670 lines
21 KiB
TypeScript
670 lines
21 KiB
TypeScript
/// <reference types="node" />
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/// <reference types="node" />
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import { Packet } from "socket.io-parser";
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import { AllButLast, DecorateAcknowledgements, DecorateAcknowledgementsWithMultipleResponses, DefaultEventsMap, EventNames, EventParams, EventsMap, FirstArg, Last, StrictEventEmitter } from "./typed-events";
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import type { Client } from "./client";
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import type { Namespace } from "./namespace";
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import type { IncomingHttpHeaders, IncomingMessage } from "http";
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import type { Room, Session, SocketId } from "socket.io-adapter";
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import type { ParsedUrlQuery } from "querystring";
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import { BroadcastOperator } from "./broadcast-operator";
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export declare type DisconnectReason = "transport error" | "transport close" | "forced close" | "ping timeout" | "parse error" | "server shutting down" | "forced server close" | "client namespace disconnect" | "server namespace disconnect";
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export interface SocketReservedEventsMap {
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disconnect: (reason: DisconnectReason, description?: any) => void;
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disconnecting: (reason: DisconnectReason, description?: any) => void;
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error: (err: Error) => void;
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}
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export interface EventEmitterReservedEventsMap {
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newListener: (eventName: string | Symbol, listener: (...args: any[]) => void) => void;
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removeListener: (eventName: string | Symbol, listener: (...args: any[]) => void) => void;
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}
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export declare const RESERVED_EVENTS: ReadonlySet<string | Symbol>;
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/**
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* The handshake details
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*/
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export interface Handshake {
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/**
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* The headers sent as part of the handshake
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*/
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headers: IncomingHttpHeaders;
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/**
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* The date of creation (as string)
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*/
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time: string;
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/**
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* The ip of the client
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*/
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address: string;
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/**
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* Whether the connection is cross-domain
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*/
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xdomain: boolean;
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/**
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* Whether the connection is secure
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*/
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secure: boolean;
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/**
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* The date of creation (as unix timestamp)
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*/
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issued: number;
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/**
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* The request URL string
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*/
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url: string;
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/**
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* The query object
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*/
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query: ParsedUrlQuery;
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/**
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* The auth object
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*/
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auth: {
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[key: string]: any;
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};
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}
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/**
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* `[eventName, ...args]`
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*/
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export declare type Event = [string, ...any[]];
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/**
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* This is the main object for interacting with a client.
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*
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* A Socket belongs to a given {@link Namespace} and uses an underlying {@link Client} to communicate.
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*
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* Within each {@link Namespace}, you can also define arbitrary channels (called "rooms") that the {@link Socket} can
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* join and leave. That provides a convenient way to broadcast to a group of socket instances.
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*
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* @example
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* io.on("connection", (socket) => {
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* console.log(`socket ${socket.id} connected`);
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*
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* // send an event to the client
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* socket.emit("foo", "bar");
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*
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* socket.on("foobar", () => {
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* // an event was received from the client
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* });
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*
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* // join the room named "room1"
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* socket.join("room1");
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*
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* // broadcast to everyone in the room named "room1"
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* io.to("room1").emit("hello");
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*
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* // upon disconnection
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* socket.on("disconnect", (reason) => {
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* console.log(`socket ${socket.id} disconnected due to ${reason}`);
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* });
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* });
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*/
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export declare class Socket<ListenEvents extends EventsMap = DefaultEventsMap, EmitEvents extends EventsMap = ListenEvents, ServerSideEvents extends EventsMap = DefaultEventsMap, SocketData = any> extends StrictEventEmitter<ListenEvents, EmitEvents, SocketReservedEventsMap> {
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readonly nsp: Namespace<ListenEvents, EmitEvents, ServerSideEvents>;
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readonly client: Client<ListenEvents, EmitEvents, ServerSideEvents>;
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/**
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* An unique identifier for the session.
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*/
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readonly id: SocketId;
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/**
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* Whether the connection state was recovered after a temporary disconnection. In that case, any missed packets will
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* be transmitted to the client, the data attribute and the rooms will be restored.
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*/
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readonly recovered: boolean;
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/**
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* The handshake details.
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*/
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readonly handshake: Handshake;
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/**
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* Additional information that can be attached to the Socket instance and which will be used in the
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* {@link Server.fetchSockets()} method.
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*/
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data: Partial<SocketData>;
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/**
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* Whether the socket is currently connected or not.
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*
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* @example
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* io.use((socket, next) => {
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* console.log(socket.connected); // false
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* next();
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* });
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*
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* io.on("connection", (socket) => {
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* console.log(socket.connected); // true
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* });
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*/
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connected: boolean;
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/**
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* The session ID, which must not be shared (unlike {@link id}).
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*
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* @private
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*/
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private readonly pid;
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private readonly server;
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private readonly adapter;
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private acks;
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private fns;
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private flags;
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private _anyListeners?;
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private _anyOutgoingListeners?;
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/**
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* Interface to a `Client` for a given `Namespace`.
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*
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* @param {Namespace} nsp
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* @param {Client} client
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* @param {Object} auth
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* @package
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*/
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constructor(nsp: Namespace<ListenEvents, EmitEvents, ServerSideEvents>, client: Client<ListenEvents, EmitEvents, ServerSideEvents>, auth: Record<string, unknown>, previousSession?: Session);
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/**
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* Builds the `handshake` BC object
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*
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* @private
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*/
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private buildHandshake;
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/**
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* Emits to this client.
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*
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* @example
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* io.on("connection", (socket) => {
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* socket.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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* socket.emit("hello", 1, "2", { 3: ["4"], 5: Buffer.from([6]) });
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*
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* // with an acknowledgement from the client
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* socket.emit("hello", "world", (val) => {
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* // ...
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* });
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* });
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*
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* @return Always returns `true`.
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*/
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emit<Ev extends EventNames<EmitEvents>>(ev: Ev, ...args: EventParams<EmitEvents, Ev>): boolean;
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/**
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* Emits an event and waits for an acknowledgement
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*
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* @example
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* io.on("connection", async (socket) => {
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* // without timeout
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* const response = await socket.emitWithAck("hello", "world");
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*
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* // with a specific timeout
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* try {
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* const response = await socket.timeout(1000).emitWithAck("hello", "world");
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* } catch (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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* @return a Promise that will be fulfilled when the client acknowledges the event
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*/
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emitWithAck<Ev extends EventNames<EmitEvents>>(ev: Ev, ...args: AllButLast<EventParams<EmitEvents, Ev>>): Promise<FirstArg<Last<EventParams<EmitEvents, Ev>>>>;
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/**
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* @private
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*/
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private registerAckCallback;
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/**
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* Targets a room when broadcasting.
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*
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* @example
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* io.on("connection", (socket) => {
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* // the “foo” event will be broadcast to all connected clients in the “room-101” room, except this socket
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* socket.to("room-101").emit("foo", "bar");
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*
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* // the code above is equivalent to:
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* io.to("room-101").except(socket.id).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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* socket.to(["room-101", "room-102"]).emit("foo", "bar");
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*
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* // with multiple chained calls
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* socket.to("room-101").to("room-102").emit("foo", "bar");
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* });
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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: Room | Room[]): BroadcastOperator<DecorateAcknowledgementsWithMultipleResponses<EmitEvents>, SocketData>;
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/**
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* Targets a room when broadcasting. Similar to `to()`, but might feel clearer in some cases:
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*
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* @example
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* io.on("connection", (socket) => {
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* // disconnect all clients in the "room-101" room, except this socket
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* socket.in("room-101").disconnectSockets();
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* });
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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: Room | Room[]): BroadcastOperator<DecorateAcknowledgementsWithMultipleResponses<EmitEvents>, SocketData>;
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/**
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* Excludes a room when broadcasting.
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*
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* @example
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* io.on("connection", (socket) => {
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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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* // and this socket
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* socket.except("room-101").emit("foo", "bar");
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*
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* // with an array of rooms
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* socket.except(["room-101", "room-102"]).emit("foo", "bar");
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*
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* // with multiple chained calls
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* socket.except("room-101").except("room-102").emit("foo", "bar");
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* });
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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: Room | Room[]): BroadcastOperator<DecorateAcknowledgementsWithMultipleResponses<EmitEvents>, SocketData>;
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/**
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* Sends a `message` event.
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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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* io.on("connection", (socket) => {
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* socket.send("hello");
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*
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* // this is equivalent to
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* socket.emit("message", "hello");
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* });
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*
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* @return self
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*/
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send(...args: EventParams<EmitEvents, "message">): this;
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/**
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* 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: EventParams<EmitEvents, "message">): this;
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/**
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* Writes a packet.
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*
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* @param {Object} packet - packet object
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* @param {Object} opts - options
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* @private
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*/
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private packet;
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/**
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* Joins a room.
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*
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* @example
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* io.on("connection", (socket) => {
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* // join a single room
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* socket.join("room1");
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*
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* // join multiple rooms
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* socket.join(["room1", "room2"]);
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* });
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*
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* @param {String|Array} rooms - room or array of rooms
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* @return a Promise or nothing, depending on the adapter
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*/
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join(rooms: Room | Array<Room>): Promise<void> | void;
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/**
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* Leaves a room.
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*
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* @example
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* io.on("connection", (socket) => {
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* // leave a single room
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* socket.leave("room1");
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*
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* // leave multiple rooms
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* socket.leave("room1").leave("room2");
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* });
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*
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* @param {String} room
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* @return a Promise or nothing, depending on the adapter
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*/
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leave(room: string): Promise<void> | void;
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/**
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* Leave all rooms.
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*
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* @private
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*/
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private leaveAll;
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/**
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* Called by `Namespace` upon successful
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* middleware execution (ie: authorization).
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* Socket is added to namespace array before
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* call to join, so adapters can access it.
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*
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* @private
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*/
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_onconnect(): void;
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/**
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* Called with each packet. Called by `Client`.
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*
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* @param {Object} packet
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* @private
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*/
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_onpacket(packet: Packet): void;
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/**
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* Called upon event packet.
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*
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* @param {Packet} packet - packet object
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* @private
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*/
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private onevent;
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/**
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* Produces an ack callback to emit with an event.
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*
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* @param {Number} id - packet id
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* @private
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*/
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private ack;
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/**
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* Called upon ack packet.
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*
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* @private
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*/
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private onack;
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/**
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* Called upon client disconnect packet.
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*
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* @private
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*/
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private ondisconnect;
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/**
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* Handles a client error.
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*
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* @private
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*/
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_onerror(err: Error): void;
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/**
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* Called upon closing. Called by `Client`.
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*
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* @param {String} reason
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* @param description
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* @throw {Error} optional error object
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*
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* @private
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*/
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_onclose(reason: DisconnectReason, description?: any): this | undefined;
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/**
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* Makes the socket leave all the rooms it was part of and prevents it from joining any other room
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*
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* @private
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*/
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_cleanup(): void;
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/**
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* Produces an `error` packet.
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*
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* @param {Object} err - error object
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*
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* @private
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*/
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_error(err: any): void;
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/**
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* Disconnects this client.
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*
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* @example
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* io.on("connection", (socket) => {
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* // disconnect this socket (the connection might be kept alive for other namespaces)
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* socket.disconnect();
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*
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* // disconnect this socket and close the underlying connection
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* socket.disconnect(true);
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* })
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*
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* @param {Boolean} close - if `true`, closes the underlying connection
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* @return self
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*/
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disconnect(close?: boolean): this;
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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.on("connection", (socket) => {
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* socket.compress(false).emit("hello");
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* });
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*
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* @param {Boolean} compress - if `true`, compresses the sending data
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* @return {Socket} self
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*/
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compress(compress: boolean): this;
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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.on("connection", (socket) => {
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* socket.volatile.emit("hello"); // the client may or may not receive it
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* });
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*
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* @return {Socket} self
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*/
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get volatile(): this;
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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 every sockets but the
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* sender.
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*
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* @example
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* io.on("connection", (socket) => {
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* // the “foo” event will be broadcast to all connected clients, except this socket
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* socket.broadcast.emit("foo", "bar");
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* });
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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 broadcast(): BroadcastOperator<DecorateAcknowledgementsWithMultipleResponses<EmitEvents>, SocketData>;
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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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* io.on("connection", (socket) => {
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* // the “foo” event will be broadcast to all connected clients on this node, except this socket
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* socket.local.emit("foo", "bar");
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* });
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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(): BroadcastOperator<DecorateAcknowledgementsWithMultipleResponses<EmitEvents>, SocketData>;
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/**
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* Sets a modifier for a subsequent event emission that the callback will be called with an error when the
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* given number of milliseconds have elapsed without an acknowledgement from the client:
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*
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* @example
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* io.on("connection", (socket) => {
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* socket.timeout(5000).emit("my-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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* @returns self
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*/
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timeout(timeout: number): Socket<ListenEvents, DecorateAcknowledgements<EmitEvents>, ServerSideEvents, SocketData>;
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/**
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* Dispatch incoming event to socket listeners.
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*
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* @param {Array} event - event that will get emitted
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* @private
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*/
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private dispatch;
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/**
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* Sets up socket middleware.
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*
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* @example
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* io.on("connection", (socket) => {
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* socket.use(([event, ...args], next) => {
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* if (isUnauthorized(event)) {
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* return next(new Error("unauthorized event"));
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* }
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* // do not forget to call next
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* next();
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* });
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*
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* socket.on("error", (err) => {
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* if (err && err.message === "unauthorized event") {
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* socket.disconnect();
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* }
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* });
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* });
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*
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* @param {Function} fn - middleware function (event, next)
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* @return {Socket} self
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*/
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use(fn: (event: Event, next: (err?: Error) => void) => void): this;
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/**
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* Executes the middleware for an incoming event.
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*
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* @param {Array} event - event that will get emitted
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* @param {Function} fn - last fn call in the middleware
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* @private
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*/
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private run;
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/**
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* Whether the socket is currently disconnected
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*/
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get disconnected(): boolean;
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/**
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* A reference to the request that originated the underlying Engine.IO Socket.
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*/
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get request(): IncomingMessage;
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/**
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* A reference to the underlying Client transport connection (Engine.IO Socket object).
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*
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* @example
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* io.on("connection", (socket) => {
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* console.log(socket.conn.transport.name); // prints "polling" or "websocket"
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*
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* socket.conn.once("upgrade", () => {
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||
* console.log(socket.conn.transport.name); // prints "websocket"
|
||
* });
|
||
* });
|
||
*/
|
||
get conn(): import("engine.io").Socket;
|
||
/**
|
||
* Returns the rooms the socket is currently in.
|
||
*
|
||
* @example
|
||
* io.on("connection", (socket) => {
|
||
* console.log(socket.rooms); // Set { <socket.id> }
|
||
*
|
||
* socket.join("room1");
|
||
*
|
||
* console.log(socket.rooms); // Set { <socket.id>, "room1" }
|
||
* });
|
||
*/
|
||
get rooms(): Set<Room>;
|
||
/**
|
||
* Adds a listener that will be fired when any event is received. The event name is passed as the first argument to
|
||
* the callback.
|
||
*
|
||
* @example
|
||
* io.on("connection", (socket) => {
|
||
* socket.onAny((event, ...args) => {
|
||
* console.log(`got event ${event}`);
|
||
* });
|
||
* });
|
||
*
|
||
* @param listener
|
||
*/
|
||
onAny(listener: (...args: any[]) => void): this;
|
||
/**
|
||
* Adds a listener that will be fired when any event is received. The event name is passed as the first argument to
|
||
* the callback. The listener is added to the beginning of the listeners array.
|
||
*
|
||
* @param listener
|
||
*/
|
||
prependAny(listener: (...args: any[]) => void): this;
|
||
/**
|
||
* Removes the listener that will be fired when any event is received.
|
||
*
|
||
* @example
|
||
* io.on("connection", (socket) => {
|
||
* const catchAllListener = (event, ...args) => {
|
||
* console.log(`got event ${event}`);
|
||
* }
|
||
*
|
||
* socket.onAny(catchAllListener);
|
||
*
|
||
* // remove a specific listener
|
||
* socket.offAny(catchAllListener);
|
||
*
|
||
* // or remove all listeners
|
||
* socket.offAny();
|
||
* });
|
||
*
|
||
* @param listener
|
||
*/
|
||
offAny(listener?: (...args: any[]) => void): this;
|
||
/**
|
||
* Returns an array of listeners that are listening for any event that is specified. This array can be manipulated,
|
||
* e.g. to remove listeners.
|
||
*/
|
||
listenersAny(): ((...args: any[]) => void)[];
|
||
/**
|
||
* Adds a listener that will be fired when any event is sent. The event name is passed as the first argument to
|
||
* the callback.
|
||
*
|
||
* Note: acknowledgements sent to the client are not included.
|
||
*
|
||
* @example
|
||
* io.on("connection", (socket) => {
|
||
* socket.onAnyOutgoing((event, ...args) => {
|
||
* console.log(`sent event ${event}`);
|
||
* });
|
||
* });
|
||
*
|
||
* @param listener
|
||
*/
|
||
onAnyOutgoing(listener: (...args: any[]) => void): this;
|
||
/**
|
||
* Adds a listener that will be fired when any event is emitted. The event name is passed as the first argument to the
|
||
* callback. The listener is added to the beginning of the listeners array.
|
||
*
|
||
* @example
|
||
* io.on("connection", (socket) => {
|
||
* socket.prependAnyOutgoing((event, ...args) => {
|
||
* console.log(`sent event ${event}`);
|
||
* });
|
||
* });
|
||
*
|
||
* @param listener
|
||
*/
|
||
prependAnyOutgoing(listener: (...args: any[]) => void): this;
|
||
/**
|
||
* Removes the listener that will be fired when any event is sent.
|
||
*
|
||
* @example
|
||
* io.on("connection", (socket) => {
|
||
* const catchAllListener = (event, ...args) => {
|
||
* console.log(`sent event ${event}`);
|
||
* }
|
||
*
|
||
* socket.onAnyOutgoing(catchAllListener);
|
||
*
|
||
* // remove a specific listener
|
||
* socket.offAnyOutgoing(catchAllListener);
|
||
*
|
||
* // or remove all listeners
|
||
* socket.offAnyOutgoing();
|
||
* });
|
||
*
|
||
* @param listener - the catch-all listener
|
||
*/
|
||
offAnyOutgoing(listener?: (...args: any[]) => void): this;
|
||
/**
|
||
* Returns an array of listeners that are listening for any event that is specified. This array can be manipulated,
|
||
* e.g. to remove listeners.
|
||
*/
|
||
listenersAnyOutgoing(): ((...args: any[]) => void)[];
|
||
/**
|
||
* Notify the listeners for each packet sent (emit or broadcast)
|
||
*
|
||
* @param packet
|
||
*
|
||
* @private
|
||
*/
|
||
private notifyOutgoingListeners;
|
||
private newBroadcastOperator;
|
||
}
|