You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
395 lines
13 KiB
JavaScript
395 lines
13 KiB
JavaScript
"use strict";
|
|
var _a;
|
|
Object.defineProperty(exports, "__esModule", { value: true });
|
|
exports.SessionAwareAdapter = exports.Adapter = void 0;
|
|
const events_1 = require("events");
|
|
const yeast_1 = require("./contrib/yeast");
|
|
const WebSocket = require("ws");
|
|
const canPreComputeFrame = typeof ((_a = WebSocket === null || WebSocket === void 0 ? void 0 : WebSocket.Sender) === null || _a === void 0 ? void 0 : _a.frame) === "function";
|
|
class Adapter extends events_1.EventEmitter {
|
|
/**
|
|
* In-memory adapter constructor.
|
|
*
|
|
* @param {Namespace} nsp
|
|
*/
|
|
constructor(nsp) {
|
|
super();
|
|
this.nsp = nsp;
|
|
this.rooms = new Map();
|
|
this.sids = new Map();
|
|
this.encoder = nsp.server.encoder;
|
|
}
|
|
/**
|
|
* To be overridden
|
|
*/
|
|
init() { }
|
|
/**
|
|
* To be overridden
|
|
*/
|
|
close() { }
|
|
/**
|
|
* Returns the number of Socket.IO servers in the cluster
|
|
*
|
|
* @public
|
|
*/
|
|
serverCount() {
|
|
return Promise.resolve(1);
|
|
}
|
|
/**
|
|
* Adds a socket to a list of room.
|
|
*
|
|
* @param {SocketId} id the socket id
|
|
* @param {Set<Room>} rooms a set of rooms
|
|
* @public
|
|
*/
|
|
addAll(id, rooms) {
|
|
if (!this.sids.has(id)) {
|
|
this.sids.set(id, new Set());
|
|
}
|
|
for (const room of rooms) {
|
|
this.sids.get(id).add(room);
|
|
if (!this.rooms.has(room)) {
|
|
this.rooms.set(room, new Set());
|
|
this.emit("create-room", room);
|
|
}
|
|
if (!this.rooms.get(room).has(id)) {
|
|
this.rooms.get(room).add(id);
|
|
this.emit("join-room", room, id);
|
|
}
|
|
}
|
|
}
|
|
/**
|
|
* Removes a socket from a room.
|
|
*
|
|
* @param {SocketId} id the socket id
|
|
* @param {Room} room the room name
|
|
*/
|
|
del(id, room) {
|
|
if (this.sids.has(id)) {
|
|
this.sids.get(id).delete(room);
|
|
}
|
|
this._del(room, id);
|
|
}
|
|
_del(room, id) {
|
|
const _room = this.rooms.get(room);
|
|
if (_room != null) {
|
|
const deleted = _room.delete(id);
|
|
if (deleted) {
|
|
this.emit("leave-room", room, id);
|
|
}
|
|
if (_room.size === 0 && this.rooms.delete(room)) {
|
|
this.emit("delete-room", room);
|
|
}
|
|
}
|
|
}
|
|
/**
|
|
* Removes a socket from all rooms it's joined.
|
|
*
|
|
* @param {SocketId} id the socket id
|
|
*/
|
|
delAll(id) {
|
|
if (!this.sids.has(id)) {
|
|
return;
|
|
}
|
|
for (const room of this.sids.get(id)) {
|
|
this._del(room, id);
|
|
}
|
|
this.sids.delete(id);
|
|
}
|
|
/**
|
|
* Broadcasts a packet.
|
|
*
|
|
* Options:
|
|
* - `flags` {Object} flags for this packet
|
|
* - `except` {Array} sids that should be excluded
|
|
* - `rooms` {Array} list of rooms to broadcast to
|
|
*
|
|
* @param {Object} packet the packet object
|
|
* @param {Object} opts the options
|
|
* @public
|
|
*/
|
|
broadcast(packet, opts) {
|
|
const flags = opts.flags || {};
|
|
const packetOpts = {
|
|
preEncoded: true,
|
|
volatile: flags.volatile,
|
|
compress: flags.compress,
|
|
};
|
|
packet.nsp = this.nsp.name;
|
|
const encodedPackets = this._encode(packet, packetOpts);
|
|
this.apply(opts, (socket) => {
|
|
if (typeof socket.notifyOutgoingListeners === "function") {
|
|
socket.notifyOutgoingListeners(packet);
|
|
}
|
|
socket.client.writeToEngine(encodedPackets, packetOpts);
|
|
});
|
|
}
|
|
/**
|
|
* Broadcasts a packet and expects multiple acknowledgements.
|
|
*
|
|
* Options:
|
|
* - `flags` {Object} flags for this packet
|
|
* - `except` {Array} sids that should be excluded
|
|
* - `rooms` {Array} list of rooms to broadcast to
|
|
*
|
|
* @param {Object} packet the packet object
|
|
* @param {Object} opts the options
|
|
* @param clientCountCallback - the number of clients that received the packet
|
|
* @param ack - the callback that will be called for each client response
|
|
*
|
|
* @public
|
|
*/
|
|
broadcastWithAck(packet, opts, clientCountCallback, ack) {
|
|
const flags = opts.flags || {};
|
|
const packetOpts = {
|
|
preEncoded: true,
|
|
volatile: flags.volatile,
|
|
compress: flags.compress,
|
|
};
|
|
packet.nsp = this.nsp.name;
|
|
// we can use the same id for each packet, since the _ids counter is common (no duplicate)
|
|
packet.id = this.nsp._ids++;
|
|
const encodedPackets = this._encode(packet, packetOpts);
|
|
let clientCount = 0;
|
|
this.apply(opts, (socket) => {
|
|
// track the total number of acknowledgements that are expected
|
|
clientCount++;
|
|
// call the ack callback for each client response
|
|
socket.acks.set(packet.id, ack);
|
|
if (typeof socket.notifyOutgoingListeners === "function") {
|
|
socket.notifyOutgoingListeners(packet);
|
|
}
|
|
socket.client.writeToEngine(encodedPackets, packetOpts);
|
|
});
|
|
clientCountCallback(clientCount);
|
|
}
|
|
_encode(packet, packetOpts) {
|
|
const encodedPackets = this.encoder.encode(packet);
|
|
if (canPreComputeFrame &&
|
|
encodedPackets.length === 1 &&
|
|
typeof encodedPackets[0] === "string") {
|
|
// "4" being the "message" packet type in the Engine.IO protocol
|
|
const data = Buffer.from("4" + encodedPackets[0]);
|
|
// see https://github.com/websockets/ws/issues/617#issuecomment-283002469
|
|
packetOpts.wsPreEncodedFrame = WebSocket.Sender.frame(data, {
|
|
readOnly: false,
|
|
mask: false,
|
|
rsv1: false,
|
|
opcode: 1,
|
|
fin: true,
|
|
});
|
|
}
|
|
return encodedPackets;
|
|
}
|
|
/**
|
|
* Gets a list of sockets by sid.
|
|
*
|
|
* @param {Set<Room>} rooms the explicit set of rooms to check.
|
|
*/
|
|
sockets(rooms) {
|
|
const sids = new Set();
|
|
this.apply({ rooms }, (socket) => {
|
|
sids.add(socket.id);
|
|
});
|
|
return Promise.resolve(sids);
|
|
}
|
|
/**
|
|
* Gets the list of rooms a given socket has joined.
|
|
*
|
|
* @param {SocketId} id the socket id
|
|
*/
|
|
socketRooms(id) {
|
|
return this.sids.get(id);
|
|
}
|
|
/**
|
|
* Returns the matching socket instances
|
|
*
|
|
* @param opts - the filters to apply
|
|
*/
|
|
fetchSockets(opts) {
|
|
const sockets = [];
|
|
this.apply(opts, (socket) => {
|
|
sockets.push(socket);
|
|
});
|
|
return Promise.resolve(sockets);
|
|
}
|
|
/**
|
|
* Makes the matching socket instances join the specified rooms
|
|
*
|
|
* @param opts - the filters to apply
|
|
* @param rooms - the rooms to join
|
|
*/
|
|
addSockets(opts, rooms) {
|
|
this.apply(opts, (socket) => {
|
|
socket.join(rooms);
|
|
});
|
|
}
|
|
/**
|
|
* Makes the matching socket instances leave the specified rooms
|
|
*
|
|
* @param opts - the filters to apply
|
|
* @param rooms - the rooms to leave
|
|
*/
|
|
delSockets(opts, rooms) {
|
|
this.apply(opts, (socket) => {
|
|
rooms.forEach((room) => socket.leave(room));
|
|
});
|
|
}
|
|
/**
|
|
* Makes the matching socket instances disconnect
|
|
*
|
|
* @param opts - the filters to apply
|
|
* @param close - whether to close the underlying connection
|
|
*/
|
|
disconnectSockets(opts, close) {
|
|
this.apply(opts, (socket) => {
|
|
socket.disconnect(close);
|
|
});
|
|
}
|
|
apply(opts, callback) {
|
|
const rooms = opts.rooms;
|
|
const except = this.computeExceptSids(opts.except);
|
|
if (rooms.size) {
|
|
const ids = new Set();
|
|
for (const room of rooms) {
|
|
if (!this.rooms.has(room))
|
|
continue;
|
|
for (const id of this.rooms.get(room)) {
|
|
if (ids.has(id) || except.has(id))
|
|
continue;
|
|
const socket = this.nsp.sockets.get(id);
|
|
if (socket) {
|
|
callback(socket);
|
|
ids.add(id);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
for (const [id] of this.sids) {
|
|
if (except.has(id))
|
|
continue;
|
|
const socket = this.nsp.sockets.get(id);
|
|
if (socket)
|
|
callback(socket);
|
|
}
|
|
}
|
|
}
|
|
computeExceptSids(exceptRooms) {
|
|
const exceptSids = new Set();
|
|
if (exceptRooms && exceptRooms.size > 0) {
|
|
for (const room of exceptRooms) {
|
|
if (this.rooms.has(room)) {
|
|
this.rooms.get(room).forEach((sid) => exceptSids.add(sid));
|
|
}
|
|
}
|
|
}
|
|
return exceptSids;
|
|
}
|
|
/**
|
|
* Send a packet to the other Socket.IO servers in the cluster
|
|
* @param packet - an array of arguments, which may include an acknowledgement callback at the end
|
|
*/
|
|
serverSideEmit(packet) {
|
|
console.warn("this adapter does not support the serverSideEmit() functionality");
|
|
}
|
|
/**
|
|
* Save the client session in order to restore it upon reconnection.
|
|
*/
|
|
persistSession(session) { }
|
|
/**
|
|
* Restore the session and find the packets that were missed by the client.
|
|
* @param pid
|
|
* @param offset
|
|
*/
|
|
restoreSession(pid, offset) {
|
|
return null;
|
|
}
|
|
}
|
|
exports.Adapter = Adapter;
|
|
class SessionAwareAdapter extends Adapter {
|
|
constructor(nsp) {
|
|
super(nsp);
|
|
this.nsp = nsp;
|
|
this.sessions = new Map();
|
|
this.packets = [];
|
|
this.maxDisconnectionDuration =
|
|
nsp.server.opts.connectionStateRecovery.maxDisconnectionDuration;
|
|
const timer = setInterval(() => {
|
|
const threshold = Date.now() - this.maxDisconnectionDuration;
|
|
this.sessions.forEach((session, sessionId) => {
|
|
const hasExpired = session.disconnectedAt < threshold;
|
|
if (hasExpired) {
|
|
this.sessions.delete(sessionId);
|
|
}
|
|
});
|
|
for (let i = this.packets.length - 1; i >= 0; i--) {
|
|
const hasExpired = this.packets[i].emittedAt < threshold;
|
|
if (hasExpired) {
|
|
this.packets.splice(0, i + 1);
|
|
break;
|
|
}
|
|
}
|
|
}, 60 * 1000);
|
|
// prevents the timer from keeping the process alive
|
|
timer.unref();
|
|
}
|
|
persistSession(session) {
|
|
session.disconnectedAt = Date.now();
|
|
this.sessions.set(session.pid, session);
|
|
}
|
|
restoreSession(pid, offset) {
|
|
const session = this.sessions.get(pid);
|
|
if (!session) {
|
|
// the session may have expired
|
|
return null;
|
|
}
|
|
const hasExpired = session.disconnectedAt + this.maxDisconnectionDuration < Date.now();
|
|
if (hasExpired) {
|
|
// the session has expired
|
|
this.sessions.delete(pid);
|
|
return null;
|
|
}
|
|
const index = this.packets.findIndex((packet) => packet.id === offset);
|
|
if (index === -1) {
|
|
// the offset may be too old
|
|
return null;
|
|
}
|
|
const missedPackets = [];
|
|
for (let i = index + 1; i < this.packets.length; i++) {
|
|
const packet = this.packets[i];
|
|
if (shouldIncludePacket(session.rooms, packet.opts)) {
|
|
missedPackets.push(packet.data);
|
|
}
|
|
}
|
|
return Promise.resolve(Object.assign(Object.assign({}, session), { missedPackets }));
|
|
}
|
|
broadcast(packet, opts) {
|
|
var _a;
|
|
const isEventPacket = packet.type === 2;
|
|
// packets with acknowledgement are not stored because the acknowledgement function cannot be serialized and
|
|
// restored on another server upon reconnection
|
|
const withoutAcknowledgement = packet.id === undefined;
|
|
const notVolatile = ((_a = opts.flags) === null || _a === void 0 ? void 0 : _a.volatile) === undefined;
|
|
if (isEventPacket && withoutAcknowledgement && notVolatile) {
|
|
const id = (0, yeast_1.yeast)();
|
|
// the offset is stored at the end of the data array, so the client knows the ID of the last packet it has
|
|
// processed (and the format is backward-compatible)
|
|
packet.data.push(id);
|
|
this.packets.push({
|
|
id,
|
|
opts,
|
|
data: packet.data,
|
|
emittedAt: Date.now(),
|
|
});
|
|
}
|
|
super.broadcast(packet, opts);
|
|
}
|
|
}
|
|
exports.SessionAwareAdapter = SessionAwareAdapter;
|
|
function shouldIncludePacket(sessionRooms, opts) {
|
|
const included = opts.rooms.size === 0 || sessionRooms.some((room) => opts.rooms.has(room));
|
|
const notExcluded = sessionRooms.every((room) => !opts.except.has(room));
|
|
return included && notExcluded;
|
|
}
|