@brainfish-ai/web-tracker/dist/tracker.es.js

Brainfish Tracker for Web

var __defProp = Object.defineProperty;
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var __publicField = (obj, key, value2) => __defNormalProp(obj, typeof key !== "symbol" ? key + "" : key, value2);
const PACKET_TYPES = /* @__PURE__ */ Object.create(null);
PACKET_TYPES["open"] = "0";
PACKET_TYPES["close"] = "1";
PACKET_TYPES["ping"] = "2";
PACKET_TYPES["pong"] = "3";
PACKET_TYPES["message"] = "4";
PACKET_TYPES["upgrade"] = "5";
PACKET_TYPES["noop"] = "6";
const PACKET_TYPES_REVERSE = /* @__PURE__ */ Object.create(null);
Object.keys(PACKET_TYPES).forEach((key) => {
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});
const ERROR_PACKET = { type: "error", data: "parser error" };
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const withNativeArrayBuffer$2 = typeof ArrayBuffer === "function";
const isView$1 = (obj) => {
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};
const encodePacket = ({ type, data }, supportsBinary, callback) => {
  if (withNativeBlob$1 && data instanceof Blob) {
    if (supportsBinary) {
      return callback(data);
    } else {
      return encodeBlobAsBase64(data, callback);
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    if (supportsBinary) {
      return callback(data);
    } else {
      return encodeBlobAsBase64(new Blob([data]), callback);
    }
  }
  return callback(PACKET_TYPES[type] + (data || ""));
};
const encodeBlobAsBase64 = (data, callback) => {
  const fileReader = new FileReader();
  fileReader.onload = function() {
    const content = fileReader.result.split(",")[1];
    callback("b" + (content || ""));
  };
  return fileReader.readAsDataURL(data);
};
function toArray$1(data) {
  if (data instanceof Uint8Array) {
    return data;
  } else if (data instanceof ArrayBuffer) {
    return new Uint8Array(data);
  } else {
    return new Uint8Array(data.buffer, data.byteOffset, data.byteLength);
  }
}
let TEXT_ENCODER;
function encodePacketToBinary(packet, callback) {
  if (withNativeBlob$1 && packet.data instanceof Blob) {
    return packet.data.arrayBuffer().then(toArray$1).then(callback);
  } else if (withNativeArrayBuffer$2 && (packet.data instanceof ArrayBuffer || isView$1(packet.data))) {
    return callback(toArray$1(packet.data));
  }
  encodePacket(packet, false, (encoded) => {
    if (!TEXT_ENCODER) {
      TEXT_ENCODER = new TextEncoder();
    }
    callback(TEXT_ENCODER.encode(encoded));
  });
}
const chars$2 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
const lookup$3 = typeof Uint8Array === "undefined" ? [] : new Uint8Array(256);
for (let i = 0; i < chars$2.length; i++) {
  lookup$3[chars$2.charCodeAt(i)] = i;
}
const decode$1 = (base64) => {
  let bufferLength = base64.length * 0.75, len = base64.length, i, p = 0, encoded1, encoded2, encoded3, encoded4;
  if (base64[base64.length - 1] === "=") {
    bufferLength--;
    if (base64[base64.length - 2] === "=") {
      bufferLength--;
    }
  }
  const arraybuffer = new ArrayBuffer(bufferLength), bytes = new Uint8Array(arraybuffer);
  for (i = 0; i < len; i += 4) {
    encoded1 = lookup$3[base64.charCodeAt(i)];
    encoded2 = lookup$3[base64.charCodeAt(i + 1)];
    encoded3 = lookup$3[base64.charCodeAt(i + 2)];
    encoded4 = lookup$3[base64.charCodeAt(i + 3)];
    bytes[p++] = encoded1 << 2 | encoded2 >> 4;
    bytes[p++] = (encoded2 & 15) << 4 | encoded3 >> 2;
    bytes[p++] = (encoded3 & 3) << 6 | encoded4 & 63;
  }
  return arraybuffer;
};
const withNativeArrayBuffer$1 = typeof ArrayBuffer === "function";
const decodePacket = (encodedPacket, binaryType) => {
  if (typeof encodedPacket !== "string") {
    return {
      type: "message",
      data: mapBinary(encodedPacket, binaryType)
    };
  }
  const type = encodedPacket.charAt(0);
  if (type === "b") {
    return {
      type: "message",
      data: decodeBase64Packet(encodedPacket.substring(1), binaryType)
    };
  }
  const packetType = PACKET_TYPES_REVERSE[type];
  if (!packetType) {
    return ERROR_PACKET;
  }
  return encodedPacket.length > 1 ? {
    type: PACKET_TYPES_REVERSE[type],
    data: encodedPacket.substring(1)
  } : {
    type: PACKET_TYPES_REVERSE[type]
  };
};
const decodeBase64Packet = (data, binaryType) => {
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    const decoded = decode$1(data);
    return mapBinary(decoded, binaryType);
  } else {
    return { base64: true, data };
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};
const mapBinary = (data, binaryType) => {
  switch (binaryType) {
    case "blob":
      if (data instanceof Blob) {
        return data;
      } else {
        return new Blob([data]);
      }
    case "arraybuffer":
    default:
      if (data instanceof ArrayBuffer) {
        return data;
      } else {
        return data.buffer;
      }
  }
};
const SEPARATOR = String.fromCharCode(30);
const encodePayload = (packets, callback) => {
  const length = packets.length;
  const encodedPackets = new Array(length);
  let count = 0;
  packets.forEach((packet, i) => {
    encodePacket(packet, false, (encodedPacket) => {
      encodedPackets[i] = encodedPacket;
      if (++count === length) {
        callback(encodedPackets.join(SEPARATOR));
      }
    });
  });
};
const decodePayload = (encodedPayload, binaryType) => {
  const encodedPackets = encodedPayload.split(SEPARATOR);
  const packets = [];
  for (let i = 0; i < encodedPackets.length; i++) {
    const decodedPacket = decodePacket(encodedPackets[i], binaryType);
    packets.push(decodedPacket);
    if (decodedPacket.type === "error") {
      break;
    }
  }
  return packets;
};
function createPacketEncoderStream() {
  return new TransformStream({
    transform(packet, controller) {
      encodePacketToBinary(packet, (encodedPacket) => {
        const payloadLength = encodedPacket.length;
        let header;
        if (payloadLength < 126) {
          header = new Uint8Array(1);
          new DataView(header.buffer).setUint8(0, payloadLength);
        } else if (payloadLength < 65536) {
          header = new Uint8Array(3);
          const view = new DataView(header.buffer);
          view.setUint8(0, 126);
          view.setUint16(1, payloadLength);
        } else {
          header = new Uint8Array(9);
          const view = new DataView(header.buffer);
          view.setUint8(0, 127);
          view.setBigUint64(1, BigInt(payloadLength));
        }
        if (packet.data && typeof packet.data !== "string") {
          header[0] |= 128;
        }
        controller.enqueue(header);
        controller.enqueue(encodedPacket);
      });
    }
  });
}
let TEXT_DECODER;
function totalLength(chunks) {
  return chunks.reduce((acc, chunk) => acc + chunk.length, 0);
}
function concatChunks(chunks, size) {
  if (chunks[0].length === size) {
    return chunks.shift();
  }
  const buffer = new Uint8Array(size);
  let j = 0;
  for (let i = 0; i < size; i++) {
    buffer[i] = chunks[0][j++];
    if (j === chunks[0].length) {
      chunks.shift();
      j = 0;
    }
  }
  if (chunks.length && j < chunks[0].length) {
    chunks[0] = chunks[0].slice(j);
  }
  return buffer;
}
function createPacketDecoderStream(maxPayload, binaryType) {
  if (!TEXT_DECODER) {
    TEXT_DECODER = new TextDecoder();
  }
  const chunks = [];
  let state = 0;
  let expectedLength = -1;
  let isBinary2 = false;
  return new TransformStream({
    transform(chunk, controller) {
      chunks.push(chunk);
      while (true) {
        if (state === 0) {
          if (totalLength(chunks) < 1) {
            break;
          }
          const header = concatChunks(chunks, 1);
          isBinary2 = (header[0] & 128) === 128;
          expectedLength = header[0] & 127;
          if (expectedLength < 126) {
            state = 3;
          } else if (expectedLength === 126) {
            state = 1;
          } else {
            state = 2;
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        } else if (state === 1) {
          if (totalLength(chunks) < 2) {
            break;
          }
          const headerArray = concatChunks(chunks, 2);
          expectedLength = new DataView(headerArray.buffer, headerArray.byteOffset, headerArray.length).getUint16(0);
          state = 3;
        } else if (state === 2) {
          if (totalLength(chunks) < 8) {
            break;
          }
          const headerArray = concatChunks(chunks, 8);
          const view = new DataView(headerArray.buffer, headerArray.byteOffset, headerArray.length);
          const n2 = view.getUint32(0);
          if (n2 > Math.pow(2, 53 - 32) - 1) {
            controller.enqueue(ERROR_PACKET);
            break;
          }
          expectedLength = n2 * Math.pow(2, 32) + view.getUint32(4);
          state = 3;
        } else {
          if (totalLength(chunks) < expectedLength) {
            break;
          }
          const data = concatChunks(chunks, expectedLength);
          controller.enqueue(decodePacket(isBinary2 ? data : TEXT_DECODER.decode(data), binaryType));
          state = 0;
        }
        if (expectedLength === 0 || expectedLength > maxPayload) {
          controller.enqueue(ERROR_PACKET);
          break;
        }
      }
    }
  });
}
const protocol$1 = 4;
function Emitter(obj) {
  if (obj) return mixin(obj);
}
function mixin(obj) {
  for (var key in Emitter.prototype) {
    obj[key] = Emitter.prototype[key];
  }
  return obj;
}
Emitter.prototype.on = Emitter.prototype.addEventListener = function(event, fn) {
  this._callbacks = this._callbacks || {};
  (this._callbacks["$" + event] = this._callbacks["$" + event] || []).push(fn);
  return this;
};
Emitter.prototype.once = function(event, fn) {
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    fn.apply(this, arguments);
  }
  on2.fn = fn;
  this.on(event, on2);
  return this;
};
Emitter.prototype.off = Emitter.prototype.removeListener = Emitter.prototype.removeAllListeners = Emitter.prototype.removeEventListener = function(event, fn) {
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  if (0 == arguments.length) {
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};
Emitter.prototype.emit = function(event) {
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  var args = new Array(arguments.length - 1), callbacks = this._callbacks["$" + event];
  for (var i = 1; i < arguments.length; i++) {
    args[i - 1] = arguments[i];
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  if (callbacks) {
    callbacks = callbacks.slice(0);
    for (var i = 0, len = callbacks.length; i < len; ++i) {
      callbacks[i].apply(this, args);
    }
  }
  return this;
};
Emitter.prototype.emitReserved = Emitter.prototype.emit;
Emitter.prototype.listeners = function(event) {
  this._callbacks = this._callbacks || {};
  return this._callbacks["$" + event] || [];
};
Emitter.prototype.hasListeners = function(event) {
  return !!this.listeners(event).length;
};
const nextTick = (() => {
  const isPromiseAvailable = typeof Promise === "function" && typeof Promise.resolve === "function";
  if (isPromiseAvailable) {
    return (cb) => Promise.resolve().then(cb);
  } else {
    return (cb, setTimeoutFn) => setTimeoutFn(cb, 0);
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})();
const globalThisShim = (() => {
  if (typeof self !== "undefined") {
    return self;
  } else if (typeof window !== "undefined") {
    return window;
  } else {
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})();
const defaultBinaryType = "arraybuffer";
function createCookieJar() {
}
function pick(obj, ...attr) {
  return attr.reduce((acc, k) => {
    if (obj.hasOwnProperty(k)) {
      acc[k] = obj[k];
    }
    return acc;
  }, {});
}
const NATIVE_SET_TIMEOUT = globalThisShim.setTimeout;
const NATIVE_CLEAR_TIMEOUT = globalThisShim.clearTimeout;
function installTimerFunctions(obj, opts) {
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}
const BASE64_OVERHEAD = 1.33;
function byteLength(obj) {
  if (typeof obj === "string") {
    return utf8Length(obj);
  }
  return Math.ceil((obj.byteLength || obj.size) * BASE64_OVERHEAD);
}
function utf8Length(str) {
  let c = 0, length = 0;
  for (let i = 0, l = str.length; i < l; i++) {
    c = str.charCodeAt(i);
    if (c < 128) {
      length += 1;
    } else if (c < 2048) {
      length += 2;
    } else if (c < 55296 || c >= 57344) {
      length += 3;
    } else {
      i++;
      length += 4;
    }
  }
  return length;
}
function randomString() {
  return Date.now().toString(36).substring(3) + Math.random().toString(36).substring(2, 5);
}
function encode$1(obj) {
  let str = "";
  for (let i in obj) {
    if (obj.hasOwnProperty(i)) {
      if (str.length)
        str += "&";
      str += encodeURIComponent(i) + "=" + encodeURIComponent(obj[i]);
    }
  }
  return str;
}
function decode(qs) {
  let qry = {};
  let pairs = qs.split("&");
  for (let i = 0, l = pairs.length; i < l; i++) {
    let pair = pairs[i].split("=");
    qry[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1]);
  }
  return qry;
}
class TransportError extends Error {
  constructor(reason, description, context) {
    super(reason);
    this.description = description;
    this.context = context;
    this.type = "TransportError";
  }
}
class Transport extends Emitter {
  /**
   * Transport abstract constructor.
   *
   * @param {Object} opts - options
   * @protected
   */
  constructor(opts) {
    super();
    this.writable = false;
    installTimerFunctions(this, opts);
    this.opts = opts;
    this.query = opts.query;
    this.socket = opts.socket;
    this.supportsBinary = !opts.forceBase64;
  }
  /**
   * Emits an error.
   *
   * @param {String} reason
   * @param description
   * @param context - the error context
   * @return {Transport} for chaining
   * @protected
   */
  onError(reason, description, context) {
    super.emitReserved("error", new TransportError(reason, description, context));
    return this;
  }
  /**
   * Opens the transport.
   */
  open() {
    this.readyState = "opening";
    this.doOpen();
    return this;
  }
  /**
   * Closes the transport.
   */
  close() {
    if (this.readyState === "opening" || this.readyState === "open") {
      this.doClose();
      this.onClose();
    }
    return this;
  }
  /**
   * Sends multiple packets.
   *
   * @param {Array} packets
   */
  send(packets) {
    if (this.readyState === "open") {
      this.write(packets);
    }
  }
  /**
   * Called upon open
   *
   * @protected
   */
  onOpen() {
    this.readyState = "open";
    this.writable = true;
    super.emitReserved("open");
  }
  /**
   * Called with data.
   *
   * @param {String} data
   * @protected
   */
  onData(data) {
    const packet = decodePacket(data, this.socket.binaryType);
    this.onPacket(packet);
  }
  /**
   * Called with a decoded packet.
   *
   * @protected
   */
  onPacket(packet) {
    super.emitReserved("packet", packet);
  }
  /**
   * Called upon close.
   *
   * @protected
   */
  onClose(details) {
    this.readyState = "closed";
    super.emitReserved("close", details);
  }
  /**
   * Pauses the transport, in order not to lose packets during an upgrade.
   *
   * @param onPause
   */
  pause(onPause) {
  }
  createUri(schema, query = {}) {
    return schema + "://" + this._hostname() + this._port() + this.opts.path + this._query(query);
  }
  _hostname() {
    const hostname = this.opts.hostname;
    return hostname.indexOf(":") === -1 ? hostname : "[" + hostname + "]";
  }
  _port() {
    if (this.opts.port && (this.opts.secure && Number(this.opts.port !== 443) || !this.opts.secure && Number(this.opts.port) !== 80)) {
      return ":" + this.opts.port;
    } else {
      return "";
    }
  }
  _query(query) {
    const encodedQuery = encode$1(query);
    return encodedQuery.length ? "?" + encodedQuery : "";
  }
}
class Polling extends Transport {
  constructor() {
    super(...arguments);
    this._polling = false;
  }
  get name() {
    return "polling";
  }
  /**
   * Opens the socket (triggers polling). We write a PING message to determine
   * when the transport is open.
   *
   * @protected
   */
  doOpen() {
    this._poll();
  }
  /**
   * Pauses polling.
   *
   * @param {Function} onPause - callback upon buffers are flushed and transport is paused
   * @package
   */
  pause(onPause) {
    this.readyState = "pausing";
    const pause = () => {
      this.readyState = "paused";
      onPause();
    };
    if (this._polling || !this.writable) {
      let total = 0;
      if (this._polling) {
        total++;
        this.once("pollComplete", function() {
          --total || pause();
        });
      }
      if (!this.writable) {
        total++;
        this.once("drain", function() {
          --total || pause();
        });
      }
    } else {
      pause();
    }
  }
  /**
   * Starts polling cycle.
   *
   * @private
   */
  _poll() {
    this._polling = true;
    this.doPoll();
    this.emitReserved("poll");
  }
  /**
   * Overloads onData to detect payloads.
   *
   * @protected
   */
  onData(data) {
    const callback = (packet) => {
      if ("opening" === this.readyState && packet.type === "open") {
        this.onOpen();
      }
      if ("close" === packet.type) {
        this.onClose({ description: "transport closed by the server" });
        return false;
      }
      this.onPacket(packet);
    };
    decodePayload(data, this.socket.binaryType).forEach(callback);
    if ("closed" !== this.readyState) {
      this._polling = false;
      this.emitReserved("pollComplete");
      if ("open" === this.readyState) {
        this._poll();
      }
    }
  }
  /**
   * For polling, send a close packet.
   *
   * @protected
   */
  doClose() {
    const close = () => {
      this.write([{ type: "close" }]);
    };
    if ("open" === this.readyState) {
      close();
    } else {
      this.once("open", close);
    }
  }
  /**
   * Writes a packets payload.
   *
   * @param {Array} packets - data packets
   * @protected
   */
  write(packets) {
    this.writable = false;
    encodePayload(packets, (data) => {
      this.doWrite(data, () => {
        this.writable = true;
        this.emitReserved("drain");
      });
    });
  }
  /**
   * Generates uri for connection.
   *
   * @private
   */
  uri() {
    const schema = this.opts.secure ? "https" : "http";
    const query = this.query || {};
    if (false !== this.opts.timestampRequests) {
      query[this.opts.timestampParam] = randomString();
    }
    if (!this.supportsBinary && !query.sid) {
      query.b64 = 1;
    }
    return this.createUri(schema, query);
  }
}
let value = false;
try {
  value = typeof XMLHttpRequest !== "undefined" && "withCredentials" in new XMLHttpRequest();
} catch (err) {
}
const hasCORS = value;
function empty() {
}
class BaseXHR extends Polling {
  /**
   * XHR Polling constructor.
   *
   * @param {Object} opts
   * @package
   */
  constructor(opts) {
    super(opts);
    if (typeof location !== "undefined") {
      const isSSL = "https:" === location.protocol;
      let port = location.port;
      if (!port) {
        port = isSSL ? "443" : "80";
      }
      this.xd = typeof location !== "undefined" && opts.hostname !== location.hostname || port !== opts.port;
    }
  }
  /**
   * Sends data.
   *
   * @param {String} data to send.
   * @param {Function} called upon flush.
   * @private
   */
  doWrite(data, fn) {
    const req = this.request({
      method: "POST",
      data
    });
    req.on("success", fn);
    req.on("error", (xhrStatus, context) => {
      this.onError("xhr post error", xhrStatus, context);
    });
  }
  /**
   * Starts a poll cycle.
   *
   * @private
   */
  doPoll() {
    const req = this.request();
    req.on("data", this.onData.bind(this));
    req.on("error", (xhrStatus, context) => {
      this.onError("xhr poll error", xhrStatus, context);
    });
    this.pollXhr = req;
  }
}
class Request extends Emitter {
  /**
   * Request constructor
   *
   * @param {Object} options
   * @package
   */
  constructor(createRequest, uri, opts) {
    super();
    this.createRequest = createRequest;
    installTimerFunctions(this, opts);
    this._opts = opts;
    this._method = opts.method || "GET";
    this._uri = uri;
    this._data = void 0 !== opts.data ? opts.data : null;
    this._create();
  }
  /**
   * Creates the XHR object and sends the request.
   *
   * @private
   */
  _create() {
    var _a2;
    const opts = pick(this._opts, "agent", "pfx", "key", "passphrase", "cert", "ca", "ciphers", "rejectUnauthorized", "autoUnref");
    opts.xdomain = !!this._opts.xd;
    const xhr = this._xhr = this.createRequest(opts);
    try {
      xhr.open(this._method, this._uri, true);
      try {
        if (this._opts.extraHeaders) {
          xhr.setDisableHeaderCheck && xhr.setDisableHeaderCheck(true);
          for (let i in this._opts.extraHeaders) {
            if (this._opts.extraHeaders.hasOwnProperty(i)) {
              xhr.setRequestHeader(i, this._opts.extraHeaders[i]);
            }
          }
        }
      } catch (e) {
      }
      if ("POST" === this._method) {
        try {
          xhr.setRequestHeader("Content-type", "text/plain;charset=UTF-8");
        } catch (e) {
        }
      }
      try {
        xhr.setRequestHeader("Accept", "*/*");
      } catch (e) {
      }
      (_a2 = this._opts.cookieJar) === null || _a2 === void 0 ? void 0 : _a2.addCookies(xhr);
      if ("withCredentials" in xhr) {
        xhr.withCredentials = this._opts.withCredentials;
      }
      if (this._opts.requestTimeout) {
        xhr.timeout = this._opts.requestTimeout;
      }
      xhr.onreadystatechange = () => {
        var _a3;
        if (xhr.readyState === 3) {
          (_a3 = this._opts.cookieJar) === null || _a3 === void 0 ? void 0 : _a3.parseCookies(
            // @ts-ignore
            xhr.getResponseHeader("set-cookie")
          );
        }
        if (4 !== xhr.readyState)
          return;
        if (200 === xhr.status || 1223 === xhr.status) {
          this._onLoad();
        } else {
          this.setTimeoutFn(() => {
            this._onError(typeof xhr.status === "number" ? xhr.status : 0);
          }, 0);
        }
      };
      xhr.send(this._data);
    } catch (e) {
      this.setTimeoutFn(() => {
        this._onError(e);
      }, 0);
      return;
    }
    if (typeof document !== "undefined") {
      this._index = Request.requestsCount++;
      Request.requests[this._index] = this;
    }
  }
  /**
   * Called upon error.
   *
   * @private
   */
  _onError(err) {
    this.emitReserved("error", err, this._xhr);
    this._cleanup(true);
  }
  /**
   * Cleans up house.
   *
   * @private
   */
  _cleanup(fromError) {
    if ("undefined" === typeof this._xhr || null === this._xhr) {
      return;
    }
    this._xhr.onreadystatechange = empty;
    if (fromError) {
      try {
        this._xhr.abort();
      } catch (e) {
      }
    }
    if (typeof document !== "undefined") {
      delete Request.requests[this._index];
    }
    this._xhr = null;
  }
  /**
   * Called upon load.
   *
   * @private
   */
  _onLoad() {
    const data = this._xhr.responseText;
    if (data !== null) {
      this.emitReserved("data", data);
      this.emitReserved("success");
      this._cleanup();
    }
  }
  /**
   * Aborts the request.
   *
   * @package
   */
  abort() {
    this._cleanup();
  }
}
Request.requestsCount = 0;
Request.requests = {};
if (typeof document !== "undefined") {
  if (typeof attachEvent === "function") {
    attachEvent("onunload", unloadHandler);
  } else if (typeof addEventListener === "function") {
    const terminationEvent = "onpagehide" in globalThisShim ? "pagehide" : "unload";
    addEventListener(terminationEvent, unloadHandler, false);
  }
}
function unloadHandler() {
  for (let i in Request.requests) {
    if (Request.requests.hasOwnProperty(i)) {
      Request.requests[i].abort();
    }
  }
}
const hasXHR2 = function() {
  const xhr = newRequest({
    xdomain: false
  });
  return xhr && xhr.responseType !== null;
}();
class XHR extends BaseXHR {
  constructor(opts) {
    super(opts);
    const forceBase64 = opts && opts.forceBase64;
    this.supportsBinary = hasXHR2 && !forceBase64;
  }
  request(opts = {}) {
    Object.assign(opts, { xd: this.xd }, this.opts);
    return new Request(newRequest, this.uri(), opts);
  }
}
function newRequest(opts) {
  const xdomain = opts.xdomain;
  try {
    if ("undefined" !== typeof XMLHttpRequest && (!xdomain || hasCORS)) {
      return new XMLHttpRequest();
    }
  } catch (e) {
  }
  if (!xdomain) {
    try {
      return new globalThisShim[["Active"].concat("Object").join("X")]("Microsoft.XMLHTTP");
    } catch (e) {
    }
  }
}
const isReactNative = typeof navigator !== "undefined" && typeof navigator.product === "string" && navigator.product.toLowerCase() === "reactnative";
class BaseWS extends Transport {
  get name() {
    return "websocket";
  }
  doOpen() {
    const uri = this.uri();
    const protocols = this.opts.protocols;
    const opts = isReactNative ? {} : pick(this.opts, "agent", "perMessageDeflate", "pfx", "key", "passphrase", "cert", "ca", "ciphers", "rejectUnauthorized", "localAddress", "protocolVersion", "origin", "maxPayload", "family", "checkServerIdentity");
    if (this.opts.extraHeaders) {
      opts.headers = this.opts.extraHeaders;
    }
    try {
      this.ws = this.createSocket(uri, protocols, opts);
    } catch (err) {
      return this.emitReserved("error", err);
    }
    this.ws.binaryType = this.socket.binaryType;
    this.addEventListeners();
  }
  /**
   * Adds event listeners to the socket
   *
   * @private
   */
  addEventListeners() {
    this.ws.onopen = () => {
      if (this.opts.autoUnref) {
        this.ws._socket.unref();
      }
      this.onOpen();
    };
    this.ws.onclose = (closeEvent) => this.onClose({
      description: "websocket connection closed",
      context: closeEvent
    });
    this.ws.onmessage = (ev) => this.onData(ev.data);
    this.ws.onerror = (e) => this.onError("websocket error", e);
  }
  write(packets) {
    this.writable = false;
    for (let i = 0; i < packets.length; i++) {
      const packet = packets[i];
      const lastPacket = i === packets.length - 1;
      encodePacket(packet, this.supportsBinary, (data) => {
        try {
          this.doWrite(packet, data);
        } catch (e) {
        }
        if (lastPacket) {
          nextTick(() => {
            this.writable = true;
            this.emitReserved("drain");
          }, this.setTimeoutFn);
        }
      });
    }
  }
  doClose() {
    if (typeof this.ws !== "undefined") {
      this.ws.onerror = () => {
      };
      this.ws.close();
      this.ws = null;
    }
  }
  /**
   * Generates uri for connection.
   *
   * @private
   */
  uri() {
    const schema = this.opts.secure ? "wss" : "ws";
    const query = this.query || {};
    if (this.opts.timestampRequests) {
      query[this.opts.timestampParam] = randomString();
    }
    if (!this.supportsBinary) {
      query.b64 = 1;
    }
    return this.createUri(schema, query);
  }
}
const WebSocketCtor = globalThisShim.WebSocket || globalThisShim.MozWebSocket;
class WS extends BaseWS {
  createSocket(uri, protocols, opts) {
    return !isReactNative ? protocols ? new WebSocketCtor(uri, protocols) : new WebSocketCtor(uri) : new WebSocketCtor(uri, protocols, opts);
  }
  doWrite(_packet, data) {
    this.ws.send(data);
  }
}
class WT extends Transport {
  get name() {
    return "webtransport";
  }
  doOpen() {
    try {
      this._transport = new WebTransport(this.createUri("https"), this.opts.transportOptions[this.name]);
    } catch (err) {
      return this.emitReserved("error", err);
    }
    this._transport.closed.then(() => {
      this.onClose();
    }).catch((err) => {
      this.onError("webtransport error", err);
    });
    this._transport.ready.then(() => {
      this._transport.createBidirectionalStream().then((stream) => {
        const decoderStream = createPacketDecoderStream(Number.MAX_SAFE_INTEGER, this.socket.binaryType);
        const reader = stream.readable.pipeThrough(decoderStream).getReader();
        const encoderStream = createPacketEncoderStream();
        encoderStream.readable.pipeTo(stream.writable);
        this._writer = encoderStream.writable.getWriter();
        const read = () => {
          reader.read().then(({ done, value: value2 }) => {
            if (done) {
              return;
            }
            this.onPacket(value2);
            read();
          }).catch((err) => {
          });
        };
        read();
        const packet = { type: "open" };
        if (this.query.sid) {
          packet.data = `{"sid":"${this.query.sid}"}`;
        }
        this._writer.write(packet).then(() => this.onOpen());
      });
    });
  }
  write(packets) {
    this.writable = false;
    for (let i = 0; i < packets.length; i++) {
      const packet = packets[i];
      const lastPacket = i === packets.length - 1;
      this._writer.write(packet).then(() => {
        if (lastPacket) {
          nextTick(() => {
            this.writable = true;
            this.emitReserved("drain");
          }, this.setTimeoutFn);
        }
      });
    }
  }
  doClose() {
    var _a2;
    (_a2 = this._transport) === null || _a2 === void 0 ? void 0 : _a2.close();
  }
}
const transports = {
  websocket: WS,
  webtransport: WT,
  polling: XHR
};
const re = /^(?:(?![^:@\/?#]+:[^:@\/]*@)(http|https|ws|wss):\/\/)?((?:(([^:@\/?#]*)(?::([^:@\/?#]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;
const parts = [
  "source",
  "protocol",
  "authority",
  "userInfo",
  "user",
  "password",
  "host",
  "port",
  "relative",
  "path",
  "directory",
  "file",
  "query",
  "anchor"
];
function parse$8(str) {
  if (str.length > 8e3) {
    throw "URI too long";
  }
  const src = str, b = str.indexOf("["), e = str.indexOf("]");
  if (b != -1 && e != -1) {
    str = str.substring(0, b) + str.substring(b, e).replace(/:/g, ";") + str.substring(e, str.length);
  }
  let m = re.exec(str || ""), uri = {}, i = 14;
  while (i--) {
    uri[parts[i]] = m[i] || "";
  }
  if (b != -1 && e != -1) {
    uri.source = src;
    uri.host = uri.host.substring(1, uri.host.length - 1).replace(/;/g, ":");
    uri.authority = uri.authority.replace("[", "").replace("]", "").replace(/;/g, ":");
    uri.ipv6uri = true;
  }
  uri.pathNames = pathNames(uri, uri["path"]);
  uri.queryKey = queryKey(uri, uri["query"]);
  return uri;
}
function pathNames(obj, path) {
  const regx = /\/{2,9}/g, names = path.replace(regx, "/").split("/");
  if (path.slice(0, 1) == "/" || path.length === 0) {
    names.splice(0, 1);
  }
  if (path.slice(-1) == "/") {
    names.splice(names.length - 1, 1);
  }
  return names;
}
function queryKey(uri, query) {
  const data = {};
  query.replace(/(?:^|&)([^&=]*)=?([^&]*)/g, function($0, $1, $2) {
    if ($1) {
      data[$1] = $2;
    }
  });
  return data;
}
const withEventListeners = typeof addEventListener === "function" && typeof removeEventListener === "function";
const OFFLINE_EVENT_LISTENERS = [];
if (withEventListeners) {
  addEventListener("offline", () => {
    OFFLINE_EVENT_LISTENERS.forEach((listener) => listener());
  }, false);
}
class SocketWithoutUpgrade extends Emitter {
  /**
   * Socket constructor.
   *
   * @param {String|Object} uri - uri or options
   * @param {Object} opts - options
   */
  constructor(uri, opts) {
    super();
    this.binaryType = defaultBinaryType;
    this.writeBuffer = [];
    this._prevBufferLen = 0;
    this._pingInterval = -1;
    this._pingTimeout = -1;
    this._maxPayload = -1;
    this._pingTimeoutTime = Infinity;
    if (uri && "object" === typeof uri) {
      opts = uri;
      uri = null;
    }
    if (uri) {
      const parsedUri = parse$8(uri);
      opts.hostname = parsedUri.host;
      opts.secure = parsedUri.protocol === "https" || parsedUri.protocol === "wss";
      opts.port = parsedUri.port;
      if (parsedUri.query)
        opts.query = parsedUri.query;
    } else if (opts.host) {
      opts.hostname = parse$8(opts.host).host;
    }
    installTimerFunctions(this, opts);
    this.secure = null != opts.secure ? opts.secure : typeof location !== "undefined" && "https:" === location.protocol;
    if (opts.hostname && !opts.port) {
      opts.port = this.secure ? "443" : "80";
    }
    this.hostname = opts.hostname || (typeof location !== "undefined" ? location.hostname : "localhost");
    this.port = opts.port || (typeof location !== "undefined" && location.port ? location.port : this.secure ? "443" : "80");
    this.transports = [];
    this._transportsByName = {};
    opts.transports.forEach((t) => {
      const transportName = t.prototype.name;
      this.transports.push(transportName);
      this._transportsByName[transportName] = t;
    });
    this.opts = Object.assign({
      path: "/engine.io",
      agent: false,
      withCredentials: false,
      upgrade: true,
      timestampParam: "t",
      rememberUpgrade: false,
      addTrailingSlash: true,
      rejectUnauthorized: true,
      perMessageDeflate: {
        threshold: 1024
      },
      transportOptions: {},
      closeOnBeforeunload: false
    }, opts);
    this.opts.path = this.opts.path.replace(/\/$/, "") + (this.opts.addTrailingSlash ? "/" : "");
    if (typeof this.opts.query === "string") {
      this.opts.query = decode(this.opts.query);
    }
    if (withEventListeners) {
      if (this.opts.closeOnBeforeunload) {
        this._beforeunloadEventListener = () => {
          if (this.transport) {
            this.transport.removeAllListeners();
            this.transport.close();
          }
        };
        addEventListener("beforeunload", this._beforeunloadEventListener, false);
      }
      if (this.hostname !== "localhost") {
        this._offlineEventListener = () => {
          this._onClose("transport close", {
            description: "network connection lost"
          });
        };
        OFFLINE_EVENT_LISTENERS.push(this._offlineEventListener);
      }
    }
    if (this.opts.withCredentials) {
      this._cookieJar = createCookieJar();
    }
    this._open();
  }
  /**
   * Creates transport of the given type.
   *
   * @param {String} name - transport name
   * @return {Transport}
   * @private
   */
  createTransport(name) {
    const query = Object.assign({}, this.opts.query);
    query.EIO = protocol$1;
    query.transport = name;
    if (this.id)
      query.sid = this.id;
    const opts = Object.assign({}, this.opts, {
      query,
      socket: this,
      hostname: this.hostname,
      secure: this.secure,
      port: this.port
    }, this.opts.transportOptions[name]);
    return new this._transportsByName[name](opts);
  }
  /**
   * Initializes transport to use and starts probe.
   *
   * @private
   */
  _open() {
    if (this.transports.length === 0) {
      this.setTimeoutFn(() => {
        this.emitReserved("error", "No transports available");
      }, 0);
      return;
    }
    const transportName = this.opts.rememberUpgrade && SocketWithoutUpgrade.priorWebsocketSuccess && this.transports.indexOf("websocket") !== -1 ? "websocket" : this.transports[0];
    this.readyState = "opening";
    const transport = this.createTransport(transportName);
    transport.open();
    this.setTransport(transport);
  }
  /**
   * Sets the current transport. Disables the existing one (if any).
   *
   * @private
   */
  setTransport(transport) {
    if (this.transport) {
      this.transport.removeAllListeners();
    }
    this.transport = transport;
    transport.on("drain", this._onDrain.bind(this)).on("packet", this._onPacket.bind(this)).on("error", this._onError.bind(this)).on("close", (reason) => this._onClose("transport close", reason));
  }
  /**
   * Called when connection is deemed open.
   *
   * @private
   */
  onOpen() {
    this.readyState = "open";
    SocketWithoutUpgrade.priorWebsocketSuccess = "websocket" === this.transport.name;
    this.emitReserved("open");
    this.flush();
  }
  /**
   * Handles a packet.
   *
   * @private
   */
  _onPacket(packet) {
    if ("opening" === this.readyState || "open" === this.readyState || "closing" === this.readyState) {
      this.emitReserved("packet", packet);
      this.emitReserved("heartbeat");
      switch (packet.type) {
        case "open":
          this.onHandshake(JSON.parse(packet.data));
          break;
        case "ping":
          this._sendPacket("pong");
          this.emitReserved("ping");
          this.emitReserved("pong");
          this._resetPingTimeout();
          break;
        case "error":
          const err = new Error("server error");
          err.code = packet.data;
          this._onError(err);
          break;
        case "message":
          this.emitReserved("data", packet.data);
          this.emitReserved("message", packet.data);
          break;
      }
    }
  }
  /**
   * Called upon handshake completion.
   *
   * @param {Object} data - handshake obj
   * @private
   */
  onHandshake(data) {
    this.emitReserved("handshake", data);
    this.id = data.sid;
    this.transport.query.sid = data.sid;
    this._pingInterval = data.pingInterval;
    this._pingTimeout = data.pingTimeout;
    this._maxPayload = data.maxPayload;
    this.onOpen();
    if ("closed" === this.readyState)
      return;
    this._resetPingTimeout();
  }
  /**
   * Sets and resets ping timeout timer based on server pings.
   *
   * @private
   */
  _resetPingTimeout() {
    this.clearTimeoutFn(this._pingTimeoutTimer);
    const delay = this._pingInterval + this._pingTimeout;
    this._pingTimeoutTime = Date.now() + delay;
    this._pingTimeoutTimer = this.setTimeoutFn(() => {
      this._onClose("ping timeout");
    }, delay);
    if (this.opts.autoUnref) {
      this._pingTimeoutTimer.unref();
    }
  }
  /**
   * Called on `drain` event
   *
   * @private
   */
  _onDrain() {
    this.writeBuffer.splice(0, this._prevBufferLen);
    this._prevBufferLen = 0;
    if (0 === this.writeBuffer.length) {
      this.emitReserved("drain");
    } else {
      this.flush();
    }
  }
  /**
   * Flush write buffers.
   *
   * @private
   */
  flush() {
    if ("closed" !== this.readyState && this.transport.writable && !this.upgrading && this.writeBuffer.length) {
      const packets = this._getWritablePackets();
      this.transport.send(packets);
      this._prevBufferLen = packets.length;
      this.emitReserved("flush");
    }
  }
  /**
   * Ensure the encoded size of the writeBuffer is below the maxPayload value sent by the server (only for HTTP
   * long-polling)
   *
   * @private
   */
  _getWritablePackets() {
    const shouldCheckPayloadSize = this._maxPayload && this.transport.name === "polling" && this.writeBuffer.length > 1;
    if (!shouldCheckPayloadSize) {
      return this.writeBuffer;
    }
    let payloadSize = 1;
    for (let i = 0; i < this.writeBuffer.length; i++) {
      const data = this.writeBuffer[i].data;
      if (data) {
        payloadSize += byteLength(data);
      }
      if (i > 0 && payloadSize > this._maxPayload) {
        return this.writeBuffer.slice(0, i);
      }
      payloadSize += 2;
    }
    return this.writeBuffer;
  }
  /**
   * Checks whether the heartbeat timer has expired but the socket has not yet been notified.
   *
   * Note: this method is private for now because it does not really fit the WebSocket API, but if we put it in the
   * `write()` method then the message would not be buffered by the Socket.IO client.
   *
   * @return {boolean}
   * @private
   */
  /* private */
  _hasPingExpired() {
    if (!this._pingTimeoutTime)
      return true;
    const hasExpired = Date.now() > this._pingTimeoutTime;
    if (hasExpired) {
      this._pingTimeoutTime = 0;
      nextTick(() => {
        this._onClose("ping timeout");
      }, this.setTimeoutFn);
    }
    return hasExpired;
  }
  /**
   * Sends a message.
   *
   * @param {String} msg - message.
   * @param {Object} options.
   * @param {Function} fn - callback function.
   * @return {Socket} for chaining.
   */
  write(msg, options, fn) {
    this._sendPacket("message", msg, options, fn);
    return this;
  }
  /**
   * Sends a message. Alias of {@link Socket#write}.
   *
   * @param {String} msg - message.
   * @param {Object} options.
   * @param {Function} fn - callback function.
   * @return {Socket} for chaining.
   */
  send(msg, options, fn) {
    this._sendPacket("message", msg, options, fn);
    return this;
  }
  /**
   * Sends a packet.
   *
   * @param {String} type: packet type.
   * @param {String} data.
   * @param {Object} options.
   * @param {Function} fn - callback function.
   * @private
   */
  _sendPacket(type, data, options, fn) {
    if ("function" === typeof data) {
      fn = data;
      data = void 0;
    }
    if ("function" === typeof options) {
      fn = options;
      options = null;
    }
    if ("closing" === this.readyState || "closed" === this.readyState) {
      return;
    }
    options = options || {};
    options.compress = false !== options.compress;
    const packet = {
      type,
      data,
      options
    };
    this.emitReserved("packetCreate", packet);
    this.writeBuffer.push(packet);
    if (fn)
      this.once("flush", fn);
    this.flush();
  }
  /**
   * Closes the connection.
   */
  close() {
    const close = () => {
      this._onClose("forced close");
      this.transport.close();
    };
    const cleanupAndClose = () => {
      this.off("upgrade", cleanupAndClose);
      this.off("upgradeError", cleanupAndClose);
      close();
    };
    const waitForUpgrade = () => {
      this.once("upgrade", cleanupAndClose);
      this.once("upgradeError", cleanupAndClose);
    };
    if ("opening" === this.readyState || "open" === this.readyState) {
      this.readyState = "closing";
      if (this.writeBuffer.length) {
        this.once("drain", () => {
          if (this.upgrading) {
            waitForUpgrade();
          } else {
            close();
          }
        });
      } else if (this.upgrading) {
        waitForUpgrade();
      } else {
        close();
      }
    }
    return this;
  }
  /**
   * Called upon transport error
   *
   * @private
   */
  _onError(err) {
    SocketWithoutUpgrade.priorWebsocketSuccess = false;
    if (this.opts.tryAllTransports && this.transports.length > 1 && this.readyState === "opening") {
      this.transports.shift();
      return this._open();
    }
    this.emitReserved("error", err);
    this._onClose("transport error", err);
  }
  /**
   * Called upon transport close.
   *
   * @private
   */
  _onClose(reason, description) {
    if ("opening" === this.readyState || "open" === this.readyState || "closing" === this.readyState) {
      this.clearTimeoutFn(this._pingTimeoutTimer);
      this.transport.removeAllListeners("close");
      this.transport.close();
      this.transport.removeAllListeners();
      if (withEventListeners) {
        if (this._beforeunloadEventListener) {
          removeEventListener("beforeunload", this._beforeunloadEventListener, false);
        }
        if (this._offlineEventListener) {
          const i = OFFLINE_EVENT_LISTENERS.indexOf(this._offlineEventListener);
          if (i !== -1) {
            OFFLINE_EVENT_LISTENERS.splice(i, 1);
          }
        }
      }
      this.readyState = "closed";
      this.id = null;
      this.emitReserved("close", reason, description);
      this.writeBuffer = [];
      this._prevBufferLen = 0;
    }
  }
}
SocketWithoutUpgrade.protocol = protocol$1;
class SocketWithUpgrade extends SocketWithoutUpgrade {
  constructor() {
    super(...arguments);
    this._upgrades = [];
  }
  onOpen() {
    super.onOpen();
    if ("open" === this.readyState && this.opts.upgrade) {
      for (let i = 0; i < this._upgrades.length; i++) {
        this._probe(this._upgrades[i]);
      }
    }
  }
  /**
   * Probes a transport.
   *
   * @param {String} name - transport name
   * @private
   */
  _probe(name) {
    let transport = this.createTransport(name);
    let failed = false;
    SocketWithoutUpgrade.priorWebsocketSuccess = false;
    const onTransportOpen = () => {
      if (failed)
        return;
      transport.send([{ type: "ping", data: "probe" }]);
      transport.once("packet", (msg) => {
        if (failed)
          return;
        if ("pong" === msg.type && "probe" === msg.data) {
          this.upgrading = true;
          this.emitReserved("upgrading", transport);
          if (!transport)
            return;
          SocketWithoutUpgrade.priorWebsocketSuccess = "websocket" === transport.name;
          this.transport.pause(() => {
            if (failed)
              return;
            if ("closed" === this.readyState)
              return;
            cleanup();
            this.setTransport(transport);
            transport.send([{ type: "upgrade" }]);
            this.emitReserved("upgrade", transport);
            transport = null;
            this.upgrading = false;
            this.flush();
          });
        } else {
          const err = new Error("probe error");
          err.transport = transport.name;
          this.emitReserved("upgradeError", err);
        }
      });
    };
    function freezeTransport() {
      if (failed)
        return;
      failed = true;
      cleanup();
      transport.close();
      transport = null;
    }
    const onerror = (err) => {
      const error = new Error("probe error: " + err);
      error.transport = transport.name;
      freezeTransport();
      this.emitReserved("upgradeError", error);
    };
    function onTransportClose() {
      onerror("transport closed");
    }
    function onclose() {
      onerror("socket closed");
    }
    function onupgrade(to) {
      if (transport && to.name !== transport.name) {
        freezeTransport();
      }
    }
    const cleanup = () => {
      transport.removeListener("open", onTransportOpen);
      transport.removeListener("error", onerror);
      transport.removeListener("close", onTransportClose);
      this.off("close", onclose);
      this.off("upgrading", onupgrade);
    };
    transport.once("open", onTransportOpen);
    transport.once("error", onerror);
    transport.once("close", onTransportClose);
    this.once("close", onclose);
    this.once("upgrading", onupgrade);
    if (this._upgrades.indexOf("webtransport") !== -1 && name !== "webtransport") {
      this.setTimeoutFn(() => {
        if (!failed) {
          transport.open();
        }
      }, 200);
    } else {
      transport.open();
    }
  }
  onHandshake(data) {
    this._upgrades = this._filterUpgrades(data.upgrades);
    super.onHandshake(data);
  }
  /**
   * Filters upgrades, returning only those matching client transports.
   *
   * @param {Array} upgrades - server upgrades
   * @private
   */
  _filterUpgrades(upgrades) {
    const filteredUpgrades = [];
    for (let i = 0; i < upgrades.length; i++) {
      if (~this.transports.indexOf(upgrades[i]))
        filteredUpgrades.push(upgrades[i]);
    }
    return filteredUpgrades;
  }
}
let Socket$1 = class Socket extends SocketWithUpgrade {
  constructor(uri, opts = {}) {
    const o = typeof uri === "object" ? uri : opts;
    if (!o.transports || o.transports && typeof o.transports[0] === "string") {
      o.transports = (o.transports || ["polling", "websocket", "webtransport"]).map((transportName) => transports[transportName]).filter((t) => !!t);
    }
    super(uri, o);
  }
};
function url$1(uri, path = "", loc) {
  let obj = uri;
  loc = loc || typeof location !== "undefined" && location;
  if (null == uri)
    uri = loc.protocol + "//" + loc.host;
  if (typeof uri === "string") {
    if ("/" === uri.charAt(0)) {
      if ("/" === uri.charAt(1)) {
        uri = loc.protocol + uri;
      } else {
        uri = loc.host + uri;
      }
    }
    if (!/^(https?|wss?):\/\//.test(uri)) {
      if ("undefined" !== typeof loc) {
        uri = loc.protocol + "//" + uri;
      } else {
        uri = "https://" + uri;
      }
    }
    obj = parse$8(uri);
  }
  if (!obj.port) {
    if (/^(http|ws)$/.test(obj.protocol)) {
      obj.port = "80";
    } else if (/^(http|ws)s$/.test(obj.protocol)) {
      obj.port = "443";
    }
  }
  obj.path = obj.path || "/";
  const ipv6 = obj.host.indexOf(":") !== -1;
  const host2 = ipv6 ? "[" + obj.host + "]" : obj.host;
  obj.id = obj.protocol + "://" + host2 + ":" + obj.port + path;
  obj.href = obj.protocol + "://" + host2 + (loc && loc.port === obj.port ? "" : ":" + obj.port);
  return obj;
}
const withNativeArrayBuffer = typeof ArrayBuffer === "function";
const isView = (obj) => {
  return typeof ArrayBuffer.isView === "function" ? ArrayBuffer.isView(obj) : obj.buffer instanceof ArrayBuffer;
};
const toString = Object.prototype.toString;
const withNativeBlob = typeof Blob === "function" || typeof Blob !== "undefined" && toString.call(Blob) === "[object BlobConstructor]";
const withNativeFile = typeof File === "function" || typeof File !== "undefined" && toString.call(File) === "[object FileConstructor]";
function isBinary(obj) {
  return withNativeArrayBuffer &