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"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.Manager = void 0;
const engine_io_client_1 = require("engine.io-client");
const socket_js_1 = require("./socket.js");
const parser = __importStar(require("socket.io-parser"));
const on_js_1 = require("./on.js");
const backo2_js_1 = require("./contrib/backo2.js");
const component_emitter_1 = require("@socket.io/component-emitter");
const debug_1 = __importDefault(require("debug")); // debug()
const debug = (0, debug_1.default)("socket.io-client:manager"); // debug()
class Manager extends component_emitter_1.Emitter {
constructor(uri, opts) {
var _a;
super();
this.nsps = {};
this.subs = [];
if (uri && "object" === typeof uri) {
opts = uri;
uri = undefined;
}
opts = opts || {};
opts.path = opts.path || "/socket.io";
this.opts = opts;
(0, engine_io_client_1.installTimerFunctions)(this, opts);
this.reconnection(opts.reconnection !== false);
this.reconnectionAttempts(opts.reconnectionAttempts || Infinity);
this.reconnectionDelay(opts.reconnectionDelay || 1000);
this.reconnectionDelayMax(opts.reconnectionDelayMax || 5000);
this.randomizationFactor((_a = opts.randomizationFactor) !== null && _a !== void 0 ? _a : 0.5);
this.backoff = new backo2_js_1.Backoff({
min: this.reconnectionDelay(),
max: this.reconnectionDelayMax(),
jitter: this.randomizationFactor(),
});
this.timeout(null == opts.timeout ? 20000 : opts.timeout);
this._readyState = "closed";
this.uri = uri;
const _parser = opts.parser || parser;
this.encoder = new _parser.Encoder();
this.decoder = new _parser.Decoder();
this._autoConnect = opts.autoConnect !== false;
if (this._autoConnect)
this.open();
}
reconnection(v) {
if (!arguments.length)
return this._reconnection;
this._reconnection = !!v;
if (!v) {
this.skipReconnect = true;
}
return this;
}
reconnectionAttempts(v) {
if (v === undefined)
return this._reconnectionAttempts;
this._reconnectionAttempts = v;
return this;
}
reconnectionDelay(v) {
var _a;
if (v === undefined)
return this._reconnectionDelay;
this._reconnectionDelay = v;
(_a = this.backoff) === null || _a === void 0 ? void 0 : _a.setMin(v);
return this;
}
randomizationFactor(v) {
var _a;
if (v === undefined)
return this._randomizationFactor;
this._randomizationFactor = v;
(_a = this.backoff) === null || _a === void 0 ? void 0 : _a.setJitter(v);
return this;
}
reconnectionDelayMax(v) {
var _a;
if (v === undefined)
return this._reconnectionDelayMax;
this._reconnectionDelayMax = v;
(_a = this.backoff) === null || _a === void 0 ? void 0 : _a.setMax(v);
return this;
}
timeout(v) {
if (!arguments.length)
return this._timeout;
this._timeout = v;
return this;
}
/**
* Starts trying to reconnect if reconnection is enabled and we have not
* started reconnecting yet
*
* @private
*/
maybeReconnectOnOpen() {
// Only try to reconnect if it's the first time we're connecting
if (!this._reconnecting &&
this._reconnection &&
this.backoff.attempts === 0) {
// keeps reconnection from firing twice for the same reconnection loop
this.reconnect();
}
}
/**
* Sets the current transport `socket`.
*
* @param {Function} fn - optional, callback
* @return self
* @public
*/
open(fn) {
debug("readyState %s", this._readyState);
if (~this._readyState.indexOf("open"))
return this;
debug("opening %s", this.uri);
this.engine = new engine_io_client_1.Socket(this.uri, this.opts);
const socket = this.engine;
const self = this;
this._readyState = "opening";
this.skipReconnect = false;
// emit `open`
const openSubDestroy = (0, on_js_1.on)(socket, "open", function () {
self.onopen();
fn && fn();
});
const onError = (err) => {
debug("error");
this.cleanup();
this._readyState = "closed";
this.emitReserved("error", err);
if (fn) {
fn(err);
}
else {
// Only do this if there is no fn to handle the error
this.maybeReconnectOnOpen();
}
};
// emit `error`
const errorSub = (0, on_js_1.on)(socket, "error", onError);
if (false !== this._timeout) {
const timeout = this._timeout;
debug("connect attempt will timeout after %d", timeout);
// set timer
const timer = this.setTimeoutFn(() => {
debug("connect attempt timed out after %d", timeout);
openSubDestroy();
onError(new Error("timeout"));
socket.close();
}, timeout);
if (this.opts.autoUnref) {
timer.unref();
}
this.subs.push(() => {
this.clearTimeoutFn(timer);
});
}
this.subs.push(openSubDestroy);
this.subs.push(errorSub);
return this;
}
/**
* Alias for open()
*
* @return self
* @public
*/
connect(fn) {
return this.open(fn);
}
/**
* Called upon transport open.
*
* @private
*/
onopen() {
debug("open");
// clear old subs
this.cleanup();
// mark as open
this._readyState = "open";
this.emitReserved("open");
// add new subs
const socket = this.engine;
this.subs.push((0, on_js_1.on)(socket, "ping", this.onping.bind(this)), (0, on_js_1.on)(socket, "data", this.ondata.bind(this)), (0, on_js_1.on)(socket, "error", this.onerror.bind(this)), (0, on_js_1.on)(socket, "close", this.onclose.bind(this)),
// @ts-ignore
(0, on_js_1.on)(this.decoder, "decoded", this.ondecoded.bind(this)));
}
/**
* Called upon a ping.
*
* @private
*/
onping() {
this.emitReserved("ping");
}
/**
* Called with data.
*
* @private
*/
ondata(data) {
try {
this.decoder.add(data);
}
catch (e) {
this.onclose("parse error", e);
}
}
/**
* Called when parser fully decodes a packet.
*
* @private
*/
ondecoded(packet) {
// the nextTick call prevents an exception in a user-provided event listener from triggering a disconnection due to a "parse error"
(0, engine_io_client_1.nextTick)(() => {
this.emitReserved("packet", packet);
}, this.setTimeoutFn);
}
/**
* Called upon socket error.
*
* @private
*/
onerror(err) {
debug("error", err);
this.emitReserved("error", err);
}
/**
* Creates a new socket for the given `nsp`.
*
* @return {Socket}
* @public
*/
socket(nsp, opts) {
let socket = this.nsps[nsp];
if (!socket) {
socket = new socket_js_1.Socket(this, nsp, opts);
this.nsps[nsp] = socket;
}
else if (this._autoConnect && !socket.active) {
socket.connect();
}
return socket;
}
/**
* Called upon a socket close.
*
* @param socket
* @private
*/
_destroy(socket) {
const nsps = Object.keys(this.nsps);
for (const nsp of nsps) {
const socket = this.nsps[nsp];
if (socket.active) {
debug("socket %s is still active, skipping close", nsp);
return;
}
}
this._close();
}
/**
* Writes a packet.
*
* @param packet
* @private
*/
_packet(packet) {
debug("writing packet %j", packet);
const encodedPackets = this.encoder.encode(packet);
for (let i = 0; i < encodedPackets.length; i++) {
this.engine.write(encodedPackets[i], packet.options);
}
}
/**
* Clean up transport subscriptions and packet buffer.
*
* @private
*/
cleanup() {
debug("cleanup");
this.subs.forEach((subDestroy) => subDestroy());
this.subs.length = 0;
this.decoder.destroy();
}
/**
* Close the current socket.
*
* @private
*/
_close() {
debug("disconnect");
this.skipReconnect = true;
this._reconnecting = false;
this.onclose("forced close");
}
/**
* Alias for close()
*
* @private
*/
disconnect() {
return this._close();
}
/**
* Called when:
*
* - the low-level engine is closed
* - the parser encountered a badly formatted packet
* - all sockets are disconnected
*
* @private
*/
onclose(reason, description) {
var _a;
debug("closed due to %s", reason);
this.cleanup();
(_a = this.engine) === null || _a === void 0 ? void 0 : _a.close();
this.backoff.reset();
this._readyState = "closed";
this.emitReserved("close", reason, description);
if (this._reconnection && !this.skipReconnect) {
this.reconnect();
}
}
/**
* Attempt a reconnection.
*
* @private
*/
reconnect() {
if (this._reconnecting || this.skipReconnect)
return this;
const self = this;
if (this.backoff.attempts >= this._reconnectionAttempts) {
debug("reconnect failed");
this.backoff.reset();
this.emitReserved("reconnect_failed");
this._reconnecting = false;
}
else {
const delay = this.backoff.duration();
debug("will wait %dms before reconnect attempt", delay);
this._reconnecting = true;
const timer = this.setTimeoutFn(() => {
if (self.skipReconnect)
return;
debug("attempting reconnect");
this.emitReserved("reconnect_attempt", self.backoff.attempts);
// check again for the case socket closed in above events
if (self.skipReconnect)
return;
self.open((err) => {
if (err) {
debug("reconnect attempt error");
self._reconnecting = false;
self.reconnect();
this.emitReserved("reconnect_error", err);
}
else {
debug("reconnect success");
self.onreconnect();
}
});
}, delay);
if (this.opts.autoUnref) {
timer.unref();
}
this.subs.push(() => {
this.clearTimeoutFn(timer);
});
}
}
/**
* Called upon successful reconnect.
*
* @private
*/
onreconnect() {
const attempt = this.backoff.attempts;
this._reconnecting = false;
this.backoff.reset();
this.emitReserved("reconnect", attempt);
}
}
exports.Manager = Manager;