socket.io
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node.js realtime framework server
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JavaScript
/*!
* 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();
}
}, fal