
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room.forEach((r) => rooms.add(r));
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}
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else {
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rooms.add(room);
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}
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return new BroadcastOperator(this.adapter, rooms, this.exceptRooms, this.flags);
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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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* // disconnect all clients in the "room-101" room
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* io.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 this.to(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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* // the "foo" event will be broadcast to all connected clients, except the ones that are in the "room-101" room
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* io.except("room-101").emit("foo", "bar");
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*
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* // with an array of rooms
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* io.except(["room-101", "room-102"]).emit("foo", "bar");
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*
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* // with multiple chained calls
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* io.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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const exceptRooms = new Set(this.exceptRooms);
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if (Array.isArray(room)) {
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room.forEach((r) => exceptRooms.add(r));
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}
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else {
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exceptRooms.add(room);
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}
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return new BroadcastOperator(this.adapter, this.rooms, exceptRooms, this.flags);
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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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* io.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 a new BroadcastOperator instance
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*/
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compress(compress) {
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const flags = Object.assign({}, this.flags, { compress });
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return new BroadcastOperator(this.adapter, this.rooms, this.exceptRooms, flags);
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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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* io.volatile.emit("hello"); // the clients may or may not receive it
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*
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* @return a new BroadcastOperator instance
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*/
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get volatile() {
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const flags = Object.assign({}, this.flags, { volatile: true });
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return new BroadcastOperator(this.adapter, this.rooms, this.exceptRooms, flags);
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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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* // the “foo” event will be broadcast to all connected clients on this node
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* io.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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const flags = Object.assign({}, this.flags, { local: true });
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return new BroadcastOperator(this.adapter, this.rooms, this.exceptRooms, flags);
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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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* io.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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const flags = Object.assign({}, this.flags, { timeout });
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return new BroadcastOperator(this.adapter, this.rooms, this.exceptRooms, flags);
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}
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/**
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* Emits to all clients.
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*
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* @example
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* // the “foo” event will be broadcast to all connected clients
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* io.emit("foo", "bar");
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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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* io.to("room-101").emit("foo", "bar");
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*
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* // with an acknowledgement expected from all connected clients
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* io.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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if (socket_1.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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// set up packet object
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const data = [ev, ...args];
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const packet = {
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type: socket_io_parser_1.PacketType.EVENT,
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data: data,
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};
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const withAck = typeof data[data.length - 1] === "function";
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if (!withAck) {
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this.adapter.broadcast(packet, {
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rooms: this.rooms,
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except: this.exceptRooms,
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flags: this.flags,
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});
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return true;
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}
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const ack = data.pop();
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let timedOut = false;
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let responses = [];
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const timer = setTimeout(() => {
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timedOut = true;
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ack.apply(this, [
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new Error("operation has timed out"),
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this.flags.expectSingleResponse ? null : responses,
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]);
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}, this.flags.timeout);
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let expectedServerCount = -1;
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let actualServerCount = 0;
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let expectedClientCount = 0;
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const checkCompleteness = () => {
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if (!timedOut &&
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expectedServerCount === actualServerCount &&
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responses.length === expectedClientCount) {
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clearTimeout(timer);
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ack.apply(this, [
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null,
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this.flags.expectSingleResponse ? null : responses,
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]);
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}
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};
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this.adapter.broadcastWithAck(packet, {
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rooms: this.rooms,
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except: this.exceptRooms,
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flags: this.flags,
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}, (clientCount) => {
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// each Socket.IO server in the cluster sends the number of clients that were notified
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expectedClientCount += clientCount;
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actualServerCount++;
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checkCompleteness();
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}, (clientResponse) => {
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// each client sends an acknowledgement
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responses.push(clientResponse);
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checkCompleteness();
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});
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this.adapter.serverCount().then((serverCount) => {
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expectedServerCount = serverCount;
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checkCompleteness();
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});
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return true;
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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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* try {
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* const responses = await io.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 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.emit(ev, ...args);
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});
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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 Server#serverSideEmit} or
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* {@link fetchSockets} instead.
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*/
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allSockets() {
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if (!this.adapter) {
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throw new Error("No adapter for this namespace, are you trying to get the list of clients of a dynamic namespace?");
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}
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return this.adapter.sockets(this.rooms);
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}
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/**
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* Returns the matching socket instances. This method works across a cluster of several Socket.IO servers.
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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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* // return all Socket instances
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* const sockets = await io.fetchSockets();
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*
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* // return all Socket instances in the "room1" room
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* const sockets = await io.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 this.adapter
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.fetchSockets({
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rooms: this.rooms,
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except: this.exceptRooms,
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flags: this.flags,
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})
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.then((sockets) => {
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return sockets.map((socket) => {
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if (socket instanceof socket_1.Socket) {
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// FIXME the TypeScript compiler complains about missing private properties
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return socket;
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}
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else {
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return new RemoteSocket(this.adapter, socket);
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}
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});
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});
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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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*
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* // make all socket instances join the "room1" room
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* io.socketsJoin("room1");
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*
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* // make all socket instances in the "room1" room join the "room2" and "room3" rooms
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* io.in("room1").socketsJoin(["room2", "room3"]);
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*
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* @param room - a room, or an array of rooms
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*/
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socketsJoin(room) {
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this.adapter.addSockets({
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rooms: this.rooms,
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except: this.exceptRooms,
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flags: this.flags,
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}, Array.isArray(room) ? room : [room]);
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}
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/**
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* Makes the matching socket instances leave 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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* // make all socket instances leave the "room1" room
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* io.socketsLeave("room1");
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*
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* // make all socket instances in the "room1" room leave the "room2" and "room3" rooms
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* io.in("room1").socketsLeave(["room2", "room3"]);
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*
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* @param room - a room, or an array of rooms
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*/
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socketsLeave(room) {
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this.adapter.delSockets({
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rooms: this.rooms,
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except: this.exceptRooms,
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flags: this.flags,
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}, Array.isArray(room) ? room : [room]);
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}
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/**
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* Makes the matching socket instances disconnect.
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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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* // make all socket instances disconnect (the connections might be kept alive for other namespaces)
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* io.disconnectSockets();
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*
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* // make all socket instances in the "room1" room disconnect and close the underlying connections
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* io.in("room1").disconnectSockets(true);
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*
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* @param close - whether to close the underlying connection
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*/
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disconnectSockets(close = false) {
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this.adapter.disconnectSockets({
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rooms: this.rooms,
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except: this.exceptRooms,
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flags: this.flags,
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}, close);
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}
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}
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exports.BroadcastOperator = BroadcastOperator;
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/**
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* Expose of subset of the attributes and methods of the Socket class
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*/
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class RemoteSocket {
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constructor(adapter, details) {
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this.id = details.id;
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this.handshake = details.handshake;
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this.rooms = new Set(details.rooms);
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this.data = details.data;
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this.operator = new BroadcastOperator(adapter, new Set([this.id]), new Set(), {
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expectSingleResponse: true, // so that remoteSocket.emit() with acknowledgement behaves like socket.emit()
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});
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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 sockets = await io.fetchSockets();
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*
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* for (const socket of sockets) {
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* if (someCondition) {
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* socket.timeout(1000).emit("some-event", (err) => {
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* if (err) {
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* // the client did not acknowledge the event in the given delay
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* }
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* });
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* }
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* }
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*
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* // note: if possible, using a room instead of looping over all sockets is preferable
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* io.timeout(1000).to(someConditionRoom).emit("some-event", (err, responses) => {
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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 this.operator.timeout(timeout);
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}
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emit(ev, ...args) {
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return this.operator.emit(ev, ...args);
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}
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/**
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* Joins a room.
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*
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* @param {String|Array} room - room or array of rooms
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*/
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join(room) {
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return this.operator.socketsJoin(room);
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}
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/**
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* Leaves a room.
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*
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* @param {String} room
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*/
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leave(room) {
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return this.operator.socketsLeave(room);
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}
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/**
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* Disconnects this client.
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*
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* @param {Boolean} close - if `true`, closes the underlying connection
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* @return {Socket} self
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*/
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disconnect(close = false) {
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this.operator.disconnectSockets(close);
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return this;
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}
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}
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exports.RemoteSocket = RemoteSocket;
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