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{ decodePacket } from \"engine.io-parser\";\nimport { Emitter } from \"@socket.io/component-emitter\";\nimport { installTimerFunctions } from \"./util.js\";\nimport { encode } from \"./contrib/parseqs.js\";\nexport class 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} opts - options\n     * @protected\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.socket = opts.socket;\n        this.supportsBinary = !opts.forceBase64;\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     * @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    open() {\n        this.readyState = \"opening\";\n        this.doOpen();\n        return this;\n    }\n    /**\n     * Closes the transport.\n     */\n    close() {\n        if (this.readyState === \"opening\" || this.readyState === \"open\") {\n            this.doClose();\n            this.onClose();\n        }\n        return this;\n    }\n    /**\n     * Sends multiple packets.\n     *\n     * @param {Array} packets\n     */\n    send(packets) {\n        if (this.readyState === \"open\") {\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     * @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     * @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     * @protected\n     */\n    onPacket(packet) {\n        super.emitReserved(\"packet\", packet);\n    }\n    /**\n     * Called upon close.\n     *\n     * @protected\n     */\n    onClose(details) {\n        this.readyState = \"closed\";\n        super.emitReserved(\"close\", details);\n    }\n    /**\n     * Pauses the transport, in order not to lose packets during an upgrade.\n     *\n     * @param onPause\n     */\n    pause(onPause) { }\n    createUri(schema, query = {}) {\n        return (schema +\n            \"://\" +\n            this._hostname() +\n            this._port() +\n            this.opts.path +\n            this._query(query));\n    }\n    _hostname() {\n        const hostname = this.opts.hostname;\n        return hostname.indexOf(\":\") === -1 ? hostname : \"[\" + hostname + \"]\";\n    }\n    _port() {\n        if (this.opts.port \u0026\u0026\n            ((this.opts.secure \u0026\u0026 Number(this.opts.port) !== 443) ||\n                (!this.opts.secure \u0026\u0026 Number(this.opts.port) !== 80))) {\n            return \":\" + this.opts.port;\n        }\n        else {\n            return \"\";\n        }\n    }\n    _query(query) {\n        const encodedQuery = encode(query);\n        return encodedQuery.length ? \"?\" + encodedQuery : \"\";\n    }\n}\n","export const nextTick = (() =\u003e {\n    const isPromiseAvailable = typeof Promise === \"function\" \u0026\u0026 typeof Promise.resolve === \"function\";\n    if (isPromiseAvailable) {\n        return (cb) =\u003e Promise.resolve().then(cb);\n    }\n    else {\n        return (cb, setTimeoutFn) =\u003e setTimeoutFn(cb, 0);\n    }\n})();\nexport const globalThisShim = (() =\u003e {\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})();\nexport const defaultBinaryType = \"arraybuffer\";\nexport function createCookieJar() { }\n","import { globalThisShim as globalThis } from \"./globals.node.js\";\nexport function pick(obj, ...attr) {\n    return attr.reduce((acc, k) =\u003e {\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 = globalThis.setTimeout;\nconst NATIVE_CLEAR_TIMEOUT = globalThis.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 = globalThis.setTimeout.bind(globalThis);\n        obj.clearTimeoutFn = globalThis.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 \u003c l; i++) {\n        c = str.charCodeAt(i);\n        if (c \u003c 0x80) {\n            length += 1;\n        }\n        else if (c \u003c 0x800) {\n            length += 2;\n        }\n        else if (c \u003c 0xd800 || c \u003e= 0xe000) {\n            length += 3;\n        }\n        else {\n            i++;\n            length += 4;\n        }\n    }\n    return length;\n}\n/**\n * Generates a random 8-characters string.\n */\nexport function randomString() {\n    return (Date.now().toString(36).substring(3) +\n        Math.random().toString(36).substring(2, 5));\n}\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 += '\u0026';\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('\u0026');\n    for (let i = 0, l = pairs.length; i \u003c l; i++) {\n        let pair = pairs[i].split('=');\n        qry[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1]);\n    }\n    return qry;\n}\n","import { Transport } from \"../transport.js\";\nimport { randomString } from \"../util.js\";\nimport { encodePayload, decodePayload } from \"engine.io-parser\";\nexport class Polling extends Transport {\n    constructor() {\n        super(...arguments);\n        this._polling = false;\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     * @protected\n     */\n    doOpen() {\n        this._poll();\n    }\n    /**\n     * Pauses polling.\n     *\n     * @param {Function} onPause - callback upon buffers are flushed and transport is paused\n     * @package\n     */\n    pause(onPause) {\n        this.readyState = \"pausing\";\n        const pause = () =\u003e {\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     * @private\n     */\n    _poll() {\n        this._polling = true;\n        this.doPoll();\n        this.emitReserved(\"poll\");\n    }\n    /**\n     * Overloads onData to detect payloads.\n     *\n     * @protected\n     */\n    onData(data) {\n        const callback = (packet) =\u003e {\n            // if its the first message we consider the transport open\n            if (\"opening\" === this.readyState \u0026\u0026 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     * @protected\n     */\n    doClose() {\n        const close = () =\u003e {\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} packets - data packets\n     * @protected\n     */\n    write(packets) {\n        this.writable = false;\n        encodePayload(packets, (data) =\u003e {\n            this.doWrite(data, () =\u003e {\n                this.writable = true;\n                this.emitReserved(\"drain\");\n            });\n        });\n    }\n    /**\n     * Generates uri for connection.\n     *\n     * @private\n     */\n    uri() {\n        const schema = this.opts.secure ? \"https\" : \"http\";\n        const query = this.query || {};\n        // cache busting is forced\n        if (false !== this.opts.timestampRequests) {\n            query[this.opts.timestampParam] = randomString();\n        }\n        if (!this.supportsBinary \u0026\u0026 !query.sid) {\n            query.b64 = 1;\n        }\n        return this.createUri(schema, query);\n    }\n}\n","import { Polling } from \"./polling.js\";\nimport { Emitter } from \"@socket.io/component-emitter\";\nimport { installTimerFunctions, pick } from \"../util.js\";\nimport { globalThisShim as globalThis } from \"../globals.node.js\";\nimport { hasCORS } from \"../contrib/has-cors.js\";\nfunction empty() { }\nexport class BaseXHR extends Polling {\n    /**\n     * XHR Polling constructor.\n     *\n     * @param {Object} opts\n     * @package\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\" \u0026\u0026\n                    opts.hostname !== location.hostname) ||\n                    port !== opts.port;\n        }\n    }\n    /**\n     * Sends data.\n     *\n     * @param {String} data to send.\n     * @param {Function} called upon flush.\n     * @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) =\u003e {\n            this.onError(\"xhr post error\", xhrStatus, context);\n        });\n    }\n    /**\n     * Starts a poll cycle.\n     *\n     * @private\n     */\n    doPoll() {\n        const req = this.request();\n        req.on(\"data\", this.onData.bind(this));\n        req.on(\"error\", (xhrStatus, context) =\u003e {\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     * @package\n     */\n    constructor(createRequest, uri, opts) {\n        super();\n        this.createRequest = createRequest;\n        installTimerFunctions(this, opts);\n        this._opts = opts;\n        this._method = opts.method || \"GET\";\n        this._uri = uri;\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     * @private\n     */\n    _create() {\n        var _a;\n        const opts = pick(this._opts, \"agent\", \"pfx\", \"key\", \"passphrase\", \"cert\", \"ca\", \"ciphers\", \"rejectUnauthorized\", \"autoUnref\");\n        opts.xdomain = !!this._opts.xd;\n        const xhr = (this._xhr = this.createRequest(opts));\n        try {\n            xhr.open(this._method, this._uri, true);\n            try {\n                if (this._opts.extraHeaders) {\n                    // @ts-ignore\n                    xhr.setDisableHeaderCheck \u0026\u0026 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            (_a = this._opts.cookieJar) === null || _a === void 0 ? void 0 : _a.addCookies(xhr);\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 = () =\u003e {\n                var _a;\n                if (xhr.readyState === 3) {\n                    (_a = this._opts.cookieJar) === null || _a === void 0 ? void 0 : _a.parseCookies(\n                    // @ts-ignore\n                    xhr.getResponseHeader(\"set-cookie\"));\n                }\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(() =\u003e {\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(() =\u003e {\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     * @private\n     */\n    _onError(err) {\n        this.emitReserved(\"error\", err, this._xhr);\n        this._cleanup(true);\n    }\n    /**\n     * Cleans up house.\n     *\n     * @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     * @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     * @package\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}\nconst hasXHR2 = (function () {\n    const xhr = newRequest({\n        xdomain: false,\n    });\n    return xhr \u0026\u0026 xhr.responseType !== null;\n})();\n/**\n * HTTP long-polling based on the built-in `XMLHttpRequest` object.\n *\n * Usage: browser\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest\n */\nexport class XHR extends BaseXHR {\n    constructor(opts) {\n        super(opts);\n        const forceBase64 = opts \u0026\u0026 opts.forceBase64;\n        this.supportsBinary = hasXHR2 \u0026\u0026 !forceBase64;\n    }\n    request(opts = {}) {\n        Object.assign(opts, { xd: this.xd }, this.opts);\n        return new Request(newRequest, this.uri(), opts);\n    }\n}\nfunction newRequest(opts) {\n    const xdomain = opts.xdomain;\n    // XMLHttpRequest can be disabled on IE\n    try {\n        if (\"undefined\" !== typeof XMLHttpRequest \u0026\u0026 (!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","// imported from https://github.com/component/has-cors\nlet value = false;\ntry {\n    value = typeof XMLHttpRequest !== 'undefined' \u0026\u0026\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","import { Transport } from \"../transport.js\";\nimport { pick, randomString } from \"../util.js\";\nimport { encodePacket } from \"engine.io-parser\";\nimport { globalThisShim as globalThis, nextTick } from \"../globals.node.js\";\n// detect ReactNative environment\nconst isReactNative = typeof navigator !== \"undefined\" \u0026\u0026\n    typeof navigator.product === \"string\" \u0026\u0026\n    navigator.product.toLowerCase() === \"reactnative\";\nexport class BaseWS extends Transport {\n    get name() {\n        return \"websocket\";\n    }\n    doOpen() {\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 = this.createSocket(uri, protocols, opts);\n        }\n        catch (err) {\n            return this.emitReserved(\"error\", err);\n        }\n        this.ws.binaryType = this.socket.binaryType;\n        this.addEventListeners();\n    }\n    /**\n     * Adds event listeners to the socket\n     *\n     * @private\n     */\n    addEventListeners() {\n        this.ws.onopen = () =\u003e {\n            if (this.opts.autoUnref) {\n                this.ws._socket.unref();\n            }\n            this.onOpen();\n        };\n        this.ws.onclose = (closeEvent) =\u003e this.onClose({\n            description: \"websocket connection closed\",\n            context: closeEvent,\n        });\n        this.ws.onmessage = (ev) =\u003e this.onData(ev.data);\n        this.ws.onerror = (e) =\u003e this.onError(\"websocket error\", e);\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 \u003c packets.length; i++) {\n            const packet = packets[i];\n            const lastPacket = i === packets.length - 1;\n            encodePacket(packet, this.supportsBinary, (data) =\u003e {\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                    this.doWrite(packet, data);\n                }\n                catch (e) {\n                }\n                if (lastPacket) {\n                    // fake drain\n                    // defer to next tick to allow Socket to clear writeBuffer\n                    nextTick(() =\u003e {\n                        this.writable = true;\n                        this.emitReserved(\"drain\");\n                    }, this.setTimeoutFn);\n                }\n            });\n        }\n    }\n    doClose() {\n        if (typeof this.ws !== \"undefined\") {\n            this.ws.onerror = () =\u003e { };\n            this.ws.close();\n            this.ws = null;\n        }\n    }\n    /**\n     * Generates uri for connection.\n     *\n     * @private\n     */\n    uri() {\n        const schema = this.opts.secure ? \"wss\" : \"ws\";\n        const query = this.query || {};\n        // append timestamp to URI\n        if (this.opts.timestampRequests) {\n            query[this.opts.timestampParam] = randomString();\n        }\n        // communicate binary support capabilities\n        if (!this.supportsBinary) {\n            query.b64 = 1;\n        }\n        return this.createUri(schema, query);\n    }\n}\nconst WebSocketCtor = globalThis.WebSocket || globalThis.MozWebSocket;\n/**\n * WebSocket transport based on the built-in `WebSocket` object.\n *\n * Usage: browser, Node.js (since v21), Deno, Bun\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/WebSocket\n * @see https://caniuse.com/mdn-api_websocket\n * @see https://nodejs.org/api/globals.html#websocket\n */\nexport class WS extends BaseWS {\n    createSocket(uri, protocols, opts) {\n        return !isReactNative\n            ? protocols\n                ? new WebSocketCtor(uri, protocols)\n                : new WebSocketCtor(uri)\n            : new WebSocketCtor(uri, protocols, opts);\n    }\n    doWrite(_packet, data) {\n        this.ws.send(data);\n    }\n}\n","import { Transport } from \"../transport.js\";\nimport { nextTick } from \"../globals.node.js\";\nimport { createPacketDecoderStream, createPacketEncoderStream, } from \"engine.io-parser\";\n/**\n * WebTransport transport based on the built-in `WebTransport` object.\n *\n * Usage: browser, Node.js (with the `@fails-components/webtransport` package)\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/WebTransport\n * @see https://caniuse.com/webtransport\n */\nexport class WT extends Transport {\n    get name() {\n        return \"webtransport\";\n    }\n    doOpen() {\n        try {\n            // @ts-ignore\n            this._transport = new WebTransport(this.createUri(\"https\"), this.opts.transportOptions[this.name]);\n        }\n        catch (err) {\n            return this.emitReserved(\"error\", err);\n        }\n        this._transport.closed\n            .then(() =\u003e {\n            this.onClose();\n        })\n            .catch((err) =\u003e {\n            this.onError(\"webtransport error\", err);\n        });\n        // note: we could have used async/await, but that would require some additional polyfills\n        this._transport.ready.then(() =\u003e {\n            this._transport.createBidirectionalStream().then((stream) =\u003e {\n                const decoderStream = createPacketDecoderStream(Number.MAX_SAFE_INTEGER, this.socket.binaryType);\n                const reader = stream.readable.pipeThrough(decoderStream).getReader();\n                const encoderStream = createPacketEncoderStream();\n                encoderStream.readable.pipeTo(stream.writable);\n                this._writer = encoderStream.writable.getWriter();\n                const read = () =\u003e {\n                    reader\n                        .read()\n                        .then(({ done, value }) =\u003e {\n                        if (done) {\n                            return;\n                        }\n                        this.onPacket(value);\n                        read();\n                    })\n                        .catch((err) =\u003e {\n                    });\n                };\n                read();\n                const packet = { type: \"open\" };\n                if (this.query.sid) {\n                    packet.data = `{\"sid\":\"${this.query.sid}\"}`;\n                }\n                this._writer.write(packet).then(() =\u003e this.onOpen());\n            });\n        });\n    }\n    write(packets) {\n        this.writable = false;\n        for (let i = 0; i \u003c packets.length; i++) {\n            const packet = packets[i];\n            const lastPacket = i === packets.length - 1;\n            this._writer.write(packet).then(() =\u003e {\n                if (lastPacket) {\n                    nextTick(() =\u003e {\n                        this.writable = true;\n                        this.emitReserved(\"drain\");\n                    }, this.setTimeoutFn);\n                }\n            });\n        }\n    }\n    doClose() {\n        var _a;\n        (_a = this._transport) === null || _a === void 0 ? void 0 : _a.close();\n    }\n}\n","import { XHR } from \"./polling-xhr.node.js\";\nimport { WS } from \"./websocket.node.js\";\nimport { WT } from \"./webtransport.js\";\nexport const transports = {\n    websocket: WS,\n    webtransport: WT,\n    polling: XHR,\n};\n","// imported from https://github.com/galkn/parseuri\n/**\n * Parses a URI\n *\n * Note: we could also have used the built-in URL object, but it isn't supported on all platforms.\n *\n * See:\n * - https://developer.mozilla.org/en-US/docs/Web/API/URL\n * - https://caniuse.com/url\n * - https://www.rfc-editor.org/rfc/rfc3986#appendix-B\n *\n * History of the parse() method:\n * - first commit: https://github.com/socketio/socket.io-client/commit/4ee1d5d94b3906a9c052b459f1a818b15f38f91c\n * - export into its own module: https://github.com/socketio/engine.io-client/commit/de2c561e4564efeb78f1bdb1ba39ef81b2822cb3\n * - reimport: https://github.com/socketio/engine.io-client/commit/df32277c3f6d622eec5ed09f493cae3f3391d242\n *\n * @author Steven Levithan \u003cstevenlevithan.com\u003e (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    if (str.length \u003e 8000) {\n        throw \"URI too long\";\n    }\n    const src = str, b = str.indexOf('['), e = str.indexOf(']');\n    if (b != -1 \u0026\u0026 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 \u0026\u0026 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.slice(0, 1) == '/' || path.length === 0) {\n        names.splice(0, 1);\n    }\n    if (path.slice(-1) == '/') {\n        names.splice(names.length - 1, 1);\n    }\n    return names;\n}\nfunction queryKey(uri, query) {\n    const data = {};\n    query.replace(/(?:^|\u0026)([^\u0026=]*)=?([^\u0026]*)/g, function ($0, $1, $2) {\n        if ($1) {\n            data[$1] = $2;\n        }\n    });\n    return data;\n}\n","import { transports as DEFAULT_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\";\nimport { createCookieJar, defaultBinaryType, nextTick, } from \"./globals.node.js\";\nconst withEventListeners = typeof addEventListener === \"function\" \u0026\u0026\n    typeof removeEventListener === \"function\";\nconst OFFLINE_EVENT_LISTENERS = [];\nif (withEventListeners) {\n    // within a ServiceWorker, any event handler for the 'offline' event must be added on the initial evaluation of the\n    // script, so we create one single event listener here which will forward the event to the socket instances\n    addEventListener(\"offline\", () =\u003e {\n        OFFLINE_EVENT_LISTENERS.forEach((listener) =\u003e listener());\n    }, false);\n}\n/**\n * This class provides a WebSocket-like interface to connect to an Engine.IO server. The connection will be established\n * with one of the available low-level transports, like HTTP long-polling, WebSocket or WebTransport.\n *\n * This class comes without upgrade mechanism, which means that it will keep the first low-level transport that\n * successfully establishes the connection.\n *\n * In order to allow tree-shaking, there are no transports included, that's why the `transports` option is mandatory.\n *\n * @example\n * import { SocketWithoutUpgrade, WebSocket } from \"engine.io-client\";\n *\n * const socket = new SocketWithoutUpgrade({\n *   transports: [WebSocket]\n * });\n *\n * socket.on(\"open\", () =\u003e {\n *   socket.send(\"hello\");\n * });\n *\n * @see SocketWithUpgrade\n * @see Socket\n */\nexport class SocketWithoutUpgrade extends Emitter {\n    /**\n     * Socket constructor.\n     *\n     * @param {String|Object} uri - uri or options\n     * @param {Object} opts - options\n     */\n    constructor(uri, opts) {\n        super();\n        this.binaryType = defaultBinaryType;\n        this.writeBuffer = [];\n        this._prevBufferLen = 0;\n        this._pingInterval = -1;\n        this._pingTimeout = -1;\n        this._maxPayload = -1;\n        /**\n         * The expiration timestamp of the {@link _pingTimeoutTimer} object is tracked, in case the timer is throttled and the\n         * callback is not fired on time. This can happen for example when a laptop is suspended or when a phone is locked.\n         */\n        this._pingTimeoutTime = Infinity;\n        if (uri \u0026\u0026 \"object\" === typeof uri) {\n            opts = uri;\n            uri = null;\n        }\n        if (uri) {\n            const parsedUri = parse(uri);\n            opts.hostname = parsedUri.host;\n            opts.secure =\n                parsedUri.protocol === \"https\" || parsedUri.protocol === \"wss\";\n            opts.port = parsedUri.port;\n            if (parsedUri.query)\n                opts.query = parsedUri.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\" \u0026\u0026 \"https:\" === location.protocol;\n        if (opts.hostname \u0026\u0026 !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\" \u0026\u0026 location.port\n                    ? location.port\n                    : this.secure\n                        ? \"443\"\n                        : \"80\");\n        this.transports = [];\n        this._transportsByName = {};\n        opts.transports.forEach((t) =\u003e {\n            const transportName = t.prototype.name;\n            this.transports.push(transportName);\n            this._transportsByName[transportName] = t;\n        });\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            addTrailingSlash: true,\n            rejectUnauthorized: true,\n            perMessageDeflate: {\n                threshold: 1024,\n            },\n            transportOptions: {},\n            closeOnBeforeunload: false,\n        }, opts);\n        this.opts.path =\n            this.opts.path.replace(/\\/$/, \"\") +\n                (this.opts.addTrailingSlash ? \"/\" : \"\");\n        if (typeof this.opts.query === \"string\") {\n            this.opts.query = decode(this.opts.query);\n        }\n        if (withEventListeners) {\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                this._beforeunloadEventListener = () =\u003e {\n                    if (this.transport) {\n                        // silently close the transport\n                        this.transport.removeAllListeners();\n                        this.transport.close();\n                    }\n                };\n                addEventListener(\"beforeunload\", this._beforeunloadEventListener, false);\n            }\n            if (this.hostname !== \"localhost\") {\n                this._offlineEventListener = () =\u003e {\n                    this._onClose(\"transport close\", {\n                        description: \"network connection lost\",\n                    });\n                };\n                OFFLINE_EVENT_LISTENERS.push(this._offlineEventListener);\n            }\n        }\n        if (this.opts.withCredentials) {\n            this._cookieJar = createCookieJar();\n        }\n        this._open();\n    }\n    /**\n     * Creates transport of the given type.\n     *\n     * @param {String} name - transport name\n     * @return {Transport}\n     * @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, {\n            query,\n            socket: this,\n            hostname: this.hostname,\n            secure: this.secure,\n            port: this.port,\n        }, this.opts.transportOptions[name]);\n        return new this._transportsByName[name](opts);\n    }\n    /**\n     * Initializes transport to use and starts probe.\n     *\n     * @private\n     */\n    _open() {\n        if (this.transports.length === 0) {\n            // Emit error on next tick so it can be listened to\n            this.setTimeoutFn(() =\u003e {\n                this.emitReserved(\"error\", \"No transports available\");\n            }, 0);\n            return;\n        }\n        const transportName = this.opts.rememberUpgrade \u0026\u0026\n            SocketWithoutUpgrade.priorWebsocketSuccess \u0026\u0026\n            this.transports.indexOf(\"websocket\") !== -1\n            ? \"websocket\"\n            : this.transports[0];\n        this.readyState = \"opening\";\n        const transport = this.createTransport(transportName);\n        transport.open();\n        this.setTransport(transport);\n    }\n    /**\n     * Sets the current transport. Disables the existing one (if any).\n     *\n     * @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) =\u003e this._onClose(\"transport close\", reason));\n    }\n    /**\n     * Called when connection is deemed open.\n     *\n     * @private\n     */\n    onOpen() {\n        this.readyState = \"open\";\n        SocketWithoutUpgrade.priorWebsocketSuccess =\n            \"websocket\" === this.transport.name;\n        this.emitReserved(\"open\");\n        this.flush();\n    }\n    /**\n     * Handles a packet.\n     *\n     * @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._sendPacket(\"pong\");\n                    this.emitReserved(\"ping\");\n                    this.emitReserved(\"pong\");\n                    this._resetPingTimeout();\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     * @private\n     */\n    onHandshake(data) {\n        this.emitReserved(\"handshake\", data);\n        this.id = data.sid;\n        this.transport.query.sid = data.sid;\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     * @private\n     */\n    _resetPingTimeout() {\n        this.clearTimeoutFn(this._pingTimeoutTimer);\n        const delay = this._pingInterval + this._pingTimeout;\n        this._pingTimeoutTime = Date.now() + delay;\n        this._pingTimeoutTimer = this.setTimeoutFn(() =\u003e {\n            this._onClose(\"ping timeout\");\n        }, delay);\n        if (this.opts.autoUnref) {\n            this._pingTimeoutTimer.unref();\n        }\n    }\n    /**\n     * Called on `drain` event\n     *\n     * @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     * @private\n     */\n    flush() {\n        if (\"closed\" !== this.readyState \u0026\u0026\n            this.transport.writable \u0026\u0026\n            !this.upgrading \u0026\u0026\n            this.writeBuffer.length) {\n            const packets = this._getWritablePackets();\n            this.transport.send(packets);\n            // keep track of current length of writeBuffer\n            // splice writeBuffer and callbackBuffer on `drain`\n            this._prevBufferLen = packets.length;\n            this.emitReserved(\"flush\");\n        }\n    }\n    /**\n     * Ensure the encoded size of the writeBuffer is below the maxPayload value sent by the server (only for HTTP\n     * long-polling)\n     *\n     * @private\n     */\n    _getWritablePackets() {\n        const shouldCheckPayloadSize = this._maxPayload \u0026\u0026\n            this.transport.name === \"polling\" \u0026\u0026\n            this.writeBuffer.length \u003e 1;\n        if (!shouldCheckPayloadSize) {\n            return this.writeBuffer;\n        }\n        let payloadSize = 1; // first packet type\n        for (let i = 0; i \u003c this.writeBuffer.length; i++) {\n            const data = this.writeBuffer[i].data;\n            if (data) {\n                payloadSize += byteLength(data);\n            }\n            if (i \u003e 0 \u0026\u0026 payloadSize \u003e this._maxPayload) {\n                return this.writeBuffer.slice(0, i);\n            }\n            payloadSize += 2; // separator + packet type\n        }\n        return this.writeBuffer;\n    }\n    /**\n     * Checks whether the heartbeat timer has expired but the socket has not yet been notified.\n     *\n     * Note: this method is private for now because it does not really fit the WebSocket API, but if we put it in the\n     * `write()` method then the message would not be buffered by the Socket.IO client.\n     *\n     * @return {boolean}\n     * @private\n     */\n    /* private */ _hasPingExpired() {\n        if (!this._pingTimeoutTime)\n            return true;\n        const hasExpired = Date.now() \u003e this._pingTimeoutTime;\n        if (hasExpired) {\n            this._pingTimeoutTime = 0;\n            nextTick(() =\u003e {\n                this._onClose(\"ping timeout\");\n            }, this.setTimeoutFn);\n        }\n        return hasExpired;\n    }\n    /**\n     * Sends a message.\n     *\n     * @param {String} msg - message.\n     * @param {Object} options.\n     * @param {Function} fn - callback function.\n     * @return {Socket} for chaining.\n     */\n    write(msg, options, fn) {\n        this._sendPacket(\"message\", msg, options, fn);\n        return this;\n    }\n    /**\n     * Sends a message. Alias of {@link Socket#write}.\n     *\n     * @param {String} msg - message.\n     * @param {Object} options.\n     * @param {Function} fn - callback function.\n     * @return {Socket} for chaining.\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} type: packet type.\n     * @param {String} data.\n     * @param {Object} options.\n     * @param {Function} fn - callback function.\n     * @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    close() {\n        const close = () =\u003e {\n            this._onClose(\"forced close\");\n            this.transport.close();\n        };\n        const cleanupAndClose = () =\u003e {\n            this.off(\"upgrade\", cleanupAndClose);\n            this.off(\"upgradeError\", cleanupAndClose);\n            close();\n        };\n        const waitForUpgrade = () =\u003e {\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\", () =\u003e {\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     * @private\n     */\n    _onError(err) {\n        SocketWithoutUpgrade.priorWebsocketSuccess = false;\n        if (this.opts.tryAllTransports \u0026\u0026\n            this.transports.length \u003e 1 \u0026\u0026\n            this.readyState === \"opening\") {\n            this.transports.shift();\n            return this._open();\n        }\n        this.emitReserved(\"error\", err);\n        this._onClose(\"transport error\", err);\n    }\n    /**\n     * Called upon transport close.\n     *\n     * @private\n     */\n    _onClose(reason, description) {\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 (withEventListeners) {\n                if (this._beforeunloadEventListener) {\n                    removeEventListener(\"beforeunload\", this._beforeunloadEventListener, false);\n                }\n                if (this._offlineEventListener) {\n                    const i = OFFLINE_EVENT_LISTENERS.indexOf(this._offlineEventListener);\n                    if (i !== -1) {\n                        OFFLINE_EVENT_LISTENERS.splice(i, 1);\n                    }\n                }\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, description);\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}\nSocketWithoutUpgrade.protocol = protocol;\n/**\n * This class provides a WebSocket-like interface to connect to an Engine.IO server. The connection will be established\n * with one of the available low-level transports, like HTTP long-polling, WebSocket or WebTransport.\n *\n * This class comes with an upgrade mechanism, which means that once the connection is established with the first\n * low-level transport, it will try to upgrade to a better transport.\n *\n * In order to allow tree-shaking, there are no transports included, that's why the `transports` option is mandatory.\n *\n * @example\n * import { SocketWithUpgrade, WebSocket } from \"engine.io-client\";\n *\n * const socket = new SocketWithUpgrade({\n *   transports: [WebSocket]\n * });\n *\n * socket.on(\"open\", () =\u003e {\n *   socket.send(\"hello\");\n * });\n *\n * @see SocketWithoutUpgrade\n * @see Socket\n */\nexport class SocketWithUpgrade extends SocketWithoutUpgrade {\n    constructor() {\n        super(...arguments);\n        this._upgrades = [];\n    }\n    onOpen() {\n        super.onOpen();\n        if (\"open\" === this.readyState \u0026\u0026 this.opts.upgrade) {\n            for (let i = 0; i \u003c this._upgrades.length; i++) {\n                this._probe(this._upgrades[i]);\n            }\n        }\n    }\n    /**\n     * Probes a transport.\n     *\n     * @param {String} name - transport name\n     * @private\n     */\n    _probe(name) {\n        let transport = this.createTransport(name);\n        let failed = false;\n        SocketWithoutUpgrade.priorWebsocketSuccess = false;\n        const onTransportOpen = () =\u003e {\n            if (failed)\n                return;\n            transport.send([{ type: \"ping\", data: \"probe\" }]);\n            transport.once(\"packet\", (msg) =\u003e {\n                if (failed)\n                    return;\n                if (\"pong\" === msg.type \u0026\u0026 \"probe\" === msg.data) {\n                    this.upgrading = true;\n                    this.emitReserved(\"upgrading\", transport);\n                    if (!transport)\n                        return;\n                    SocketWithoutUpgrade.priorWebsocketSuccess =\n                        \"websocket\" === transport.name;\n                    this.transport.pause(() =\u003e {\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) =\u003e {\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 \u0026\u0026 to.name !== transport.name) {\n                freezeTransport();\n            }\n        }\n        // Remove all listeners on the transport and on self\n        const cleanup = () =\u003e {\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        if (this._upgrades.indexOf(\"webtransport\") !== -1 \u0026\u0026\n            name !== \"webtransport\") {\n            // favor WebTransport\n            this.setTimeoutFn(() =\u003e {\n                if (!failed) {\n                    transport.open();\n                }\n            }, 200);\n        }\n        else {\n            transport.open();\n        }\n    }\n    onHandshake(data) {\n        this._upgrades = this._filterUpgrades(data.upgrades);\n        super.onHandshake(data);\n    }\n    /**\n     * Filters upgrades, returning only those matching client transports.\n     *\n     * @param {Array} upgrades - server upgrades\n     * @private\n     */\n    _filterUpgrades(upgrades) {\n        const filteredUpgrades = [];\n        for (let i = 0; i \u003c upgrades.length; i++) {\n            if (~this.transports.indexOf(upgrades[i]))\n                filteredUpgrades.push(upgrades[i]);\n        }\n        return filteredUpgrades;\n    }\n}\n/**\n * This class provides a WebSocket-like interface to connect to an Engine.IO server. The connection will be established\n * with one of the available low-level transports, like HTTP long-polling, WebSocket or WebTransport.\n *\n * This class comes with an upgrade mechanism, which means that once the connection is established with the first\n * low-level transport, it will try to upgrade to a better transport.\n *\n * @example\n * import { Socket } from \"engine.io-client\";\n *\n * const socket = new Socket();\n *\n * socket.on(\"open\", () =\u003e {\n *   socket.send(\"hello\");\n * });\n *\n * @see SocketWithoutUpgrade\n * @see SocketWithUpgrade\n */\nexport class Socket extends SocketWithUpgrade {\n    constructor(uri, opts = {}) {\n        const o = typeof uri === \"object\" ? uri : opts;\n        if (!o.transports ||\n            (o.transports \u0026\u0026 typeof o.transports[0] === \"string\")) {\n            o.transports = (o.transports || [\"polling\", \"websocket\", \"webtransport\"])\n                .map((transportName) =\u003e DEFAULT_TRANSPORTS[transportName])\n                .filter((t) =\u003e !!t);\n        }\n        super(uri, o);\n    }\n}\n","import { Polling } from \"./polling.js\";\n/**\n * HTTP long-polling based on the built-in `fetch()` method.\n *\n * Usage: browser, Node.js (since v18), Deno, Bun\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/fetch\n * @see https://caniuse.com/fetch\n * @see https://nodejs.org/api/globals.html#fetch\n */\nexport class Fetch extends Polling {\n    doPoll() {\n        this._fetch()\n            .then((res) =\u003e {\n            if (!res.ok) {\n                return this.onError(\"fetch read error\", res.status, res);\n            }\n            res.text().then((data) =\u003e this.onData(data));\n        })\n            .catch((err) =\u003e {\n            this.onError(\"fetch read error\", err);\n        });\n    }\n    doWrite(data, callback) {\n        this._fetch(data)\n            .then((res) =\u003e {\n            if (!res.ok) {\n                return this.onError(\"fetch write error\", res.status, res);\n            }\n            callback();\n        })\n            .catch((err) =\u003e {\n            this.onError(\"fetch write error\", err);\n        });\n    }\n    _fetch(data) {\n        var _a;\n        const isPost = data !== undefined;\n        const headers = new Headers(this.opts.extraHeaders);\n        if (isPost) {\n            headers.set(\"content-type\", \"text/plain;charset=UTF-8\");\n        }\n        (_a = this.socket._cookieJar) === null || _a === void 0 ? void 0 : _a.appendCookies(headers);\n        return fetch(this.uri(), {\n            method: isPost ? \"POST\" : \"GET\",\n            body: isPost ? data : null,\n            headers,\n            credentials: this.opts.withCredentials ? \"include\" : \"omit\",\n        }).then((res) =\u003e {\n            var _a;\n            // @ts-ignore getSetCookie() was added in Node.js v19.7.0\n            (_a = this.socket._cookieJar) === null || _a === void 0 ? void 0 : _a.parseCookies(res.headers.getSetCookie());\n            return res;\n        });\n    }\n}\n","import { Socket } from \"./socket.js\";\nexport { Socket };\nexport { SocketWithoutUpgrade, SocketWithUpgrade, } from \"./socket.js\";\nexport const protocol = Socket.protocol;\nexport { Transport, TransportError } from \"./transport.js\";\nexport { transports } from \"./transports/index.js\";\nexport { installTimerFunctions } from \"./util.js\";\nexport { parse } from \"./contrib/parseuri.js\";\nexport { nextTick } from \"./globals.node.js\";\nexport { Fetch } from \"./transports/polling-fetch.js\";\nexport { XHR as NodeXHR } from \"./transports/polling-xhr.node.js\";\nexport { XHR } from \"./transports/polling-xhr.js\";\nexport { WS as NodeWebSocket } from \"./transports/websocket.node.js\";\nexport { WS as WebSocket } from \"./transports/websocket.js\";\nexport { WT as WebTransport } from \"./transports/webtransport.js\";\n"],"version":3}