/*!
* Socket.IO v4.5.0
* (c) 2014-2022 Guillermo Rauch
* Released under the MIT License.
*/
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.io = factory());
})(this, (function () { 'use strict';
function _typeof(obj) {
"@babel/helpers - typeof";
if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
_typeof = function (obj) {
return typeof obj;
};
} else {
_typeof = function (obj) {
return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
};
}
return _typeof(obj);
}
function _classCallCheck(instance, Constructor) {
if (!(instance instanceof Constructor)) {
throw new TypeError("Cannot call a class as a function");
}
}
function _defineProperties(target, props) {
for (var i = 0; i < props.length; i++) {
var descriptor = props[i];
descriptor.enumerable = descriptor.enumerable || false;
descriptor.configurable = true;
if ("value" in descriptor) descriptor.writable = true;
Object.defineProperty(target, descriptor.key, descriptor);
}
}
function _createClass(Constructor, protoProps, staticProps) {
if (protoProps) _defineProperties(Constructor.prototype, protoProps);
if (staticProps) _defineProperties(Constructor, staticProps);
return Constructor;
}
function _extends() {
_extends = Object.assign || function (target) {
for (var i = 1; i < arguments.length; i++) {
var source = arguments[i];
for (var key in source) {
if (Object.prototype.hasOwnProperty.call(source, key)) {
target[key] = source[key];
}
}
}
return target;
};
return _extends.apply(this, arguments);
}
function _inherits(subClass, superClass) {
if (typeof superClass !== "function" && superClass !== null) {
throw new TypeError("Super expression must either be null or a function");
}
subClass.prototype = Object.create(superClass && superClass.prototype, {
constructor: {
value: subClass,
writable: true,
configurable: true
}
});
if (superClass) _setPrototypeOf(subClass, superClass);
}
function _getPrototypeOf(o) {
_getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
return o.__proto__ || Object.getPrototypeOf(o);
};
return _getPrototypeOf(o);
}
function _setPrototypeOf(o, p) {
_setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
o.__proto__ = p;
return o;
};
return _setPrototypeOf(o, p);
}
function _isNativeReflectConstruct() {
if (typeof Reflect === "undefined" || !Reflect.construct) return false;
if (Reflect.construct.sham) return false;
if (typeof Proxy === "function") return true;
try {
Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));
return true;
} catch (e) {
return false;
}
}
function _construct(Parent, args, Class) {
if (_isNativeReflectConstruct()) {
_construct = Reflect.construct;
} else {
_construct = function _construct(Parent, args, Class) {
var a = [null];
a.push.apply(a, args);
var Constructor = Function.bind.apply(Parent, a);
var instance = new Constructor();
if (Class) _setPrototypeOf(instance, Class.prototype);
return instance;
};
}
return _construct.apply(null, arguments);
}
function _isNativeFunction(fn) {
return Function.toString.call(fn).indexOf("[native code]") !== -1;
}
function _wrapNativeSuper(Class) {
var _cache = typeof Map === "function" ? new Map() : undefined;
_wrapNativeSuper = function _wrapNativeSuper(Class) {
if (Class === null || !_isNativeFunction(Class)) return Class;
if (typeof Class !== "function") {
throw new TypeError("Super expression must either be null or a function");
}
if (typeof _cache !== "undefined") {
if (_cache.has(Class)) return _cache.get(Class);
_cache.set(Class, Wrapper);
}
function Wrapper() {
return _construct(Class, arguments, _getPrototypeOf(this).constructor);
}
Wrapper.prototype = Object.create(Class.prototype, {
constructor: {
value: Wrapper,
enumerable: false,
writable: true,
configurable: true
}
});
return _setPrototypeOf(Wrapper, Class);
};
return _wrapNativeSuper(Class);
}
function _assertThisInitialized(self) {
if (self === void 0) {
throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
}
return self;
}
function _possibleConstructorReturn(self, call) {
if (call && (typeof call === "object" || typeof call === "function")) {
return call;
} else if (call !== void 0) {
throw new TypeError("Derived constructors may only return object or undefined");
}
return _assertThisInitialized(self);
}
function _createSuper(Derived) {
var hasNativeReflectConstruct = _isNativeReflectConstruct();
return function _createSuperInternal() {
var Super = _getPrototypeOf(Derived),
result;
if (hasNativeReflectConstruct) {
var NewTarget = _getPrototypeOf(this).constructor;
result = Reflect.construct(Super, arguments, NewTarget);
} else {
result = Super.apply(this, arguments);
}
return _possibleConstructorReturn(this, result);
};
}
function _superPropBase(object, property) {
while (!Object.prototype.hasOwnProperty.call(object, property)) {
object = _getPrototypeOf(object);
if (object === null) break;
}
return object;
}
function _get(target, property, receiver) {
if (typeof Reflect !== "undefined" && Reflect.get) {
_get = Reflect.get;
} else {
_get = function _get(target, property, receiver) {
var base = _superPropBase(target, property);
if (!base) return;
var desc = Object.getOwnPropertyDescriptor(base, property);
if (desc.get) {
return desc.get.call(receiver);
}
return desc.value;
};
}
return _get(target, property, receiver || target);
}
function _unsupportedIterableToArray(o, minLen) {
if (!o) return;
if (typeof o === "string") return _arrayLikeToArray(o, minLen);
var n = Object.prototype.toString.call(o).slice(8, -1);
if (n === "Object" && o.constructor) n = o.constructor.name;
if (n === "Map" || n === "Set") return Array.from(o);
if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
}
function _arrayLikeToArray(arr, len) {
if (len == null || len > arr.length) len = arr.length;
for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];
return arr2;
}
function _createForOfIteratorHelper(o, allowArrayLike) {
var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"];
if (!it) {
if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") {
if (it) o = it;
var i = 0;
var F = function () {};
return {
s: F,
n: function () {
if (i >= o.length) return {
done: true
};
return {
done: false,
value: o[i++]
};
},
e: function (e) {
throw e;
},
f: F
};
}
throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
}
var normalCompletion = true,
didErr = false,
err;
return {
s: function () {
it = it.call(o);
},
n: function () {
var step = it.next();
normalCompletion = step.done;
return step;
},
e: function (e) {
didErr = true;
err = e;
},
f: function () {
try {
if (!normalCompletion && it.return != null) it.return();
} finally {
if (didErr) throw err;
}
}
};
}
var PACKET_TYPES = Object.create(null); // no Map = no polyfill
PACKET_TYPES["open"] = "0";
PACKET_TYPES["close"] = "1";
PACKET_TYPES["ping"] = "2";
PACKET_TYPES["pong"] = "3";
PACKET_TYPES["message"] = "4";
PACKET_TYPES["upgrade"] = "5";
PACKET_TYPES["noop"] = "6";
var PACKET_TYPES_REVERSE = Object.create(null);
Object.keys(PACKET_TYPES).forEach(function (key) {
PACKET_TYPES_REVERSE[PACKET_TYPES[key]] = key;
});
var ERROR_PACKET = {
type: "error",
data: "parser error"
};
var withNativeBlob$1 = typeof Blob === "function" || typeof Blob !== "undefined" && Object.prototype.toString.call(Blob) === "[object BlobConstructor]";
var withNativeArrayBuffer$2 = typeof ArrayBuffer === "function"; // ArrayBuffer.isView method is not defined in IE10
var isView$1 = function isView(obj) {
return typeof ArrayBuffer.isView === "function" ? ArrayBuffer.isView(obj) : obj && obj.buffer instanceof ArrayBuffer;
};
var encodePacket = function encodePacket(_ref, supportsBinary, callback) {
var type = _ref.type,
data = _ref.data;
if (withNativeBlob$1 && data instanceof Blob) {
if (supportsBinary) {
return callback(data);
} else {
return encodeBlobAsBase64(data, callback);
}
} else if (withNativeArrayBuffer$2 && (data instanceof ArrayBuffer || isView$1(data))) {
if (supportsBinary) {
return callback(data);
} else {
return encodeBlobAsBase64(new Blob([data]), callback);
}
} // plain string
return callback(PACKET_TYPES[type] + (data || ""));
};
var encodeBlobAsBase64 = function encodeBlobAsBase64(data, callback) {
var fileReader = new FileReader();
fileReader.onload = function () {
var content = fileReader.result.split(",")[1];
callback("b" + content);
};
return fileReader.readAsDataURL(data);
};
/*
* base64-arraybuffer 1.0.1 <https://github.com/niklasvh/base64-arraybuffer>
* Copyright (c) 2022 Niklas von Hertzen <https://hertzen.com>
* Released under MIT License
*/
var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'; // Use a lookup table to find the index.
var lookup$1 = typeof Uint8Array === 'undefined' ? [] : new Uint8Array(256);
for (var i$1 = 0; i$1 < chars.length; i$1++) {
lookup$1[chars.charCodeAt(i$1)] = i$1;
}
var decode$1 = function decode(base64) {
var bufferLength = base64.length * 0.75,
len = base64.length,
i,
p = 0,
encoded1,
encoded2,
encoded3,
encoded4;
if (base64[base64.length - 1] === '=') {
bufferLength--;
if (base64[base64.length - 2] === '=') {
bufferLength--;
}
}
var arraybuffer = new ArrayBuffer(bufferLength),
bytes = new Uint8Array(arraybuffer);
for (i = 0; i < len; i += 4) {
encoded1 = lookup$1[base64.charCodeAt(i)];
encoded2 = lookup$1[base64.charCodeAt(i + 1)];
encoded3 = lookup$1[base64.charCodeAt(i + 2)];
encoded4 = lookup$1[base64.charCodeAt(i + 3)];
bytes[p++] = encoded1 << 2 | encoded2 >> 4;
bytes[p++] = (encoded2 & 15) << 4 | encoded3 >> 2;
bytes[p++] = (encoded3 & 3) << 6 | encoded4 & 63;
}
return arraybuffer;
};
var withNativeArrayBuffer$1 = typeof ArrayBuffer === "function";
var decodePacket = function decodePacket(encodedPacket, binaryType) {
if (typeof encodedPacket !== "string") {
return {
type: "message",
data: mapBinary(encodedPacket, binaryType)
};
}
var type = encodedPacket.charAt(0);
if (type === "b") {
return {
type: "message",
data: decodeBase64Packet(encodedPacket.substring(1), binaryType)
};
}
var packetType = PACKET_TYPES_REVERSE[type];
if (!packetType) {
return ERROR_PACKET;
}
return encodedPacket.length > 1 ? {
type: PACKET_TYPES_REVERSE[type],
data: encodedPacket.substring(1)
} : {
type: PACKET_TYPES_REVERSE[type]
};
};
var decodeBase64Packet = function decodeBase64Packet(data, binaryType) {
if (withNativeArrayBuffer$1) {
var decoded = decode$1(data);
return mapBinary(decoded, binaryType);
} else {
return {
base64: true,
data: data
}; // fallback for old browsers
}
};
var mapBinary = function mapBinary(data, binaryType) {
switch (binaryType) {
case "blob":
return data instanceof ArrayBuffer ? new Blob([data]) : data;
case "arraybuffer":
default:
return data;
// assuming the data is already an ArrayBuffer
}
};
var SEPARATOR = String.fromCharCode(30); // see https://en.wikipedia.org/wiki/Delimiter#ASCII_delimited_text
var encodePayload = function encodePayload(packets, callback) {
// some packets may be added to the array while encoding, so the initial length must be saved
var length = packets.length;
var encodedPackets = new Array(length);
var count = 0;
packets.forEach(function (packet, i) {
// force base64 encoding for binary packets
encodePacket(packet, false, function (encodedPacket) {
encodedPackets[i] = encodedPacket;
if (++count === length) {
callback(encodedPackets.join(SEPARATOR));
}
});
});
};
var decodePayload = function decodePayload(encodedPayload, binaryType) {
var encodedPackets = encodedPayload.split(SEPARATOR);
var packets = [];
for (var i = 0; i < encodedPackets.length; i++) {
var decodedPacket = decodePacket(encodedPackets[i], binaryType);
packets.push(decodedPacket);
if (decodedPacket.type === "error") {
break;
}
}
return packets;
};
var protocol$1 = 4;
/**
* Initialize a new `Emitter`.
*
* @api public
*/
function Emitter(obj) {
if (obj) return mixin(obj);
}
/**
* Mixin the emitter properties.
*
* @param {Object} obj
* @return {Object}
* @api private
*/
function mixin(obj) {
for (var key in Emitter.prototype) {
obj[key] = Emitter.prototype[key];
}
return obj;
}
/**
* Listen on the given `event` with `fn`.
*
* @param {String} event
* @param {Function} fn
* @return {Emitter}
* @api public
*/
Emitter.prototype.on = Emitter.prototype.addEventListener = function (event, fn) {
this._callbacks = this._callbacks || {};
(this._callbacks['$' + event] = this._callbacks['$' + event] || []).push(fn);
return this;
};
/**
* Adds an `event` listener that will be invoked a single
* time then automatically removed.
*
* @param {String} event
* @param {Function} fn
* @return {Emitter}
* @api public
*/
Emitter.prototype.once = function (event, fn) {
function on() {
this.off(event, on);
fn.apply(this, arguments);
}
on.fn = fn;
this.on(event, on);
return this;
};
/**
* Remove the given callback for `event` or all
* registered callbacks.
*
* @param {String} event
* @param {Function} fn
* @return {Emitter}
* @api public
*/
Emitter.prototype.off = Emitter.prototype.removeListener = Emitter.prototype.removeAllListeners = Emitter.prototype.removeEventListener = function (event, fn) {
this._callbacks = this._callbacks || {}; // all
if (0 == arguments.length) {
this._callbacks = {};
return this;
} // specific event
var callbacks = this._callbacks['$' + event];
if (!callbacks) return this; // remove all handlers
if (1 == arguments.length) {
delete this._callbacks['$' + event];
return this;
} // remove specific handler
var cb;
for (var i = 0; i < callbacks.length; i++) {
cb = callbacks[i];
if (cb === fn || cb.fn === fn) {
callbacks.splice(i, 1);
break;
}
} // Remove event specific arrays for event types that no
// one is subscribed for to avoid memory leak.
if (callbacks.length === 0) {
delete this._callbacks['$' + event];
}
return this;
};
/**
* Emit `event` with the given args.
*
* @param {String} event
* @param {Mixed} ...
* @return {Emitter}
*/
Emitter.prototype.emit = function (event) {
this._callbacks = this._callbacks || {};
var args = new Array(arguments.length - 1),
callbacks = this._callbacks['$' + event];
for (var i = 1; i < arguments.length; i++) {
args[i - 1] = arguments[i];
}
if (callbacks) {
callbacks = callbacks.slice(0);
for (var i = 0, len = callbacks.length; i < len; ++i) {
callbacks[i].apply(this, args);
}
}
return this;
}; // alias used for reserved events (protected method)
Emitter.prototype.emitReserved = Emitter.prototype.emit;
/**
* Return array of callbacks for `event`.
*
* @param {String} event
* @return {Array}
* @api public
*/
Emitter.prototype.listeners = function (event) {
this._callbacks = this._callbacks || {};
return this._callbacks['$' + event] || [];
};
/**
* Check if this emitter has `event` handlers.
*
* @param {String} event
* @return {Boolean}
* @api public
*/
Emitter.prototype.hasListeners = function (event) {
return !!this.listeners(event).length;
};
var globalThis = (function () {
if (typeof self !== "undefined") {
return self;
} else if (typeof window !== "undefined") {
return window;
} else {
return Function("return this")();
}
})();
function pick(obj) {
for (var _len = arguments.length, attr = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
attr[_key - 1] = arguments[_key];
}
return attr.reduce(function (acc, k) {
if (obj.hasOwnProperty(k)) {
acc[k] = obj[k];
}
return acc;
}, {});
} // Keep a reference to the real timeout functions so they can be used when overridden
var NATIVE_SET_TIMEOUT = setTimeout;
var NATIVE_CLEAR_TIMEOUT = clearTimeout;
function installTimerFunctions(obj, opts) {
if (opts.useNativeTimers) {
obj.setTimeoutFn = NATIVE_SET_TIMEOUT.bind(globalThis);
obj.clearTimeoutFn = NATIVE_CLEAR_TIMEOUT.bind(globalThis);
} else {
obj.setTimeoutFn = setTimeout.bind(globalThis);
obj.clearTimeoutFn = clearTimeout.bind(globalThis);
}
} // base64 encoded buffers are about 33% bigger (https://en.wikipedia.org/wiki/Base64)
var BASE64_OVERHEAD = 1.33; // we could also have used `new Blob([obj]).size`, but it isn't supported in IE9
function byteLength(obj) {
if (typeof obj === "string") {
return utf8Length(obj);
} // arraybuffer or blob
return Math.ceil((obj.byteLength || obj.size) * BASE64_OVERHEAD);
}
function utf8Length(str) {
var c = 0,
length = 0;
for (var i = 0, l = str.length; i < l; i++) {
c = str.charCodeAt(i);
if (c < 0x80) {
length += 1;
} else if (c < 0x800) {
length += 2;
} else if (c < 0xd800 || c >= 0xe000) {
length += 3;
} else {
i++;
length += 4;
}
}
return length;
}
var TransportError = /*#__PURE__*/function (_Error) {
_inherits(TransportError, _Error);
var _super = _createSuper(TransportError);
function TransportError(reason, description, context) {
var _this;
_classCallCheck(this, TransportError);
_this = _super.call(this, reason);
_this.description = description;
_this.context = context;
_this.type = "TransportError";
return _this;
}
return TransportError;
}( /*#__PURE__*/_wrapNativeSuper(Error));
var Transport = /*#__PURE__*/function (_Emitter) {
_inherits(Transport, _Emitter);
var _super2 = _createSuper(Transport);
/**
* Transport abstract constructor.
*
* @param {Object} options.
* @api private
*/
function Transport(opts) {
var _this2;
_classCallCheck(this, Transport);
_this2 = _super2.call(this);
_this2.writable = false;
installTimerFunctions(_assertThisInitialized(_this2), opts);
_this2.opts = opts;
_this2.query = opts.query;
_this2.readyState = "";
_this2.socket = opts.socket;
return _this2;
}
/**
* Emits an error.
*
* @param {String} reason
* @param description
* @param context - the error context
* @return {Transport} for chaining
* @api protected
*/
_createClass(Transport, [{
key: "onError",
value: function onError(reason, description, context) {
_get(_getPrototypeOf(Transport.prototype), "emitReserved", this).call(this, "error", new TransportError(reason, description, context));
return this;
}
/**
* Opens the transport.
*
* @api public
*/
}, {
key: "open",
value: function open() {
if ("closed" === this.readyState || "" === this.readyState) {
this.readyState = "opening";
this.doOpen();
}
return this;
}
/**
* Closes the transport.
*
* @api public
*/
}, {
key: "close",
value: function close() {
if ("opening" === this.readyState || "open" === this.readyState) {
this.doClose();
this.onClose();
}
return this;
}
/**
* Sends multiple packets.
*
* @param {Array} packets
* @api public
*/
}, {
key: "send",
value: function send(packets) {
if ("open" === this.readyState) {
this.write(packets);
}
}
/**
* Called upon open
*
* @api protected
*/
}, {
key: "onOpen",
value: function onOpen() {
this.readyState = "open";
this.writable = true;
_get(_getPrototypeOf(Transport.prototype), "emitReserved", this).call(this, "open");
}
/**
* Called with data.
*
* @param {String} data
* @api protected
*/
}, {
key: "onData",
value: function onData(data) {
var packet = decodePacket(data, this.socket.binaryType);
this.onPacket(packet);
}
/**
* Called with a decoded packet.
*
* @api protected
*/
}, {
key: "onPacket",
value: function onPacket(packet) {
_get(_getPrototypeOf(Transport.prototype), "emitReserved", this).call(this, "packet", packet);
}
/**
* Called upon close.
*
* @api protected
*/
}, {
key: "onClose",
value: function onClose(details) {
this.readyState = "closed";
_get(_getPrototypeOf(Transport.prototype), "emitReserved", this).call(this, "close", details);
}
}]);
return Transport;
}(Emitter);
// imported from https://github.com/unshiftio/yeast
var alphabet = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_'.split(''),
length = 64,
map = {};
var seed = 0,
i = 0,
prev;
/**
* Return a string representing the specified number.
*
* @param {Number} num The number to convert.
* @returns {String} The string representation of the number.
* @api public
*/
function encode$1(num) {
var encoded = '';
do {
encoded = alphabet[num % length] + encoded;
num = Math.floor(num / length);
} while (num > 0);
return encoded;
}
/**
* Yeast: A tiny growing id generator.
*
* @returns {String} A unique id.
* @api public
*/
function yeast() {
var now = encode$1(+new Date());
if (now !== prev) return seed = 0, prev = now;
return now + '.' + encode$1(seed++);
} //
// Map each character to its index.
//
for (; i < length; i++) {
map[alphabet[i]] = i;
}
// imported from https://github.com/galkn/querystring
/**
* Compiles a querystring
* Returns string representation of the object
*
* @param {Object}
* @api private
*/
function encode(obj) {
var str = '';
for (var i in obj) {
if (obj.hasOwnProperty(i)) {
if (str.length) str += '&';
str += encodeURIComponent(i) + '=' + encodeURIComponent(obj[i]);
}
}
return str;
}
/**
* Parses a simple querystring into an object
*
* @param {String} qs
* @api private
*/
function decode(qs) {
var qry = {};
var pairs = qs.split('&');
for (var i = 0, l = pairs.length; i < l; i++) {
var pair = pairs[i].split('=');
qry[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1]);
}
return qry;
}
// imported from https://github.com/component/has-cors
var value = false;
try {
value = typeof XMLHttpRequest !== 'undefined' && 'withCredentials' in new XMLHttpRequest();
} catch (err) {// if XMLHttp support is disabled in IE then it will throw
// when trying to create
}
var hasCORS = value;
// browser shim for xmlhttprequest module
function XMLHttpRequest$1 (opts) {
var xdomain = opts.xdomain; // XMLHttpRequest can be disabled on IE
try {
if ("undefined" !== typeof XMLHttpRequest && (!xdomain || hasCORS)) {
return new XMLHttpRequest();
}
} catch (e) {}
if (!xdomain) {
try {
return new globalThis[["Active"].concat("Object").join("X")]("Microsoft.XMLHTTP");
} catch (e) {}
}
}
function empty() {}
var hasXHR2 = function () {
var xhr = new XMLHttpRequest$1({
xdomain: false
});
return null != xhr.responseType;
}();
var Polling = /*#__PURE__*/function (_Transport) {
_inherits(Polling, _Transport);
var _super = _createSuper(Polling);
/**
* XHR Polling constructor.
*
* @param {Object} opts
* @api public
*/
function Polling(opts) {
var _this;
_classCallCheck(this, Polling);
_this = _super.call(this, opts);
_this.polling = false;
if (typeof location !== "undefined") {
var isSSL = "https:" === location.protocol;
var port = location.port; // some user agents have empty `location.port`
if (!port) {
port = isSSL ? "443" : "80";
}
_this.xd = typeof location !== "undefined" && opts.hostname !== location.hostname || port !== opts.port;
_this.xs = opts.secure !== isSSL;
}
/**
* XHR supports binary
*/
var forceBase64 = opts && opts.forceBase64;
_this.supportsBinary = hasXHR2 && !forceBase64;
return _this;
}
/**
* Transport name.
*/
_createClass(Polling, [{
key: "name",
get: function get() {
return "polling";
}
/**
* Opens the socket (triggers polling). We write a PING message to determine
* when the transport is open.
*
* @api private
*/
}, {
key: "doOpen",
value: function doOpen() {
this.poll();
}
/**
* Pauses polling.
*
* @param {Function} callback upon buffers are flushed and transport is paused
* @api private
*/
}, {
key: "pause",
value: function pause(onPause) {
var _this2 = this;
this.readyState = "pausing";
var pause = function pause() {
_this2.readyState = "paused";
onPause();
};
if (this.polling || !this.writable) {
var total = 0;
if (this.polling) {
total++;
this.once("pollComplete", function () {
--total || pause();
});
}
if (!this.writable) {
total++;
this.once("drain", function () {
--total || pause();
});
}
} else {
pause();
}
}
/**
* Starts polling cycle.
*
* @api public
*/
}, {
key: "poll",
value: function poll() {
this.polling = true;
this.doPoll();
this.emitReserved("poll");
}
/**
* Overloads onData to detect payloads.
*
* @api private
*/
}, {
key: "onData",
value: function onData(data) {
var _this3 = this;
var callback = function callback(packet) {
// if its the first message we consider the transport open
if ("opening" === _this3.readyState && packet.type === "open") {
_this3.onOpen();
} // if its a close packet, we close the ongoing requests
if ("close" === packet.type) {
_this3.onClose({
description: "transport closed by the server"
});
return false;
} // otherwise bypass onData and handle the message
_this3.onPacket(packet);
}; // decode payload
decodePayload(data, this.socket.binaryType).forEach(callback); // if an event did not trigger closing
if ("closed" !== this.readyState) {
// if we got data we're not polling
this.polling = false;
this.emitReserved("pollComplete");
if ("open" === this.readyState) {
this.poll();
}
}
}
/**
* For polling, send a close packet.
*
* @api private
*/
}, {
key: "doClose",
value: function doClose() {
var _this4 = this;
var close = function close() {
_this4.write([{
type: "close"
}]);
};
if ("open" === this.readyState) {
close();
} else {
// in case we're trying to close while
// handshaking is in progress (GH-164)
this.once("open", close);
}
}
/**
* Writes a packets payload.
*
* @param {Array} data packets
* @param {Function} drain callback
* @api private
*/
}, {
key: "write",
value: function write(packets) {
var _this5 = this;
this.writable = false;
encodePayload(packets, function (data) {
_this5.doWrite(data, function () {
_this5.writable = true;
_this5.emitReserved("drain");
});
});
}
/**
* Generates uri for connection.
*
* @api private
*/
}, {
key: "uri",
value: function uri() {
var query = this.query || {};
var schema = this.opts.secure ? "https" : "http";
var port = ""; // cache busting is forced
if (false !== this.opts.timestampRequests) {
query[this.opts.timestampParam] = yeast();
}
if (!this.supportsBinary && !query.sid) {
query.b64 = 1;
} // avoid port if default for schema
if (this.opts.port && ("https" === schema && Number(this.opts.port) !== 443 || "http" === schema && Number(this.opts.port) !== 80)) {
port = ":" + this.opts.port;
}
var encodedQuery = encode(query);
var ipv6 = this.opts.hostname.indexOf(":") !== -1;
return schema + "://" + (ipv6 ? "[" + this.opts.hostname + "]" : this.opts.hostname) + port + this.opts.path + (encodedQuery.length ? "?" + encodedQuery : "");
}
/**
* Creates a request.
*
* @param {String} method
* @api private
*/
}, {
key: "request",
value: function request() {
var opts = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
_extends(opts, {
xd: this.xd,
xs: this.xs
}, this.opts);
return new Request(this.uri(), opts);
}
/**
* Sends data.
*
* @param {String} data to send.
* @param {Function} called upon flush.
* @api private
*/
}, {
key: "doWrite",
value: function doWrite(data, fn) {
var _this6 = this;
var req = this.request({
method: "POST",
data: data
});
req.on("success", fn);
req.on("error", function (xhrStatus, context) {
_this6.onError("xhr post error", xhrStatus, context);
});
}
/**
* Starts a poll cycle.
*
* @api private
*/
}, {
key: "doPoll",
value: function doPoll() {
var _this7 = this;
var req = this.request();
req.on("data", this.onData.bind(this));
req.on("error", function (xhrStatus, context) {
_this7.onError("xhr poll error", xhrStatus, context);
});
this.pollXhr = req;
}
}]);
return Polling;
}(Transport);
var Request = /*#__PURE__*/function (_Emitter) {
_inherits(Request, _Emitter);
var _super2 = _createSuper(Request);
/**
* Request constructor
*
* @param {Object} options
* @api public
*/
function Request(uri, opts) {
var _this8;
_classCallCheck(this, Request);
_this8 = _super2.call(this);
installTimerFunctions(_assertThisInitialized(_this8), opts);
_this8.opts = opts;
_this8.method = opts.method || "GET";
_this8.uri = uri;
_this8.async = false !== opts.async;
_this8.data = undefined !== opts.data ? opts.data : null;
_this8.create();
return _this8;
}
/**
* Creates the XHR object and sends the request.
*
* @api private
*/
_createClass(Request, [{
key: "create",
value: function create() {
var _this9 = this;
var opts = pick(this.opts, "agent", "pfx", "key", "passphrase", "cert", "ca", "ciphers", "rejectUnauthorized", "autoUnref");
opts.xdomain = !!this.opts.xd;
opts.xscheme = !!this.opts.xs;
var xhr = this.xhr = new XMLHttpRequest$1(opts);
try {
xhr.open(this.method, this.uri, this.async);
try {
if (this.opts.extraHeaders) {
xhr.setDisableHeaderCheck && xhr.setDisableHeaderCheck(true);
for (var i in this.opts.extraHeaders) {
if (this.opts.extraHeaders.hasOwnProperty(i)) {
xhr.setRequestHeader(i, this.opts.extraHeaders[i]);
}
}
}
} catch (e) {}
if ("POST" === this.method) {
try {
xhr.setRequestHeader("Content-type", "text/plain;charset=UTF-8");
} catch (e) {}
}
try {
xhr.setRequestHeader("Accept", "*/*");
} catch (e) {} // ie6 check
if ("withCredentials" in xhr) {
xhr.withCredentials = this.opts.withCredentials;
}
if (this.opts.requestTimeout) {
xhr.timeout = this.opts.requestTimeout;
}
xhr.onreadystatechange = function () {
if (4 !== xhr.readyState) return;
if (200 === xhr.status || 1223 === xhr.status) {
_this9.onLoad();
} else {
// make sure the `error` event handler that's user-set
// does not throw in the same tick and gets caught here
_this9.setTimeoutFn(function () {
_this9.onError(typeof xhr.status === "number" ? xhr.status : 0);
}, 0);
}
};
xhr.send(this.data);
} catch (e) {
// Need to defer since .create() is called directly from the constructor
// and thus the 'error' event can only be only bound *after* this exception
// occurs. Therefore, also, we cannot throw here at all.
this.setTimeoutFn(function () {
_this9.onError(e);
}, 0);
return;
}
if (typeof document !== "undefined") {
this.index = Request.requestsCount++;
Request.requests[this.index] = this;
}
}
/**
* Called upon error.
*
* @api private
*/
}, {
key: "onError",
value: function onError(err) {
this.emitReserved("error", err, this.xhr);
this.cleanup(true);
}
/**
* Cleans up house.
*
* @api private
*/
}, {
key: "cleanup",
value: function cleanup(fromError) {
if ("undefined" === typeof this.xhr || null === this.xhr) {
return;
}
this.xhr.onreadystatechange = empty;
if (fromError) {
try {
this.xhr.abort();
} catch (e) {}
}
if (typeof document !== "undefined") {
delete Request.requests[this.index];
}
this.xhr = null;
}
/**
* Called upon load.
*
* @api private
*/
}, {
key: "onLoad",
value: function onLoad() {
var data = this.xhr.responseText;
if (data !== null) {
this.emitReserved("data", data);
this.emitReserved("success");
this.cleanup();
}
}
/**
* Aborts the request.
*
* @api public
*/
}, {
key: "abort",
value: function abort() {
this.cleanup();
}
}]);
return Request;
}(Emitter);
Request.requestsCount = 0;
Request.requests = {};
/**
* Aborts pending requests when unloading the window. This is needed to prevent
* memory leaks (e.g. when using IE) and to ensure that no spurious error is
* emitted.
*/
if (typeof document !== "undefined") {
// @ts-ignore
if (typeof attachEvent === "function") {
// @ts-ignore
attachEvent("onunload", unloadHandler);
} else if (typeof addEventListener === "function") {
var terminationEvent = "onpagehide" in globalThis ? "pagehide" : "unload";
addEventListener(terminationEvent, unloadHandler, false);
}
}
function unloadHandler() {
for (var i in Request.requests) {
if (Request.requests.hasOwnProperty(i)) {
Request.requests[i].abort();
}
}
}
var nextTick = function () {
var isPromiseAvailable = typeof Promise === "function" && typeof Promise.resolve === "function";
if (isPromiseAvailable) {
return function (cb) {
return Promise.resolve().then(cb);
};
} else {
return function (cb, setTimeoutFn) {
return setTimeoutFn(cb, 0);
};
}
}();
var WebSocket = globalThis.WebSocket || globalThis.MozWebSocket;
var usingBrowserWebSocket = true;
var defaultBinaryType = "arraybuffer";
var isReactNative = typeof navigator !== "undefined" && typeof navigator.product === "string" && navigator.product.toLowerCase() === "reactnative";
var WS = /*#__PURE__*/function (_Transport) {
_inherits(WS, _Transport);
var _super = _createSuper(WS);
/**
* WebSocket transport constructor.
*
* @api {Object} connection options
* @api public
*/
function WS(opts) {
var _this;
_classCallCheck(this, WS);
_this = _super.call(this, opts);
_this.supportsBinary = !opts.forceBase64;
return _this;
}
/**
* Transport name.
*
* @api public
*/
_createClass(WS, [{
key: "name",
get: function get() {
return "websocket";
}
/**
* Opens socket.
*
* @api private
*/
}, {
key: "doOpen",
value: function doOpen() {
if (!this.check()) {
// let probe timeout
return;
}
var uri = this.uri();
var protocols = this.opts.protocols; // React Native only supports the 'headers' option, and will print a warning if anything else is passed
var opts = isReactNative ? {} : pick(this.opts, "agent", "perMessageDeflate", "pfx", "key", "passphrase", "cert", "ca", "ciphers", "rejectUnauthorized", "localAddress", "protocolVersion", "origin", "maxPayload", "family", "checkServerIdentity");
if (this.opts.extraHeaders) {
opts.headers = this.opts.extraHeaders;
}
try {
this.ws = usingBrowserWebSocket && !isReactNative ? protocols ? new WebSocket(uri, protocols) : new WebSocket(uri) : new WebSocket(uri, protocols, opts);
} catch (err) {
return this.emitReserved("error", err);
}
this.ws.binaryType = this.socket.binaryType || defaultBinaryType;
this.addEventListeners();
}
/**
* Adds event listeners to the socket
*
* @api private
*/
}, {
key: "addEventListeners",
value: function addEventListeners() {
var _this2 = this;
this.ws.onopen = function () {
if (_this2.opts.autoUnref) {
_this2.ws._socket.unref();
}
_this2.onOpen();
};
this.ws.onclose = function (closeEvent) {
return _this2.onClose({
description: "websocket connection closed",
context: closeEvent
});
};
this.ws.onmessage = function (ev) {
return _this2.onData(ev.data);
};
this.ws.onerror = function (e) {
return _this2.onError("websocket error", e);
};
}
/**
* Writes data to socket.
*
* @param {Array} array of packets.
* @api private
*/
}, {
key: "write",
value: function write(packets) {
var _this3 = this;
this.writable = false; // encodePacket efficient as it uses WS framing
// no need for encodePayload
var _loop = function _loop(i) {
var packet = packets[i];
var lastPacket = i === packets.length - 1;
encodePacket(packet, _this3.supportsBinary, function (data) {
// always create a new object (GH-437)
var opts = {};
// have a chance of informing us about it yet, in that case send will
// throw an error
try {
if (usingBrowserWebSocket) {
// TypeError is thrown when passing the second argument on Safari
_this3.ws.send(data);
}
} catch (e) {}
if (lastPacket) {
// fake drain
// defer to next tick to allow Socket to clear writeBuffer
nextTick(function () {
_this3.writable = true;
_this3.emitReserved("drain");
}, _this3.setTimeoutFn);
}
});
};
for (var i = 0; i < packets.length; i++) {
_loop(i);
}
}
/**
* Closes socket.
*
* @api private
*/
}, {
key: "doClose",
value: function doClose() {
if (typeof this.ws !== "undefined") {
this.ws.close();
this.ws = null;
}
}
/**
* Generates uri for connection.
*
* @api private
*/
}, {
key: "uri",
value: function uri() {
var query = this.query || {};
var schema = this.opts.secure ? "wss" : "ws";
var port = ""; // avoid port if default for schema
if (this.opts.port && ("wss" === schema && Number(this.opts.port) !== 443 || "ws" === schema && Number(this.opts.port) !== 80)) {
port = ":" + this.opts.port;
} // append timestamp to URI
if (this.opts.timestampRequests) {
query[this.opts.timestampParam] = yeast();
} // communicate binary support capabilities
if (!this.supportsBinary) {
query.b64 = 1;
}
var encodedQuery = encode(query);
var ipv6 = this.opts.hostname.indexOf(":") !== -1;
return schema + "://" + (ipv6 ? "[" + this.opts.hostname + "]" : this.opts.hostname) + port + this.opts.path + (encodedQuery.length ? "?" + encodedQuery : "");
}
/**
* Feature detection for WebSocket.
*
* @return {Boolean} whether this transport is available.
* @api public
*/
}, {
key: "check",
value: function check() {
return !!WebSocket && !("__initialize" in WebSocket && this.name === WS.prototype.name);
}
}]);
return WS;
}(Transport);
var transports = {
websocket: WS,
polling: Polling
};
// imported from https://github.com/galkn/parseuri
/**
* Parses an URI
*
* @author Steven Levithan <stevenlevithan.com> (MIT license)
* @api private
*/
var re = /^(?:(?![^:@]+:[^:@\/]*@)(http|https|ws|wss):\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;
var parts = ['source', 'protocol', 'authority', 'userInfo', 'user', 'password', 'host', 'port', 'relative', 'path', 'directory', 'file', 'query', 'anchor'];
function parse(str) {
var src = str,
b = str.indexOf('['),
e = str.indexOf(']');
if (b != -1 && e != -1) {
str = str.substring(0, b) + str.substring(b, e).replace(/:/g, ';') + str.substring(e, str.length);
}
var m = re.exec(str || ''),
uri = {},
i = 14;
while (i--) {
uri[parts[i]] = m[i] || '';
}
if (b != -1 && e != -1) {
uri.source = src;
uri.host = uri.host.substring(1, uri.host.length - 1).replace(/;/g, ':');
uri.authority = uri.authority.replace('[', '').replace(']', '').replace(/;/g, ':');
uri.ipv6uri = true;
}
uri.pathNames = pathNames(uri, uri['path']);
uri.queryKey = queryKey(uri, uri['query']);
return uri;
}
function pathNames(obj, path) {
var regx = /\/{2,9}/g,
names = path.replace(regx, "/").split("/");
if (path.substr(0, 1) == '/' || path.length === 0) {
names.splice(0, 1);
}
if (path.substr(path.length - 1, 1) == '/') {
names.splice(names.length - 1, 1);
}
return names;
}
function queryKey(uri, query) {
var data = {};
query.replace(/(?:^|&)([^&=]*)=?([^&]*)/g, function ($0, $1, $2) {
if ($1) {
data[$1] = $2;
}
});
return data;
}
var Socket$1 = /*#__PURE__*/function (_Emitter) {
_inherits(Socket, _Emitter);
var _super = _createSuper(Socket);
/**
* Socket constructor.
*
* @param {String|Object} uri or options
* @param {Object} opts - options
* @api public
*/
function Socket(uri) {
var _this;
var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
_classCallCheck(this, Socket);
_this = _super.call(this);
if (uri && "object" === _typeof(uri)) {
opts = uri;
uri = null;
}
if (uri) {
uri = parse(uri);
opts.hostname = uri.host;
opts.secure = uri.protocol === "https" || uri.protocol === "wss";
opts.port = uri.port;
if (uri.query) opts.query = uri.query;
} else if (opts.host) {
opts.hostname = parse(opts.host).host;
}
installTimerFunctions(_assertThisInitialized(_this), opts);
_this.secure = null != opts.secure ? opts.secure : typeof location !== "undefined" && "https:" === location.protocol;
if (opts.hostname && !opts.port) {
// if no port is specified manually, use the protocol default
opts.port = _this.secure ? "443" : "80";
}
_this.hostname = opts.hostname || (typeof location !== "undefined" ? location.hostname : "localhost");
_this.port = opts.port || (typeof location !== "undefined" && location.port ? location.port : _this.secure ? "443" : "80");
_this.transports = opts.transports || ["polling", "websocket"];
_this.readyState = "";
_this.writeBuffer = [];
_this.prevBufferLen = 0;
_this.opts = _extends({
path: "/engine.io",
agent: false,
withCredentials: false,
upgrade: true,
timestampParam: "t",
rememberUpgrade: false,
rejectUnauthorized: true,
perMessageDeflate: {
threshold: 1024
},
transportOptions: {},
closeOnBeforeunload: true
}, opts);
_this.opts.path = _this.opts.path.replace(/\/$/, "") + "/";
if (typeof _this.opts.query === "string") {
_this.opts.query = decode(_this.opts.query);
} // set on handshake
_this.id = null;
_this.upgrades = null;
_this.pingInterval = null;
_this.pingTimeout = null; // set on heartbeat
_this.pingTimeoutTimer = null;
if (typeof addEventListener === "function") {
if (_this.opts.closeOnBeforeunload) {
// Firefox closes the connection when the "beforeunload" event is emitted but not Chrome. This event listener
// ensures every browser behaves the same (no "disconnect" event at the Socket.IO level when the page is
// closed/reloaded)
addEventListener("beforeunload", function () {
if (_this.transport) {
// silently close the transport
_this.transport.removeAllListeners();
_this.transport.close();
}
}, false);
}
if (_this.hostname !== "localhost") {
_this.offlineEventListener = function () {
_this.onClose("transport close", {
description: "network connection lost"
});
};
addEventListener("offline", _this.offlineEventListener, false);
}
}
_this.open();
return _this;
}
/**
* Creates transport of the given type.
*
* @param {String} transport name
* @return {Transport}
* @api private
*/
_createClass(Socket, [{
key: "createTransport",
value: function createTransport(name) {
var query = _extends({}, this.opts.query); // append engine.io protocol identifier
query.EIO = protocol$1; // transport name
query.transport = name; // session id if we already have one
if (this.id) query.sid = this.id;
var opts = _extends({}, this.opts.transportOptions[name], this.opts, {
query: query,
socket: this,
hostname: this.hostname,
secure: this.secure,
port: this.port
});
return new transports[name](opts);
}
/**
* Initializes transport to use and starts probe.
*
* @api private
*/
}, {
key: "open",
value: function open() {
var _this2 = this;
var transport;
if (this.opts.rememberUpgrade && Socket.priorWebsocketSuccess && this.transports.indexOf("websocket") !== -1) {
transport = "websocket";
} else if (0 === this.transports.length) {
// Emit error on next tick so it can be listened to
this.setTimeoutFn(function () {
_this2.emitReserved("error", "No transports available");
}, 0);
return;
} else {
transport = this.transports[0];
}
this.readyState = "opening"; // Retry with the next transport if the transport is disabled (jsonp: false)
try {
transport = this.createTransport(transport);
} catch (e) {
this.transports.shift();
this.open();
return;
}
transport.open();
this.setTransport(transport);
}
/**
* Sets the current transport. Disables the existing one (if any).
*
* @api private
*/
}, {
key: "setTransport",
value: function setTransport(transport) {
var _this3 = this;
if (this.transport) {
this.transport.removeAllListeners();
} // set up transport
this.transport = transport; // set up transport listeners
transport.on("drain", this.onDrain.bind(this)).on("packet", this.onPacket.bind(this)).on("error", this.onError.bind(this)).on("close", function (reason) {
return _this3.onClose("transport close", reason);
});
}
/**
* Probes a transport.
*
* @param {String} transport name
* @api private
*/
}, {
key: "probe",
value: function probe(name) {
var _this4 = this;
var transport = this.createTransport(name);
var failed = false;
Socket.priorWebsocketSuccess = false;
var onTransportOpen = function onTransportOpen() {
if (failed) return;
transport.send([{
type: "ping",
data: "probe"
}]);
transport.once("packet", function (msg) {
if (failed) return;
if ("pong" === msg.type && "probe" === msg.data) {
_this4.upgrading = true;
_this4.emitReserved("upgrading", transport);
if (!transport) return;
Socket.priorWebsocketSuccess = "websocket" === transport.name;
_this4.transport.pause(function () {
if (failed) return;
if ("closed" === _this4.readyState) return;
cleanup();
_this4.setTransport(transport);
transport.send([{
type: "upgrade"
}]);
_this4.emitReserved("upgrade", transport);
transport = null;
_this4.upgrading = false;
_this4.flush();
});
} else {
var err = new Error("probe error"); // @ts-ignore
err.transport = transport.name;
_this4.emitReserved("upgradeError", err);
}
});
};
function freezeTransport() {
if (failed) return; // Any callback called by transport should be ignored since now
failed = true;
cleanup();
transport.close();
transport = null;
} // Handle any error that happens while probing
var onerror = function onerror(err) {
var error = new Error("probe error: " + err); // @ts-ignore
error.transport = transport.name;
freezeTransport();
_this4.emitReserved("upgradeError", error);
};
function onTransportClose() {
onerror("transport closed");
} // When the socket is closed while we're probing
function onclose() {
onerror("socket closed");
} // When the socket is upgraded while we're probing
function onupgrade(to) {
if (transport && to.name !== transport.name) {
freezeTransport();
}
} // Remove all listeners on the transport and on self
var cleanup = function cleanup() {
transport.removeListener("open", onTransportOpen);
transport.removeListener("error", onerror);
transport.removeListener("close", onTransportClose);
_this4.off("close", onclose);
_this4.off("upgrading", onupgrade);
};
transport.once("open", onTransportOpen);
transport.once("error", onerror);
transport.once("close", onTransportClose);
this.once("close", onclose);
this.once("upgrading", onupgrade);
transport.open();
}
/**
* Called when connection is deemed open.
*
* @api private
*/
}, {
key: "onOpen",
value: function onOpen() {
this.readyState = "open";
Socket.priorWebsocketSuccess = "websocket" === this.transport.name;
this.emitReserved("open");
this.flush(); // we check for `readyState` in case an `open`
// listener already closed the socket
if ("open" === this.readyState && this.opts.upgrade && this.transport.pause) {
var i = 0;
var l = this.upgrades.length;
for (; i < l; i++) {
this.probe(this.upgrades[i]);
}
}
}
/**
* Handles a packet.
*
* @api private
*/
}, {
key: "onPacket",
value: function onPacket(packet) {
if ("opening" === this.readyState || "open" === this.readyState || "closing" === this.readyState) {
this.emitReserved("packet", packet); // Socket is live - any packet counts
this.emitReserved("heartbeat");
switch (packet.type) {
case "open":
this.onHandshake(JSON.parse(packet.data));
break;
case "ping":
this.resetPingTimeout();
this.sendPacket("pong");
this.emitReserved("ping");
this.emitReserved("pong");
break;
case "error":
var err = new Error("server error"); // @ts-ignore
err.code = packet.data;
this.onError(err);
break;
case "message":
this.emitReserved("data", packet.data);
this.emitReserved("message", packet.data);
break;
}
}
}
/**
* Called upon handshake completion.
*
* @param {Object} data - handshake obj
* @api private
*/
}, {
key: "onHandshake",
value: function onHandshake(data) {
this.emitReserved("handshake", data);
this.id = data.sid;
this.transport.query.sid = data.sid;
this.upgrades = this.filterUpgrades(data.upgrades);
this.pingInterval = data.pingInterval;
this.pingTimeout = data.pingTimeout;
this.maxPayload = data.maxPayload;
this.onOpen(); // In case open handler closes socket
if ("closed" === this.readyState) return;
this.resetPingTimeout();
}
/**
* Sets and resets ping timeout timer based on server pings.
*
* @api private
*/
}, {
key: "resetPingTimeout",
value: function resetPingTimeout() {
var _this5 = this;
this.clearTimeoutFn(this.pingTimeoutTimer);
this.pingTimeoutTimer = this.setTimeoutFn(function () {
_this5.onClose("ping timeout");
}, this.pingInterval + this.pingTimeout);
if (this.opts.autoUnref) {
this.pingTimeoutTimer.unref();
}
}
/**
* Called on `drain` event
*
* @api private
*/
}, {
key: "onDrain",
value: function onDrain() {
this.writeBuffer.splice(0, this.prevBufferLen); // setting prevBufferLen = 0 is very important
// for example, when upgrading, upgrade packet is sent over,
// and a nonzero prevBufferLen could cause problems on `drain`
this.prevBufferLen = 0;
if (0 === this.writeBuffer.length) {
this.emitReserved("drain");
} else {
this.flush();
}
}
/**
* Flush write buffers.
*
* @api private
*/
}, {
key: "flush",
value: function flush() {
if ("closed" !== this.readyState && this.transport.writable && !this.upgrading && this.writeBuffer.length) {
var packets = this.getWritablePackets();
this.transport.send(packets); // keep track of current length of writeBuffer
// splice writeBuffer and callbackBuffer on `drain`
this.prevBufferLen = packets.length;
this.emitReserved("flush");
}
}
/**
* Ensure the encoded size of the writeBuffer is below the maxPayload value sent by the server (only for HTTP
* long-polling)
*
* @private
*/
}, {
key: "getWritablePackets",
value: function getWritablePackets() {
var shouldCheckPayloadSize = this.maxPayload && this.transport.name === "polling" && this.writeBuffer.length > 1;
if (!shouldCheckPayloadSize) {
return this.writeBuffer;
}
var payloadSize = 1; // first packet type
for (var i = 0; i < this.writeBuffer.length; i++) {
var data = this.writeBuffer[i].data;
if (data) {
payloadSize += byteLength(data);
}
if (i > 0 && payloadSize > this.maxPayload) {
return this.writeBuffer.slice(0, i);
}
payloadSize += 2; // separator + packet type
}
return this.writeBuffer;
}
/**
* Sends a message.
*
* @param {String} message.
* @param {Function} callback function.
* @param {Object} options.
* @return {Socket} for chaining.
* @api public
*/
}, {
key: "write",
value: function write(msg, options, fn) {
this.sendPacket("message", msg, options, fn);
return this;
}
}, {
key: "send",
value: function send(msg, options, fn) {
this.sendPacket("message", msg, options, fn);
return this;
}
/**
* Sends a packet.
*
* @param {String} packet type.
* @param {String} data.
* @param {Object} options.
* @param {Function} callback function.
* @api private
*/
}, {
key: "sendPacket",
value: function sendPacket(type, data, options, fn) {
if ("function" === typeof data) {
fn = data;
data = undefined;
}
if ("function" === typeof options) {
fn = options;
options = null;
}
if ("closing" === this.readyState || "closed" === this.readyState) {
return;
}
options = options || {};
options.compress = false !== options.compress;
var packet = {
type: type,
data: data,
options: options
};
this.emitReserved("packetCreate", packet);
this.writeBuffer.push(packet);
if (fn) this.once("flush", fn);
this.flush();
}
/**
* Closes the connection.
*
* @api public
*/
}, {
key: "close",
value: function close() {
var _this6 = this;
var close = function close() {
_this6.onClose("forced close");
_this6.transport.close();
};
var cleanupAndClose = function cleanupAndClose() {
_this6.off("upgrade", cleanupAndClose);
_this6.off("upgradeError", cleanupAndClose);
close();
};
var waitForUpgrade = function waitForUpgrade() {
// wait for upgrade to finish since we can't send packets while pausing a transport
_this6.once("upgrade", cleanupAndClose);
_this6.once("upgradeError", cleanupAndClose);
};
if ("opening" === this.readyState || "open" === this.readyState) {
this.readyState = "closing";
if (this.writeBuffer.length) {
this.once("drain", function () {
if (_this6.upgrading) {
waitForUpgrade();
} else {
close();
}
});
} else if (this.upgrading) {
waitForUpgrade();
} else {
close();
}
}
return this;
}
/**
* Called upon transport error
*
* @api private
*/
}, {
key: "onError",
value: function onError(err) {
Socket.priorWebsocketSuccess = false;
this.emitReserved("error", err);
this.onClose("transport error", err);
}
/**
* Called upon transport close.
*
* @api private
*/
}, {
key: "onClose",
value: function onClose(reason, description) {
if ("opening" === this.readyState || "open" === this.readyState || "closing" === this.readyState) {
// clear timers
this.clearTimeoutFn(this.pingTimeoutTimer); // stop event from firing again for transport
this.transport.removeAllListeners("close"); // ensure transport won't stay open
this.transport.close(); // ignore further transport communication
this.transport.removeAllListeners();
if (typeof removeEventListener === "function") {
removeEventListener("offline", this.offlineEventListener, false);
} // set ready state
this.readyState = "closed"; // clear session id
this.id = null; // emit close event
this.emitReserved("close", reason, description); // clean buffers after, so users can still
// grab the buffers on `close` event
this.writeBuffer = [];
this.prevBufferLen = 0;
}
}
/**
* Filters upgrades, returning only those matching client transports.
*
* @param {Array} server upgrades
* @api private
*
*/
}, {
key: "filterUpgrades",
value: function filterUpgrades(upgrades) {
var filteredUpgrades = [];
var i = 0;
var j = upgrades.length;
for (; i < j; i++) {
if (~this.transports.indexOf(upgrades[i])) filteredUpgrades.push(upgrades[i]);
}
return filteredUpgrades;
}
}]);
return Socket;
}(Emitter);
Socket$1.protocol = protocol$1;
/**
* URL parser.
*
* @param uri - url
* @param path - the request path of the connection
* @param loc - An object meant to mimic window.location.
* Defaults to window.location.
* @public
*/
function url(uri) {
var path = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : "";
var loc = arguments.length > 2 ? arguments[2] : undefined;
var obj = uri; // default to window.location
loc = loc || typeof location !== "undefined" && location;
if (null == uri) uri = loc.protocol + "//" + loc.host; // relative path support
if (typeof uri === "string") {
if ("/" === uri.charAt(0)) {
if ("/" === uri.charAt(1)) {
uri = loc.protocol + uri;
} else {
uri = loc.host + uri;
}
}
if (!/^(https?|wss?):\/\//.test(uri)) {
if ("undefined" !== typeof loc) {
uri = loc.protocol + "//" + uri;
} else {
uri = "https://" + uri;
}
} // parse
obj = parse(uri);
} // make sure we treat `localhost:80` and `localhost` equally
if (!obj.port) {
if (/^(http|ws)$/.test(obj.protocol)) {
obj.port = "80";
} else if (/^(http|ws)s$/.test(obj.protocol)) {
obj.port = "443";
}
}
obj.path = obj.path || "/";
var ipv6 = obj.host.indexOf(":") !== -1;
var host = ipv6 ? "[" + obj.host + "]" : obj.host; // define unique id
obj.id = obj.protocol + "://" + host + ":" + obj.port + path; // define href
obj.href = obj.protocol + "://" + host + (loc && loc.port === obj.port ? "" : ":" + obj.port);
return obj;
}
var withNativeArrayBuffer = typeof ArrayBuffer === "function";
var isView = function isView(obj) {
return typeof ArrayBuffer.isView === "function" ? ArrayBuffer.isView(obj) : obj.buffer instanceof ArrayBuffer;
};
var toString = Object.prototype.toString;
var withNativeBlob = typeof Blob === "function" || typeof Blob !== "undefined" && toString.call(Blob) === "[object BlobConstructor]";
var withNativeFile = typeof File === "function" || typeof File !== "undefined" && toString.call(File) === "[object FileConstructor]";
/**
* Returns true if obj is a Buffer, an ArrayBuffer, a Blob or a File.
*
* @private
*/
function isBinary(obj) {
return withNativeArrayBuffer && (obj instanceof ArrayBuffer || isView(obj)) || withNativeBlob && obj instanceof Blob || withNativeFile && obj instanceof File;
}
function hasBinary(obj, toJSON) {
if (!obj || _typeof(obj) !== "object") {
return false;
}
if (Array.isArray(obj)) {
for (var i = 0, l = obj.length; i < l; i++) {
if (hasBinary(obj[i])) {
return true;
}
}
return false;
}
if (isBinary(obj)) {
return true;
}
if (obj.toJSON && typeof obj.toJSON === "function" && arguments.length === 1) {
return hasBinary(obj.toJSON(), true);
}
for (var key in obj) {
if (Object.prototype.hasOwnProperty.call(obj, key) && hasBinary(obj[key])) {
return true;
}
}
return false;
}
/**
* Replaces every Buffer | ArrayBuffer | Blob | File in packet with a numbered placeholder.
*
* @param {Object} packet - socket.io event packet
* @return {Object} with deconstructed packet and list of buffers
* @public
*/
function deconstructPacket(packet) {
var buffers = [];
var packetData = packet.data;
var pack = packet;
pack.data = _deconstructPacket(packetData, buffers);
pack.attachments = buffers.length; // number of binary 'attachments'
return {
packet: pack,
buffers: buffers
};
}
function _deconstructPacket(data, buffers) {
if (!data) return data;
if (isBinary(data)) {
var placeholder = {
_placeholder: true,
num: buffers.length
};
buffers.push(data);
return placeholder;
} else if (Array.isArray(data)) {
var newData = new Array(data.length);
for (var i = 0; i < data.length; i++) {
newData[i] = _deconstructPacket(data[i], buffers);
}
return newData;
} else if (_typeof(data) === "object" && !(data instanceof Date)) {
var _newData = {};
for (var key in data) {
if (Object.prototype.hasOwnProperty.call(data, key)) {
_newData[key] = _deconstructPacket(data[key], buffers);
}
}
return _newData;
}
return data;
}
/**
* Reconstructs a binary packet from its placeholder packet and buffers
*
* @param {Object} packet - event packet with placeholders
* @param {Array} buffers - binary buffers to put in placeholder positions
* @return {Object} reconstructed packet
* @public
*/
function reconstructPacket(packet, buffers) {
packet.data = _reconstructPacket(packet.data, buffers);
packet.attachments = undefined; // no longer useful
return packet;
}
function _reconstructPacket(data, buffers) {
if (!data) return data;
if (data && data._placeholder) {
return buffers[data.num]; // appropriate buffer (should be natural order anyway)
} else if (Array.isArray(data)) {
for (var i = 0; i < data.length; i++) {
data[i] = _reconstructPacket(data[i], buffers);
}
} else if (_typeof(data) === "object") {
for (var key in data) {
if (Object.prototype.hasOwnProperty.call(data, key)) {
data[key] = _reconstructPacket(data[key], buffers);
}
}
}
return data;
}
/**
* Protocol version.
*
* @public
*/
var protocol = 5;
var PacketType;
(function (PacketType) {
PacketType[PacketType["CONNECT"] = 0] = "CONNECT";
PacketType[PacketType["DISCONNECT"] = 1] = "DISCONNECT";
PacketType[PacketType["EVENT"] = 2] = "EVENT";
PacketType[PacketType["ACK"] = 3] = "ACK";
PacketType[PacketType["CONNECT_ERROR"] = 4] = "CONNECT_ERROR";
PacketType[PacketType["BINARY_EVENT"] = 5] = "BINARY_EVENT";
PacketType[PacketType["BINARY_ACK"] = 6] = "BINARY_ACK";
})(PacketType || (PacketType = {}));
/**
* A socket.io Encoder instance
*/
var Encoder = /*#__PURE__*/function () {
/**
* Encoder constructor
*
* @param {function} replacer - custom replacer to pass down to JSON.parse
*/
function Encoder(replacer) {
_classCallCheck(this, Encoder);
this.replacer = replacer;
}
/**
* Encode a packet as a single string if non-binary, or as a
* buffer sequence, depending on packet type.
*
* @param {Object} obj - packet object
*/
_createClass(Encoder, [{
key: "encode",
value: function encode(obj) {
if (obj.type === PacketType.EVENT || obj.type === PacketType.ACK) {
if (hasBinary(obj)) {
obj.type = obj.type === PacketType.EVENT ? PacketType.BINARY_EVENT : PacketType.BINARY_ACK;
return this.encodeAsBinary(obj);
}
}
return [this.encodeAsString(obj)];
}
/**
* Encode packet as string.
*/
}, {
key: "encodeAsString",
value: function encodeAsString(obj) {
// first is type
var str = "" + obj.type; // attachments if we have them
if (obj.type === PacketType.BINARY_EVENT || obj.type === PacketType.BINARY_ACK) {
str += obj.attachments + "-";
} // if we have a namespace other than `/`
// we append it followed by a comma `,`
if (obj.nsp && "/" !== obj.nsp) {
str += obj.nsp + ",";
} // immediately followed by the id
if (null != obj.id) {
str += obj.id;
} // json data
if (null != obj.data) {
str += JSON.stringify(obj.data, this.replacer);
}
return str;
}
/**
* Encode packet as 'buffer sequence' by removing blobs, and
* deconstructing packet into object with placeholders and
* a list of buffers.
*/
}, {
key: "encodeAsBinary",
value: function encodeAsBinary(obj) {
var deconstruction = deconstructPacket(obj);
var pack = this.encodeAsString(deconstruction.packet);
var buffers = deconstruction.buffers;
buffers.unshift(pack); // add packet info to beginning of data list
return buffers; // write all the buffers
}
}]);
return Encoder;
}();
/**
* A socket.io Decoder instance
*
* @return {Object} decoder
*/
var Decoder = /*#__PURE__*/function (_Emitter) {
_inherits(Decoder, _Emitter);
var _super = _createSuper(Decoder);
/**
* Decoder constructor
*
* @param {function} reviver - custom reviver to pass down to JSON.stringify
*/
function Decoder(reviver) {
var _this;
_classCallCheck(this, Decoder);
_this = _super.call(this);
_this.reviver = reviver;
return _this;
}
/**
* Decodes an encoded packet string into packet JSON.
*
* @param {String} obj - encoded packet
*/
_createClass(Decoder, [{
key: "add",
value: function add(obj) {
var packet;
if (typeof obj === "string") {
packet = this.decodeString(obj);
if (packet.type === PacketType.BINARY_EVENT || packet.type === PacketType.BINARY_ACK) {
// binary packet's json
this.reconstructor = new BinaryReconstructor(packet); // no attachments, labeled binary but no binary data to follow
if (packet.attachments === 0) {
_get(_getPrototypeOf(Decoder.prototype), "emitReserved", this).call(this, "decoded", packet);
}
} else {
// non-binary full packet
_get(_getPrototypeOf(Decoder.prototype), "emitReserved", this).call(this, "decoded", packet);
}
} else if (isBinary(obj) || obj.base64) {
// raw binary data
if (!this.reconstructor) {
throw new Error("got binary data when not reconstructing a packet");
} else {
packet = this.reconstructor.takeBinaryData(obj);
if (packet) {
// received final buffer
this.reconstructor = null;
_get(_getPrototypeOf(Decoder.prototype), "emitReserved", this).call(this, "decoded", packet);
}
}
} else {
throw new Error("Unknown type: " + obj);
}
}
/**
* Decode a packet String (JSON data)
*
* @param {String} str
* @return {Object} packet
*/
}, {
key: "decodeString",
value: function decodeString(str) {
var i = 0; // look up type
var p = {
type: Number(str.charAt(0))
};
if (PacketType[p.type] === undefined) {
throw new Error("unknown packet type " + p.type);
} // look up attachments if type binary
if (p.type === PacketType.BINARY_EVENT || p.type === PacketType.BINARY_ACK) {
var start = i + 1;
while (str.charAt(++i) !== "-" && i != str.length) {}
var buf = str.substring(start, i);
if (buf != Number(buf) || str.charAt(i) !== "-") {
throw new Error("Illegal attachments");
}
p.attachments = Number(buf);
} // look up namespace (if any)
if ("/" === str.charAt(i + 1)) {
var _start = i + 1;
while (++i) {
var c = str.charAt(i);
if ("," === c) break;
if (i === str.length) break;
}
p.nsp = str.substring(_start, i);
} else {
p.nsp = "/";
} // look up id
var next = str.charAt(i + 1);
if ("" !== next && Number(next) == next) {
var _start2 = i + 1;
while (++i) {
var _c = str.charAt(i);
if (null == _c || Number(_c) != _c) {
--i;
break;
}
if (i === str.length) break;
}
p.id = Number(str.substring(_start2, i + 1));
} // look up json data
if (str.charAt(++i)) {
var payload = this.tryParse(str.substr(i));
if (Decoder.isPayloadValid(p.type, payload)) {
p.data = payload;
} else {
throw new Error("invalid payload");
}
}
return p;
}
}, {
key: "tryParse",
value: function tryParse(str) {
try {
return JSON.parse(str, this.reviver);
} catch (e) {
return false;
}
}
}, {
key: "destroy",
value:
/**
* Deallocates a parser's resources
*/
function destroy() {
if (this.reconstructor) {
this.reconstructor.finishedReconstruction();
}
}
}], [{
key: "isPayloadValid",
value: function isPayloadValid(type, payload) {
switch (type) {
case PacketType.CONNECT:
return _typeof(payload) === "object";
case PacketType.DISCONNECT:
return payload === undefined;
case PacketType.CONNECT_ERROR:
return typeof payload === "string" || _typeof(payload) === "object";
case PacketType.EVENT:
case PacketType.BINARY_EVENT:
return Array.isArray(payload) && payload.length > 0;
case PacketType.ACK:
case PacketType.BINARY_ACK:
return Array.isArray(payload);
}
}
}]);
return Decoder;
}(Emitter);
/**
* A manager of a binary event's 'buffer sequence'. Should
* be constructed whenever a packet of type BINARY_EVENT is
* decoded.
*
* @param {Object} packet
* @return {BinaryReconstructor} initialized reconstructor
*/
var BinaryReconstructor = /*#__PURE__*/function () {
function BinaryReconstructor(packet) {
_classCallCheck(this, BinaryReconstructor);
this.packet = packet;
this.buffers = [];
this.reconPack = packet;
}
/**
* Method to be called when binary data received from connection
* after a BINARY_EVENT packet.
*
* @param {Buffer | ArrayBuffer} binData - the raw binary data received
* @return {null | Object} returns null if more binary data is expected or
* a reconstructed packet object if all buffers have been received.
*/
_createClass(BinaryReconstructor, [{
key: "takeBinaryData",
value: function takeBinaryData(binData) {
this.buffers.push(binData);
if (this.buffers.length === this.reconPack.attachments) {
// done with buffer list
var packet = reconstructPacket(this.reconPack, this.buffers);
this.finishedReconstruction();
return packet;
}
return null;
}
/**
* Cleans up binary packet reconstruction variables.
*/
}, {
key: "finishedReconstruction",
value: function finishedReconstruction() {
this.reconPack = null;
this.buffers = [];
}
}]);
return BinaryReconstructor;
}();
var parser = /*#__PURE__*/Object.freeze({
__proto__: null,
protocol: protocol,
get PacketType () { return PacketType; },
Encoder: Encoder,
Decoder: Decoder
});
function on(obj, ev, fn) {
obj.on(ev, fn);
return function subDestroy() {
obj.off(ev, fn);
};
}
/**
* Internal events.
* These events can't be emitted by the user.
*/
var RESERVED_EVENTS = Object.freeze({
connect: 1,
connect_error: 1,
disconnect: 1,
disconnecting: 1,
// EventEmitter reserved events: https://nodejs.org/api/events.html#events_event_newlistener
newListener: 1,
removeListener: 1
});
var Socket = /*#__PURE__*/function (_Emitter) {
_inherits(Socket, _Emitter);
var _super = _createSuper(Socket);
/**
* `Socket` constructor.
*
* @public
*/
function Socket(io, nsp, opts) {
var _this;
_classCallCheck(this, Socket);
_this = _super.call(this);
_this.connected = false;
_this.receiveBuffer = [];
_this.sendBuffer = [];
_this.ids = 0;
_this.acks = {};
_this.flags = {};
_this.io = io;
_this.nsp = nsp;
if (opts && opts.auth) {
_this.auth = opts.auth;
}
if (_this.io._autoConnect) _this.open();
return _this;
}
/**
* Whether the socket is currently disconnected
*/
_createClass(Socket, [{
key: "disconnected",
get: function get() {
return !this.connected;
}
/**
* Subscribe to open, close and packet events
*
* @private
*/
}, {
key: "subEvents",
value: function subEvents() {
if (this.subs) return;
var io = this.io;
this.subs = [on(io, "open", this.onopen.bind(this)), on(io, "packet", this.onpacket.bind(this)), on(io, "error", this.onerror.bind(this)), on(io, "close", this.onclose.bind(this))];
}
/**
* Whether the Socket will try to reconnect when its Manager connects or reconnects
*/
}, {
key: "active",
get: function get() {
return !!this.subs;
}
/**
* "Opens" the socket.
*
* @public
*/
}, {
key: "connect",
value: function connect() {
if (this.connected) return this;
this.subEvents();
if (!this.io["_reconnecting"]) this.io.open(); // ensure open
if ("open" === this.io._readyState) this.onopen();
return this;
}
/**
* Alias for connect()
*/
}, {
key: "open",
value: function open() {
return this.connect();
}
/**
* Sends a `message` event.
*
* @return self
* @public
*/
}, {
key: "send",
value: function send() {
for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
args[_key] = arguments[_key];
}
args.unshift("message");
this.emit.apply(this, args);
return this;
}
/**
* Override `emit`.
* If the event is in `events`, it's emitted normally.
*
* @return self
* @public
*/
}, {
key: "emit",
value: function emit(ev) {
if (RESERVED_EVENTS.hasOwnProperty(ev)) {
throw new Error('"' + ev + '" is a reserved event name');
}
for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
args[_key2 - 1] = arguments[_key2];
}
args.unshift(ev);
var packet = {
type: PacketType.EVENT,
data: args
};
packet.options = {};
packet.options.compress = this.flags.compress !== false; // event ack callback
if ("function" === typeof args[args.length - 1]) {
var id = this.ids++;
var ack = args.pop();
this._registerAckCallback(id, ack);
packet.id = id;
}
var isTransportWritable = this.io.engine && this.io.engine.transport && this.io.engine.transport.writable;
var discardPacket = this.flags["volatile"] && (!isTransportWritable || !this.connected);
if (discardPacket) ; else if (this.connected) {
this.notifyOutgoingListeners(packet);
this.packet(packet);
} else {
this.sendBuffer.push(packet);
}
this.flags = {};
return this;
}
/**
* @private
*/
}, {
key: "_registerAckCallback",
value: function _registerAckCallback(id, ack) {
var _this2 = this;
var timeout = this.flags.timeout;
if (timeout === undefined) {
this.acks[id] = ack;
return;
} // @ts-ignore
var timer = this.io.setTimeoutFn(function () {
delete _this2.acks[id];
for (var i = 0; i < _this2.sendBuffer.length; i++) {
if (_this2.sendBuffer[i].id === id) {
_this2.sendBuffer.splice(i, 1);
}
}
ack.call(_this2, new Error("operation has timed out"));
}, timeout);
this.acks[id] = function () {
// @ts-ignore
_this2.io.clearTimeoutFn(timer);
for (var _len3 = arguments.length, args = new Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {
args[_key3] = arguments[_key3];
}
ack.apply(_this2, [null].concat(args));
};
}
/**
* Sends a packet.
*
* @param packet
* @private
*/
}, {
key: "packet",
value: function packet(_packet) {
_packet.nsp = this.nsp;
this.io._packet(_packet);
}
/**
* Called upon engine `open`.
*
* @private
*/
}, {
key: "onopen",
value: function onopen() {
var _this3 = this;
if (typeof this.auth == "function") {
this.auth(function (data) {
_this3.packet({
type: PacketType.CONNECT,
data: data
});
});
} else {
this.packet({
type: PacketType.CONNECT,
data: this.auth
});
}
}
/**
* Called upon engine or manager `error`.
*
* @param err
* @private
*/
}, {
key: "onerror",
value: function onerror(err) {
if (!this.connected) {
this.emitReserved("connect_error", err);
}
}
/**
* Called upon engine `close`.
*
* @param reason
* @param description
* @private
*/
}, {
key: "onclose",
value: function onclose(reason, description) {
this.connected = false;
delete this.id;
this.emitReserved("disconnect", reason, description);
}
/**
* Called with socket packet.
*
* @param packet
* @private
*/
}, {
key: "onpacket",
value: function onpacket(packet) {
var sameNamespace = packet.nsp === this.nsp;
if (!sameNamespace) return;
switch (packet.type) {
case PacketType.CONNECT:
if (packet.data && packet.data.sid) {
var id = packet.data.sid;
this.onconnect(id);
} else {
this.emitReserved("connect_error", new Error("It seems you are trying to reach a Socket.IO server in v2.x with a v3.x client, but they are not compatible (more information here: https://socket.io/docs/v3/migrating-from-2-x-to-3-0/)"));
}
break;
case PacketType.EVENT:
case PacketType.BINARY_EVENT:
this.onevent(packet);
break;
case PacketType.ACK:
case PacketType.BINARY_ACK:
this.onack(packet);
break;
case PacketType.DISCONNECT:
this.ondisconnect();
break;
case PacketType.CONNECT_ERROR:
this.destroy();
var err = new Error(packet.data.message); // @ts-ignore
err.data = packet.data.data;
this.emitReserved("connect_error", err);
break;
}
}
/**
* Called upon a server event.
*
* @param packet
* @private
*/
}, {
key: "onevent",
value: function onevent(packet) {
var args = packet.data || [];
if (null != packet.id) {
args.push(this.ack(packet.id));
}
if (this.connected) {
this.emitEvent(args);
} else {
this.receiveBuffer.push(Object.freeze(args));
}
}
}, {
key: "emitEvent",
value: function emitEvent(args) {
if (this._anyListeners && this._anyListeners.length) {
var listeners = this._anyListeners.slice();
var _iterator = _createForOfIteratorHelper(listeners),
_step;
try {
for (_iterator.s(); !(_step = _iterator.n()).done;) {
var listener = _step.value;
listener.apply(this, args);
}
} catch (err) {
_iterator.e(err);
} finally {
_iterator.f();
}
}
_get(_getPrototypeOf(Socket.prototype), "emit", this).apply(this, args);
}
/**
* Produces an ack callback to emit with an event.
*
* @private
*/
}, {
key: "ack",
value: function ack(id) {
var self = this;
var sent = false;
return function () {
// prevent double callbacks
if (sent) return;
sent = true;
for (var _len4 = arguments.length, args = new Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {
args[_key4] = arguments[_key4];
}
self.packet({
type: PacketType.ACK,
id: id,
data: args
});
};
}
/**
* Called upon a server acknowlegement.
*
* @param packet
* @private
*/
}, {
key: "onack",
value: function onack(packet) {
var ack = this.acks[packet.id];
if ("function" === typeof ack) {
ack.apply(this, packet.data);
delete this.acks[packet.id];
}
}
/**
* Called upon server connect.
*
* @private
*/
}, {
key: "onconnect",
value: function onconnect(id) {
this.id = id;
this.connected = true;
this.emitBuffered();
this.emitReserved("connect");
}
/**
* Emit buffered events (received and emitted).
*
* @private
*/
}, {
key: "emitBuffered",
value: function emitBuffered() {
var _this4 = this;
this.receiveBuffer.forEach(function (args) {
return _this4.emitEvent(args);
});
this.receiveBuffer = [];
this.sendBuffer.forEach(function (packet) {
_this4.notifyOutgoingListeners(packet);
_this4.packet(packet);
});
this.sendBuffer = [];
}
/**
* Called upon server disconnect.
*
* @private
*/
}, {
key: "ondisconnect",
value: function ondisconnect() {
this.destroy();
this.onclose("io server disconnect");
}
/**
* Called upon forced client/server side disconnections,
* this method ensures the manager stops tracking us and
* that reconnections don't get triggered for this.
*
* @private
*/
}, {
key: "destroy",
value: function destroy() {
if (this.subs) {
// clean subscriptions to avoid reconnections
this.subs.forEach(function (subDestroy) {
return subDestroy();
});
this.subs = undefined;
}
this.io["_destroy"](this);
}
/**
* Disconnects the socket manually.
*
* @return self
* @public
*/
}, {
key: "disconnect",
value: function disconnect() {
if (this.connected) {
this.packet({
type: PacketType.DISCONNECT
});
} // remove socket from pool
this.destroy();
if (this.connected) {
// fire events
this.onclose("io client disconnect");
}
return this;
}
/**
* Alias for disconnect()
*
* @return self
* @public
*/
}, {
key: "close",
value: function close() {
return this.disconnect();
}
/**
* Sets the compress flag.
*
* @param compress - if `true`, compresses the sending data
* @return self
* @public
*/
}, {
key: "compress",
value: function compress(_compress) {
this.flags.compress = _compress;
return this;
}
/**
* Sets a modifier for a subsequent event emission that the event message will be dropped when this socket is not
* ready to send messages.
*
* @returns self
* @public
*/
}, {
key: "volatile",
get: function get() {
this.flags["volatile"] = true;
return this;
}
/**
* Sets a modifier for a subsequent event emission that the callback will be called with an error when the
* given number of milliseconds have elapsed without an acknowledgement from the server:
*
* ```
* socket.timeout(5000).emit("my-event", (err) => {
* if (err) {
* // the server did not acknowledge the event in the given delay
* }
* });
* ```
*
* @returns self
* @public
*/
}, {
key: "timeout",
value: function timeout(_timeout) {
this.flags.timeout = _timeout;
return 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.
*
* @param listener
* @public
*/
}, {
key: "onAny",
value: function onAny(listener) {
this._anyListeners = this._anyListeners || [];
this._anyListeners.push(listener);
return 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.
*
* @param listener
* @public
*/
}, {
key: "prependAny",
value: function prependAny(listener) {
this._anyListeners = this._anyListeners || [];
this._anyListeners.unshift(listener);
return this;
}
/**
* Removes the listener that will be fired when any event is emitted.
*
* @param listener
* @public
*/
}, {
key: "offAny",
value: function offAny(listener) {
if (!this._anyListeners) {
return this;
}
if (listener) {
var listeners = this._anyListeners;
for (var i = 0; i < listeners.length; i++) {
if (listener === listeners[i]) {
listeners.splice(i, 1);
return this;
}
}
} else {
this._anyListeners = [];
}
return 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.
*
* @public
*/
}, {
key: "listenersAny",
value: function listenersAny() {
return this._anyListeners || [];
}
/**
* Adds a listener that will be fired when any event is emitted. The event name is passed as the first argument to the
* callback.
*
* @param listener
*
* <pre><code>
*
* socket.onAnyOutgoing((event, ...args) => {
* console.log(event);
* });
*
* </pre></code>
*
* @public
*/
}, {
key: "onAnyOutgoing",
value: function onAnyOutgoing(listener) {
this._anyOutgoingListeners = this._anyOutgoingListeners || [];
this._anyOutgoingListeners.push(listener);
return 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.
*
* @param listener
*
* <pre><code>
*
* socket.prependAnyOutgoing((event, ...args) => {
* console.log(event);
* });
*
* </pre></code>
*
* @public
*/
}, {
key: "prependAnyOutgoing",
value: function prependAnyOutgoing(listener) {
this._anyOutgoingListeners = this._anyOutgoingListeners || [];
this._anyOutgoingListeners.unshift(listener);
return this;
}
/**
* Removes the listener that will be fired when any event is emitted.
*
* @param listener
*
* <pre><code>
*
* const handler = (event, ...args) => {
* console.log(event);
* }
*
* socket.onAnyOutgoing(handler);
*
* // then later
* socket.offAnyOutgoing(handler);
*
* </pre></code>
*
* @public
*/
}, {
key: "offAnyOutgoing",
value: function offAnyOutgoing(listener) {
if (!this._anyOutgoingListeners) {
return this;
}
if (listener) {
var listeners = this._anyOutgoingListeners;
for (var i = 0; i < listeners.length; i++) {
if (listener === listeners[i]) {
listeners.splice(i, 1);
return this;
}
}
} else {
this._anyOutgoingListeners = [];
}
return 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.
*
* @public
*/
}, {
key: "listenersAnyOutgoing",
value: function listenersAnyOutgoing() {
return this._anyOutgoingListeners || [];
}
/**
* Notify the listeners for each packet sent
*
* @param packet
*
* @private
*/
}, {
key: "notifyOutgoingListeners",
value: function notifyOutgoingListeners(packet) {
if (this._anyOutgoingListeners && this._anyOutgoingListeners.length) {
var listeners = this._anyOutgoingListeners.slice();
var _iterator2 = _createForOfIteratorHelper(listeners),
_step2;
try {
for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
var listener = _step2.value;
listener.apply(this, packet.data);
}
} catch (err) {
_iterator2.e(err);
} finally {
_iterator2.f();
}
}
}
}]);
return Socket;
}(Emitter);
/**
* Initialize backoff timer with `opts`.
*
* - `min` initial timeout in milliseconds [100]
* - `max` max timeout [10000]
* - `jitter` [0]
* - `factor` [2]
*
* @param {Object} opts
* @api public
*/
function Backoff(opts) {
opts = opts || {};
this.ms = opts.min || 100;
this.max = opts.max || 10000;
this.factor = opts.factor || 2;
this.jitter = opts.jitter > 0 && opts.jitter <= 1 ? opts.jitter : 0;
this.attempts = 0;
}
/**
* Return the backoff duration.
*
* @return {Number}
* @api public
*/
Backoff.prototype.duration = function () {
var ms = this.ms * Math.pow(this.factor, this.attempts++);
if (this.jitter) {
var rand = Math.random();
var deviation = Math.floor(rand * this.jitter * ms);
ms = (Math.floor(rand * 10) & 1) == 0 ? ms - deviation : ms + deviation;
}
return Math.min(ms, this.max) | 0;
};
/**
* Reset the number of attempts.
*
* @api public
*/
Backoff.prototype.reset = function () {
this.attempts = 0;
};
/**
* Set the minimum duration
*
* @api public
*/
Backoff.prototype.setMin = function (min) {
this.ms = min;
};
/**
* Set the maximum duration
*
* @api public
*/
Backoff.prototype.setMax = function (max) {
this.max = max;
};
/**
* Set the jitter
*
* @api public
*/
Backoff.prototype.setJitter = function (jitter) {
this.jitter = jitter;
};
var Manager = /*#__PURE__*/function (_Emitter) {
_inherits(Manager, _Emitter);
var _super = _createSuper(Manager);
function Manager(uri, opts) {
var _this;
_classCallCheck(this, Manager);
var _a;
_this = _super.call(this);
_this.nsps = {};
_this.subs = [];
if (uri && "object" === _typeof(uri)) {
opts = uri;
uri = undefined;
}
opts = opts || {};
opts.path = opts.path || "/socket.io";
_this.opts = opts;
installTimerFunctions(_assertThisInitialized(_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 Backoff({
min: _this.reconnectionDelay(),
max: _this.reconnectionDelayMax(),
jitter: _this.randomizationFactor()
});
_this.timeout(null == opts.timeout ? 20000 : opts.timeout);
_this._readyState = "closed";
_this.uri = uri;
var _parser = opts.parser || parser;
_this.encoder = new _parser.Encoder();
_this.decoder = new _parser.Decoder();
_this._autoConnect = opts.autoConnect !== false;
if (_this._autoConnect) _this.open();
return _this;
}
_createClass(Manager, [{
key: "reconnection",
value: function reconnection(v) {
if (!arguments.length) return this._reconnection;
this._reconnection = !!v;
return this;
}
}, {
key: "reconnectionAttempts",
value: function reconnectionAttempts(v) {
if (v === undefined) return this._reconnectionAttempts;
this._reconnectionAttempts = v;
return this;
}
}, {
key: "reconnectionDelay",
value: function 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;
}
}, {
key: "randomizationFactor",
value: function 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;
}
}, {
key: "reconnectionDelayMax",
value: function 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;
}
}, {
key: "timeout",
value: function 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
*/
}, {
key: "maybeReconnectOnOpen",
value: function 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
*/
}, {
key: "open",
value: function open(fn) {
var _this2 = this;
if (~this._readyState.indexOf("open")) return this;
this.engine = new Socket$1(this.uri, this.opts);
var socket = this.engine;
var self = this;
this._readyState = "opening";
this.skipReconnect = false; // emit `open`
var openSubDestroy = on(socket, "open", function () {
self.onopen();
fn && fn();
}); // emit `error`
var errorSub = on(socket, "error", function (err) {
self.cleanup();
self._readyState = "closed";
_this2.emitReserved("error", err);
if (fn) {
fn(err);
} else {
// Only do this if there is no fn to handle the error
self.maybeReconnectOnOpen();
}
});
if (false !== this._timeout) {
var timeout = this._timeout;
if (timeout === 0) {
openSubDestroy(); // prevents a race condition with the 'open' event
} // set timer
var timer = this.setTimeoutFn(function () {
openSubDestroy();
socket.close(); // @ts-ignore
socket.emit("error", new Error("timeout"));
}, timeout);
if (this.opts.autoUnref) {
timer.unref();
}
this.subs.push(function subDestroy() {
clearTimeout(timer);
});
}
this.subs.push(openSubDestroy);
this.subs.push(errorSub);
return this;
}
/**
* Alias for open()
*
* @return self
* @public
*/
}, {
key: "connect",
value: function connect(fn) {
return this.open(fn);
}
/**
* Called upon transport open.
*
* @private
*/
}, {
key: "onopen",
value: function onopen() {
// clear old subs
this.cleanup(); // mark as open
this._readyState = "open";
this.emitReserved("open"); // add new subs
var socket = this.engine;
this.subs.push(on(socket, "ping", this.onping.bind(this)), on(socket, "data", this.ondata.bind(this)), on(socket, "error", this.onerror.bind(this)), on(socket, "close", this.onclose.bind(this)), on(this.decoder, "decoded", this.ondecoded.bind(this)));
}
/**
* Called upon a ping.
*
* @private
*/
}, {
key: "onping",
value: function onping() {
this.emitReserved("ping");
}
/**
* Called with data.
*
* @private
*/
}, {
key: "ondata",
value: function ondata(data) {
this.decoder.add(data);
}
/**
* Called when parser fully decodes a packet.
*
* @private
*/
}, {
key: "ondecoded",
value: function ondecoded(packet) {
this.emitReserved("packet", packet);
}
/**
* Called upon socket error.
*
* @private
*/
}, {
key: "onerror",
value: function onerror(err) {
this.emitReserved("error", err);
}
/**
* Creates a new socket for the given `nsp`.
*
* @return {Socket}
* @public
*/
}, {
key: "socket",
value: function socket(nsp, opts) {
var socket = this.nsps[nsp];
if (!socket) {
socket = new Socket(this, nsp, opts);
this.nsps[nsp] = socket;
}
return socket;
}
/**
* Called upon a socket close.
*
* @param socket
* @private
*/
}, {
key: "_destroy",
value: function _destroy(socket) {
var nsps = Object.keys(this.nsps);
for (var _i = 0, _nsps = nsps; _i < _nsps.length; _i++) {
var nsp = _nsps[_i];
var _socket = this.nsps[nsp];
if (_socket.active) {
return;
}
}
this._close();
}
/**
* Writes a packet.
*
* @param packet
* @private
*/
}, {
key: "_packet",
value: function _packet(packet) {
var encodedPackets = this.encoder.encode(packet);
for (var i = 0; i < encodedPackets.length; i++) {
this.engine.write(encodedPackets[i], packet.options);
}
}
/**
* Clean up transport subscriptions and packet buffer.
*
* @private
*/
}, {
key: "cleanup",
value: function cleanup() {
this.subs.forEach(function (subDestroy) {
return subDestroy();
});
this.subs.length = 0;
this.decoder.destroy();
}
/**
* Close the current socket.
*
* @private
*/
}, {
key: "_close",
value: function _close() {
this.skipReconnect = true;
this._reconnecting = false;
this.onclose("forced close");
if (this.engine) this.engine.close();
}
/**
* Alias for close()
*
* @private
*/
}, {
key: "disconnect",
value: function disconnect() {
return this._close();
}
/**
* Called upon engine close.
*
* @private
*/
}, {
key: "onclose",
value: function onclose(reason, description) {
this.cleanup();
this.backoff.reset();
this._readyState = "closed";
this.emitReserved("close", reason, description);
if (this._reconnection && !this.skipReconnect) {
this.reconnect();
}
}
/**
* Attempt a reconnection.
*
* @private
*/
}, {
key: "reconnect",
value: function reconnect() {
var _this3 = this;
if (this._reconnecting || this.skipReconnect) return this;
var self = this;
if (this.backoff.attempts >= this._reconnectionAttempts) {
this.backoff.reset();
this.emitReserved("reconnect_failed");
this._reconnecting = false;
} else {
var delay = this.backoff.duration();
this._reconnecting = true;
var timer = this.setTimeoutFn(function () {
if (self.skipReconnect) return;
_this3.emitReserved("reconnect_attempt", self.backoff.attempts); // check again for the case socket closed in above events
if (self.skipReconnect) return;
self.open(function (err) {
if (err) {
self._reconnecting = false;
self.reconnect();
_this3.emitReserved("reconnect_error", err);
} else {
self.onreconnect();
}
});
}, delay);
if (this.opts.autoUnref) {
timer.unref();
}
this.subs.push(function subDestroy() {
clearTimeout(timer);
});
}
}
/**
* Called upon successful reconnect.
*
* @private
*/
}, {
key: "onreconnect",
value: function onreconnect() {
var attempt = this.backoff.attempts;
this._reconnecting = false;
this.backoff.reset();
this.emitReserved("reconnect", attempt);
}
}]);
return Manager;
}(Emitter);
/**
* Managers cache.
*/
var cache = {};
function lookup(uri, opts) {
if (_typeof(uri) === "object") {
opts = uri;
uri = undefined;
}
opts = opts || {};
var parsed = url(uri, opts.path || "/socket.io");
var source = parsed.source;
var id = parsed.id;
var path = parsed.path;
var sameNamespace = cache[id] && path in cache[id]["nsps"];
var newConnection = opts.forceNew || opts["force new connection"] || false === opts.multiplex || sameNamespace;
var io;
if (newConnection) {
io = new Manager(source, opts);
} else {
if (!cache[id]) {
cache[id] = new Manager(source, opts);
}
io = cache[id];
}
if (parsed.query && !opts.query) {
opts.query = parsed.queryKey;
}
return io.socket(parsed.path, opts);
} // so that "lookup" can be used both as a function (e.g. `io(...)`) and as a
// namespace (e.g. `io.connect(...)`), for backward compatibility
_extends(lookup, {
Manager: Manager,
Socket: Socket,
io: lookup,
connect: lookup
});
return lookup;
}));
//# sourceMappingURL=socket.io.js.map