engine.io.esm.min.js.map 84 KB

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  1. {"version":3,"file":"engine.io.esm.min.js","sources":["../node_modules/engine.io-parser/build/esm/commons.js","../node_modules/engine.io-parser/build/esm/encodePacket.browser.js","../node_modules/@socket.io/base64-arraybuffer/dist/base64-arraybuffer.es5.js","../node_modules/engine.io-parser/build/esm/decodePacket.browser.js","../node_modules/engine.io-parser/build/esm/index.js","../node_modules/@socket.io/component-emitter/index.mjs","../build/esm/globalThis.browser.js","../build/esm/util.js","../build/esm/transport.js","../build/esm/contrib/yeast.js","../build/esm/contrib/parseqs.js","../build/esm/contrib/has-cors.js","../build/esm/transports/xmlhttprequest.browser.js","../build/esm/transports/polling.js","../build/esm/transports/websocket-constructor.browser.js","../build/esm/transports/websocket.js","../build/esm/transports/index.js","../build/esm/contrib/parseuri.js","../build/esm/socket.js","../build/esm/index.js"],"sourcesContent":["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","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","/*\n * base64-arraybuffer 1.0.1 <https://github.com/niklasvh/base64-arraybuffer>\n * Copyright (c) 2022 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 { ERROR_PACKET, PACKET_TYPES_REVERSE } from \"./commons.js\";\nimport { decode } from \"@socket.io/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","/**\n * Initialize a new `Emitter`.\n *\n * @api public\n */\n\nexport function 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","export const globalThisShim = (() => {\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","import { globalThisShim as 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// base64 encoded buffers are about 33% bigger (https://en.wikipedia.org/wiki/Base64)\nconst BASE64_OVERHEAD = 1.33;\n// we could also have used `new Blob([obj]).size`, but it isn't supported in IE9\nexport function byteLength(obj) {\n if (typeof obj === \"string\") {\n return utf8Length(obj);\n }\n // arraybuffer or blob\n return Math.ceil((obj.byteLength || obj.size) * BASE64_OVERHEAD);\n}\nfunction utf8Length(str) {\n let c = 0, length = 0;\n for (let 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","import { decodePacket } from \"engine.io-parser\";\nimport { Emitter } from \"@socket.io/component-emitter\";\nimport { installTimerFunctions } from \"./util.js\";\nclass TransportError extends Error {\n constructor(reason, description, context) {\n super(reason);\n this.description = description;\n this.context = context;\n this.type = \"TransportError\";\n }\n}\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} reason\n * @param description\n * @param context - the error context\n * @return {Transport} for chaining\n * @api protected\n */\n onError(reason, description, context) {\n super.emitReserved(\"error\", new TransportError(reason, description, context));\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.emitReserved(\"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.emitReserved(\"packet\", packet);\n }\n /**\n * Called upon close.\n *\n * @api protected\n */\n onClose(details) {\n this.readyState = \"closed\";\n super.emitReserved(\"close\", details);\n }\n}\n","// imported from https://github.com/unshiftio/yeast\n'use strict';\nconst alphabet = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_'.split(''), length = 64, map = {};\nlet seed = 0, i = 0, prev;\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 */\nexport function encode(num) {\n let encoded = '';\n do {\n encoded = alphabet[num % length] + encoded;\n num = Math.floor(num / length);\n } while (num > 0);\n return encoded;\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 */\nexport function decode(str) {\n let decoded = 0;\n for (i = 0; i < str.length; i++) {\n decoded = decoded * length + map[str.charAt(i)];\n }\n return decoded;\n}\n/**\n * Yeast: A tiny growing id generator.\n *\n * @returns {String} A unique id.\n * @api public\n */\nexport function yeast() {\n const now = encode(+new Date());\n if (now !== prev)\n return seed = 0, prev = now;\n return now + '.' + encode(seed++);\n}\n//\n// Map each character to its index.\n//\nfor (; i < length; i++)\n map[alphabet[i]] = i;\n","// imported from https://github.com/galkn/querystring\n/**\n * Compiles a querystring\n * Returns string representation of the object\n *\n * @param {Object}\n * @api private\n */\nexport function encode(obj) {\n let str = '';\n for (let i in obj) {\n if (obj.hasOwnProperty(i)) {\n if (str.length)\n str += '&';\n str += encodeURIComponent(i) + '=' + encodeURIComponent(obj[i]);\n }\n }\n return str;\n}\n/**\n * Parses a simple querystring into an object\n *\n * @param {String} qs\n * @api private\n */\nexport function decode(qs) {\n let qry = {};\n let pairs = qs.split('&');\n for (let i = 0, l = pairs.length; i < l; i++) {\n let pair = pairs[i].split('=');\n qry[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1]);\n }\n return qry;\n}\n","// imported from https://github.com/component/has-cors\nlet value = false;\ntry {\n value = typeof XMLHttpRequest !== 'undefined' &&\n 'withCredentials' in new XMLHttpRequest();\n}\ncatch (err) {\n // if XMLHttp support is disabled in IE then it will throw\n // when trying to create\n}\nexport const hasCORS = value;\n","// browser shim for xmlhttprequest module\nimport { hasCORS } from \"../contrib/has-cors.js\";\nimport { globalThisShim as globalThis } from \"../globalThis.js\";\nexport function XHR(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 { Transport } from \"../transport.js\";\nimport { yeast } from \"../contrib/yeast.js\";\nimport { encode } from \"../contrib/parseqs.js\";\nimport { encodePayload, decodePayload } from \"engine.io-parser\";\nimport { XHR as XMLHttpRequest } from \"./xmlhttprequest.js\";\nimport { Emitter } from \"@socket.io/component-emitter\";\nimport { installTimerFunctions, pick } from \"../util.js\";\nimport { globalThisShim as globalThis } from \"../globalThis.js\";\nfunction empty() { }\nconst hasXHR2 = (function () {\n const xhr = new XMLHttpRequest({\n xdomain: false\n });\n return null != xhr.responseType;\n})();\nexport class Polling extends Transport {\n /**\n * XHR Polling constructor.\n *\n * @param {Object} opts\n * @api public\n */\n constructor(opts) {\n super(opts);\n this.polling = false;\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 * 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.emitReserved(\"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({ description: \"transport closed by the server\" });\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.emitReserved(\"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.emitReserved(\"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 = 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 * 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\", (xhrStatus, context) => {\n this.onError(\"xhr post error\", xhrStatus, context);\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\", (xhrStatus, context) => {\n this.onError(\"xhr poll error\", xhrStatus, context);\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 error.\n *\n * @api private\n */\n onError(err) {\n this.emitReserved(\"error\", err, this.xhr);\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.emitReserved(\"data\", data);\n this.emitReserved(\"success\");\n this.cleanup();\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 { globalThisShim as 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 { encode } from \"../contrib/parseqs.js\";\nimport { yeast } from \"../contrib/yeast.js\";\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.emitReserved(\"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 = closeEvent => this.onClose({\n description: \"websocket connection closed\",\n context: closeEvent\n });\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 = \n // @ts-ignore\n \"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.emitReserved(\"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 = 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 }\n}\n","import { Polling } from \"./polling.js\";\nimport { WS } from \"./websocket.js\";\nexport const transports = {\n websocket: WS,\n polling: Polling\n};\n","// imported from https://github.com/galkn/parseuri\n/**\n * Parses an URI\n *\n * @author Steven Levithan <stevenlevithan.com> (MIT license)\n * @api private\n */\nconst re = /^(?:(?![^:@]+:[^:@\\/]*@)(http|https|ws|wss):\\/\\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:\\/?#]*)(?::(\\d*))?)(((\\/(?:[^?#](?![^?#\\/]*\\.[^?#\\/.]+(?:[?#]|$)))*\\/?)?([^?#\\/]*))(?:\\?([^#]*))?(?:#(.*))?)/;\nconst parts = [\n 'source', 'protocol', 'authority', 'userInfo', 'user', 'password', 'host', 'port', 'relative', 'path', 'directory', 'file', 'query', 'anchor'\n];\nexport function parse(str) {\n const src = str, b = str.indexOf('['), e = str.indexOf(']');\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 let m = re.exec(str || ''), uri = {}, i = 14;\n while (i--) {\n uri[parts[i]] = m[i] || '';\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 uri.pathNames = pathNames(uri, uri['path']);\n uri.queryKey = queryKey(uri, uri['query']);\n return uri;\n}\nfunction pathNames(obj, path) {\n const regx = /\\/{2,9}/g, names = path.replace(regx, \"/\").split(\"/\");\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 return names;\n}\nfunction queryKey(uri, query) {\n const data = {};\n query.replace(/(?:^|&)([^&=]*)=?([^&]*)/g, function ($0, $1, $2) {\n if ($1) {\n data[$1] = $2;\n }\n });\n return data;\n}\n","import { transports } from \"./transports/index.js\";\nimport { installTimerFunctions, byteLength } from \"./util.js\";\nimport { decode } from \"./contrib/parseqs.js\";\nimport { parse } from \"./contrib/parseuri.js\";\nimport { Emitter } from \"@socket.io/component-emitter\";\nimport { protocol } from \"engine.io-parser\";\nexport class Socket extends Emitter {\n /**\n * Socket constructor.\n *\n * @param {String|Object} uri or options\n * @param {Object} opts - options\n * @api public\n */\n constructor(uri, opts = {}) {\n super();\n if (uri && \"object\" === typeof uri) {\n opts = uri;\n uri = null;\n }\n if (uri) {\n uri = parse(uri);\n opts.hostname = uri.host;\n opts.secure = uri.protocol === \"https\" || uri.protocol === \"wss\";\n opts.port = uri.port;\n if (uri.query)\n opts.query = uri.query;\n }\n else if (opts.host) {\n opts.hostname = parse(opts.host).host;\n }\n installTimerFunctions(this, opts);\n this.secure =\n null != opts.secure\n ? opts.secure\n : typeof location !== \"undefined\" && \"https:\" === location.protocol;\n if (opts.hostname && !opts.port) {\n // if no port is specified manually, use the protocol default\n opts.port = this.secure ? \"443\" : \"80\";\n }\n this.hostname =\n opts.hostname ||\n (typeof location !== \"undefined\" ? location.hostname : \"localhost\");\n this.port =\n opts.port ||\n (typeof location !== \"undefined\" && location.port\n ? location.port\n : this.secure\n ? \"443\"\n : \"80\");\n this.transports = opts.transports || [\"polling\", \"websocket\"];\n this.readyState = \"\";\n this.writeBuffer = [];\n this.prevBufferLen = 0;\n this.opts = Object.assign({\n path: \"/engine.io\",\n agent: false,\n withCredentials: false,\n upgrade: true,\n timestampParam: \"t\",\n rememberUpgrade: false,\n rejectUnauthorized: true,\n perMessageDeflate: {\n threshold: 1024\n },\n transportOptions: {},\n closeOnBeforeunload: true\n }, opts);\n this.opts.path = this.opts.path.replace(/\\/$/, \"\") + \"/\";\n if (typeof this.opts.query === \"string\") {\n this.opts.query = 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 description: \"network connection lost\"\n });\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 = Object.assign({}, 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\", reason => this.onClose(\"transport close\", reason));\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.maxPayload = data.maxPayload;\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(() => 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