| 1 | {"version":3,"file":"socket.io.msgpack.min.js","sources":["../node_modules/parseuri/index.js","../node_modules/has-cors/index.js","../node_modules/engine.io-client/build/esm/globalThis.browser.js","../node_modules/engine.io-client/build/esm/transports/xmlhttprequest.browser.js","../node_modules/engine.io-client/build/esm/util.js","../node_modules/@socket.io/component-emitter/index.js","../node_modules/engine.io-client/node_modules/engine.io-parser/build/esm/commons.js","../node_modules/engine.io-client/node_modules/base64-arraybuffer/dist/base64-arraybuffer.es5.js","../node_modules/engine.io-client/node_modules/engine.io-parser/build/esm/encodePacket.browser.js","../node_modules/yeast/index.js","../node_modules/engine.io-client/node_modules/engine.io-parser/build/esm/decodePacket.browser.js","../node_modules/engine.io-client/node_modules/engine.io-parser/build/esm/index.js","../node_modules/engine.io-client/build/esm/transport.js","../node_modules/parseqs/index.js","../node_modules/engine.io-client/build/esm/transports/polling.js","../node_modules/engine.io-client/build/esm/transports/polling-xhr.js","../node_modules/engine.io-client/build/esm/transports/websocket-constructor.browser.js","../node_modules/engine.io-client/build/esm/transports/websocket.js","../node_modules/engine.io-client/build/esm/transports/index.js","../node_modules/engine.io-client/build/esm/socket.js","../node_modules/notepack.io/browser/encode.js","../node_modules/notepack.io/browser/decode.js","../node_modules/notepack.io/lib/index.js","../node_modules/component-emitter/index.js","../node_modules/socket.io-msgpack-parser/index.js","../build/esm/on.js","../build/esm/socket.js","../node_modules/backo2/index.js","../build/esm/manager.js","../build/esm/index.js","../build/esm/url.js"],"sourcesContent":["/**\n * Parses an URI\n *\n * @author Steven Levithan <stevenlevithan.com> (MIT license)\n * @api private\n */\n\nvar re = /^(?:(?![^:@]+:[^:@\\/]*@)(http|https|ws|wss):\\/\\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:\\/?#]*)(?::(\\d*))?)(((\\/(?:[^?#](?![^?#\\/]*\\.[^?#\\/.]+(?:[?#]|$)))*\\/?)?([^?#\\/]*))(?:\\?([^#]*))?(?:#(.*))?)/;\n\nvar parts = [\n 'source', 'protocol', 'authority', 'userInfo', 'user', 'password', 'host', 'port', 'relative', 'path', 'directory', 'file', 'query', 'anchor'\n];\n\nmodule.exports = function parseuri(str) {\n var src = str,\n b = str.indexOf('['),\n e = str.indexOf(']');\n\n if (b != -1 && e != -1) {\n str = str.substring(0, b) + str.substring(b, e).replace(/:/g, ';') + str.substring(e, str.length);\n }\n\n var m = re.exec(str || ''),\n uri = {},\n i = 14;\n\n while (i--) {\n uri[parts[i]] = m[i] || '';\n }\n\n if (b != -1 && e != -1) {\n uri.source = src;\n uri.host = uri.host.substring(1, uri.host.length - 1).replace(/;/g, ':');\n uri.authority = uri.authority.replace('[', '').replace(']', '').replace(/;/g, ':');\n uri.ipv6uri = true;\n }\n\n uri.pathNames = pathNames(uri, uri['path']);\n uri.queryKey = queryKey(uri, uri['query']);\n\n return uri;\n};\n\nfunction pathNames(obj, path) {\n var regx = /\\/{2,9}/g,\n names = path.replace(regx, \"/\").split(\"/\");\n\n if (path.substr(0, 1) == '/' || path.length === 0) {\n names.splice(0, 1);\n }\n if (path.substr(path.length - 1, 1) == '/') {\n names.splice(names.length - 1, 1);\n }\n\n return names;\n}\n\nfunction queryKey(uri, query) {\n var data = {};\n\n query.replace(/(?:^|&)([^&=]*)=?([^&]*)/g, function ($0, $1, $2) {\n if ($1) {\n data[$1] = $2;\n }\n });\n\n return data;\n}\n","\n/**\n * Module exports.\n *\n * Logic borrowed from Modernizr:\n *\n * - https://github.com/Modernizr/Modernizr/blob/master/feature-detects/cors.js\n */\n\ntry {\n module.exports = typeof XMLHttpRequest !== 'undefined' &&\n 'withCredentials' in new XMLHttpRequest();\n} catch (err) {\n // if XMLHttp support is disabled in IE then it will throw\n // when trying to create\n module.exports = false;\n}\n","export default (() => {\n if (typeof self !== \"undefined\") {\n return self;\n }\n else if (typeof window !== \"undefined\") {\n return window;\n }\n else {\n return Function(\"return this\")();\n }\n})();\n","// browser shim for xmlhttprequest module\nimport hasCORS from \"has-cors\";\nimport globalThis from \"../globalThis.js\";\nexport default function (opts) {\n const xdomain = opts.xdomain;\n // XMLHttpRequest can be disabled on IE\n try {\n if (\"undefined\" !== typeof XMLHttpRequest && (!xdomain || hasCORS)) {\n return new XMLHttpRequest();\n }\n }\n catch (e) { }\n if (!xdomain) {\n try {\n return new globalThis[[\"Active\"].concat(\"Object\").join(\"X\")](\"Microsoft.XMLHTTP\");\n }\n catch (e) { }\n }\n}\n","import globalThis from \"./globalThis.js\";\nexport function pick(obj, ...attr) {\n return attr.reduce((acc, k) => {\n if (obj.hasOwnProperty(k)) {\n acc[k] = obj[k];\n }\n return acc;\n }, {});\n}\n// Keep a reference to the real timeout functions so they can be used when overridden\nconst NATIVE_SET_TIMEOUT = setTimeout;\nconst NATIVE_CLEAR_TIMEOUT = clearTimeout;\nexport function installTimerFunctions(obj, opts) {\n if (opts.useNativeTimers) {\n obj.setTimeoutFn = NATIVE_SET_TIMEOUT.bind(globalThis);\n obj.clearTimeoutFn = NATIVE_CLEAR_TIMEOUT.bind(globalThis);\n }\n else {\n obj.setTimeoutFn = setTimeout.bind(globalThis);\n obj.clearTimeoutFn = clearTimeout.bind(globalThis);\n }\n}\n","\n/**\n * Expose `Emitter`.\n */\n\nexports.Emitter = Emitter;\n\n/**\n * Initialize a new `Emitter`.\n *\n * @api public\n */\n\nfunction Emitter(obj) {\n if (obj) return mixin(obj);\n}\n\n/**\n * Mixin the emitter properties.\n *\n * @param {Object} obj\n * @return {Object}\n * @api private\n */\n\nfunction mixin(obj) {\n for (var key in Emitter.prototype) {\n obj[key] = Emitter.prototype[key];\n }\n return obj;\n}\n\n/**\n * Listen on the given `event` with `fn`.\n *\n * @param {String} event\n * @param {Function} fn\n * @return {Emitter}\n * @api public\n */\n\nEmitter.prototype.on =\nEmitter.prototype.addEventListener = function(event, fn){\n this._callbacks = this._callbacks || {};\n (this._callbacks['$' + event] = this._callbacks['$' + event] || [])\n .push(fn);\n return this;\n};\n\n/**\n * Adds an `event` listener that will be invoked a single\n * time then automatically removed.\n *\n * @param {String} event\n * @param {Function} fn\n * @return {Emitter}\n * @api public\n */\n\nEmitter.prototype.once = function(event, fn){\n function on() {\n this.off(event, on);\n fn.apply(this, arguments);\n }\n\n on.fn = fn;\n this.on(event, on);\n return this;\n};\n\n/**\n * Remove the given callback for `event` or all\n * registered callbacks.\n *\n * @param {String} event\n * @param {Function} fn\n * @return {Emitter}\n * @api public\n */\n\nEmitter.prototype.off =\nEmitter.prototype.removeListener =\nEmitter.prototype.removeAllListeners =\nEmitter.prototype.removeEventListener = function(event, fn){\n this._callbacks = this._callbacks || {};\n\n // all\n if (0 == arguments.length) {\n this._callbacks = {};\n return this;\n }\n\n // specific event\n var callbacks = this._callbacks['$' + event];\n if (!callbacks) return this;\n\n // remove all handlers\n if (1 == arguments.length) {\n delete this._callbacks['$' + event];\n return this;\n }\n\n // remove specific handler\n var cb;\n for (var i = 0; i < callbacks.length; i++) {\n cb = callbacks[i];\n if (cb === fn || cb.fn === fn) {\n callbacks.splice(i, 1);\n break;\n }\n }\n\n // Remove event specific arrays for event types that no\n // one is subscribed for to avoid memory leak.\n if (callbacks.length === 0) {\n delete this._callbacks['$' + event];\n }\n\n return this;\n};\n\n/**\n * Emit `event` with the given args.\n *\n * @param {String} event\n * @param {Mixed} ...\n * @return {Emitter}\n */\n\nEmitter.prototype.emit = function(event){\n this._callbacks = this._callbacks || {};\n\n var args = new Array(arguments.length - 1)\n , callbacks = this._callbacks['$' + event];\n\n for (var i = 1; i < arguments.length; i++) {\n args[i - 1] = arguments[i];\n }\n\n if (callbacks) {\n callbacks = callbacks.slice(0);\n for (var i = 0, len = callbacks.length; i < len; ++i) {\n callbacks[i].apply(this, args);\n }\n }\n\n return this;\n};\n\n// alias used for reserved events (protected method)\nEmitter.prototype.emitReserved = Emitter.prototype.emit;\n\n/**\n * Return array of callbacks for `event`.\n *\n * @param {String} event\n * @return {Array}\n * @api public\n */\n\nEmitter.prototype.listeners = function(event){\n this._callbacks = this._callbacks || {};\n return this._callbacks['$' + event] || [];\n};\n\n/**\n * Check if this emitter has `event` handlers.\n *\n * @param {String} event\n * @return {Boolean}\n * @api public\n */\n\nEmitter.prototype.hasListeners = function(event){\n return !! this.listeners(event).length;\n};\n","const PACKET_TYPES = Object.create(null); // no Map = no polyfill\nPACKET_TYPES[\"open\"] = \"0\";\nPACKET_TYPES[\"close\"] = \"1\";\nPACKET_TYPES[\"ping\"] = \"2\";\nPACKET_TYPES[\"pong\"] = \"3\";\nPACKET_TYPES[\"message\"] = \"4\";\nPACKET_TYPES[\"upgrade\"] = \"5\";\nPACKET_TYPES[\"noop\"] = \"6\";\nconst PACKET_TYPES_REVERSE = Object.create(null);\nObject.keys(PACKET_TYPES).forEach(key => {\n PACKET_TYPES_REVERSE[PACKET_TYPES[key]] = key;\n});\nconst ERROR_PACKET = { type: \"error\", data: \"parser error\" };\nexport { PACKET_TYPES, PACKET_TYPES_REVERSE, ERROR_PACKET };\n","/*\n * base64-arraybuffer 1.0.1 <https://github.com/niklasvh/base64-arraybuffer>\n * Copyright (c) 2021 Niklas von Hertzen <https://hertzen.com>\n * Released under MIT License\n */\nvar chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';\n// Use a lookup table to find the index.\nvar lookup = typeof Uint8Array === 'undefined' ? [] : new Uint8Array(256);\nfor (var i = 0; i < chars.length; i++) {\n lookup[chars.charCodeAt(i)] = i;\n}\nvar encode = function (arraybuffer) {\n var bytes = new Uint8Array(arraybuffer), i, len = bytes.length, base64 = '';\n for (i = 0; i < len; i += 3) {\n base64 += chars[bytes[i] >> 2];\n base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];\n base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];\n base64 += chars[bytes[i + 2] & 63];\n }\n if (len % 3 === 2) {\n base64 = base64.substring(0, base64.length - 1) + '=';\n }\n else if (len % 3 === 1) {\n base64 = base64.substring(0, base64.length - 2) + '==';\n }\n return base64;\n};\nvar decode = function (base64) {\n var bufferLength = base64.length * 0.75, len = base64.length, i, p = 0, encoded1, encoded2, encoded3, encoded4;\n if (base64[base64.length - 1] === '=') {\n bufferLength--;\n if (base64[base64.length - 2] === '=') {\n bufferLength--;\n }\n }\n var arraybuffer = new ArrayBuffer(bufferLength), bytes = new Uint8Array(arraybuffer);\n for (i = 0; i < len; i += 4) {\n encoded1 = lookup[base64.charCodeAt(i)];\n encoded2 = lookup[base64.charCodeAt(i + 1)];\n encoded3 = lookup[base64.charCodeAt(i + 2)];\n encoded4 = lookup[base64.charCodeAt(i + 3)];\n bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);\n bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);\n bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);\n }\n return arraybuffer;\n};\n\nexport { decode, encode };\n//# sourceMappingURL=base64-arraybuffer.es5.js.map\n","import { PACKET_TYPES } from \"./commons.js\";\nconst withNativeBlob = typeof Blob === \"function\" ||\n (typeof Blob !== \"undefined\" &&\n Object.prototype.toString.call(Blob) === \"[object BlobConstructor]\");\nconst withNativeArrayBuffer = typeof ArrayBuffer === \"function\";\n// ArrayBuffer.isView method is not defined in IE10\nconst isView = obj => {\n return typeof ArrayBuffer.isView === \"function\"\n ? ArrayBuffer.isView(obj)\n : obj && obj.buffer instanceof ArrayBuffer;\n};\nconst encodePacket = ({ type, data }, supportsBinary, callback) => {\n if (withNativeBlob && data instanceof Blob) {\n if (supportsBinary) {\n return callback(data);\n }\n else {\n return encodeBlobAsBase64(data, callback);\n }\n }\n else if (withNativeArrayBuffer &&\n (data instanceof ArrayBuffer || isView(data))) {\n if (supportsBinary) {\n return callback(data);\n }\n else {\n return encodeBlobAsBase64(new Blob([data]), callback);\n }\n }\n // plain string\n return callback(PACKET_TYPES[type] + (data || \"\"));\n};\nconst encodeBlobAsBase64 = (data, callback) => {\n const fileReader = new FileReader();\n fileReader.onload = function () {\n const content = fileReader.result.split(\",\")[1];\n callback(\"b\" + content);\n };\n return fileReader.readAsDataURL(data);\n};\nexport default encodePacket;\n","'use strict';\n\nvar alphabet = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_'.split('')\n , length = 64\n , map = {}\n , seed = 0\n , i = 0\n , prev;\n\n/**\n * Return a string representing the specified number.\n *\n * @param {Number} num The number to convert.\n * @returns {String} The string representation of the number.\n * @api public\n */\nfunction encode(num) {\n var encoded = '';\n\n do {\n encoded = alphabet[num % length] + encoded;\n num = Math.floor(num / length);\n } while (num > 0);\n\n return encoded;\n}\n\n/**\n * Return the integer value specified by the given string.\n *\n * @param {String} str The string to convert.\n * @returns {Number} The integer value represented by the string.\n * @api public\n */\nfunction decode(str) {\n var decoded = 0;\n\n for (i = 0; i < str.length; i++) {\n decoded = decoded * length + map[str.charAt(i)];\n }\n\n return decoded;\n}\n\n/**\n * Yeast: A tiny growing id generator.\n *\n * @returns {String} A unique id.\n * @api public\n */\nfunction yeast() {\n var now = encode(+new Date());\n\n if (now !== prev) return seed = 0, prev = now;\n return now +'.'+ encode(seed++);\n}\n\n//\n// Map each character to its index.\n//\nfor (; i < length; i++) map[alphabet[i]] = i;\n\n//\n// Expose the `yeast`, `encode` and `decode` functions.\n//\nyeast.encode = encode;\nyeast.decode = decode;\nmodule.exports = yeast;\n","import { ERROR_PACKET, PACKET_TYPES_REVERSE } from \"./commons.js\";\nimport { decode } from \"base64-arraybuffer\";\nconst withNativeArrayBuffer = typeof ArrayBuffer === \"function\";\nconst decodePacket = (encodedPacket, binaryType) => {\n if (typeof encodedPacket !== \"string\") {\n return {\n type: \"message\",\n data: mapBinary(encodedPacket, binaryType)\n };\n }\n const type = encodedPacket.charAt(0);\n if (type === \"b\") {\n return {\n type: \"message\",\n data: decodeBase64Packet(encodedPacket.substring(1), binaryType)\n };\n }\n const packetType = PACKET_TYPES_REVERSE[type];\n if (!packetType) {\n return ERROR_PACKET;\n }\n return encodedPacket.length > 1\n ? {\n type: PACKET_TYPES_REVERSE[type],\n data: encodedPacket.substring(1)\n }\n : {\n type: PACKET_TYPES_REVERSE[type]\n };\n};\nconst decodeBase64Packet = (data, binaryType) => {\n if (withNativeArrayBuffer) {\n const decoded = decode(data);\n return mapBinary(decoded, binaryType);\n }\n else {\n return { base64: true, data }; // fallback for old browsers\n }\n};\nconst mapBinary = (data, binaryType) => {\n switch (binaryType) {\n case \"blob\":\n return data instanceof ArrayBuffer ? new Blob([data]) : data;\n case \"arraybuffer\":\n default:\n return data; // assuming the data is already an ArrayBuffer\n }\n};\nexport default decodePacket;\n","import encodePacket from \"./encodePacket.js\";\nimport decodePacket from \"./decodePacket.js\";\nconst SEPARATOR = String.fromCharCode(30); // see https://en.wikipedia.org/wiki/Delimiter#ASCII_delimited_text\nconst encodePayload = (packets, callback) => {\n // some packets may be added to the array while encoding, so the initial length must be saved\n const length = packets.length;\n const encodedPackets = new Array(length);\n let count = 0;\n packets.forEach((packet, i) => {\n // force base64 encoding for binary packets\n encodePacket(packet, false, encodedPacket => {\n encodedPackets[i] = encodedPacket;\n if (++count === length) {\n callback(encodedPackets.join(SEPARATOR));\n }\n });\n });\n};\nconst decodePayload = (encodedPayload, binaryType) => {\n const encodedPackets = encodedPayload.split(SEPARATOR);\n const packets = [];\n for (let i = 0; i < encodedPackets.length; i++) {\n const decodedPacket = decodePacket(encodedPackets[i], binaryType);\n packets.push(decodedPacket);\n if (decodedPacket.type === \"error\") {\n break;\n }\n }\n return packets;\n};\nexport const protocol = 4;\nexport { encodePacket, encodePayload, decodePacket, decodePayload };\n","import { decodePacket } from \"engine.io-parser\";\nimport { Emitter } from \"@socket.io/component-emitter\";\nimport { installTimerFunctions } from \"./util.js\";\nexport class Transport extends Emitter {\n /**\n * Transport abstract constructor.\n *\n * @param {Object} options.\n * @api private\n */\n constructor(opts) {\n super();\n this.writable = false;\n installTimerFunctions(this, opts);\n this.opts = opts;\n this.query = opts.query;\n this.readyState = \"\";\n this.socket = opts.socket;\n }\n /**\n * Emits an error.\n *\n * @param {String} str\n * @return {Transport} for chaining\n * @api protected\n */\n onError(msg, desc) {\n const err = new Error(msg);\n // @ts-ignore\n err.type = \"TransportError\";\n // @ts-ignore\n err.description = desc;\n super.emit(\"error\", err);\n return this;\n }\n /**\n * Opens the transport.\n *\n * @api public\n */\n open() {\n if (\"closed\" === this.readyState || \"\" === this.readyState) {\n this.readyState = \"opening\";\n this.doOpen();\n }\n return this;\n }\n /**\n * Closes the transport.\n *\n * @api public\n */\n close() {\n if (\"opening\" === this.readyState || \"open\" === this.readyState) {\n this.doClose();\n this.onClose();\n }\n return this;\n }\n /**\n * Sends multiple packets.\n *\n * @param {Array} packets\n * @api public\n */\n send(packets) {\n if (\"open\" === this.readyState) {\n this.write(packets);\n }\n else {\n // this might happen if the transport was silently closed in the beforeunload event handler\n }\n }\n /**\n * Called upon open\n *\n * @api protected\n */\n onOpen() {\n this.readyState = \"open\";\n this.writable = true;\n super.emit(\"open\");\n }\n /**\n * Called with data.\n *\n * @param {String} data\n * @api protected\n */\n onData(data) {\n const packet = decodePacket(data, this.socket.binaryType);\n this.onPacket(packet);\n }\n /**\n * Called with a decoded packet.\n *\n * @api protected\n */\n onPacket(packet) {\n super.emit(\"packet\", packet);\n }\n /**\n * Called upon close.\n *\n * @api protected\n */\n onClose() {\n this.readyState = \"closed\";\n super.emit(\"close\");\n }\n}\n","/**\n * Compiles a querystring\n * Returns string representation of the object\n *\n * @param {Object}\n * @api private\n */\n\nexports.encode = function (obj) {\n var str = '';\n\n for (var i in obj) {\n if (obj.hasOwnProperty(i)) {\n if (str.length) str += '&';\n str += encodeURIComponent(i) + '=' + encodeURIComponent(obj[i]);\n }\n }\n\n return str;\n};\n\n/**\n * Parses a simple querystring into an object\n *\n * @param {String} qs\n * @api private\n */\n\nexports.decode = function(qs){\n var qry = {};\n var pairs = qs.split('&');\n for (var i = 0, l = pairs.length; i < l; i++) {\n var pair = pairs[i].split('=');\n qry[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1]);\n }\n return qry;\n};\n","import { Transport } from \"../transport.js\";\nimport yeast from \"yeast\";\nimport parseqs from \"parseqs\";\nimport { encodePayload, decodePayload } from \"engine.io-parser\";\nexport class Polling extends Transport {\n constructor() {\n super(...arguments);\n this.polling = false;\n }\n /**\n * Transport name.\n */\n get name() {\n return \"polling\";\n }\n /**\n * Opens the socket (triggers polling). We write a PING message to determine\n * when the transport is open.\n *\n * @api private\n */\n doOpen() {\n this.poll();\n }\n /**\n * Pauses polling.\n *\n * @param {Function} callback upon buffers are flushed and transport is paused\n * @api private\n */\n pause(onPause) {\n this.readyState = \"pausing\";\n const pause = () => {\n this.readyState = \"paused\";\n onPause();\n };\n if (this.polling || !this.writable) {\n let total = 0;\n if (this.polling) {\n total++;\n this.once(\"pollComplete\", function () {\n --total || pause();\n });\n }\n if (!this.writable) {\n total++;\n this.once(\"drain\", function () {\n --total || pause();\n });\n }\n }\n else {\n pause();\n }\n }\n /**\n * Starts polling cycle.\n *\n * @api public\n */\n poll() {\n this.polling = true;\n this.doPoll();\n this.emit(\"poll\");\n }\n /**\n * Overloads onData to detect payloads.\n *\n * @api private\n */\n onData(data) {\n const callback = packet => {\n // if its the first message we consider the transport open\n if (\"opening\" === this.readyState && packet.type === \"open\") {\n this.onOpen();\n }\n // if its a close packet, we close the ongoing requests\n if (\"close\" === packet.type) {\n this.onClose();\n return false;\n }\n // otherwise bypass onData and handle the message\n this.onPacket(packet);\n };\n // decode payload\n decodePayload(data, this.socket.binaryType).forEach(callback);\n // if an event did not trigger closing\n if (\"closed\" !== this.readyState) {\n // if we got data we're not polling\n this.polling = false;\n this.emit(\"pollComplete\");\n if (\"open\" === this.readyState) {\n this.poll();\n }\n else {\n }\n }\n }\n /**\n * For polling, send a close packet.\n *\n * @api private\n */\n doClose() {\n const close = () => {\n this.write([{ type: \"close\" }]);\n };\n if (\"open\" === this.readyState) {\n close();\n }\n else {\n // in case we're trying to close while\n // handshaking is in progress (GH-164)\n this.once(\"open\", close);\n }\n }\n /**\n * Writes a packets payload.\n *\n * @param {Array} data packets\n * @param {Function} drain callback\n * @api private\n */\n write(packets) {\n this.writable = false;\n encodePayload(packets, data => {\n this.doWrite(data, () => {\n this.writable = true;\n this.emit(\"drain\");\n });\n });\n }\n /**\n * Generates uri for connection.\n *\n * @api private\n */\n uri() {\n let query = this.query || {};\n const schema = this.opts.secure ? \"https\" : \"http\";\n let port = \"\";\n // cache busting is forced\n if (false !== this.opts.timestampRequests) {\n query[this.opts.timestampParam] = yeast();\n }\n if (!this.supportsBinary && !query.sid) {\n query.b64 = 1;\n }\n // avoid port if default for schema\n if (this.opts.port &&\n ((\"https\" === schema && Number(this.opts.port) !== 443) ||\n (\"http\" === schema && Number(this.opts.port) !== 80))) {\n port = \":\" + this.opts.port;\n }\n const encodedQuery = parseqs.encode(query);\n const ipv6 = this.opts.hostname.indexOf(\":\") !== -1;\n return (schema +\n \"://\" +\n (ipv6 ? \"[\" + this.opts.hostname + \"]\" : this.opts.hostname) +\n port +\n this.opts.path +\n (encodedQuery.length ? \"?\" + encodedQuery : \"\"));\n }\n}\n","/* global attachEvent */\nimport XMLHttpRequest from \"./xmlhttprequest.js\";\nimport globalThis from \"../globalThis.js\";\nimport { installTimerFunctions, pick } from \"../util.js\";\nimport { Emitter } from \"@socket.io/component-emitter\";\nimport { Polling } from \"./polling.js\";\n/**\n * Empty function\n */\nfunction empty() { }\nconst hasXHR2 = (function () {\n const xhr = new XMLHttpRequest({\n xdomain: false\n });\n return null != xhr.responseType;\n})();\nexport class XHR extends Polling {\n /**\n * XHR Polling constructor.\n *\n * @param {Object} opts\n * @api public\n */\n constructor(opts) {\n super(opts);\n if (typeof location !== \"undefined\") {\n const isSSL = \"https:\" === location.protocol;\n let port = location.port;\n // some user agents have empty `location.port`\n if (!port) {\n port = isSSL ? \"443\" : \"80\";\n }\n this.xd =\n (typeof location !== \"undefined\" &&\n opts.hostname !== location.hostname) ||\n port !== opts.port;\n this.xs = opts.secure !== isSSL;\n }\n /**\n * XHR supports binary\n */\n const forceBase64 = opts && opts.forceBase64;\n this.supportsBinary = hasXHR2 && !forceBase64;\n }\n /**\n * Creates a request.\n *\n * @param {String} method\n * @api private\n */\n request(opts = {}) {\n Object.assign(opts, { xd: this.xd, xs: this.xs }, this.opts);\n return new Request(this.uri(), opts);\n }\n /**\n * Sends data.\n *\n * @param {String} data to send.\n * @param {Function} called upon flush.\n * @api private\n */\n doWrite(data, fn) {\n const req = this.request({\n method: \"POST\",\n data: data\n });\n req.on(\"success\", fn);\n req.on(\"error\", err => {\n this.onError(\"xhr post error\", err);\n });\n }\n /**\n * Starts a poll cycle.\n *\n * @api private\n */\n doPoll() {\n const req = this.request();\n req.on(\"data\", this.onData.bind(this));\n req.on(\"error\", err => {\n this.onError(\"xhr poll error\", err);\n });\n this.pollXhr = req;\n }\n}\nexport class Request extends Emitter {\n /**\n * Request constructor\n *\n * @param {Object} options\n * @api public\n */\n constructor(uri, opts) {\n super();\n installTimerFunctions(this, opts);\n this.opts = opts;\n this.method = opts.method || \"GET\";\n this.uri = uri;\n this.async = false !== opts.async;\n this.data = undefined !== opts.data ? opts.data : null;\n this.create();\n }\n /**\n * Creates the XHR object and sends the request.\n *\n * @api private\n */\n create() {\n const opts = pick(this.opts, \"agent\", \"pfx\", \"key\", \"passphrase\", \"cert\", \"ca\", \"ciphers\", \"rejectUnauthorized\", \"autoUnref\");\n opts.xdomain = !!this.opts.xd;\n opts.xscheme = !!this.opts.xs;\n const xhr = (this.xhr = new XMLHttpRequest(opts));\n try {\n xhr.open(this.method, this.uri, this.async);\n try {\n if (this.opts.extraHeaders) {\n xhr.setDisableHeaderCheck && xhr.setDisableHeaderCheck(true);\n for (let i in this.opts.extraHeaders) {\n if (this.opts.extraHeaders.hasOwnProperty(i)) {\n xhr.setRequestHeader(i, this.opts.extraHeaders[i]);\n }\n }\n }\n }\n catch (e) { }\n if (\"POST\" === this.method) {\n try {\n xhr.setRequestHeader(\"Content-type\", \"text/plain;charset=UTF-8\");\n }\n catch (e) { }\n }\n try {\n xhr.setRequestHeader(\"Accept\", \"*/*\");\n }\n catch (e) { }\n // ie6 check\n if (\"withCredentials\" in xhr) {\n xhr.withCredentials = this.opts.withCredentials;\n }\n if (this.opts.requestTimeout) {\n xhr.timeout = this.opts.requestTimeout;\n }\n xhr.onreadystatechange = () => {\n if (4 !== xhr.readyState)\n return;\n if (200 === xhr.status || 1223 === xhr.status) {\n this.onLoad();\n }\n else {\n // make sure the `error` event handler that's user-set\n // does not throw in the same tick and gets caught here\n this.setTimeoutFn(() => {\n this.onError(typeof xhr.status === \"number\" ? xhr.status : 0);\n }, 0);\n }\n };\n xhr.send(this.data);\n }\n catch (e) {\n // Need to defer since .create() is called directly from the constructor\n // and thus the 'error' event can only be only bound *after* this exception\n // occurs. Therefore, also, we cannot throw here at all.\n this.setTimeoutFn(() => {\n this.onError(e);\n }, 0);\n return;\n }\n if (typeof document !== \"undefined\") {\n this.index = Request.requestsCount++;\n Request.requests[this.index] = this;\n }\n }\n /**\n * Called upon successful response.\n *\n * @api private\n */\n onSuccess() {\n this.emit(\"success\");\n this.cleanup();\n }\n /**\n * Called if we have data.\n *\n * @api private\n */\n onData(data) {\n this.emit(\"data\", data);\n this.onSuccess();\n }\n /**\n * Called upon error.\n *\n * @api private\n */\n onError(err) {\n this.emit(\"error\", err);\n this.cleanup(true);\n }\n /**\n * Cleans up house.\n *\n * @api private\n */\n cleanup(fromError) {\n if (\"undefined\" === typeof this.xhr || null === this.xhr) {\n return;\n }\n this.xhr.onreadystatechange = empty;\n if (fromError) {\n try {\n this.xhr.abort();\n }\n catch (e) { }\n }\n if (typeof document !== \"undefined\") {\n delete Request.requests[this.index];\n }\n this.xhr = null;\n }\n /**\n * Called upon load.\n *\n * @api private\n */\n onLoad() {\n const data = this.xhr.responseText;\n if (data !== null) {\n this.onData(data);\n }\n }\n /**\n * Aborts the request.\n *\n * @api public\n */\n abort() {\n this.cleanup();\n }\n}\nRequest.requestsCount = 0;\nRequest.requests = {};\n/**\n * Aborts pending requests when unloading the window. This is needed to prevent\n * memory leaks (e.g. when using IE) and to ensure that no spurious error is\n * emitted.\n */\nif (typeof document !== \"undefined\") {\n // @ts-ignore\n if (typeof attachEvent === \"function\") {\n // @ts-ignore\n attachEvent(\"onunload\", unloadHandler);\n }\n else if (typeof addEventListener === \"function\") {\n const terminationEvent = \"onpagehide\" in globalThis ? \"pagehide\" : \"unload\";\n addEventListener(terminationEvent, unloadHandler, false);\n }\n}\nfunction unloadHandler() {\n for (let i in Request.requests) {\n if (Request.requests.hasOwnProperty(i)) {\n Request.requests[i].abort();\n }\n }\n}\n","import globalThis from \"../globalThis.js\";\nexport const nextTick = (() => {\n const isPromiseAvailable = typeof Promise === \"function\" && typeof Promise.resolve === \"function\";\n if (isPromiseAvailable) {\n return cb => Promise.resolve().then(cb);\n }\n else {\n return (cb, setTimeoutFn) => setTimeoutFn(cb, 0);\n }\n})();\nexport const WebSocket = globalThis.WebSocket || globalThis.MozWebSocket;\nexport const usingBrowserWebSocket = true;\nexport const defaultBinaryType = \"arraybuffer\";\n","import { Transport } from \"../transport.js\";\nimport parseqs from \"parseqs\";\nimport yeast from \"yeast\";\nimport { pick } from \"../util.js\";\nimport { defaultBinaryType, nextTick, usingBrowserWebSocket, WebSocket } from \"./websocket-constructor.js\";\nimport { encodePacket } from \"engine.io-parser\";\n// detect ReactNative environment\nconst isReactNative = typeof navigator !== \"undefined\" &&\n typeof navigator.product === \"string\" &&\n navigator.product.toLowerCase() === \"reactnative\";\nexport class WS extends Transport {\n /**\n * WebSocket transport constructor.\n *\n * @api {Object} connection options\n * @api public\n */\n constructor(opts) {\n super(opts);\n this.supportsBinary = !opts.forceBase64;\n }\n /**\n * Transport name.\n *\n * @api public\n */\n get name() {\n return \"websocket\";\n }\n /**\n * Opens socket.\n *\n * @api private\n */\n doOpen() {\n if (!this.check()) {\n // let probe timeout\n return;\n }\n const uri = this.uri();\n const protocols = this.opts.protocols;\n // React Native only supports the 'headers' option, and will print a warning if anything else is passed\n const opts = isReactNative\n ? {}\n : pick(this.opts, \"agent\", \"perMessageDeflate\", \"pfx\", \"key\", \"passphrase\", \"cert\", \"ca\", \"ciphers\", \"rejectUnauthorized\", \"localAddress\", \"protocolVersion\", \"origin\", \"maxPayload\", \"family\", \"checkServerIdentity\");\n if (this.opts.extraHeaders) {\n opts.headers = this.opts.extraHeaders;\n }\n try {\n this.ws =\n usingBrowserWebSocket && !isReactNative\n ? protocols\n ? new WebSocket(uri, protocols)\n : new WebSocket(uri)\n : new WebSocket(uri, protocols, opts);\n }\n catch (err) {\n return this.emit(\"error\", err);\n }\n this.ws.binaryType = this.socket.binaryType || defaultBinaryType;\n this.addEventListeners();\n }\n /**\n * Adds event listeners to the socket\n *\n * @api private\n */\n addEventListeners() {\n this.ws.onopen = () => {\n if (this.opts.autoUnref) {\n this.ws._socket.unref();\n }\n this.onOpen();\n };\n this.ws.onclose = this.onClose.bind(this);\n this.ws.onmessage = ev => this.onData(ev.data);\n this.ws.onerror = e => this.onError(\"websocket error\", e);\n }\n /**\n * Writes data to socket.\n *\n * @param {Array} array of packets.\n * @api private\n */\n write(packets) {\n this.writable = false;\n // encodePacket efficient as it uses WS framing\n // no need for encodePayload\n for (let i = 0; i < packets.length; i++) {\n const packet = packets[i];\n const lastPacket = i === packets.length - 1;\n encodePacket(packet, this.supportsBinary, data => {\n // always create a new object (GH-437)\n const opts = {};\n if (!usingBrowserWebSocket) {\n if (packet.options) {\n opts.compress = packet.options.compress;\n }\n if (this.opts.perMessageDeflate) {\n const len = \"string\" === typeof data ? Buffer.byteLength(data) : data.length;\n if (len < this.opts.perMessageDeflate.threshold) {\n opts.compress = false;\n }\n }\n }\n // Sometimes the websocket has already been closed but the browser didn't\n // have a chance of informing us about it yet, in that case send will\n // throw an error\n try {\n if (usingBrowserWebSocket) {\n // TypeError is thrown when passing the second argument on Safari\n this.ws.send(data);\n }\n else {\n this.ws.send(data, opts);\n }\n }\n catch (e) {\n }\n if (lastPacket) {\n // fake drain\n // defer to next tick to allow Socket to clear writeBuffer\n nextTick(() => {\n this.writable = true;\n this.emit(\"drain\");\n }, this.setTimeoutFn);\n }\n });\n }\n }\n /**\n * Closes socket.\n *\n * @api private\n */\n doClose() {\n if (typeof this.ws !== \"undefined\") {\n this.ws.close();\n this.ws = null;\n }\n }\n /**\n * Generates uri for connection.\n *\n * @api private\n */\n uri() {\n let query = this.query || {};\n const schema = this.opts.secure ? \"wss\" : \"ws\";\n let port = \"\";\n // avoid port if default for schema\n if (this.opts.port &&\n ((\"wss\" === schema && Number(this.opts.port) !== 443) ||\n (\"ws\" === schema && Number(this.opts.port) !== 80))) {\n port = \":\" + this.opts.port;\n }\n // append timestamp to URI\n if (this.opts.timestampRequests) {\n query[this.opts.timestampParam] = yeast();\n }\n // communicate binary support capabilities\n if (!this.supportsBinary) {\n query.b64 = 1;\n }\n const encodedQuery = parseqs.encode(query);\n const ipv6 = this.opts.hostname.indexOf(\":\") !== -1;\n return (schema +\n \"://\" +\n (ipv6 ? \"[\" + this.opts.hostname + \"]\" : this.opts.hostname) +\n port +\n this.opts.path +\n (encodedQuery.length ? \"?\" + encodedQuery : \"\"));\n }\n /**\n * Feature detection for WebSocket.\n *\n * @return {Boolean} whether this transport is available.\n * @api public\n */\n check() {\n return (!!WebSocket &&\n !(\"__initialize\" in WebSocket && this.name === WS.prototype.name));\n }\n}\n","import { XHR } from \"./polling-xhr.js\";\nimport { WS } from \"./websocket.js\";\nexport const transports = {\n websocket: WS,\n polling: XHR\n};\n","import { transports } from \"./transports/index.js\";\nimport { installTimerFunctions } from \"./util.js\";\nimport parseqs from \"parseqs\";\nimport parseuri from \"parseuri\";\nimport { Emitter } from \"@socket.io/component-emitter\";\nimport { protocol } from \"engine.io-parser\";\nexport class Socket extends Emitter {\n /**\n * Socket constructor.\n *\n * @param {String|Object} uri or options\n * @param {Object} opts - options\n * @api public\n */\n constructor(uri, opts = {}) {\n super();\n if (uri && \"object\" === typeof uri) {\n opts = uri;\n uri = null;\n }\n if (uri) {\n uri = parseuri(uri);\n opts.hostname = uri.host;\n opts.secure = uri.protocol === \"https\" || uri.protocol === \"wss\";\n opts.port = uri.port;\n if (uri.query)\n opts.query = uri.query;\n }\n else if (opts.host) {\n opts.hostname = parseuri(opts.host).host;\n }\n installTimerFunctions(this, opts);\n this.secure =\n null != opts.secure\n ? opts.secure\n : typeof location !== \"undefined\" && \"https:\" === location.protocol;\n if (opts.hostname && !opts.port) {\n // if no port is specified manually, use the protocol default\n opts.port = this.secure ? \"443\" : \"80\";\n }\n this.hostname =\n opts.hostname ||\n (typeof location !== \"undefined\" ? location.hostname : \"localhost\");\n this.port =\n opts.port ||\n (typeof location !== \"undefined\" && location.port\n ? location.port\n : this.secure\n ? \"443\"\n : \"80\");\n this.transports = opts.transports || [\"polling\", \"websocket\"];\n this.readyState = \"\";\n this.writeBuffer = [];\n this.prevBufferLen = 0;\n this.opts = Object.assign({\n path: \"/engine.io\",\n agent: false,\n withCredentials: false,\n upgrade: true,\n timestampParam: \"t\",\n rememberUpgrade: false,\n rejectUnauthorized: true,\n perMessageDeflate: {\n threshold: 1024\n },\n transportOptions: {},\n closeOnBeforeunload: true\n }, opts);\n this.opts.path = this.opts.path.replace(/\\/$/, \"\") + \"/\";\n if (typeof this.opts.query === \"string\") {\n this.opts.query = parseqs.decode(this.opts.query);\n }\n // set on handshake\n this.id = null;\n this.upgrades = null;\n this.pingInterval = null;\n this.pingTimeout = null;\n // set on heartbeat\n this.pingTimeoutTimer = null;\n if (typeof addEventListener === \"function\") {\n if (this.opts.closeOnBeforeunload) {\n // Firefox closes the connection when the \"beforeunload\" event is emitted but not Chrome. This event listener\n // ensures every browser behaves the same (no \"disconnect\" event at the Socket.IO level when the page is\n // closed/reloaded)\n addEventListener(\"beforeunload\", () => {\n if (this.transport) {\n // silently close the transport\n this.transport.removeAllListeners();\n this.transport.close();\n }\n }, false);\n }\n if (this.hostname !== \"localhost\") {\n this.offlineEventListener = () => {\n this.onClose(\"transport close\");\n };\n addEventListener(\"offline\", this.offlineEventListener, false);\n }\n }\n this.open();\n }\n /**\n * Creates transport of the given type.\n *\n * @param {String} transport name\n * @return {Transport}\n * @api private\n */\n createTransport(name) {\n const query = clone(this.opts.query);\n // append engine.io protocol identifier\n query.EIO = protocol;\n // transport name\n query.transport = name;\n // session id if we already have one\n if (this.id)\n query.sid = this.id;\n const opts = Object.assign({}, this.opts.transportOptions[name], this.opts, {\n query,\n socket: this,\n hostname: this.hostname,\n secure: this.secure,\n port: this.port\n });\n return new transports[name](opts);\n }\n /**\n * Initializes transport to use and starts probe.\n *\n * @api private\n */\n open() {\n let transport;\n if (this.opts.rememberUpgrade &&\n Socket.priorWebsocketSuccess &&\n this.transports.indexOf(\"websocket\") !== -1) {\n transport = \"websocket\";\n }\n else if (0 === this.transports.length) {\n // Emit error on next tick so it can be listened to\n this.setTimeoutFn(() => {\n this.emitReserved(\"error\", \"No transports available\");\n }, 0);\n return;\n }\n else {\n transport = this.transports[0];\n }\n this.readyState = \"opening\";\n // Retry with the next transport if the transport is disabled (jsonp: false)\n try {\n transport = this.createTransport(transport);\n }\n catch (e) {\n this.transports.shift();\n this.open();\n return;\n }\n transport.open();\n this.setTransport(transport);\n }\n /**\n * Sets the current transport. Disables the existing one (if any).\n *\n * @api private\n */\n setTransport(transport) {\n if (this.transport) {\n this.transport.removeAllListeners();\n }\n // set up transport\n this.transport = transport;\n // set up transport listeners\n transport\n .on(\"drain\", this.onDrain.bind(this))\n .on(\"packet\", this.onPacket.bind(this))\n .on(\"error\", this.onError.bind(this))\n .on(\"close\", () => {\n this.onClose(\"transport close\");\n });\n }\n /**\n * Probes a transport.\n *\n * @param {String} transport name\n * @api private\n */\n probe(name) {\n let transport = this.createTransport(name);\n let failed = false;\n Socket.priorWebsocketSuccess = false;\n const onTransportOpen = () => {\n if (failed)\n return;\n transport.send([{ type: \"ping\", data: \"probe\" }]);\n transport.once(\"packet\", msg => {\n if (failed)\n return;\n if (\"pong\" === msg.type && \"probe\" === msg.data) {\n this.upgrading = true;\n this.emitReserved(\"upgrading\", transport);\n if (!transport)\n return;\n Socket.priorWebsocketSuccess = \"websocket\" === transport.name;\n this.transport.pause(() => {\n if (failed)\n return;\n if (\"closed\" === this.readyState)\n return;\n cleanup();\n this.setTransport(transport);\n transport.send([{ type: \"upgrade\" }]);\n this.emitReserved(\"upgrade\", transport);\n transport = null;\n this.upgrading = false;\n this.flush();\n });\n }\n else {\n const err = new Error(\"probe error\");\n // @ts-ignore\n err.transport = transport.name;\n this.emitReserved(\"upgradeError\", err);\n }\n });\n };\n function freezeTransport() {\n if (failed)\n return;\n // Any callback called by transport should be ignored since now\n failed = true;\n cleanup();\n transport.close();\n transport = null;\n }\n // Handle any error that happens while probing\n const onerror = err => {\n const error = new Error(\"probe error: \" + err);\n // @ts-ignore\n error.transport = transport.name;\n freezeTransport();\n this.emitReserved(\"upgradeError\", error);\n };\n function onTransportClose() {\n onerror(\"transport closed\");\n }\n // When the socket is closed while we're probing\n function onclose() {\n onerror(\"socket closed\");\n }\n // When the socket is upgraded while we're probing\n function onupgrade(to) {\n if (transport && to.name !== transport.name) {\n freezeTransport();\n }\n }\n // Remove all listeners on the transport and on self\n const cleanup = () => {\n transport.removeListener(\"open\", onTransportOpen);\n transport.removeListener(\"error\", onerror);\n transport.removeListener(\"close\", onTransportClose);\n this.off(\"close\", onclose);\n this.off(\"upgrading\", onupgrade);\n };\n transport.once(\"open\", onTransportOpen);\n transport.once(\"error\", onerror);\n transport.once(\"close\", onTransportClose);\n this.once(\"close\", onclose);\n this.once(\"upgrading\", onupgrade);\n transport.open();\n }\n /**\n * Called when connection is deemed open.\n *\n * @api private\n */\n onOpen() {\n this.readyState = \"open\";\n Socket.priorWebsocketSuccess = \"websocket\" === this.transport.name;\n this.emitReserved(\"open\");\n this.flush();\n // we check for `readyState` in case an `open`\n // listener already closed the socket\n if (\"open\" === this.readyState &&\n this.opts.upgrade &&\n this.transport.pause) {\n let i = 0;\n const l = this.upgrades.length;\n for (; i < l; i++) {\n this.probe(this.upgrades[i]);\n }\n }\n }\n /**\n * Handles a packet.\n *\n * @api private\n */\n onPacket(packet) {\n if (\"opening\" === this.readyState ||\n \"open\" === this.readyState ||\n \"closing\" === this.readyState) {\n this.emitReserved(\"packet\", packet);\n // Socket is live - any packet counts\n this.emitReserved(\"heartbeat\");\n switch (packet.type) {\n case \"open\":\n this.onHandshake(JSON.parse(packet.data));\n break;\n case \"ping\":\n this.resetPingTimeout();\n this.sendPacket(\"pong\");\n this.emitReserved(\"ping\");\n this.emitReserved(\"pong\");\n break;\n case \"error\":\n const err = new Error(\"server error\");\n // @ts-ignore\n err.code = packet.data;\n this.onError(err);\n break;\n case \"message\":\n this.emitReserved(\"data\", packet.data);\n this.emitReserved(\"message\", packet.data);\n break;\n }\n }\n else {\n }\n }\n /**\n * Called upon handshake completion.\n *\n * @param {Object} data - handshake obj\n * @api private\n */\n onHandshake(data) {\n this.emitReserved(\"handshake\", data);\n this.id = data.sid;\n this.transport.query.sid = data.sid;\n this.upgrades = this.filterUpgrades(data.upgrades);\n this.pingInterval = data.pingInterval;\n this.pingTimeout = data.pingTimeout;\n this.onOpen();\n // In case open handler closes socket\n if (\"closed\" === this.readyState)\n return;\n this.resetPingTimeout();\n }\n /**\n * Sets and resets ping timeout timer based on server pings.\n *\n * @api private\n */\n resetPingTimeout() {\n this.clearTimeoutFn(this.pingTimeoutTimer);\n this.pingTimeoutTimer = this.setTimeoutFn(() => {\n this.onClose(\"ping timeout\");\n }, this.pingInterval + this.pingTimeout);\n if (this.opts.autoUnref) {\n this.pingTimeoutTimer.unref();\n }\n }\n /**\n * Called on `drain` event\n *\n * @api private\n */\n onDrain() {\n this.writeBuffer.splice(0, this.prevBufferLen);\n // setting prevBufferLen = 0 is very important\n // for example, when upgrading, upgrade packet is sent over,\n // and a nonzero prevBufferLen could cause problems on `drain`\n this.prevBufferLen = 0;\n if (0 === this.writeBuffer.length) {\n this.emitReserved(\"drain\");\n }\n else {\n this.flush();\n }\n }\n /**\n * Flush write buffers.\n *\n * @api private\n */\n flush() {\n if (\"closed\" !== this.readyState &&\n this.transport.writable &&\n !this.upgrading &&\n this.writeBuffer.length) {\n this.transport.send(this.writeBuffer);\n // keep track of current length of writeBuffer\n // splice writeBuffer and callbackBuffer on `drain`\n this.prevBufferLen = this.writeBuffer.length;\n this.emitReserved(\"flush\");\n }\n }\n /**\n * Sends a message.\n *\n * @param {String} message.\n * @param {Function} callback function.\n * @param {Object} options.\n * @return {Socket} for chaining.\n * @api public\n */\n write(msg, options, fn) {\n this.sendPacket(\"message\", msg, options, fn);\n return this;\n }\n send(msg, options, fn) {\n this.sendPacket(\"message\", msg, options, fn);\n return this;\n }\n /**\n * Sends a packet.\n *\n * @param {String} packet type.\n * @param {String} data.\n * @param {Object} options.\n * @param {Function} callback function.\n * @api private\n */\n sendPacket(type, data, options, fn) {\n if (\"function\" === typeof data) {\n fn = data;\n data = undefined;\n }\n if (\"function\" === typeof options) {\n fn = options;\n options = null;\n }\n if (\"closing\" === this.readyState || \"closed\" === this.readyState) {\n return;\n }\n options = options || {};\n options.compress = false !== options.compress;\n const packet = {\n type: type,\n data: data,\n options: options\n };\n this.emitReserved(\"packetCreate\", packet);\n this.writeBuffer.push(packet);\n if (fn)\n this.once(\"flush\", fn);\n this.flush();\n }\n /**\n * Closes the connection.\n *\n * @api public\n */\n close() {\n const close = () => {\n this.onClose(\"forced close\");\n this.transport.close();\n };\n const cleanupAndClose = () => {\n this.off(\"upgrade\", cleanupAndClose);\n this.off(\"upgradeError\", cleanupAndClose);\n close();\n };\n const waitForUpgrade = () => {\n // wait for upgrade to finish since we can't send packets while pausing a transport\n this.once(\"upgrade\", cleanupAndClose);\n this.once(\"upgradeError\", cleanupAndClose);\n };\n if (\"opening\" === this.readyState || \"open\" === this.readyState) {\n this.readyState = \"closing\";\n if (this.writeBuffer.length) {\n this.once(\"drain\", () => {\n if (this.upgrading) {\n waitForUpgrade();\n }\n else {\n close();\n }\n });\n }\n else if (this.upgrading) {\n waitForUpgrade();\n }\n else {\n close();\n }\n }\n return this;\n }\n /**\n * Called upon transport error\n *\n * @api private\n */\n onError(err) {\n Socket.priorWebsocketSuccess = false;\n this.emitReserved(\"error\", err);\n this.onClose(\"transport error\", err);\n }\n /**\n * Called upon transport close.\n *\n * @api private\n */\n onClose(reason, desc) {\n if (\"opening\" === this.readyState ||\n \"open\" === this.readyState ||\n \"closing\" === this.readyState) {\n // clear timers\n this.clearTimeoutFn(this.pingTimeoutTimer);\n // stop event from firing again for transport\n this.transport.removeAllListeners(\"close\");\n // ensure transport won't stay open\n this.transport.close();\n // ignore further transport communication\n this.transport.removeAllListeners();\n if (typeof removeEventListener === \"function\") {\n removeEventListener(\"offline\", this.offlineEventListener, false);\n }\n // set ready state\n this.readyState = \"closed\";\n // clear session id\n this.id = null;\n // emit close event\n this.emitReserved(\"close\", reason, desc);\n // clean buffers after, so users can still\n // grab the buffers on `close` event\n this.writeBuffer = [];\n this.prevBufferLen = 0;\n }\n }\n /**\n * Filters upgrades, returning only those matching client transports.\n *\n * @param {Array} server upgrades\n * @api private\n *\n */\n filterUpgrades(upgrades) {\n const filteredUpgrades = [];\n let i = 0;\n const j = upgrades.length;\n for (; i < j; i++) {\n if (~this.transports.indexOf(upgrades[i]))\n filteredUpgrades.push(upgrades[i]);\n }\n return filteredUpgrades;\n }\n}\nSocket.protocol = protocol;\nfunction clone(obj) {\n const o = {};\n for (let i in obj) {\n if (obj.hasOwnProperty(i)) {\n o[i] = obj[i];\n }\n }\n return o;\n}\n","'use strict';\n\nfunction utf8Write(view, offset, str) {\n var c = 0;\n for (var i = 0, l = str.length; i < l; i++) {\n c = str.charCodeAt(i);\n if (c < 0x80) {\n view.setUint8(offset++, c);\n }\n else if (c < 0x800) {\n view.setUint8(offset++, 0xc0 | (c >> 6));\n view.setUint8(offset++, 0x80 | (c & 0x3f));\n }\n else if (c < 0xd800 || c >= 0xe000) {\n view.setUint8(offset++, 0xe0 | (c >> 12));\n view.setUint8(offset++, 0x80 | (c >> 6) & 0x3f);\n view.setUint8(offset++, 0x80 | (c & 0x3f));\n }\n else {\n i++;\n c = 0x10000 + (((c & 0x3ff) << 10) | (str.charCodeAt(i) & 0x3ff));\n view.setUint8(offset++, 0xf0 | (c >> 18));\n view.setUint8(offset++, 0x80 | (c >> 12) & 0x3f);\n view.setUint8(offset++, 0x80 | (c >> 6) & 0x3f);\n view.setUint8(offset++, 0x80 | (c & 0x3f));\n }\n }\n}\n\nfunction utf8Length(str) {\n var c = 0, length = 0;\n for (var i = 0, l = str.length; i < l; i++) {\n c = str.charCodeAt(i);\n if (c < 0x80) {\n length += 1;\n }\n else if (c < 0x800) {\n length += 2;\n }\n else if (c < 0xd800 || c >= 0xe000) {\n length += 3;\n }\n else {\n i++;\n length += 4;\n }\n }\n return length;\n}\n\nfunction _encode(bytes, defers, value) {\n var type = typeof value, i = 0, l = 0, hi = 0, lo = 0, length = 0, size = 0;\n\n if (type === 'string') {\n length = utf8Length(value);\n\n // fixstr\n if (length < 0x20) {\n bytes.push(length | 0xa0);\n size = 1;\n }\n // str 8\n else if (length < 0x100) {\n bytes.push(0xd9, length);\n size = 2;\n }\n // str 16\n else if (length < 0x10000) {\n bytes.push(0xda, length >> 8, length);\n size = 3;\n }\n // str 32\n else if (length < 0x100000000) {\n bytes.push(0xdb, length >> 24, length >> 16, length >> 8, length);\n size = 5;\n } else {\n throw new Error('String too long');\n }\n defers.push({ _str: value, _length: length, _offset: bytes.length });\n return size + length;\n }\n if (type === 'number') {\n // TODO: encode to float 32?\n\n // float 64\n if (Math.floor(value) !== value || !isFinite(value)) {\n bytes.push(0xcb);\n defers.push({ _float: value, _length: 8, _offset: bytes.length });\n return 9;\n }\n\n if (value >= 0) {\n // positive fixnum\n if (value < 0x80) {\n bytes.push(value);\n return 1;\n }\n // uint 8\n if (value < 0x100) {\n bytes.push(0xcc, value);\n return 2;\n }\n // uint 16\n if (value < 0x10000) {\n bytes.push(0xcd, value >> 8, value);\n return 3;\n }\n // uint 32\n if (value < 0x100000000) {\n bytes.push(0xce, value >> 24, value >> 16, value >> 8, value);\n return 5;\n }\n // uint 64\n hi = (value / Math.pow(2, 32)) >> 0;\n lo = value >>> 0;\n bytes.push(0xcf, hi >> 24, hi >> 16, hi >> 8, hi, lo >> 24, lo >> 16, lo >> 8, lo);\n return 9;\n } else {\n // negative fixnum\n if (value >= -0x20) {\n bytes.push(value);\n return 1;\n }\n // int 8\n if (value >= -0x80) {\n bytes.push(0xd0, value);\n return 2;\n }\n // int 16\n if (value >= -0x8000) {\n bytes.push(0xd1, value >> 8, value);\n return 3;\n }\n // int 32\n if (value >= -0x80000000) {\n bytes.push(0xd2, value >> 24, value >> 16, value >> 8, value);\n return 5;\n }\n // int 64\n hi = Math.floor(value / Math.pow(2, 32));\n lo = value >>> 0;\n bytes.push(0xd3, hi >> 24, hi >> 16, hi >> 8, hi, lo >> 24, lo >> 16, lo >> 8, lo);\n return 9;\n }\n }\n if (type === 'object') {\n // nil\n if (value === null) {\n bytes.push(0xc0);\n return 1;\n }\n\n if (Array.isArray(value)) {\n length = value.length;\n\n // fixarray\n if (length < 0x10) {\n bytes.push(length | 0x90);\n size = 1;\n }\n // array 16\n else if (length < 0x10000) {\n bytes.push(0xdc, length >> 8, length);\n size = 3;\n }\n // array 32\n else if (length < 0x100000000) {\n bytes.push(0xdd, length >> 24, length >> 16, length >> 8, length);\n size = 5;\n } else {\n throw new Error('Array too large');\n }\n for (i = 0; i < length; i++) {\n size += _encode(bytes, defers, value[i]);\n }\n return size;\n }\n\n // fixext 8 / Date\n if (value instanceof Date) {\n var time = value.getTime();\n hi = Math.floor(time / Math.pow(2, 32));\n lo = time >>> 0;\n bytes.push(0xd7, 0, hi >> 24, hi >> 16, hi >> 8, hi, lo >> 24, lo >> 16, lo >> 8, lo);\n return 10;\n }\n\n if (value instanceof ArrayBuffer) {\n length = value.byteLength;\n\n // bin 8\n if (length < 0x100) {\n bytes.push(0xc4, length);\n size = 2;\n } else\n // bin 16\n if (length < 0x10000) {\n bytes.push(0xc5, length >> 8, length);\n size = 3;\n } else\n // bin 32\n if (length < 0x100000000) {\n bytes.push(0xc6, length >> 24, length >> 16, length >> 8, length);\n size = 5;\n } else {\n throw new Error('Buffer too large');\n }\n defers.push({ _bin: value, _length: length, _offset: bytes.length });\n return size + length;\n }\n\n if (typeof value.toJSON === 'function') {\n return _encode(bytes, defers, value.toJSON());\n }\n\n var keys = [], key = '';\n\n var allKeys = Object.keys(value);\n for (i = 0, l = allKeys.length; i < l; i++) {\n key = allKeys[i];\n if (typeof value[key] !== 'function') {\n keys.push(key);\n }\n }\n length = keys.length;\n\n // fixmap\n if (length < 0x10) {\n bytes.push(length | 0x80);\n size = 1;\n }\n // map 16\n else if (length < 0x10000) {\n bytes.push(0xde, length >> 8, length);\n size = 3;\n }\n // map 32\n else if (length < 0x100000000) {\n bytes.push(0xdf, length >> 24, length >> 16, length >> 8, length);\n size = 5;\n } else {\n throw new Error('Object too large');\n }\n\n for (i = 0; i < length; i++) {\n key = keys[i];\n size += _encode(bytes, defers, key);\n size += _encode(bytes, defers, value[key]);\n }\n return size;\n }\n // false/true\n if (type === 'boolean') {\n bytes.push(value ? 0xc3 : 0xc2);\n return 1;\n }\n // fixext 1 / undefined\n if (type === 'undefined') {\n bytes.push(0xd4, 0, 0);\n return 3;\n }\n throw new Error('Could not encode');\n}\n\nfunction encode(value) {\n var bytes = [];\n var defers = [];\n var size = _encode(bytes, defers, value);\n var buf = new ArrayBuffer(size);\n var view = new DataView(buf);\n\n var deferIndex = 0;\n var deferWritten = 0;\n var nextOffset = -1;\n if (defers.length > 0) {\n nextOffset = defers[0]._offset;\n }\n\n var defer, deferLength = 0, offset = 0;\n for (var i = 0, l = bytes.length; i < l; i++) {\n view.setUint8(deferWritten + i, bytes[i]);\n if (i + 1 !== nextOffset) { continue; }\n defer = defers[deferIndex];\n deferLength = defer._length;\n offset = deferWritten + nextOffset;\n if (defer._bin) {\n var bin = new Uint8Array(defer._bin);\n for (var j = 0; j < deferLength; j++) {\n view.setUint8(offset + j, bin[j]);\n }\n } else if (defer._str) {\n utf8Write(view, offset, defer._str);\n } else if (defer._float !== undefined) {\n view.setFloat64(offset, defer._float);\n }\n deferIndex++;\n deferWritten += deferLength;\n if (defers[deferIndex]) {\n nextOffset = defers[deferIndex]._offset;\n }\n }\n return buf;\n}\n\nmodule.exports = encode;\n","'use strict';\n\nfunction Decoder(buffer) {\n this._offset = 0;\n if (buffer instanceof ArrayBuffer) {\n this._buffer = buffer;\n this._view = new DataView(this._buffer);\n } else if (ArrayBuffer.isView(buffer)) {\n this._buffer = buffer.buffer;\n this._view = new DataView(this._buffer, buffer.byteOffset, buffer.byteLength);\n } else {\n throw new Error('Invalid argument');\n }\n}\n\nfunction utf8Read(view, offset, length) {\n var string = '', chr = 0;\n for (var i = offset, end = offset + length; i < end; i++) {\n var byte = view.getUint8(i);\n if ((byte & 0x80) === 0x00) {\n string += String.fromCharCode(byte);\n continue;\n }\n if ((byte & 0xe0) === 0xc0) {\n string += String.fromCharCode(\n ((byte & 0x1f) << 6) |\n (view.getUint8(++i) & 0x3f)\n );\n continue;\n }\n if ((byte & 0xf0) === 0xe0) {\n string += String.fromCharCode(\n ((byte & 0x0f) << 12) |\n ((view.getUint8(++i) & 0x3f) << 6) |\n ((view.getUint8(++i) & 0x3f) << 0)\n );\n continue;\n }\n if ((byte & 0xf8) === 0xf0) {\n chr = ((byte & 0x07) << 18) |\n ((view.getUint8(++i) & 0x3f) << 12) |\n ((view.getUint8(++i) & 0x3f) << 6) |\n ((view.getUint8(++i) & 0x3f) << 0);\n if (chr >= 0x010000) { // surrogate pair\n chr -= 0x010000;\n string += String.fromCharCode((chr >>> 10) + 0xD800, (chr & 0x3FF) + 0xDC00);\n } else {\n string += String.fromCharCode(chr);\n }\n continue;\n }\n throw new Error('Invalid byte ' + byte.toString(16));\n }\n return string;\n}\n\nDecoder.prototype._array = function (length) {\n var value = new Array(length);\n for (var i = 0; i < length; i++) {\n value[i] = this._parse();\n }\n return value;\n};\n\nDecoder.prototype._map = function (length) {\n var key = '', value = {};\n for (var i = 0; i < length; i++) {\n key = this._parse();\n value[key] = this._parse();\n }\n return value;\n};\n\nDecoder.prototype._str = function (length) {\n var value = utf8Read(this._view, this._offset, length);\n this._offset += length;\n return value;\n};\n\nDecoder.prototype._bin = function (length) {\n var value = this._buffer.slice(this._offset, this._offset + length);\n this._offset += length;\n return value;\n};\n\nDecoder.prototype._parse = function () {\n var prefix = this._view.getUint8(this._offset++);\n var value, length = 0, type = 0, hi = 0, lo = 0;\n\n if (prefix < 0xc0) {\n // positive fixint\n if (prefix < 0x80) {\n return prefix;\n }\n // fixmap\n if (prefix < 0x90) {\n return this._map(prefix & 0x0f);\n }\n // fixarray\n if (prefix < 0xa0) {\n return this._array(prefix & 0x0f);\n }\n // fixstr\n return this._str(prefix & 0x1f);\n }\n\n // negative fixint\n if (prefix > 0xdf) {\n return (0xff - prefix + 1) * -1;\n }\n\n switch (prefix) {\n // nil\n case 0xc0:\n return null;\n // false\n case 0xc2:\n return false;\n // true\n case 0xc3:\n return true;\n\n // bin\n case 0xc4:\n length = this._view.getUint8(this._offset);\n this._offset += 1;\n return this._bin(length);\n case 0xc5:\n length = this._view.getUint16(this._offset);\n this._offset += 2;\n return this._bin(length);\n case 0xc6:\n length = this._view.getUint32(this._offset);\n this._offset += 4;\n return this._bin(length);\n\n // ext\n case 0xc7:\n length = this._view.getUint8(this._offset);\n type = this._view.getInt8(this._offset + 1);\n this._offset += 2;\n return [type, this._bin(length)];\n case 0xc8:\n length = this._view.getUint16(this._offset);\n type = this._view.getInt8(this._offset + 2);\n this._offset += 3;\n return [type, this._bin(length)];\n case 0xc9:\n length = this._view.getUint32(this._offset);\n type = this._view.getInt8(this._offset + 4);\n this._offset += 5;\n return [type, this._bin(length)];\n\n // float\n case 0xca:\n value = this._view.getFloat32(this._offset);\n this._offset += 4;\n return value;\n case 0xcb:\n value = this._view.getFloat64(this._offset);\n this._offset += 8;\n return value;\n\n // uint\n case 0xcc:\n value = this._view.getUint8(this._offset);\n this._offset += 1;\n return value;\n case 0xcd:\n value = this._view.getUint16(this._offset);\n this._offset += 2;\n return value;\n case 0xce:\n value = this._view.getUint32(this._offset);\n this._offset += 4;\n return value;\n case 0xcf:\n hi = this._view.getUint32(this._offset) * Math.pow(2, 32);\n lo = this._view.getUint32(this._offset + 4);\n this._offset += 8;\n return hi + lo;\n\n // int\n case 0xd0:\n value = this._view.getInt8(this._offset);\n this._offset += 1;\n return value;\n case 0xd1:\n value = this._view.getInt16(this._offset);\n this._offset += 2;\n return value;\n case 0xd2:\n value = this._view.getInt32(this._offset);\n this._offset += 4;\n return value;\n case 0xd3:\n hi = this._view.getInt32(this._offset) * Math.pow(2, 32);\n lo = this._view.getUint32(this._offset + 4);\n this._offset += 8;\n return hi + lo;\n\n // fixext\n case 0xd4:\n type = this._view.getInt8(this._offset);\n this._offset += 1;\n if (type === 0x00) {\n this._offset += 1;\n return void 0;\n }\n return [type, this._bin(1)];\n case 0xd5:\n type = this._view.getInt8(this._offset);\n this._offset += 1;\n return [type, this._bin(2)];\n case 0xd6:\n type = this._view.getInt8(this._offset);\n this._offset += 1;\n return [type, this._bin(4)];\n case 0xd7:\n type = this._view.getInt8(this._offset);\n this._offset += 1;\n if (type === 0x00) {\n hi = this._view.getInt32(this._offset) * Math.pow(2, 32);\n lo = this._view.getUint32(this._offset + 4);\n this._offset += 8;\n return new Date(hi + lo);\n }\n return [type, this._bin(8)];\n case 0xd8:\n type = this._view.getInt8(this._offset);\n this._offset += 1;\n return [type, this._bin(16)];\n\n // str\n case 0xd9:\n length = this._view.getUint8(this._offset);\n this._offset += 1;\n return this._str(length);\n case 0xda:\n length = this._view.getUint16(this._offset);\n this._offset += 2;\n return this._str(length);\n case 0xdb:\n length = this._view.getUint32(this._offset);\n this._offset += 4;\n return this._str(length);\n\n // array\n case 0xdc:\n length = this._view.getUint16(this._offset);\n this._offset += 2;\n return this._array(length);\n case 0xdd:\n length = this._view.getUint32(this._offset);\n this._offset += 4;\n return this._array(length);\n\n // map\n case 0xde:\n length = this._view.getUint16(this._offset);\n this._offset += 2;\n return this._map(length);\n case 0xdf:\n length = this._view.getUint32(this._offset);\n this._offset += 4;\n return this._map(length);\n }\n\n throw new Error('Could not parse');\n};\n\nfunction decode(buffer) {\n var decoder = new Decoder(buffer);\n var value = decoder._parse();\n if (decoder._offset !== buffer.byteLength) {\n throw new Error((buffer.byteLength - decoder._offset) + ' trailing bytes');\n }\n return value;\n}\n\nmodule.exports = decode;\n","exports.encode = require('./encode');\nexports.decode = require('./decode');\n","\r\n/**\r\n * Expose `Emitter`.\r\n */\r\n\r\nif (typeof module !== 'undefined') {\r\n module.exports = Emitter;\r\n}\r\n\r\n/**\r\n * Initialize a new `Emitter`.\r\n *\r\n * @api public\r\n */\r\n\r\nfunction Emitter(obj) {\r\n if (obj) return mixin(obj);\r\n};\r\n\r\n/**\r\n * Mixin the emitter properties.\r\n *\r\n * @param {Object} obj\r\n * @return {Object}\r\n * @api private\r\n */\r\n\r\nfunction mixin(obj) {\r\n for (var key in Emitter.prototype) {\r\n obj[key] = Emitter.prototype[key];\r\n }\r\n return obj;\r\n}\r\n\r\n/**\r\n * Listen on the given `event` with `fn`.\r\n *\r\n * @param {String} event\r\n * @param {Function} fn\r\n * @return {Emitter}\r\n * @api public\r\n */\r\n\r\nEmitter.prototype.on =\r\nEmitter.prototype.addEventListener = function(event, fn){\r\n this._callbacks = this._callbacks || {};\r\n (this._callbacks['$' + event] = this._callbacks['$' + event] || [])\r\n .push(fn);\r\n return this;\r\n};\r\n\r\n/**\r\n * Adds an `event` listener that will be invoked a single\r\n * time then automatically removed.\r\n *\r\n * @param {String} event\r\n * @param {Function} fn\r\n * @return {Emitter}\r\n * @api public\r\n */\r\n\r\nEmitter.prototype.once = function(event, fn){\r\n function on() {\r\n this.off(event, on);\r\n fn.apply(this, arguments);\r\n }\r\n\r\n on.fn = fn;\r\n this.on(event, on);\r\n return this;\r\n};\r\n\r\n/**\r\n * Remove the given callback for `event` or all\r\n * registered callbacks.\r\n *\r\n * @param {String} event\r\n * @param {Function} fn\r\n * @return {Emitter}\r\n * @api public\r\n */\r\n\r\nEmitter.prototype.off =\r\nEmitter.prototype.removeListener =\r\nEmitter.prototype.removeAllListeners =\r\nEmitter.prototype.removeEventListener = function(event, fn){\r\n this._callbacks = this._callbacks || {};\r\n\r\n // all\r\n if (0 == arguments.length) {\r\n this._callbacks = {};\r\n return this;\r\n }\r\n\r\n // specific event\r\n var callbacks = this._callbacks['$' + event];\r\n if (!callbacks) return this;\r\n\r\n // remove all handlers\r\n if (1 == arguments.length) {\r\n delete this._callbacks['$' + event];\r\n return this;\r\n }\r\n\r\n // remove specific handler\r\n var cb;\r\n for (var i = 0; i < callbacks.length; i++) {\r\n cb = callbacks[i];\r\n if (cb === fn || cb.fn === fn) {\r\n callbacks.splice(i, 1);\r\n break;\r\n }\r\n }\r\n\r\n // Remove event specific arrays for event types that no\r\n // one is subscribed for to avoid memory leak.\r\n if (callbacks.length === 0) {\r\n delete this._callbacks['$' + event];\r\n }\r\n\r\n return this;\r\n};\r\n\r\n/**\r\n * Emit `event` with the given args.\r\n *\r\n * @param {String} event\r\n * @param {Mixed} ...\r\n * @return {Emitter}\r\n */\r\n\r\nEmitter.prototype.emit = function(event){\r\n this._callbacks = this._callbacks || {};\r\n\r\n var args = new Array(arguments.length - 1)\r\n , callbacks = this._callbacks['$' + event];\r\n\r\n for (var i = 1; i < arguments.length; i++) {\r\n args[i - 1] = arguments[i];\r\n }\r\n\r\n if (callbacks) {\r\n callbacks = callbacks.slice(0);\r\n for (var i = 0, len = callbacks.length; i < len; ++i) {\r\n callbacks[i].apply(this, args);\r\n }\r\n }\r\n\r\n return this;\r\n};\r\n\r\n/**\r\n * Return array of callbacks for `event`.\r\n *\r\n * @param {String} event\r\n * @return {Array}\r\n * @api public\r\n */\r\n\r\nEmitter.prototype.listeners = function(event){\r\n this._callbacks = this._callbacks || {};\r\n return this._callbacks['$' + event] || [];\r\n};\r\n\r\n/**\r\n * Check if this emitter has `event` handlers.\r\n *\r\n * @param {String} event\r\n * @return {Boolean}\r\n * @api public\r\n */\r\n\r\nEmitter.prototype.hasListeners = function(event){\r\n return !! this.listeners(event).length;\r\n};\r\n","var msgpack = require(\"notepack.io\");\nvar Emitter = require(\"component-emitter\");\n\nexports.protocol = 5;\n\n/**\n * Packet types (see https://github.com/socketio/socket.io-protocol)\n */\n\nvar PacketType = (exports.PacketType = {\n CONNECT: 0,\n DISCONNECT: 1,\n EVENT: 2,\n ACK: 3,\n CONNECT_ERROR: 4,\n});\n\nvar isInteger =\n Number.isInteger ||\n function (value) {\n return (\n typeof value === \"number\" &&\n isFinite(value) &&\n Math.floor(value) === value\n );\n };\n\nvar isString = function (value) {\n return typeof value === \"string\";\n};\n\nvar isObject = function (value) {\n return Object.prototype.toString.call(value) === \"[object Object]\";\n};\n\nfunction Encoder() {}\n\nEncoder.prototype.encode = function (packet) {\n return [msgpack.encode(packet)];\n};\n\nfunction Decoder() {}\n\nEmitter(Decoder.prototype);\n\nDecoder.prototype.add = function (obj) {\n var decoded = msgpack.decode(obj);\n this.checkPacket(decoded);\n this.emit(\"decoded\", decoded);\n};\n\nfunction isDataValid(decoded) {\n switch (decoded.type) {\n case PacketType.CONNECT:\n return decoded.data === undefined || isObject(decoded.data);\n case PacketType.DISCONNECT:\n return decoded.data === undefined;\n case PacketType.CONNECT_ERROR:\n return isString(decoded.data) || isObject(decoded.data);\n default:\n return Array.isArray(decoded.data);\n }\n}\n\nDecoder.prototype.checkPacket = function (decoded) {\n var isTypeValid =\n isInteger(decoded.type) &&\n decoded.type >= PacketType.CONNECT &&\n decoded.type <= PacketType.CONNECT_ERROR;\n if (!isTypeValid) {\n throw new Error(\"invalid packet type\");\n }\n\n if (!isString(decoded.nsp)) {\n throw new Error(\"invalid namespace\");\n }\n\n if (!isDataValid(decoded)) {\n throw new Error(\"invalid payload\");\n }\n\n var isAckValid = decoded.id === undefined || isInteger(decoded.id);\n if (!isAckValid) {\n throw new Error(\"invalid packet id\");\n }\n};\n\nDecoder.prototype.destroy = function () {};\n\nexports.Encoder = Encoder;\nexports.Decoder = Decoder;\n","export function on(obj, ev, fn) {\n obj.on(ev, fn);\n return function subDestroy() {\n obj.off(ev, fn);\n };\n}\n","import { PacketType } from \"socket.io-parser\";\nimport { on } from \"./on.js\";\nimport { Emitter, } from \"@socket.io/component-emitter\";\n/**\n * Internal events.\n * These events can't be emitted by the user.\n */\nconst RESERVED_EVENTS = Object.freeze({\n connect: 1,\n connect_error: 1,\n disconnect: 1,\n disconnecting: 1,\n // EventEmitter reserved events: https://nodejs.org/api/events.html#events_event_newlistener\n newListener: 1,\n removeListener: 1,\n});\nexport class Socket extends Emitter {\n /**\n * `Socket` constructor.\n *\n * @public\n */\n constructor(io, nsp, opts) {\n super();\n this.connected = false;\n this.disconnected = true;\n this.receiveBuffer = [];\n this.sendBuffer = [];\n this.ids = 0;\n this.acks = {};\n this.flags = {};\n this.io = io;\n this.nsp = nsp;\n if (opts && opts.auth) {\n this.auth = opts.auth;\n }\n if (this.io._autoConnect)\n this.open();\n }\n /**\n * Subscribe to open, close and packet events\n *\n * @private\n */\n subEvents() {\n if (this.subs)\n return;\n const io = this.io;\n this.subs = [\n on(io, \"open\", this.onopen.bind(this)),\n on(io, \"packet\", this.onpacket.bind(this)),\n on(io, \"error\", this.onerror.bind(this)),\n on(io, \"close\", this.onclose.bind(this)),\n ];\n }\n /**\n * Whether the Socket will try to reconnect when its Manager connects or reconnects\n */\n get active() {\n return !!this.subs;\n }\n /**\n * \"Opens\" the socket.\n *\n * @public\n */\n connect() {\n if (this.connected)\n return this;\n this.subEvents();\n if (!this.io[\"_reconnecting\"])\n this.io.open(); // ensure open\n if (\"open\" === this.io._readyState)\n this.onopen();\n return this;\n }\n /**\n * Alias for connect()\n */\n open() {\n return this.connect();\n }\n /**\n * Sends a `message` event.\n *\n * @return self\n * @public\n */\n send(...args) {\n args.unshift(\"message\");\n this.emit.apply(this, args);\n return this;\n }\n /**\n * Override `emit`.\n * If the event is in `events`, it's emitted normally.\n *\n * @return self\n * @public\n */\n emit(ev, ...args) {\n if (RESERVED_EVENTS.hasOwnProperty(ev)) {\n throw new Error('\"' + ev + '\" is a reserved event name');\n }\n args.unshift(ev);\n const packet = {\n type: PacketType.EVENT,\n data: args,\n };\n packet.options = {};\n packet.options.compress = this.flags.compress !== false;\n // event ack callback\n if (\"function\" === typeof args[args.length - 1]) {\n const id = this.ids++;\n const ack = args.pop();\n this._registerAckCallback(id, ack);\n packet.id = id;\n }\n const isTransportWritable = this.io.engine &&\n this.io.engine.transport &&\n this.io.engine.transport.writable;\n const discardPacket = this.flags.volatile && (!isTransportWritable || !this.connected);\n if (discardPacket) {\n }\n else if (this.connected) {\n this.packet(packet);\n }\n else {\n this.sendBuffer.push(packet);\n }\n this.flags = {};\n return this;\n }\n /**\n * @private\n */\n _registerAckCallback(id, ack) {\n const timeout = this.flags.timeout;\n if (timeout === undefined) {\n this.acks[id] = ack;\n return;\n }\n // @ts-ignore\n const timer = this.io.setTimeoutFn(() => {\n delete this.acks[id];\n for (let i = 0; i < this.sendBuffer.length; i++) {\n if (this.sendBuffer[i].id === id) {\n this.sendBuffer.splice(i, 1);\n }\n }\n ack.call(this, new Error(\"operation has timed out\"));\n }, timeout);\n this.acks[id] = (...args) => {\n // @ts-ignore\n this.io.clearTimeoutFn(timer);\n ack.apply(this, [null, ...args]);\n };\n }\n /**\n * Sends a packet.\n *\n * @param packet\n * @private\n */\n packet(packet) {\n packet.nsp = this.nsp;\n this.io._packet(packet);\n }\n /**\n * Called upon engine `open`.\n *\n * @private\n */\n onopen() {\n if (typeof this.auth == \"function\") {\n this.auth((data) => {\n this.packet({ type: PacketType.CONNECT, data });\n });\n }\n else {\n this.packet({ type: PacketType.CONNECT, data: this.auth });\n }\n }\n /**\n * Called upon engine or manager `error`.\n *\n * @param err\n * @private\n */\n onerror(err) {\n if (!this.connected) {\n this.emitReserved(\"connect_error\", err);\n }\n }\n /**\n * Called upon engine `close`.\n *\n * @param reason\n * @private\n */\n onclose(reason) {\n this.connected = false;\n this.disconnected = true;\n delete this.id;\n this.emitReserved(\"disconnect\", reason);\n }\n /**\n * Called with socket packet.\n *\n * @param packet\n * @private\n */\n onpacket(packet) {\n const sameNamespace = packet.nsp === this.nsp;\n if (!sameNamespace)\n return;\n switch (packet.type) {\n case PacketType.CONNECT:\n if (packet.data && packet.data.sid) {\n const id = packet.data.sid;\n this.onconnect(id);\n }\n else {\n this.emitReserved(\"connect_error\", new Error(\"It seems you are trying to reach a Socket.IO server in v2.x with a v3.x client, but they are not compatible (more information here: https://socket.io/docs/v3/migrating-from-2-x-to-3-0/)\"));\n }\n break;\n case PacketType.EVENT:\n this.onevent(packet);\n break;\n case PacketType.BINARY_EVENT:\n this.onevent(packet);\n break;\n case PacketType.ACK:\n this.onack(packet);\n break;\n case PacketType.BINARY_ACK:\n this.onack(packet);\n break;\n case PacketType.DISCONNECT:\n this.ondisconnect();\n break;\n case PacketType.CONNECT_ERROR:\n this.destroy();\n const err = new Error(packet.data.message);\n // @ts-ignore\n err.data = packet.data.data;\n this.emitReserved(\"connect_error\", err);\n break;\n }\n }\n /**\n * Called upon a server event.\n *\n * @param packet\n * @private\n */\n onevent(packet) {\n const args = packet.data || [];\n if (null != packet.id) {\n args.push(this.ack(packet.id));\n }\n if (this.connected) {\n this.emitEvent(args);\n }\n else {\n this.receiveBuffer.push(Object.freeze(args));\n }\n }\n emitEvent(args) {\n if (this._anyListeners && this._anyListeners.length) {\n const listeners = this._anyListeners.slice();\n for (const listener of listeners) {\n listener.apply(this, args);\n }\n }\n super.emit.apply(this, args);\n }\n /**\n * Produces an ack callback to emit with an event.\n *\n * @private\n */\n ack(id) {\n const self = this;\n let sent = false;\n return function (...args) {\n // prevent double callbacks\n if (sent)\n return;\n sent = true;\n self.packet({\n type: PacketType.ACK,\n id: id,\n data: args,\n });\n };\n }\n /**\n * Called upon a server acknowlegement.\n *\n * @param packet\n * @private\n */\n onack(packet) {\n const ack = this.acks[packet.id];\n if (\"function\" === typeof ack) {\n ack.apply(this, packet.data);\n delete this.acks[packet.id];\n }\n else {\n }\n }\n /**\n * Called upon server connect.\n *\n * @private\n */\n onconnect(id) {\n this.id = id;\n this.connected = true;\n this.disconnected = false;\n this.emitBuffered();\n this.emitReserved(\"connect\");\n }\n /**\n * Emit buffered events (received and emitted).\n *\n * @private\n */\n emitBuffered() {\n this.receiveBuffer.forEach((args) => this.emitEvent(args));\n this.receiveBuffer = [];\n this.sendBuffer.forEach((packet) => this.packet(packet));\n this.sendBuffer = [];\n }\n /**\n * Called upon server disconnect.\n *\n * @private\n */\n ondisconnect() {\n this.destroy();\n this.onclose(\"io server disconnect\");\n }\n /**\n * Called upon forced client/server side disconnections,\n * this method ensures the manager stops tracking us and\n * that reconnections don't get triggered for this.\n *\n * @private\n */\n destroy() {\n if (this.subs) {\n // clean subscriptions to avoid reconnections\n this.subs.forEach((subDestroy) => subDestroy());\n this.subs = undefined;\n }\n this.io[\"_destroy\"](this);\n }\n /**\n * Disconnects the socket manually.\n *\n * @return self\n * @public\n */\n disconnect() {\n if (this.connected) {\n this.packet({ type: PacketType.DISCONNECT });\n }\n // remove socket from pool\n this.destroy();\n if (this.connected) {\n // fire events\n this.onclose(\"io client disconnect\");\n }\n return this;\n }\n /**\n * Alias for disconnect()\n *\n * @return self\n * @public\n */\n close() {\n return this.disconnect();\n }\n /**\n * Sets the compress flag.\n *\n * @param compress - if `true`, compresses the sending data\n * @return self\n * @public\n */\n compress(compress) {\n this.flags.compress = compress;\n return this;\n }\n /**\n * Sets a modifier for a subsequent event emission that the event message will be dropped when this socket is not\n * ready to send messages.\n *\n * @returns self\n * @public\n */\n get volatile() {\n this.flags.volatile = true;\n return this;\n }\n /**\n * Sets a modifier for a subsequent event emission that the callback will be called with an error when the\n * given number of milliseconds have elapsed without an acknowledgement from the server:\n *\n * ```\n * socket.timeout(5000).emit(\"my-event\", (err) => {\n * if (err) {\n * // the server did not acknowledge the event in the given delay\n * }\n * });\n * ```\n *\n * @returns self\n * @public\n */\n timeout(timeout) {\n this.flags.timeout = timeout;\n return this;\n }\n /**\n * Adds a listener that will be fired when any event is emitted. The event name is passed as the first argument to the\n * callback.\n *\n * @param listener\n * @public\n */\n onAny(listener) {\n this._anyListeners = this._anyListeners || [];\n this._anyListeners.push(listener);\n return this;\n }\n /**\n * Adds a listener that will be fired when any event is emitted. The event name is passed as the first argument to the\n * callback. The listener is added to the beginning of the listeners array.\n *\n * @param listener\n * @public\n */\n prependAny(listener) {\n this._anyListeners = this._anyListeners || [];\n this._anyListeners.unshift(listener);\n return this;\n }\n /**\n * Removes the listener that will be fired when any event is emitted.\n *\n * @param listener\n * @public\n */\n offAny(listener) {\n if (!this._anyListeners) {\n return this;\n }\n if (listener) {\n const listeners = this._anyListeners;\n for (let i = 0; i < listeners.length; i++) {\n if (listener === listeners[i]) {\n listeners.splice(i, 1);\n return this;\n }\n }\n }\n else {\n this._anyListeners = [];\n }\n return this;\n }\n /**\n * Returns an array of listeners that are listening for any event that is specified. This array can be manipulated,\n * e.g. to remove listeners.\n *\n * @public\n */\n listenersAny() {\n return this._anyListeners || [];\n }\n}\n","\n/**\n * Expose `Backoff`.\n */\n\nmodule.exports = Backoff;\n\n/**\n * Initialize backoff timer with `opts`.\n *\n * - `min` initial timeout in milliseconds [100]\n * - `max` max timeout [10000]\n * - `jitter` [0]\n * - `factor` [2]\n *\n * @param {Object} opts\n * @api public\n */\n\nfunction Backoff(opts) {\n opts = opts || {};\n this.ms = opts.min || 100;\n this.max = opts.max || 10000;\n this.factor = opts.factor || 2;\n this.jitter = opts.jitter > 0 && opts.jitter <= 1 ? opts.jitter : 0;\n this.attempts = 0;\n}\n\n/**\n * Return the backoff duration.\n *\n * @return {Number}\n * @api public\n */\n\nBackoff.prototype.duration = function(){\n var ms = this.ms * Math.pow(this.factor, this.attempts++);\n if (this.jitter) {\n var rand = Math.random();\n var deviation = Math.floor(rand * this.jitter * ms);\n ms = (Math.floor(rand * 10) & 1) == 0 ? ms - deviation : ms + deviation;\n }\n return Math.min(ms, this.max) | 0;\n};\n\n/**\n * Reset the number of attempts.\n *\n * @api public\n */\n\nBackoff.prototype.reset = function(){\n this.attempts = 0;\n};\n\n/**\n * Set the minimum duration\n *\n * @api public\n */\n\nBackoff.prototype.setMin = function(min){\n this.ms = min;\n};\n\n/**\n * Set the maximum duration\n *\n * @api public\n */\n\nBackoff.prototype.setMax = function(max){\n this.max = max;\n};\n\n/**\n * Set the jitter\n *\n * @api public\n */\n\nBackoff.prototype.setJitter = function(jitter){\n this.jitter = jitter;\n};\n\n","import { Socket as Engine, installTimerFunctions, } from \"engine.io-client\";\nimport { Socket } from \"./socket.js\";\nimport * as parser from \"socket.io-parser\";\nimport { on } from \"./on.js\";\nimport Backoff from \"backo2\";\nimport { Emitter, } from \"@socket.io/component-emitter\";\nexport class Manager extends Emitter {\n constructor(uri, opts) {\n var _a;\n super();\n this.nsps = {};\n this.subs = [];\n if (uri && \"object\" === typeof uri) {\n opts = uri;\n uri = undefined;\n }\n opts = opts || {};\n opts.path = opts.path || \"/socket.io\";\n this.opts = opts;\n installTimerFunctions(this, opts);\n this.reconnection(opts.reconnection !== false);\n this.reconnectionAttempts(opts.reconnectionAttempts || Infinity);\n this.reconnectionDelay(opts.reconnectionDelay || 1000);\n this.reconnectionDelayMax(opts.reconnectionDelayMax || 5000);\n this.randomizationFactor((_a = opts.randomizationFactor) !== null && _a !== void 0 ? _a : 0.5);\n this.backoff = new Backoff({\n min: this.reconnectionDelay(),\n max: this.reconnectionDelayMax(),\n jitter: this.randomizationFactor(),\n });\n this.timeout(null == opts.timeout ? 20000 : opts.timeout);\n this._readyState = \"closed\";\n this.uri = uri;\n const _parser = opts.parser || parser;\n this.encoder = new _parser.Encoder();\n this.decoder = new _parser.Decoder();\n this._autoConnect = opts.autoConnect !== false;\n if (this._autoConnect)\n this.open();\n }\n reconnection(v) {\n if (!arguments.length)\n return this._reconnection;\n this._reconnection = !!v;\n return this;\n }\n reconnectionAttempts(v) {\n if (v === undefined)\n return this._reconnectionAttempts;\n this._reconnectionAttempts = v;\n return this;\n }\n reconnectionDelay(v) {\n var _a;\n if (v === undefined)\n return this._reconnectionDelay;\n this._reconnectionDelay = v;\n (_a = this.backoff) === null || _a === void 0 ? void 0 : _a.setMin(v);\n return this;\n }\n randomizationFactor(v) {\n var _a;\n if (v === undefined)\n return this._randomizationFactor;\n this._randomizationFactor = v;\n (_a = this.backoff) === null || _a === void 0 ? void 0 : _a.setJitter(v);\n return this;\n }\n reconnectionDelayMax(v) {\n var _a;\n if (v === undefined)\n return this._reconnectionDelayMax;\n this._reconnectionDelayMax = v;\n (_a = this.backoff) === null || _a === void 0 ? void 0 : _a.setMax(v);\n return this;\n }\n timeout(v) {\n if (!arguments.length)\n return this._timeout;\n this._timeout = v;\n return this;\n }\n /**\n * Starts trying to reconnect if reconnection is enabled and we have not\n * started reconnecting yet\n *\n * @private\n */\n maybeReconnectOnOpen() {\n // Only try to reconnect if it's the first time we're connecting\n if (!this._reconnecting &&\n this._reconnection &&\n this.backoff.attempts === 0) {\n // keeps reconnection from firing twice for the same reconnection loop\n this.reconnect();\n }\n }\n /**\n * Sets the current transport `socket`.\n *\n * @param {Function} fn - optional, callback\n * @return self\n * @public\n */\n open(fn) {\n if (~this._readyState.indexOf(\"open\"))\n return this;\n this.engine = new Engine(this.uri, this.opts);\n const socket = this.engine;\n const self = this;\n this._readyState = \"opening\";\n this.skipReconnect = false;\n // emit `open`\n const openSubDestroy = on(socket, \"open\", function () {\n self.onopen();\n fn && fn();\n });\n // emit `error`\n const errorSub = on(socket, \"error\", (err) => {\n self.cleanup();\n self._readyState = \"closed\";\n this.emitReserved(\"error\", err);\n if (fn) {\n fn(err);\n }\n else {\n // Only do this if there is no fn to handle the error\n self.maybeReconnectOnOpen();\n }\n });\n if (false !== this._timeout) {\n const timeout = this._timeout;\n if (timeout === 0) {\n openSubDestroy(); // prevents a race condition with the 'open' event\n }\n // set timer\n const timer = this.setTimeoutFn(() => {\n openSubDestroy();\n socket.close();\n // @ts-ignore\n socket.emit(\"error\", new Error(\"timeout\"));\n }, timeout);\n if (this.opts.autoUnref) {\n timer.unref();\n }\n this.subs.push(function subDestroy() {\n clearTimeout(timer);\n });\n }\n this.subs.push(openSubDestroy);\n this.subs.push(errorSub);\n return this;\n }\n /**\n * Alias for open()\n *\n * @return self\n * @public\n */\n connect(fn) {\n return this.open(fn);\n }\n /**\n * Called upon transport open.\n *\n * @private\n */\n onopen() {\n // clear old subs\n this.cleanup();\n // mark as open\n this._readyState = \"open\";\n this.emitReserved(\"open\");\n // add new subs\n const socket = this.engine;\n this.subs.push(on(socket, \"ping\", this.onping.bind(this)), on(socket, \"data\", this.ondata.bind(this)), on(socket, \"error\", this.onerror.bind(this)), on(socket, \"close\", this.onclose.bind(this)), on(this.decoder, \"decoded\", this.ondecoded.bind(this)));\n }\n /**\n * Called upon a ping.\n *\n * @private\n */\n onping() {\n this.emitReserved(\"ping\");\n }\n /**\n * Called with data.\n *\n * @private\n */\n ondata(data) {\n this.decoder.add(data);\n }\n /**\n * Called when parser fully decodes a packet.\n *\n * @private\n */\n ondecoded(packet) {\n this.emitReserved(\"packet\", packet);\n }\n /**\n * Called upon socket error.\n *\n * @private\n */\n onerror(err) {\n this.emitReserved(\"error\", err);\n }\n /**\n * Creates a new socket for the given `nsp`.\n *\n * @return {Socket}\n * @public\n */\n socket(nsp, opts) 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