File: //home/arjun/projects/buyercall/node_modules/engine.io-client/dist/engine.io.js
/*!
* Engine.IO v6.5.3
* (c) 2014-2023 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.eio = 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 {
Date.prototype.toString.call(Reflect.construct(Date, [], 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;
}
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) {
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function _get(target, property, receiver) {
if (typeof Reflect !== "undefined" && Reflect.get) {
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_get = function _get(target, property, receiver) {
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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);
}
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 = typeof Blob === "function" || typeof Blob !== "undefined" && Object.prototype.toString.call(Blob) === "[object BlobConstructor]";
var withNativeArrayBuffer$1 = typeof ArrayBuffer === "function";
// ArrayBuffer.isView method is not defined in IE10
var isView = 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 && data instanceof Blob) {
if (supportsBinary) {
return callback(data);
} else {
return encodeBlobAsBase64(data, callback);
}
} else if (withNativeArrayBuffer$1 && (data instanceof ArrayBuffer || isView(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);
};
function toArray(data) {
if (data instanceof Uint8Array) {
return data;
} else if (data instanceof ArrayBuffer) {
return new Uint8Array(data);
} else {
return new Uint8Array(data.buffer, data.byteOffset, data.byteLength);
}
}
var TEXT_ENCODER;
function encodePacketToBinary(packet, callback) {
if (withNativeBlob && packet.data instanceof Blob) {
return packet.data.arrayBuffer().then(toArray).then(callback);
} else if (withNativeArrayBuffer$1 && (packet.data instanceof ArrayBuffer || isView(packet.data))) {
return callback(toArray(packet.data));
}
encodePacket(packet, false, function (encoded) {
if (!TEXT_ENCODER) {
TEXT_ENCODER = new TextEncoder();
}
callback(TEXT_ENCODER.encode(encoded));
});
}
// imported from https://github.com/socketio/base64-arraybuffer
var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
// Use a lookup table to find the index.
var lookup = typeof Uint8Array === 'undefined' ? [] : new Uint8Array(256);
for (var i$1 = 0; i$1 < chars.length; i$1++) {
lookup[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[base64.charCodeAt(i)];
encoded2 = lookup[base64.charCodeAt(i + 1)];
encoded3 = lookup[base64.charCodeAt(i + 2)];
encoded4 = lookup[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 = 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) {
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":
if (data instanceof Blob) {
// from WebSocket + binaryType "blob"
return data;
} else {
// from HTTP long-polling or WebTransport
return new Blob([data]);
}
case "arraybuffer":
default:
if (data instanceof ArrayBuffer) {
// from HTTP long-polling (base64) or WebSocket + binaryType "arraybuffer"
return data;
} else {
// from WebTransport (Uint8Array)
return data.buffer;
}
}
};
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;
};
function createPacketEncoderStream() {
return new TransformStream({
transform: function transform(packet, controller) {
encodePacketToBinary(packet, function (encodedPacket) {
var payloadLength = encodedPacket.length;
var header;
// inspired by the WebSocket format: https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API/Writing_WebSocket_servers#decoding_payload_length
if (payloadLength < 126) {
header = new Uint8Array(1);
new DataView(header.buffer).setUint8(0, payloadLength);
} else if (payloadLength < 65536) {
header = new Uint8Array(3);
var view = new DataView(header.buffer);
view.setUint8(0, 126);
view.setUint16(1, payloadLength);
} else {
header = new Uint8Array(9);
var _view = new DataView(header.buffer);
_view.setUint8(0, 127);
_view.setBigUint64(1, BigInt(payloadLength));
}
// first bit indicates whether the payload is plain text (0) or binary (1)
if (packet.data && typeof packet.data !== "string") {
header[0] |= 0x80;
}
controller.enqueue(header);
controller.enqueue(encodedPacket);
});
}
});
}
var TEXT_DECODER;
function totalLength(chunks) {
return chunks.reduce(function (acc, chunk) {
return acc + chunk.length;
}, 0);
}
function concatChunks(chunks, size) {
if (chunks[0].length === size) {
return chunks.shift();
}
var buffer = new Uint8Array(size);
var j = 0;
for (var i = 0; i < size; i++) {
buffer[i] = chunks[0][j++];
if (j === chunks[0].length) {
chunks.shift();
j = 0;
}
}
if (chunks.length && j < chunks[0].length) {
chunks[0] = chunks[0].slice(j);
}
return buffer;
}
function createPacketDecoderStream(maxPayload, binaryType) {
if (!TEXT_DECODER) {
TEXT_DECODER = new TextDecoder();
}
var chunks = [];
var state = 0 /* READ_HEADER */;
var expectedLength = -1;
var isBinary = false;
return new TransformStream({
transform: function transform(chunk, controller) {
chunks.push(chunk);
while (true) {
if (state === 0 /* READ_HEADER */) {
if (totalLength(chunks) < 1) {
break;
}
var header = concatChunks(chunks, 1);
isBinary = (header[0] & 0x80) === 0x80;
expectedLength = header[0] & 0x7f;
if (expectedLength < 126) {
state = 3 /* READ_PAYLOAD */;
} else if (expectedLength === 126) {
state = 1 /* READ_EXTENDED_LENGTH_16 */;
} else {
state = 2 /* READ_EXTENDED_LENGTH_64 */;
}
} else if (state === 1 /* READ_EXTENDED_LENGTH_16 */) {
if (totalLength(chunks) < 2) {
break;
}
var headerArray = concatChunks(chunks, 2);
expectedLength = new DataView(headerArray.buffer, headerArray.byteOffset, headerArray.length).getUint16(0);
state = 3 /* READ_PAYLOAD */;
} else if (state === 2 /* READ_EXTENDED_LENGTH_64 */) {
if (totalLength(chunks) < 8) {
break;
}
var _headerArray = concatChunks(chunks, 8);
var view = new DataView(_headerArray.buffer, _headerArray.byteOffset, _headerArray.length);
var n = view.getUint32(0);
if (n > Math.pow(2, 53 - 32) - 1) {
// the maximum safe integer in JavaScript is 2^53 - 1
controller.enqueue(ERROR_PACKET);
break;
}
expectedLength = n * Math.pow(2, 32) + view.getUint32(4);
state = 3 /* READ_PAYLOAD */;
} else {
if (totalLength(chunks) < expectedLength) {
break;
}
var data = concatChunks(chunks, expectedLength);
controller.enqueue(decodePacket(isBinary ? data : TEXT_DECODER.decode(data), binaryType));
state = 0 /* READ_HEADER */;
}
if (expectedLength === 0 || expectedLength > maxPayload) {
controller.enqueue(ERROR_PACKET);
break;
}
}
}
});
}
var protocol = 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 globalThisShim = 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 = globalThisShim.setTimeout;
var NATIVE_CLEAR_TIMEOUT = globalThisShim.clearTimeout;
function installTimerFunctions(obj, opts) {
if (opts.useNativeTimers) {
obj.setTimeoutFn = NATIVE_SET_TIMEOUT.bind(globalThisShim);
obj.clearTimeoutFn = NATIVE_CLEAR_TIMEOUT.bind(globalThisShim);
} else {
obj.setTimeoutFn = globalThisShim.setTimeout.bind(globalThisShim);
obj.clearTimeoutFn = globalThisShim.clearTimeout.bind(globalThisShim);
}
}
// 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;
}
// imported from https://github.com/galkn/querystring
/**
* Compiles a querystring
* Returns string representation of the object
*
* @param {Object}
* @api private
*/
function encode$1(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;
}
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} opts - options
* @protected
*/
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.socket = opts.socket;
return _this2;
}
/**
* Emits an error.
*
* @param {String} reason
* @param description
* @param context - the error context
* @return {Transport} for chaining
* @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.
*/
}, {
key: "open",
value: function open() {
this.readyState = "opening";
this.doOpen();
return this;
}
/**
* Closes the transport.
*/
}, {
key: "close",
value: function close() {
if (this.readyState === "opening" || this.readyState === "open") {
this.doClose();
this.onClose();
}
return this;
}
/**
* Sends multiple packets.
*
* @param {Array} packets
*/
}, {
key: "send",
value: function send(packets) {
if (this.readyState === "open") {
this.write(packets);
}
}
/**
* Called upon open
*
* @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
* @protected
*/
}, {
key: "onData",
value: function onData(data) {
var packet = decodePacket(data, this.socket.binaryType);
this.onPacket(packet);
}
/**
* Called with a decoded packet.
*
* @protected
*/
}, {
key: "onPacket",
value: function onPacket(packet) {
_get(_getPrototypeOf(Transport.prototype), "emitReserved", this).call(this, "packet", packet);
}
/**
* Called upon close.
*
* @protected
*/
}, {
key: "onClose",
value: function onClose(details) {
this.readyState = "closed";
_get(_getPrototypeOf(Transport.prototype), "emitReserved", this).call(this, "close", details);
}
/**
* Pauses the transport, in order not to lose packets during an upgrade.
*
* @param onPause
*/
}, {
key: "pause",
value: function pause(onPause) {}
}, {
key: "createUri",
value: function createUri(schema) {
var query = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
return schema + "://" + this._hostname() + this._port() + this.opts.path + this._query(query);
}
}, {
key: "_hostname",
value: function _hostname() {
var hostname = this.opts.hostname;
return hostname.indexOf(":") === -1 ? hostname : "[" + hostname + "]";
}
}, {
key: "_port",
value: function _port() {
if (this.opts.port && (this.opts.secure && Number(this.opts.port !== 443) || !this.opts.secure && Number(this.opts.port) !== 80)) {
return ":" + this.opts.port;
} else {
return "";
}
}
}, {
key: "_query",
value: function _query(query) {
var encodedQuery = encode$1(query);
return encodedQuery.length ? "?" + encodedQuery : "";
}
}]);
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(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(+new Date());
if (now !== prev) return seed = 0, prev = now;
return now + '.' + encode(seed++);
}
//
// Map each character to its index.
//
for (; i < length; i++) {
map[alphabet[i]] = i;
}
// 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 XHR(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 globalThisShim[["Active"].concat("Object").join("X")]("Microsoft.XMLHTTP");
} catch (e) {}
}
}
function createCookieJar() {}
function empty() {}
var hasXHR2 = function () {
var xhr = new XHR({
xdomain: false
});
return null != xhr.responseType;
}();
var Polling = /*#__PURE__*/function (_Transport) {
_inherits(Polling, _Transport);
var _super = _createSuper(Polling);
/**
* XHR Polling constructor.
*
* @param {Object} opts
* @package
*/
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;
}
/**
* XHR supports binary
*/
var forceBase64 = opts && opts.forceBase64;
_this.supportsBinary = hasXHR2 && !forceBase64;
if (_this.opts.withCredentials) {
_this.cookieJar = createCookieJar();
}
return _this;
}
_createClass(Polling, [{
key: "doOpen",
/**
* Opens the socket (triggers polling). We write a PING message to determine
* when the transport is open.
*
* @protected
*/
value: function doOpen() {
this.poll();
}
/**
* Pauses polling.
*
* @param {Function} onPause - callback upon buffers are flushed and transport is paused
* @package
*/
}, {
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.
*
* @private
*/
}, {
key: "poll",
value: function poll() {
this.polling = true;
this.doPoll();
this.emitReserved("poll");
}
/**
* Overloads onData to detect payloads.
*
* @protected
*/
}, {
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.
*
* @protected
*/
}, {
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} packets - data packets
* @protected
*/
}, {
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.
*
* @private
*/
}, {
key: "uri",
value: function uri() {
var schema = this.opts.secure ? "https" : "http";
var query = this.query || {};
// cache busting is forced
if (false !== this.opts.timestampRequests) {
query[this.opts.timestampParam] = yeast();
}
if (!this.supportsBinary && !query.sid) {
query.b64 = 1;
}
return this.createUri(schema, query);
}
/**
* Creates a request.
*
* @param {String} method
* @private
*/
}, {
key: "request",
value: function request() {
var opts = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
_extends(opts, {
xd: this.xd,
cookieJar: this.cookieJar
}, this.opts);
return new Request(this.uri(), opts);
}
/**
* Sends data.
*
* @param {String} data to send.
* @param {Function} called upon flush.
* @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.
*
* @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;
}
}, {
key: "name",
get: function get() {
return "polling";
}
}]);
return Polling;
}(Transport);
var Request = /*#__PURE__*/function (_Emitter) {
_inherits(Request, _Emitter);
var _super2 = _createSuper(Request);
/**
* Request constructor
*
* @param {Object} options
* @package
*/
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.data = undefined !== opts.data ? opts.data : null;
_this8.create();
return _this8;
}
/**
* Creates the XHR object and sends the request.
*
* @private
*/
_createClass(Request, [{
key: "create",
value: function create() {
var _this9 = this;
var _a;
var opts = pick(this.opts, "agent", "pfx", "key", "passphrase", "cert", "ca", "ciphers", "rejectUnauthorized", "autoUnref");
opts.xdomain = !!this.opts.xd;
var xhr = this.xhr = new XHR(opts);
try {
xhr.open(this.method, this.uri, true);
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) {}
(_a = this.opts.cookieJar) === null || _a === void 0 ? void 0 : _a.addCookies(xhr);
// ie6 check
if ("withCredentials" in xhr) {
xhr.withCredentials = this.opts.withCredentials;
}
if (this.opts.requestTimeout) {
xhr.timeout = this.opts.requestTimeout;
}
xhr.onreadystatechange = function () {
var _a;
if (xhr.readyState === 3) {
(_a = _this9.opts.cookieJar) === null || _a === void 0 ? void 0 : _a.parseCookies(xhr);
}
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.
*
* @private
*/
}, {
key: "onError",
value: function onError(err) {
this.emitReserved("error", err, this.xhr);
this.cleanup(true);
}
/**
* Cleans up house.
*
* @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.
*
* @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.
*
* @package
*/
}, {
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 globalThisShim ? "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 = globalThisShim.WebSocket || globalThisShim.MozWebSocket;
var usingBrowserWebSocket = true;
var defaultBinaryType = "arraybuffer";
// detect ReactNative environment
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.
*
* @param {Object} opts - connection options
* @protected
*/
function WS(opts) {
var _this;
_classCallCheck(this, WS);
_this = _super.call(this, opts);
_this.supportsBinary = !opts.forceBase64;
return _this;
}
_createClass(WS, [{
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;
this.addEventListeners();
}
/**
* Adds event listeners to the socket
*
* @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);
};
}
}, {
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 = {};
// Sometimes the websocket has already been closed but the browser didn't
// 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);
}
}
}, {
key: "doClose",
value: function doClose() {
if (typeof this.ws !== "undefined") {
this.ws.close();
this.ws = null;
}
}
/**
* Generates uri for connection.
*
* @private
*/
}, {
key: "uri",
value: function uri() {
var schema = this.opts.secure ? "wss" : "ws";
var query = this.query || {};
// append timestamp to URI
if (this.opts.timestampRequests) {
query[this.opts.timestampParam] = yeast();
}
// communicate binary support capabilities
if (!this.supportsBinary) {
query.b64 = 1;
}
return this.createUri(schema, query);
}
/**
* Feature detection for WebSocket.
*
* @return {Boolean} whether this transport is available.
* @private
*/
}, {
key: "check",
value: function check() {
return !!WebSocket;
}
}, {
key: "name",
get: function get() {
return "websocket";
}
}]);
return WS;
}(Transport);
var WT = /*#__PURE__*/function (_Transport) {
_inherits(WT, _Transport);
var _super = _createSuper(WT);
function WT() {
_classCallCheck(this, WT);
return _super.apply(this, arguments);
}
_createClass(WT, [{
key: "doOpen",
value: function doOpen() {
var _this = this;
// @ts-ignore
if (typeof WebTransport !== "function") {
return;
}
// @ts-ignore
this.transport = new WebTransport(this.createUri("https"), this.opts.transportOptions[this.name]);
this.transport.closed.then(function () {
_this.onClose();
})["catch"](function (err) {
_this.onError("webtransport error", err);
});
// note: we could have used async/await, but that would require some additional polyfills
this.transport.ready.then(function () {
_this.transport.createBidirectionalStream().then(function (stream) {
var decoderStream = createPacketDecoderStream(Number.MAX_SAFE_INTEGER, _this.socket.binaryType);
var reader = stream.readable.pipeThrough(decoderStream).getReader();
var encoderStream = createPacketEncoderStream();
encoderStream.readable.pipeTo(stream.writable);
_this.writer = encoderStream.writable.getWriter();
var read = function read() {
reader.read().then(function (_ref) {
var done = _ref.done,
value = _ref.value;
if (done) {
return;
}
_this.onPacket(value);
read();
})["catch"](function (err) {});
};
read();
var packet = {
type: "open"
};
if (_this.query.sid) {
packet.data = "{\"sid\":\"".concat(_this.query.sid, "\"}");
}
_this.writer.write(packet).then(function () {
return _this.onOpen();
});
});
});
}
}, {
key: "write",
value: function write(packets) {
var _this2 = this;
this.writable = false;
var _loop = function _loop(i) {
var packet = packets[i];
var lastPacket = i === packets.length - 1;
_this2.writer.write(packet).then(function () {
if (lastPacket) {
nextTick(function () {
_this2.writable = true;
_this2.emitReserved("drain");
}, _this2.setTimeoutFn);
}
});
};
for (var i = 0; i < packets.length; i++) {
_loop(i);
}
}
}, {
key: "doClose",
value: function doClose() {
var _a;
(_a = this.transport) === null || _a === void 0 ? void 0 : _a.close();
}
}, {
key: "name",
get: function get() {
return "webtransport";
}
}]);
return WT;
}(Transport);
var transports = {
websocket: WS,
webtransport: WT,
polling: Polling
};
// imported from https://github.com/galkn/parseuri
/**
* Parses a URI
*
* Note: we could also have used the built-in URL object, but it isn't supported on all platforms.
*
* See:
* - https://developer.mozilla.org/en-US/docs/Web/API/URL
* - https://caniuse.com/url
* - https://www.rfc-editor.org/rfc/rfc3986#appendix-B
*
* History of the parse() method:
* - first commit: https://github.com/socketio/socket.io-client/commit/4ee1d5d94b3906a9c052b459f1a818b15f38f91c
* - export into its own module: https://github.com/socketio/engine.io-client/commit/de2c561e4564efeb78f1bdb1ba39ef81b2822cb3
* - reimport: https://github.com/socketio/engine.io-client/commit/df32277c3f6d622eec5ed09f493cae3f3391d242
*
* @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) {
if (str.length > 2000) {
throw "URI too long";
}
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.slice(0, 1) == '/' || path.length === 0) {
names.splice(0, 1);
}
if (path.slice(-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] = $2;
}
});
return data;
}
var Socket = /*#__PURE__*/function (_Emitter) {
_inherits(Socket, _Emitter);
var _super = _createSuper(Socket);
/**
* Socket constructor.
*
* @param {String|Object} uri - uri or options
* @param {Object} opts - options
*/
function Socket(uri) {
var _this;
var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
_classCallCheck(this, Socket);
_this = _super.call(this);
_this.binaryType = defaultBinaryType;
_this.writeBuffer = [];
if (uri && "object" === _typeof(uri)) {
opts = uri;
uri = null;
}
if (uri) {
uri = parse(uri);
opts.hostname = uri.host;
opts.secure = uri.protocol === "https" || uri.protocol === "wss";
opts.port = uri.port;
if (uri.query) opts.query = uri.query;
} else if (opts.host) {
opts.hostname = parse(opts.host).host;
}
installTimerFunctions(_assertThisInitialized(_this), opts);
_this.secure = null != opts.secure ? opts.secure : typeof location !== "undefined" && "https:" === location.protocol;
if (opts.hostname && !opts.port) {
// if no port is specified manually, use the protocol default
opts.port = _this.secure ? "443" : "80";
}
_this.hostname = opts.hostname || (typeof location !== "undefined" ? location.hostname : "localhost");
_this.port = opts.port || (typeof location !== "undefined" && location.port ? location.port : _this.secure ? "443" : "80");
_this.transports = opts.transports || ["polling", "websocket", "webtransport"];
_this.writeBuffer = [];
_this.prevBufferLen = 0;
_this.opts = _extends({
path: "/engine.io",
agent: false,
withCredentials: false,
upgrade: true,
timestampParam: "t",
rememberUpgrade: false,
addTrailingSlash: true,
rejectUnauthorized: true,
perMessageDeflate: {
threshold: 1024
},
transportOptions: {},
closeOnBeforeunload: false
}, opts);
_this.opts.path = _this.opts.path.replace(/\/$/, "") + (_this.opts.addTrailingSlash ? "/" : "");
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)
_this.beforeunloadEventListener = function () {
if (_this.transport) {
// silently close the transport
_this.transport.removeAllListeners();
_this.transport.close();
}
};
addEventListener("beforeunload", _this.beforeunloadEventListener, 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} name - transport name
* @return {Transport}
* @private
*/
_createClass(Socket, [{
key: "createTransport",
value: function createTransport(name) {
var query = _extends({}, this.opts.query);
// append engine.io protocol identifier
query.EIO = protocol;
// transport name
query.transport = name;
// session id if we already have one
if (this.id) query.sid = this.id;
var opts = _extends({}, this.opts, {
query: query,
socket: this,
hostname: this.hostname,
secure: this.secure,
port: this.port
}, this.opts.transportOptions[name]);
return new transports[name](opts);
}
/**
* Initializes transport to use and starts probe.
*
* @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).
*
* @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} name - transport name
* @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);
if (this.upgrades.indexOf("webtransport") !== -1 && name !== "webtransport") {
// favor WebTransport
this.setTimeoutFn(function () {
if (!failed) {
transport.open();
}
}, 200);
} else {
transport.open();
}
}
/**
* Called when connection is deemed open.
*
* @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) {
var i = 0;
var l = this.upgrades.length;
for (; i < l; i++) {
this.probe(this.upgrades[i]);
}
}
}
/**
* Handles a packet.
*
* @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");
this.resetPingTimeout();
switch (packet.type) {
case "open":
this.onHandshake(JSON.parse(packet.data));
break;
case "ping":
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
* @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.
*
* @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
*
* @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.
*
* @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} msg - message.
* @param {Object} options.
* @param {Function} callback function.
* @return {Socket} for chaining.
*/
}, {
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} type: packet type.
* @param {String} data.
* @param {Object} options.
* @param {Function} fn - callback function.
* @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.
*/
}, {
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
*
* @private
*/
}, {
key: "onError",
value: function onError(err) {
Socket.priorWebsocketSuccess = false;
this.emitReserved("error", err);
this.onClose("transport error", err);
}
/**
* Called upon transport close.
*
* @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("beforeunload", this.beforeunloadEventListener, false);
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} upgrades - server upgrades
* @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.protocol = protocol;
var browserEntrypoint = (function (uri, opts) {
return new Socket(uri, opts);
});
return browserEntrypoint;
}));
//# sourceMappingURL=engine.io.js.map