prod-server.js

import * as path from 'path';
import * as require$$7 from 'url';
import require$$7__default from 'url';
import require$$0$2 from 'stream';
import require$$0 from 'zlib';
import require$$0$1 from 'buffer';
import require$$3 from 'net';
import require$$4 from 'tls';
import require$$5 from 'crypto';
import require$$0$3 from 'events';
import require$$1 from 'https';
import require$$2 from 'http';

function getDefaultExportFromCjs (x) {
	return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
}

var bufferUtil$1 = {exports: {}};

var constants = {
  BINARY_TYPES: ['nodebuffer', 'arraybuffer', 'fragments'],
  EMPTY_BUFFER: Buffer.alloc(0),
  GUID: '258EAFA5-E914-47DA-95CA-C5AB0DC85B11',
  kForOnEventAttribute: Symbol('kIsForOnEventAttribute'),
  kListener: Symbol('kListener'),
  kStatusCode: Symbol('status-code'),
  kWebSocket: Symbol('websocket'),
  NOOP: () => {}
};

var unmask$1;
var mask;

const { EMPTY_BUFFER: EMPTY_BUFFER$3 } = constants;

const FastBuffer$2 = Buffer[Symbol.species];

/**
 * Merges an array of buffers into a new buffer.
 *
 * @param {Buffer[]} list The array of buffers to concat
 * @param {Number} totalLength The total length of buffers in the list
 * @return {Buffer} The resulting buffer
 * @public
 */
function concat$1(list, totalLength) {
  if (list.length === 0) return EMPTY_BUFFER$3;
  if (list.length === 1) return list[0];

  const target = Buffer.allocUnsafe(totalLength);
  let offset = 0;

  for (let i = 0; i < list.length; i++) {
    const buf = list[i];
    target.set(buf, offset);
    offset += buf.length;
  }

  if (offset < totalLength) {
    return new FastBuffer$2(target.buffer, target.byteOffset, offset);
  }

  return target;
}

/**
 * Masks a buffer using the given mask.
 *
 * @param {Buffer} source The buffer to mask
 * @param {Buffer} mask The mask to use
 * @param {Buffer} output The buffer where to store the result
 * @param {Number} offset The offset at which to start writing
 * @param {Number} length The number of bytes to mask.
 * @public
 */
function _mask(source, mask, output, offset, length) {
  for (let i = 0; i < length; i++) {
    output[offset + i] = source[i] ^ mask[i & 3];
  }
}

/**
 * Unmasks a buffer using the given mask.
 *
 * @param {Buffer} buffer The buffer to unmask
 * @param {Buffer} mask The mask to use
 * @public
 */
function _unmask(buffer, mask) {
  for (let i = 0; i < buffer.length; i++) {
    buffer[i] ^= mask[i & 3];
  }
}

/**
 * Converts a buffer to an `ArrayBuffer`.
 *
 * @param {Buffer} buf The buffer to convert
 * @return {ArrayBuffer} Converted buffer
 * @public
 */
function toArrayBuffer$1(buf) {
  if (buf.length === buf.buffer.byteLength) {
    return buf.buffer;
  }

  return buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.length);
}

/**
 * Converts `data` to a `Buffer`.
 *
 * @param {*} data The data to convert
 * @return {Buffer} The buffer
 * @throws {TypeError}
 * @public
 */
function toBuffer$2(data) {
  toBuffer$2.readOnly = true;

  if (Buffer.isBuffer(data)) return data;

  let buf;

  if (data instanceof ArrayBuffer) {
    buf = new FastBuffer$2(data);
  } else if (ArrayBuffer.isView(data)) {
    buf = new FastBuffer$2(data.buffer, data.byteOffset, data.byteLength);
  } else {
    buf = Buffer.from(data);
    toBuffer$2.readOnly = false;
  }

  return buf;
}

bufferUtil$1.exports = {
  concat: concat$1,
  mask: _mask,
  toArrayBuffer: toArrayBuffer$1,
  toBuffer: toBuffer$2,
  unmask: _unmask
};

/* istanbul ignore else  */
if (!process.env.WS_NO_BUFFER_UTIL) {
  try {
    const bufferUtil = require('bufferutil');

    mask = bufferUtil$1.exports.mask = function (source, mask, output, offset, length) {
      if (length < 48) _mask(source, mask, output, offset, length);
      else bufferUtil.mask(source, mask, output, offset, length);
    };

    unmask$1 = bufferUtil$1.exports.unmask = function (buffer, mask) {
      if (buffer.length < 32) _unmask(buffer, mask);
      else bufferUtil.unmask(buffer, mask);
    };
  } catch (e) {
    // Continue regardless of the error.
  }
}

var bufferUtilExports = bufferUtil$1.exports;

const kDone = Symbol('kDone');
const kRun = Symbol('kRun');

/**
 * A very simple job queue with adjustable concurrency. Adapted from
 * https://github.com/STRML/async-limiter
 */
let Limiter$1 = class Limiter {
  /**
   * Creates a new `Limiter`.
   *
   * @param {Number} [concurrency=Infinity] The maximum number of jobs allowed
   *     to run concurrently
   */
  constructor(concurrency) {
    this[kDone] = () => {
      this.pending--;
      this[kRun]();
    };
    this.concurrency = concurrency || Infinity;
    this.jobs = [];
    this.pending = 0;
  }

  /**
   * Adds a job to the queue.
   *
   * @param {Function} job The job to run
   * @public
   */
  add(job) {
    this.jobs.push(job);
    this[kRun]();
  }

  /**
   * Removes a job from the queue and runs it if possible.
   *
   * @private
   */
  [kRun]() {
    if (this.pending === this.concurrency) return;

    if (this.jobs.length) {
      const job = this.jobs.shift();

      this.pending++;
      job(this[kDone]);
    }
  }
};

var limiter = Limiter$1;

const zlib = require$$0;

const bufferUtil = bufferUtilExports;
const Limiter = limiter;
const { kStatusCode: kStatusCode$2 } = constants;

const FastBuffer$1 = Buffer[Symbol.species];
const TRAILER = Buffer.from([0x00, 0x00, 0xff, 0xff]);
const kPerMessageDeflate = Symbol('permessage-deflate');
const kTotalLength = Symbol('total-length');
const kCallback = Symbol('callback');
const kBuffers = Symbol('buffers');
const kError$1 = Symbol('error');

//
// We limit zlib concurrency, which prevents severe memory fragmentation
// as documented in https://github.com/nodejs/node/issues/8871#issuecomment-250915913
// and https://github.com/websockets/ws/issues/1202
//
// Intentionally global; it's the global thread pool that's an issue.
//
let zlibLimiter;

/**
 * permessage-deflate implementation.
 */
let PerMessageDeflate$4 = class PerMessageDeflate {
  /**
   * Creates a PerMessageDeflate instance.
   *
   * @param {Object} [options] Configuration options
   * @param {(Boolean|Number)} [options.clientMaxWindowBits] Advertise support
   *     for, or request, a custom client window size
   * @param {Boolean} [options.clientNoContextTakeover=false] Advertise/
   *     acknowledge disabling of client context takeover
   * @param {Number} [options.concurrencyLimit=10] The number of concurrent
   *     calls to zlib
   * @param {(Boolean|Number)} [options.serverMaxWindowBits] Request/confirm the
   *     use of a custom server window size
   * @param {Boolean} [options.serverNoContextTakeover=false] Request/accept
   *     disabling of server context takeover
   * @param {Number} [options.threshold=1024] Size (in bytes) below which
   *     messages should not be compressed if context takeover is disabled
   * @param {Object} [options.zlibDeflateOptions] Options to pass to zlib on
   *     deflate
   * @param {Object} [options.zlibInflateOptions] Options to pass to zlib on
   *     inflate
   * @param {Boolean} [isServer=false] Create the instance in either server or
   *     client mode
   * @param {Number} [maxPayload=0] The maximum allowed message length
   */
  constructor(options, isServer, maxPayload) {
    this._maxPayload = maxPayload | 0;
    this._options = options || {};
    this._threshold =
      this._options.threshold !== undefined ? this._options.threshold : 1024;
    this._isServer = !!isServer;
    this._deflate = null;
    this._inflate = null;

    this.params = null;

    if (!zlibLimiter) {
      const concurrency =
        this._options.concurrencyLimit !== undefined
          ? this._options.concurrencyLimit
          : 10;
      zlibLimiter = new Limiter(concurrency);
    }
  }

  /**
   * @type {String}
   */
  static get extensionName() {
    return 'permessage-deflate';
  }

  /**
   * Create an extension negotiation offer.
   *
   * @return {Object} Extension parameters
   * @public
   */
  offer() {
    const params = {};

    if (this._options.serverNoContextTakeover) {
      params.server_no_context_takeover = true;
    }
    if (this._options.clientNoContextTakeover) {
      params.client_no_context_takeover = true;
    }
    if (this._options.serverMaxWindowBits) {
      params.server_max_window_bits = this._options.serverMaxWindowBits;
    }
    if (this._options.clientMaxWindowBits) {
      params.client_max_window_bits = this._options.clientMaxWindowBits;
    } else if (this._options.clientMaxWindowBits == null) {
      params.client_max_window_bits = true;
    }

    return params;
  }

  /**
   * Accept an extension negotiation offer/response.
   *
   * @param {Array} configurations The extension negotiation offers/reponse
   * @return {Object} Accepted configuration
   * @public
   */
  accept(configurations) {
    configurations = this.normalizeParams(configurations);

    this.params = this._isServer
      ? this.acceptAsServer(configurations)
      : this.acceptAsClient(configurations);

    return this.params;
  }

  /**
   * Releases all resources used by the extension.
   *
   * @public
   */
  cleanup() {
    if (this._inflate) {
      this._inflate.close();
      this._inflate = null;
    }

    if (this._deflate) {
      const callback = this._deflate[kCallback];

      this._deflate.close();
      this._deflate = null;

      if (callback) {
        callback(
          new Error(
            'The deflate stream was closed while data was being processed'
          )
        );
      }
    }
  }

  /**
   *  Accept an extension negotiation offer.
   *
   * @param {Array} offers The extension negotiation offers
   * @return {Object} Accepted configuration
   * @private
   */
  acceptAsServer(offers) {
    const opts = this._options;
    const accepted = offers.find((params) => {
      if (
        (opts.serverNoContextTakeover === false &&
          params.server_no_context_takeover) ||
        (params.server_max_window_bits &&
          (opts.serverMaxWindowBits === false ||
            (typeof opts.serverMaxWindowBits === 'number' &&
              opts.serverMaxWindowBits > params.server_max_window_bits))) ||
        (typeof opts.clientMaxWindowBits === 'number' &&
          !params.client_max_window_bits)
      ) {
        return false;
      }

      return true;
    });

    if (!accepted) {
      throw new Error('None of the extension offers can be accepted');
    }

    if (opts.serverNoContextTakeover) {
      accepted.server_no_context_takeover = true;
    }
    if (opts.clientNoContextTakeover) {
      accepted.client_no_context_takeover = true;
    }
    if (typeof opts.serverMaxWindowBits === 'number') {
      accepted.server_max_window_bits = opts.serverMaxWindowBits;
    }
    if (typeof opts.clientMaxWindowBits === 'number') {
      accepted.client_max_window_bits = opts.clientMaxWindowBits;
    } else if (
      accepted.client_max_window_bits === true ||
      opts.clientMaxWindowBits === false
    ) {
      delete accepted.client_max_window_bits;
    }

    return accepted;
  }

  /**
   * Accept the extension negotiation response.
   *
   * @param {Array} response The extension negotiation response
   * @return {Object} Accepted configuration
   * @private
   */
  acceptAsClient(response) {
    const params = response[0];

    if (
      this._options.clientNoContextTakeover === false &&
      params.client_no_context_takeover
    ) {
      throw new Error('Unexpected parameter "client_no_context_takeover"');
    }

    if (!params.client_max_window_bits) {
      if (typeof this._options.clientMaxWindowBits === 'number') {
        params.client_max_window_bits = this._options.clientMaxWindowBits;
      }
    } else if (
      this._options.clientMaxWindowBits === false ||
      (typeof this._options.clientMaxWindowBits === 'number' &&
        params.client_max_window_bits > this._options.clientMaxWindowBits)
    ) {
      throw new Error(
        'Unexpected or invalid parameter "client_max_window_bits"'
      );
    }

    return params;
  }

  /**
   * Normalize parameters.
   *
   * @param {Array} configurations The extension negotiation offers/reponse
   * @return {Array} The offers/response with normalized parameters
   * @private
   */
  normalizeParams(configurations) {
    configurations.forEach((params) => {
      Object.keys(params).forEach((key) => {
        let value = params[key];

        if (value.length > 1) {
          throw new Error(`Parameter "${key}" must have only a single value`);
        }

        value = value[0];

        if (key === 'client_max_window_bits') {
          if (value !== true) {
            const num = +value;
            if (!Number.isInteger(num) || num < 8 || num > 15) {
              throw new TypeError(
                `Invalid value for parameter "${key}": ${value}`
              );
            }
            value = num;
          } else if (!this._isServer) {
            throw new TypeError(
              `Invalid value for parameter "${key}": ${value}`
            );
          }
        } else if (key === 'server_max_window_bits') {
          const num = +value;
          if (!Number.isInteger(num) || num < 8 || num > 15) {
            throw new TypeError(
              `Invalid value for parameter "${key}": ${value}`
            );
          }
          value = num;
        } else if (
          key === 'client_no_context_takeover' ||
          key === 'server_no_context_takeover'
        ) {
          if (value !== true) {
            throw new TypeError(
              `Invalid value for parameter "${key}": ${value}`
            );
          }
        } else {
          throw new Error(`Unknown parameter "${key}"`);
        }

        params[key] = value;
      });
    });

    return configurations;
  }

  /**
   * Decompress data. Concurrency limited.
   *
   * @param {Buffer} data Compressed data
   * @param {Boolean} fin Specifies whether or not this is the last fragment
   * @param {Function} callback Callback
   * @public
   */
  decompress(data, fin, callback) {
    zlibLimiter.add((done) => {
      this._decompress(data, fin, (err, result) => {
        done();
        callback(err, result);
      });
    });
  }

  /**
   * Compress data. Concurrency limited.
   *
   * @param {(Buffer|String)} data Data to compress
   * @param {Boolean} fin Specifies whether or not this is the last fragment
   * @param {Function} callback Callback
   * @public
   */
  compress(data, fin, callback) {
    zlibLimiter.add((done) => {
      this._compress(data, fin, (err, result) => {
        done();
        callback(err, result);
      });
    });
  }

  /**
   * Decompress data.
   *
   * @param {Buffer} data Compressed data
   * @param {Boolean} fin Specifies whether or not this is the last fragment
   * @param {Function} callback Callback
   * @private
   */
  _decompress(data, fin, callback) {
    const endpoint = this._isServer ? 'client' : 'server';

    if (!this._inflate) {
      const key = `${endpoint}_max_window_bits`;
      const windowBits =
        typeof this.params[key] !== 'number'
          ? zlib.Z_DEFAULT_WINDOWBITS
          : this.params[key];

      this._inflate = zlib.createInflateRaw({
        ...this._options.zlibInflateOptions,
        windowBits
      });
      this._inflate[kPerMessageDeflate] = this;
      this._inflate[kTotalLength] = 0;
      this._inflate[kBuffers] = [];
      this._inflate.on('error', inflateOnError);
      this._inflate.on('data', inflateOnData);
    }

    this._inflate[kCallback] = callback;

    this._inflate.write(data);
    if (fin) this._inflate.write(TRAILER);

    this._inflate.flush(() => {
      const err = this._inflate[kError$1];

      if (err) {
        this._inflate.close();
        this._inflate = null;
        callback(err);
        return;
      }

      const data = bufferUtil.concat(
        this._inflate[kBuffers],
        this._inflate[kTotalLength]
      );

      if (this._inflate._readableState.endEmitted) {
        this._inflate.close();
        this._inflate = null;
      } else {
        this._inflate[kTotalLength] = 0;
        this._inflate[kBuffers] = [];

        if (fin && this.params[`${endpoint}_no_context_takeover`]) {
          this._inflate.reset();
        }
      }

      callback(null, data);
    });
  }

  /**
   * Compress data.
   *
   * @param {(Buffer|String)} data Data to compress
   * @param {Boolean} fin Specifies whether or not this is the last fragment
   * @param {Function} callback Callback
   * @private
   */
  _compress(data, fin, callback) {
    const endpoint = this._isServer ? 'server' : 'client';

    if (!this._deflate) {
      const key = `${endpoint}_max_window_bits`;
      const windowBits =
        typeof this.params[key] !== 'number'
          ? zlib.Z_DEFAULT_WINDOWBITS
          : this.params[key];

      this._deflate = zlib.createDeflateRaw({
        ...this._options.zlibDeflateOptions,
        windowBits
      });

      this._deflate[kTotalLength] = 0;
      this._deflate[kBuffers] = [];

      this._deflate.on('data', deflateOnData);
    }

    this._deflate[kCallback] = callback;

    this._deflate.write(data);
    this._deflate.flush(zlib.Z_SYNC_FLUSH, () => {
      if (!this._deflate) {
        //
        // The deflate stream was closed while data was being processed.
        //
        return;
      }

      let data = bufferUtil.concat(
        this._deflate[kBuffers],
        this._deflate[kTotalLength]
      );

      if (fin) {
        data = new FastBuffer$1(data.buffer, data.byteOffset, data.length - 4);
      }

      //
      // Ensure that the callback will not be called again in
      // `PerMessageDeflate#cleanup()`.
      //
      this._deflate[kCallback] = null;

      this._deflate[kTotalLength] = 0;
      this._deflate[kBuffers] = [];

      if (fin && this.params[`${endpoint}_no_context_takeover`]) {
        this._deflate.reset();
      }

      callback(null, data);
    });
  }
};

var permessageDeflate = PerMessageDeflate$4;

/**
 * The listener of the `zlib.DeflateRaw` stream `'data'` event.
 *
 * @param {Buffer} chunk A chunk of data
 * @private
 */
function deflateOnData(chunk) {
  this[kBuffers].push(chunk);
  this[kTotalLength] += chunk.length;
}

/**
 * The listener of the `zlib.InflateRaw` stream `'data'` event.
 *
 * @param {Buffer} chunk A chunk of data
 * @private
 */
function inflateOnData(chunk) {
  this[kTotalLength] += chunk.length;

  if (
    this[kPerMessageDeflate]._maxPayload < 1 ||
    this[kTotalLength] <= this[kPerMessageDeflate]._maxPayload
  ) {
    this[kBuffers].push(chunk);
    return;
  }

  this[kError$1] = new RangeError('Max payload size exceeded');
  this[kError$1].code = 'WS_ERR_UNSUPPORTED_MESSAGE_LENGTH';
  this[kError$1][kStatusCode$2] = 1009;
  this.removeListener('data', inflateOnData);
  this.reset();
}

/**
 * The listener of the `zlib.InflateRaw` stream `'error'` event.
 *
 * @param {Error} err The emitted error
 * @private
 */
function inflateOnError(err) {
  //
  // There is no need to call `Zlib#close()` as the handle is automatically
  // closed when an error is emitted.
  //
  this[kPerMessageDeflate]._inflate = null;
  err[kStatusCode$2] = 1007;
  this[kCallback](err);
}

var validation = {exports: {}};

var isValidUTF8_1;

const { isUtf8 } = require$$0$1;

//
// Allowed token characters:
//
// '!', '#', '$', '%', '&', ''', '*', '+', '-',
// '.', 0-9, A-Z, '^', '_', '`', a-z, '|', '~'
//
// tokenChars[32] === 0 // ' '
// tokenChars[33] === 1 // '!'
// tokenChars[34] === 0 // '"'
// ...
//
// prettier-ignore
const tokenChars$2 = [
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0 - 15
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16 - 31
  0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, // 32 - 47
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, // 48 - 63
  0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 64 - 79
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, // 80 - 95
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 96 - 111
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0 // 112 - 127
];

/**
 * Checks if a status code is allowed in a close frame.
 *
 * @param {Number} code The status code
 * @return {Boolean} `true` if the status code is valid, else `false`
 * @public
 */
function isValidStatusCode$2(code) {
  return (
    (code >= 1000 &&
      code <= 1014 &&
      code !== 1004 &&
      code !== 1005 &&
      code !== 1006) ||
    (code >= 3000 && code <= 4999)
  );
}

/**
 * Checks if a given buffer contains only correct UTF-8.
 * Ported from https://www.cl.cam.ac.uk/%7Emgk25/ucs/utf8_check.c by
 * Markus Kuhn.
 *
 * @param {Buffer} buf The buffer to check
 * @return {Boolean} `true` if `buf` contains only correct UTF-8, else `false`
 * @public
 */
function _isValidUTF8(buf) {
  const len = buf.length;
  let i = 0;

  while (i < len) {
    if ((buf[i] & 0x80) === 0) {
      // 0xxxxxxx
      i++;
    } else if ((buf[i] & 0xe0) === 0xc0) {
      // 110xxxxx 10xxxxxx
      if (
        i + 1 === len ||
        (buf[i + 1] & 0xc0) !== 0x80 ||
        (buf[i] & 0xfe) === 0xc0 // Overlong
      ) {
        return false;
      }

      i += 2;
    } else if ((buf[i] & 0xf0) === 0xe0) {
      // 1110xxxx 10xxxxxx 10xxxxxx
      if (
        i + 2 >= len ||
        (buf[i + 1] & 0xc0) !== 0x80 ||
        (buf[i + 2] & 0xc0) !== 0x80 ||
        (buf[i] === 0xe0 && (buf[i + 1] & 0xe0) === 0x80) || // Overlong
        (buf[i] === 0xed && (buf[i + 1] & 0xe0) === 0xa0) // Surrogate (U+D800 - U+DFFF)
      ) {
        return false;
      }

      i += 3;
    } else if ((buf[i] & 0xf8) === 0xf0) {
      // 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
      if (
        i + 3 >= len ||
        (buf[i + 1] & 0xc0) !== 0x80 ||
        (buf[i + 2] & 0xc0) !== 0x80 ||
        (buf[i + 3] & 0xc0) !== 0x80 ||
        (buf[i] === 0xf0 && (buf[i + 1] & 0xf0) === 0x80) || // Overlong
        (buf[i] === 0xf4 && buf[i + 1] > 0x8f) ||
        buf[i] > 0xf4 // > U+10FFFF
      ) {
        return false;
      }

      i += 4;
    } else {
      return false;
    }
  }

  return true;
}

validation.exports = {
  isValidStatusCode: isValidStatusCode$2,
  isValidUTF8: _isValidUTF8,
  tokenChars: tokenChars$2
};

if (isUtf8) {
  isValidUTF8_1 = validation.exports.isValidUTF8 = function (buf) {
    return buf.length < 24 ? _isValidUTF8(buf) : isUtf8(buf);
  };
} /* istanbul ignore else  */ else if (!process.env.WS_NO_UTF_8_VALIDATE) {
  try {
    const isValidUTF8 = require('utf-8-validate');

    isValidUTF8_1 = validation.exports.isValidUTF8 = function (buf) {
      return buf.length < 32 ? _isValidUTF8(buf) : isValidUTF8(buf);
    };
  } catch (e) {
    // Continue regardless of the error.
  }
}

var validationExports = validation.exports;

const { Writable } = require$$0$2;

const PerMessageDeflate$3 = permessageDeflate;
const {
  BINARY_TYPES: BINARY_TYPES$1,
  EMPTY_BUFFER: EMPTY_BUFFER$2,
  kStatusCode: kStatusCode$1,
  kWebSocket: kWebSocket$2
} = constants;
const { concat, toArrayBuffer, unmask } = bufferUtilExports;
const { isValidStatusCode: isValidStatusCode$1, isValidUTF8 } = validationExports;

const FastBuffer = Buffer[Symbol.species];
const GET_INFO = 0;
const GET_PAYLOAD_LENGTH_16 = 1;
const GET_PAYLOAD_LENGTH_64 = 2;
const GET_MASK = 3;
const GET_DATA = 4;
const INFLATING = 5;

/**
 * HyBi Receiver implementation.
 *
 * @extends Writable
 */
let Receiver$1 = class Receiver extends Writable {
  /**
   * Creates a Receiver instance.
   *
   * @param {Object} [options] Options object
   * @param {String} [options.binaryType=nodebuffer] The type for binary data
   * @param {Object} [options.extensions] An object containing the negotiated
   *     extensions
   * @param {Boolean} [options.isServer=false] Specifies whether to operate in
   *     client or server mode
   * @param {Number} [options.maxPayload=0] The maximum allowed message length
   * @param {Boolean} [options.skipUTF8Validation=false] Specifies whether or
   *     not to skip UTF-8 validation for text and close messages
   */
  constructor(options = {}) {
    super();

    this._binaryType = options.binaryType || BINARY_TYPES$1[0];
    this._extensions = options.extensions || {};
    this._isServer = !!options.isServer;
    this._maxPayload = options.maxPayload | 0;
    this._skipUTF8Validation = !!options.skipUTF8Validation;
    this[kWebSocket$2] = undefined;

    this._bufferedBytes = 0;
    this._buffers = [];

    this._compressed = false;
    this._payloadLength = 0;
    this._mask = undefined;
    this._fragmented = 0;
    this._masked = false;
    this._fin = false;
    this._opcode = 0;

    this._totalPayloadLength = 0;
    this._messageLength = 0;
    this._fragments = [];

    this._state = GET_INFO;
    this._loop = false;
  }

  /**
   * Implements `Writable.prototype._write()`.
   *
   * @param {Buffer} chunk The chunk of data to write
   * @param {String} encoding The character encoding of `chunk`
   * @param {Function} cb Callback
   * @private
   */
  _write(chunk, encoding, cb) {
    if (this._opcode === 0x08 && this._state == GET_INFO) return cb();

    this._bufferedBytes += chunk.length;
    this._buffers.push(chunk);
    this.startLoop(cb);
  }

  /**
   * Consumes `n` bytes from the buffered data.
   *
   * @param {Number} n The number of bytes to consume
   * @return {Buffer} The consumed bytes
   * @private
   */
  consume(n) {
    this._bufferedBytes -= n;

    if (n === this._buffers[0].length) return this._buffers.shift();

    if (n < this._buffers[0].length) {
      const buf = this._buffers[0];
      this._buffers[0] = new FastBuffer(
        buf.buffer,
        buf.byteOffset + n,
        buf.length - n
      );

      return new FastBuffer(buf.buffer, buf.byteOffset, n);
    }

    const dst = Buffer.allocUnsafe(n);

    do {
      const buf = this._buffers[0];
      const offset = dst.length - n;

      if (n >= buf.length) {
        dst.set(this._buffers.shift(), offset);
      } else {
        dst.set(new Uint8Array(buf.buffer, buf.byteOffset, n), offset);
        this._buffers[0] = new FastBuffer(
          buf.buffer,
          buf.byteOffset + n,
          buf.length - n
        );
      }

      n -= buf.length;
    } while (n > 0);

    return dst;
  }

  /**
   * Starts the parsing loop.
   *
   * @param {Function} cb Callback
   * @private
   */
  startLoop(cb) {
    let err;
    this._loop = true;

    do {
      switch (this._state) {
        case GET_INFO:
          err = this.getInfo();
          break;
        case GET_PAYLOAD_LENGTH_16:
          err = this.getPayloadLength16();
          break;
        case GET_PAYLOAD_LENGTH_64:
          err = this.getPayloadLength64();
          break;
        case GET_MASK:
          this.getMask();
          break;
        case GET_DATA:
          err = this.getData(cb);
          break;
        default:
          // `INFLATING`
          this._loop = false;
          return;
      }
    } while (this._loop);

    cb(err);
  }

  /**
   * Reads the first two bytes of a frame.
   *
   * @return {(RangeError|undefined)} A possible error
   * @private
   */
  getInfo() {
    if (this._bufferedBytes < 2) {
      this._loop = false;
      return;
    }

    const buf = this.consume(2);

    if ((buf[0] & 0x30) !== 0x00) {
      this._loop = false;
      return error(
        RangeError,
        'RSV2 and RSV3 must be clear',
        true,
        1002,
        'WS_ERR_UNEXPECTED_RSV_2_3'
      );
    }

    const compressed = (buf[0] & 0x40) === 0x40;

    if (compressed && !this._extensions[PerMessageDeflate$3.extensionName]) {
      this._loop = false;
      return error(
        RangeError,
        'RSV1 must be clear',
        true,
        1002,
        'WS_ERR_UNEXPECTED_RSV_1'
      );
    }

    this._fin = (buf[0] & 0x80) === 0x80;
    this._opcode = buf[0] & 0x0f;
    this._payloadLength = buf[1] & 0x7f;

    if (this._opcode === 0x00) {
      if (compressed) {
        this._loop = false;
        return error(
          RangeError,
          'RSV1 must be clear',
          true,
          1002,
          'WS_ERR_UNEXPECTED_RSV_1'
        );
      }

      if (!this._fragmented) {
        this._loop = false;
        return error(
          RangeError,
          'invalid opcode 0',
          true,
          1002,
          'WS_ERR_INVALID_OPCODE'
        );
      }

      this._opcode = this._fragmented;
    } else if (this._opcode === 0x01 || this._opcode === 0x02) {
      if (this._fragmented) {
        this._loop = false;
        return error(
          RangeError,
          `invalid opcode ${this._opcode}`,
          true,
          1002,
          'WS_ERR_INVALID_OPCODE'
        );
      }

      this._compressed = compressed;
    } else if (this._opcode > 0x07 && this._opcode < 0x0b) {
      if (!this._fin) {
        this._loop = false;
        return error(
          RangeError,
          'FIN must be set',
          true,
          1002,
          'WS_ERR_EXPECTED_FIN'
        );
      }

      if (compressed) {
        this._loop = false;
        return error(
          RangeError,
          'RSV1 must be clear',
          true,
          1002,
          'WS_ERR_UNEXPECTED_RSV_1'
        );
      }

      if (
        this._payloadLength > 0x7d ||
        (this._opcode === 0x08 && this._payloadLength === 1)
      ) {
        this._loop = false;
        return error(
          RangeError,
          `invalid payload length ${this._payloadLength}`,
          true,
          1002,
          'WS_ERR_INVALID_CONTROL_PAYLOAD_LENGTH'
        );
      }
    } else {
      this._loop = false;
      return error(
        RangeError,
        `invalid opcode ${this._opcode}`,
        true,
        1002,
        'WS_ERR_INVALID_OPCODE'
      );
    }

    if (!this._fin && !this._fragmented) this._fragmented = this._opcode;
    this._masked = (buf[1] & 0x80) === 0x80;

    if (this._isServer) {
      if (!this._masked) {
        this._loop = false;
        return error(
          RangeError,
          'MASK must be set',
          true,
          1002,
          'WS_ERR_EXPECTED_MASK'
        );
      }
    } else if (this._masked) {
      this._loop = false;
      return error(
        RangeError,
        'MASK must be clear',
        true,
        1002,
        'WS_ERR_UNEXPECTED_MASK'
      );
    }

    if (this._payloadLength === 126) this._state = GET_PAYLOAD_LENGTH_16;
    else if (this._payloadLength === 127) this._state = GET_PAYLOAD_LENGTH_64;
    else return this.haveLength();
  }

  /**
   * Gets extended payload length (7+16).
   *
   * @return {(RangeError|undefined)} A possible error
   * @private
   */
  getPayloadLength16() {
    if (this._bufferedBytes < 2) {
      this._loop = false;
      return;
    }

    this._payloadLength = this.consume(2).readUInt16BE(0);
    return this.haveLength();
  }

  /**
   * Gets extended payload length (7+64).
   *
   * @return {(RangeError|undefined)} A possible error
   * @private
   */
  getPayloadLength64() {
    if (this._bufferedBytes < 8) {
      this._loop = false;
      return;
    }

    const buf = this.consume(8);
    const num = buf.readUInt32BE(0);

    //
    // The maximum safe integer in JavaScript is 2^53 - 1. An error is returned
    // if payload length is greater than this number.
    //
    if (num > Math.pow(2, 53 - 32) - 1) {
      this._loop = false;
      return error(
        RangeError,
        'Unsupported WebSocket frame: payload length > 2^53 - 1',
        false,
        1009,
        'WS_ERR_UNSUPPORTED_DATA_PAYLOAD_LENGTH'
      );
    }

    this._payloadLength = num * Math.pow(2, 32) + buf.readUInt32BE(4);
    return this.haveLength();
  }

  /**
   * Payload length has been read.
   *
   * @return {(RangeError|undefined)} A possible error
   * @private
   */
  haveLength() {
    if (this._payloadLength && this._opcode < 0x08) {
      this._totalPayloadLength += this._payloadLength;
      if (this._totalPayloadLength > this._maxPayload && this._maxPayload > 0) {
        this._loop = false;
        return error(
          RangeError,
          'Max payload size exceeded',
          false,
          1009,
          'WS_ERR_UNSUPPORTED_MESSAGE_LENGTH'
        );
      }
    }

    if (this._masked) this._state = GET_MASK;
    else this._state = GET_DATA;
  }

  /**
   * Reads mask bytes.
   *
   * @private
   */
  getMask() {
    if (this._bufferedBytes < 4) {
      this._loop = false;
      return;
    }

    this._mask = this.consume(4);
    this._state = GET_DATA;
  }

  /**
   * Reads data bytes.
   *
   * @param {Function} cb Callback
   * @return {(Error|RangeError|undefined)} A possible error
   * @private
   */
  getData(cb) {
    let data = EMPTY_BUFFER$2;

    if (this._payloadLength) {
      if (this._bufferedBytes < this._payloadLength) {
        this._loop = false;
        return;
      }

      data = this.consume(this._payloadLength);

      if (
        this._masked &&
        (this._mask[0] | this._mask[1] | this._mask[2] | this._mask[3]) !== 0
      ) {
        unmask(data, this._mask);
      }
    }

    if (this._opcode > 0x07) return this.controlMessage(data);

    if (this._compressed) {
      this._state = INFLATING;
      this.decompress(data, cb);
      return;
    }

    if (data.length) {
      //
      // This message is not compressed so its length is the sum of the payload
      // length of all fragments.
      //
      this._messageLength = this._totalPayloadLength;
      this._fragments.push(data);
    }

    return this.dataMessage();
  }

  /**
   * Decompresses data.
   *
   * @param {Buffer} data Compressed data
   * @param {Function} cb Callback
   * @private
   */
  decompress(data, cb) {
    const perMessageDeflate = this._extensions[PerMessageDeflate$3.extensionName];

    perMessageDeflate.decompress(data, this._fin, (err, buf) => {
      if (err) return cb(err);

      if (buf.length) {
        this._messageLength += buf.length;
        if (this._messageLength > this._maxPayload && this._maxPayload > 0) {
          return cb(
            error(
              RangeError,
              'Max payload size exceeded',
              false,
              1009,
              'WS_ERR_UNSUPPORTED_MESSAGE_LENGTH'
            )
          );
        }

        this._fragments.push(buf);
      }

      const er = this.dataMessage();
      if (er) return cb(er);

      this.startLoop(cb);
    });
  }

  /**
   * Handles a data message.
   *
   * @return {(Error|undefined)} A possible error
   * @private
   */
  dataMessage() {
    if (this._fin) {
      const messageLength = this._messageLength;
      const fragments = this._fragments;

      this._totalPayloadLength = 0;
      this._messageLength = 0;
      this._fragmented = 0;
      this._fragments = [];

      if (this._opcode === 2) {
        let data;

        if (this._binaryType === 'nodebuffer') {
          data = concat(fragments, messageLength);
        } else if (this._binaryType === 'arraybuffer') {
          data = toArrayBuffer(concat(fragments, messageLength));
        } else {
          data = fragments;
        }

        this.emit('message', data, true);
      } else {
        const buf = concat(fragments, messageLength);

        if (!this._skipUTF8Validation && !isValidUTF8(buf)) {
          this._loop = false;
          return error(
            Error,
            'invalid UTF-8 sequence',
            true,
            1007,
            'WS_ERR_INVALID_UTF8'
          );
        }

        this.emit('message', buf, false);
      }
    }

    this._state = GET_INFO;
  }

  /**
   * Handles a control message.
   *
   * @param {Buffer} data Data to handle
   * @return {(Error|RangeError|undefined)} A possible error
   * @private
   */
  controlMessage(data) {
    if (this._opcode === 0x08) {
      this._loop = false;

      if (data.length === 0) {
        this.emit('conclude', 1005, EMPTY_BUFFER$2);
        this.end();
      } else {
        const code = data.readUInt16BE(0);

        if (!isValidStatusCode$1(code)) {
          return error(
            RangeError,
            `invalid status code ${code}`,
            true,
            1002,
            'WS_ERR_INVALID_CLOSE_CODE'
          );
        }

        const buf = new FastBuffer(
          data.buffer,
          data.byteOffset + 2,
          data.length - 2
        );

        if (!this._skipUTF8Validation && !isValidUTF8(buf)) {
          return error(
            Error,
            'invalid UTF-8 sequence',
            true,
            1007,
            'WS_ERR_INVALID_UTF8'
          );
        }

        this.emit('conclude', code, buf);
        this.end();
      }
    } else if (this._opcode === 0x09) {
      this.emit('ping', data);
    } else {
      this.emit('pong', data);
    }

    this._state = GET_INFO;
  }
};

var receiver = Receiver$1;

/**
 * Builds an error object.
 *
 * @param {function(new:Error|RangeError)} ErrorCtor The error constructor
 * @param {String} message The error message
 * @param {Boolean} prefix Specifies whether or not to add a default prefix to
 *     `message`
 * @param {Number} statusCode The status code
 * @param {String} errorCode The exposed error code
 * @return {(Error|RangeError)} The error
 * @private
 */
function error(ErrorCtor, message, prefix, statusCode, errorCode) {
  const err = new ErrorCtor(
    prefix ? `Invalid WebSocket frame: ${message}` : message
  );

  Error.captureStackTrace(err, error);
  err.code = errorCode;
  err[kStatusCode$1] = statusCode;
  return err;
}

/* eslint no-unused-vars: ["error", { "varsIgnorePattern": "^net|tls$" }] */
const { randomFillSync } = require$$5;

const PerMessageDeflate$2 = permessageDeflate;
const { EMPTY_BUFFER: EMPTY_BUFFER$1 } = constants;
const { isValidStatusCode } = validationExports;
const { mask: applyMask, toBuffer: toBuffer$1 } = bufferUtilExports;

const kByteLength = Symbol('kByteLength');
const maskBuffer = Buffer.alloc(4);

/**
 * HyBi Sender implementation.
 */
let Sender$1 = class Sender {
  /**
   * Creates a Sender instance.
   *
   * @param {(net.Socket|tls.Socket)} socket The connection socket
   * @param {Object} [extensions] An object containing the negotiated extensions
   * @param {Function} [generateMask] The function used to generate the masking
   *     key
   */
  constructor(socket, extensions, generateMask) {
    this._extensions = extensions || {};

    if (generateMask) {
      this._generateMask = generateMask;
      this._maskBuffer = Buffer.alloc(4);
    }

    this._socket = socket;

    this._firstFragment = true;
    this._compress = false;

    this._bufferedBytes = 0;
    this._deflating = false;
    this._queue = [];
  }

  /**
   * Frames a piece of data according to the HyBi WebSocket protocol.
   *
   * @param {(Buffer|String)} data The data to frame
   * @param {Object} options Options object
   * @param {Boolean} [options.fin=false] Specifies whether or not to set the
   *     FIN bit
   * @param {Function} [options.generateMask] The function used to generate the
   *     masking key
   * @param {Boolean} [options.mask=false] Specifies whether or not to mask
   *     `data`
   * @param {Buffer} [options.maskBuffer] The buffer used to store the masking
   *     key
   * @param {Number} options.opcode The opcode
   * @param {Boolean} [options.readOnly=false] Specifies whether `data` can be
   *     modified
   * @param {Boolean} [options.rsv1=false] Specifies whether or not to set the
   *     RSV1 bit
   * @return {(Buffer|String)[]} The framed data
   * @public
   */
  static frame(data, options) {
    let mask;
    let merge = false;
    let offset = 2;
    let skipMasking = false;

    if (options.mask) {
      mask = options.maskBuffer || maskBuffer;

      if (options.generateMask) {
        options.generateMask(mask);
      } else {
        randomFillSync(mask, 0, 4);
      }

      skipMasking = (mask[0] | mask[1] | mask[2] | mask[3]) === 0;
      offset = 6;
    }

    let dataLength;

    if (typeof data === 'string') {
      if (
        (!options.mask || skipMasking) &&
        options[kByteLength] !== undefined
      ) {
        dataLength = options[kByteLength];
      } else {
        data = Buffer.from(data);
        dataLength = data.length;
      }
    } else {
      dataLength = data.length;
      merge = options.mask && options.readOnly && !skipMasking;
    }

    let payloadLength = dataLength;

    if (dataLength >= 65536) {
      offset += 8;
      payloadLength = 127;
    } else if (dataLength > 125) {
      offset += 2;
      payloadLength = 126;
    }

    const target = Buffer.allocUnsafe(merge ? dataLength + offset : offset);

    target[0] = options.fin ? options.opcode | 0x80 : options.opcode;
    if (options.rsv1) target[0] |= 0x40;

    target[1] = payloadLength;

    if (payloadLength === 126) {
      target.writeUInt16BE(dataLength, 2);
    } else if (payloadLength === 127) {
      target[2] = target[3] = 0;
      target.writeUIntBE(dataLength, 4, 6);
    }

    if (!options.mask) return [target, data];

    target[1] |= 0x80;
    target[offset - 4] = mask[0];
    target[offset - 3] = mask[1];
    target[offset - 2] = mask[2];
    target[offset - 1] = mask[3];

    if (skipMasking) return [target, data];

    if (merge) {
      applyMask(data, mask, target, offset, dataLength);
      return [target];
    }

    applyMask(data, mask, data, 0, dataLength);
    return [target, data];
  }

  /**
   * Sends a close message to the other peer.
   *
   * @param {Number} [code] The status code component of the body
   * @param {(String|Buffer)} [data] The message component of the body
   * @param {Boolean} [mask=false] Specifies whether or not to mask the message
   * @param {Function} [cb] Callback
   * @public
   */
  close(code, data, mask, cb) {
    let buf;

    if (code === undefined) {
      buf = EMPTY_BUFFER$1;
    } else if (typeof code !== 'number' || !isValidStatusCode(code)) {
      throw new TypeError('First argument must be a valid error code number');
    } else if (data === undefined || !data.length) {
      buf = Buffer.allocUnsafe(2);
      buf.writeUInt16BE(code, 0);
    } else {
      const length = Buffer.byteLength(data);

      if (length > 123) {
        throw new RangeError('The message must not be greater than 123 bytes');
      }

      buf = Buffer.allocUnsafe(2 + length);
      buf.writeUInt16BE(code, 0);

      if (typeof data === 'string') {
        buf.write(data, 2);
      } else {
        buf.set(data, 2);
      }
    }

    const options = {
      [kByteLength]: buf.length,
      fin: true,
      generateMask: this._generateMask,
      mask,
      maskBuffer: this._maskBuffer,
      opcode: 0x08,
      readOnly: false,
      rsv1: false
    };

    if (this._deflating) {
      this.enqueue([this.dispatch, buf, false, options, cb]);
    } else {
      this.sendFrame(Sender.frame(buf, options), cb);
    }
  }

  /**
   * Sends a ping message to the other peer.
   *
   * @param {*} data The message to send
   * @param {Boolean} [mask=false] Specifies whether or not to mask `data`
   * @param {Function} [cb] Callback
   * @public
   */
  ping(data, mask, cb) {
    let byteLength;
    let readOnly;

    if (typeof data === 'string') {
      byteLength = Buffer.byteLength(data);
      readOnly = false;
    } else {
      data = toBuffer$1(data);
      byteLength = data.length;
      readOnly = toBuffer$1.readOnly;
    }

    if (byteLength > 125) {
      throw new RangeError('The data size must not be greater than 125 bytes');
    }

    const options = {
      [kByteLength]: byteLength,
      fin: true,
      generateMask: this._generateMask,
      mask,
      maskBuffer: this._maskBuffer,
      opcode: 0x09,
      readOnly,
      rsv1: false
    };

    if (this._deflating) {
      this.enqueue([this.dispatch, data, false, options, cb]);
    } else {
      this.sendFrame(Sender.frame(data, options), cb);
    }
  }

  /**
   * Sends a pong message to the other peer.
   *
   * @param {*} data The message to send
   * @param {Boolean} [mask=false] Specifies whether or not to mask `data`
   * @param {Function} [cb] Callback
   * @public
   */
  pong(data, mask, cb) {
    let byteLength;
    let readOnly;

    if (typeof data === 'string') {
      byteLength = Buffer.byteLength(data);
      readOnly = false;
    } else {
      data = toBuffer$1(data);
      byteLength = data.length;
      readOnly = toBuffer$1.readOnly;
    }

    if (byteLength > 125) {
      throw new RangeError('The data size must not be greater than 125 bytes');
    }

    const options = {
      [kByteLength]: byteLength,
      fin: true,
      generateMask: this._generateMask,
      mask,
      maskBuffer: this._maskBuffer,
      opcode: 0x0a,
      readOnly,
      rsv1: false
    };

    if (this._deflating) {
      this.enqueue([this.dispatch, data, false, options, cb]);
    } else {
      this.sendFrame(Sender.frame(data, options), cb);
    }
  }

  /**
   * Sends a data message to the other peer.
   *
   * @param {*} data The message to send
   * @param {Object} options Options object
   * @param {Boolean} [options.binary=false] Specifies whether `data` is binary
   *     or text
   * @param {Boolean} [options.compress=false] Specifies whether or not to
   *     compress `data`
   * @param {Boolean} [options.fin=false] Specifies whether the fragment is the
   *     last one
   * @param {Boolean} [options.mask=false] Specifies whether or not to mask
   *     `data`
   * @param {Function} [cb] Callback
   * @public
   */
  send(data, options, cb) {
    const perMessageDeflate = this._extensions[PerMessageDeflate$2.extensionName];
    let opcode = options.binary ? 2 : 1;
    let rsv1 = options.compress;

    let byteLength;
    let readOnly;

    if (typeof data === 'string') {
      byteLength = Buffer.byteLength(data);
      readOnly = false;
    } else {
      data = toBuffer$1(data);
      byteLength = data.length;
      readOnly = toBuffer$1.readOnly;
    }

    if (this._firstFragment) {
      this._firstFragment = false;
      if (
        rsv1 &&
        perMessageDeflate &&
        perMessageDeflate.params[
          perMessageDeflate._isServer
            ? 'server_no_context_takeover'
            : 'client_no_context_takeover'
        ]
      ) {
        rsv1 = byteLength >= perMessageDeflate._threshold;
      }
      this._compress = rsv1;
    } else {
      rsv1 = false;
      opcode = 0;
    }

    if (options.fin) this._firstFragment = true;

    if (perMessageDeflate) {
      const opts = {
        [kByteLength]: byteLength,
        fin: options.fin,
        generateMask: this._generateMask,
        mask: options.mask,
        maskBuffer: this._maskBuffer,
        opcode,
        readOnly,
        rsv1
      };

      if (this._deflating) {
        this.enqueue([this.dispatch, data, this._compress, opts, cb]);
      } else {
        this.dispatch(data, this._compress, opts, cb);
      }
    } else {
      this.sendFrame(
        Sender.frame(data, {
          [kByteLength]: byteLength,
          fin: options.fin,
          generateMask: this._generateMask,
          mask: options.mask,
          maskBuffer: this._maskBuffer,
          opcode,
          readOnly,
          rsv1: false
        }),
        cb
      );
    }
  }

  /**
   * Dispatches a message.
   *
   * @param {(Buffer|String)} data The message to send
   * @param {Boolean} [compress=false] Specifies whether or not to compress
   *     `data`
   * @param {Object} options Options object
   * @param {Boolean} [options.fin=false] Specifies whether or not to set the
   *     FIN bit
   * @param {Function} [options.generateMask] The function used to generate the
   *     masking key
   * @param {Boolean} [options.mask=false] Specifies whether or not to mask
   *     `data`
   * @param {Buffer} [options.maskBuffer] The buffer used to store the masking
   *     key
   * @param {Number} options.opcode The opcode
   * @param {Boolean} [options.readOnly=false] Specifies whether `data` can be
   *     modified
   * @param {Boolean} [options.rsv1=false] Specifies whether or not to set the
   *     RSV1 bit
   * @param {Function} [cb] Callback
   * @private
   */
  dispatch(data, compress, options, cb) {
    if (!compress) {
      this.sendFrame(Sender.frame(data, options), cb);
      return;
    }

    const perMessageDeflate = this._extensions[PerMessageDeflate$2.extensionName];

    this._bufferedBytes += options[kByteLength];
    this._deflating = true;
    perMessageDeflate.compress(data, options.fin, (_, buf) => {
      if (this._socket.destroyed) {
        const err = new Error(
          'The socket was closed while data was being compressed'
        );

        if (typeof cb === 'function') cb(err);

        for (let i = 0; i < this._queue.length; i++) {
          const params = this._queue[i];
          const callback = params[params.length - 1];

          if (typeof callback === 'function') callback(err);
        }

        return;
      }

      this._bufferedBytes -= options[kByteLength];
      this._deflating = false;
      options.readOnly = false;
      this.sendFrame(Sender.frame(buf, options), cb);
      this.dequeue();
    });
  }

  /**
   * Executes queued send operations.
   *
   * @private
   */
  dequeue() {
    while (!this._deflating && this._queue.length) {
      const params = this._queue.shift();

      this._bufferedBytes -= params[3][kByteLength];
      Reflect.apply(params[0], this, params.slice(1));
    }
  }

  /**
   * Enqueues a send operation.
   *
   * @param {Array} params Send operation parameters.
   * @private
   */
  enqueue(params) {
    this._bufferedBytes += params[3][kByteLength];
    this._queue.push(params);
  }

  /**
   * Sends a frame.
   *
   * @param {Buffer[]} list The frame to send
   * @param {Function} [cb] Callback
   * @private
   */
  sendFrame(list, cb) {
    if (list.length === 2) {
      this._socket.cork();
      this._socket.write(list[0]);
      this._socket.write(list[1], cb);
      this._socket.uncork();
    } else {
      this._socket.write(list[0], cb);
    }
  }
};

var sender = Sender$1;

const { kForOnEventAttribute: kForOnEventAttribute$1, kListener: kListener$1 } = constants;

const kCode = Symbol('kCode');
const kData = Symbol('kData');
const kError = Symbol('kError');
const kMessage = Symbol('kMessage');
const kReason = Symbol('kReason');
const kTarget = Symbol('kTarget');
const kType = Symbol('kType');
const kWasClean = Symbol('kWasClean');

/**
 * Class representing an event.
 */
class Event {
  /**
   * Create a new `Event`.
   *
   * @param {String} type The name of the event
   * @throws {TypeError} If the `type` argument is not specified
   */
  constructor(type) {
    this[kTarget] = null;
    this[kType] = type;
  }

  /**
   * @type {*}
   */
  get target() {
    return this[kTarget];
  }

  /**
   * @type {String}
   */
  get type() {
    return this[kType];
  }
}

Object.defineProperty(Event.prototype, 'target', { enumerable: true });
Object.defineProperty(Event.prototype, 'type', { enumerable: true });

/**
 * Class representing a close event.
 *
 * @extends Event
 */
class CloseEvent extends Event {
  /**
   * Create a new `CloseEvent`.
   *
   * @param {String} type The name of the event
   * @param {Object} [options] A dictionary object that allows for setting
   *     attributes via object members of the same name
   * @param {Number} [options.code=0] The status code explaining why the
   *     connection was closed
   * @param {String} [options.reason=''] A human-readable string explaining why
   *     the connection was closed
   * @param {Boolean} [options.wasClean=false] Indicates whether or not the
   *     connection was cleanly closed
   */
  constructor(type, options = {}) {
    super(type);

    this[kCode] = options.code === undefined ? 0 : options.code;
    this[kReason] = options.reason === undefined ? '' : options.reason;
    this[kWasClean] = options.wasClean === undefined ? false : options.wasClean;
  }

  /**
   * @type {Number}
   */
  get code() {
    return this[kCode];
  }

  /**
   * @type {String}
   */
  get reason() {
    return this[kReason];
  }

  /**
   * @type {Boolean}
   */
  get wasClean() {
    return this[kWasClean];
  }
}

Object.defineProperty(CloseEvent.prototype, 'code', { enumerable: true });
Object.defineProperty(CloseEvent.prototype, 'reason', { enumerable: true });
Object.defineProperty(CloseEvent.prototype, 'wasClean', { enumerable: true });

/**
 * Class representing an error event.
 *
 * @extends Event
 */
class ErrorEvent extends Event {
  /**
   * Create a new `ErrorEvent`.
   *
   * @param {String} type The name of the event
   * @param {Object} [options] A dictionary object that allows for setting
   *     attributes via object members of the same name
   * @param {*} [options.error=null] The error that generated this event
   * @param {String} [options.message=''] The error message
   */
  constructor(type, options = {}) {
    super(type);

    this[kError] = options.error === undefined ? null : options.error;
    this[kMessage] = options.message === undefined ? '' : options.message;
  }

  /**
   * @type {*}
   */
  get error() {
    return this[kError];
  }

  /**
   * @type {String}
   */
  get message() {
    return this[kMessage];
  }
}

Object.defineProperty(ErrorEvent.prototype, 'error', { enumerable: true });
Object.defineProperty(ErrorEvent.prototype, 'message', { enumerable: true });

/**
 * Class representing a message event.
 *
 * @extends Event
 */
class MessageEvent extends Event {
  /**
   * Create a new `MessageEvent`.
   *
   * @param {String} type The name of the event
   * @param {Object} [options] A dictionary object that allows for setting
   *     attributes via object members of the same name
   * @param {*} [options.data=null] The message content
   */
  constructor(type, options = {}) {
    super(type);

    this[kData] = options.data === undefined ? null : options.data;
  }

  /**
   * @type {*}
   */
  get data() {
    return this[kData];
  }
}

Object.defineProperty(MessageEvent.prototype, 'data', { enumerable: true });

/**
 * This provides methods for emulating the `EventTarget` interface. It's not
 * meant to be used directly.
 *
 * @mixin
 */
const EventTarget = {
  /**
   * Register an event listener.
   *
   * @param {String} type A string representing the event type to listen for
   * @param {(Function|Object)} handler The listener to add
   * @param {Object} [options] An options object specifies characteristics about
   *     the event listener
   * @param {Boolean} [options.once=false] A `Boolean` indicating that the
   *     listener should be invoked at most once after being added. If `true`,
   *     the listener would be automatically removed when invoked.
   * @public
   */
  addEventListener(type, handler, options = {}) {
    for (const listener of this.listeners(type)) {
      if (
        !options[kForOnEventAttribute$1] &&
        listener[kListener$1] === handler &&
        !listener[kForOnEventAttribute$1]
      ) {
        return;
      }
    }

    let wrapper;

    if (type === 'message') {
      wrapper = function onMessage(data, isBinary) {
        const event = new MessageEvent('message', {
          data: isBinary ? data : data.toString()
        });

        event[kTarget] = this;
        callListener(handler, this, event);
      };
    } else if (type === 'close') {
      wrapper = function onClose(code, message) {
        const event = new CloseEvent('close', {
          code,
          reason: message.toString(),
          wasClean: this._closeFrameReceived && this._closeFrameSent
        });

        event[kTarget] = this;
        callListener(handler, this, event);
      };
    } else if (type === 'error') {
      wrapper = function onError(error) {
        const event = new ErrorEvent('error', {
          error,
          message: error.message
        });

        event[kTarget] = this;
        callListener(handler, this, event);
      };
    } else if (type === 'open') {
      wrapper = function onOpen() {
        const event = new Event('open');

        event[kTarget] = this;
        callListener(handler, this, event);
      };
    } else {
      return;
    }

    wrapper[kForOnEventAttribute$1] = !!options[kForOnEventAttribute$1];
    wrapper[kListener$1] = handler;

    if (options.once) {
      this.once(type, wrapper);
    } else {
      this.on(type, wrapper);
    }
  },

  /**
   * Remove an event listener.
   *
   * @param {String} type A string representing the event type to remove
   * @param {(Function|Object)} handler The listener to remove
   * @public
   */
  removeEventListener(type, handler) {
    for (const listener of this.listeners(type)) {
      if (listener[kListener$1] === handler && !listener[kForOnEventAttribute$1]) {
        this.removeListener(type, listener);
        break;
      }
    }
  }
};

var eventTarget = {
  CloseEvent,
  ErrorEvent,
  Event,
  EventTarget,
  MessageEvent
};

/**
 * Call an event listener
 *
 * @param {(Function|Object)} listener The listener to call
 * @param {*} thisArg The value to use as `this`` when calling the listener
 * @param {Event} event The event to pass to the listener
 * @private
 */
function callListener(listener, thisArg, event) {
  if (typeof listener === 'object' && listener.handleEvent) {
    listener.handleEvent.call(listener, event);
  } else {
    listener.call(thisArg, event);
  }
}

const { tokenChars: tokenChars$1 } = validationExports;

/**
 * Adds an offer to the map of extension offers or a parameter to the map of
 * parameters.
 *
 * @param {Object} dest The map of extension offers or parameters
 * @param {String} name The extension or parameter name
 * @param {(Object|Boolean|String)} elem The extension parameters or the
 *     parameter value
 * @private
 */
function push(dest, name, elem) {
  if (dest[name] === undefined) dest[name] = [elem];
  else dest[name].push(elem);
}

/**
 * Parses the `Sec-WebSocket-Extensions` header into an object.
 *
 * @param {String} header The field value of the header
 * @return {Object} The parsed object
 * @public
 */
function parse$2(header) {
  const offers = Object.create(null);
  let params = Object.create(null);
  let mustUnescape = false;
  let isEscaping = false;
  let inQuotes = false;
  let extensionName;
  let paramName;
  let start = -1;
  let code = -1;
  let end = -1;
  let i = 0;

  for (; i < header.length; i++) {
    code = header.charCodeAt(i);

    if (extensionName === undefined) {
      if (end === -1 && tokenChars$1[code] === 1) {
        if (start === -1) start = i;
      } else if (
        i !== 0 &&
        (code === 0x20 /* ' ' */ || code === 0x09) /* '\t' */
      ) {
        if (end === -1 && start !== -1) end = i;
      } else if (code === 0x3b /* ';' */ || code === 0x2c /* ',' */) {
        if (start === -1) {
          throw new SyntaxError(`Unexpected character at index ${i}`);
        }

        if (end === -1) end = i;
        const name = header.slice(start, end);
        if (code === 0x2c) {
          push(offers, name, params);
          params = Object.create(null);
        } else {
          extensionName = name;
        }

        start = end = -1;
      } else {
        throw new SyntaxError(`Unexpected character at index ${i}`);
      }
    } else if (paramName === undefined) {
      if (end === -1 && tokenChars$1[code] === 1) {
        if (start === -1) start = i;
      } else if (code === 0x20 || code === 0x09) {
        if (end === -1 && start !== -1) end = i;
      } else if (code === 0x3b || code === 0x2c) {
        if (start === -1) {
          throw new SyntaxError(`Unexpected character at index ${i}`);
        }

        if (end === -1) end = i;
        push(params, header.slice(start, end), true);
        if (code === 0x2c) {
          push(offers, extensionName, params);
          params = Object.create(null);
          extensionName = undefined;
        }

        start = end = -1;
      } else if (code === 0x3d /* '=' */ && start !== -1 && end === -1) {
        paramName = header.slice(start, i);
        start = end = -1;
      } else {
        throw new SyntaxError(`Unexpected character at index ${i}`);
      }
    } else {
      //
      // The value of a quoted-string after unescaping must conform to the
      // token ABNF, so only token characters are valid.
      // Ref: https://tools.ietf.org/html/rfc6455#section-9.1
      //
      if (isEscaping) {
        if (tokenChars$1[code] !== 1) {
          throw new SyntaxError(`Unexpected character at index ${i}`);
        }
        if (start === -1) start = i;
        else if (!mustUnescape) mustUnescape = true;
        isEscaping = false;
      } else if (inQuotes) {
        if (tokenChars$1[code] === 1) {
          if (start === -1) start = i;
        } else if (code === 0x22 /* '"' */ && start !== -1) {
          inQuotes = false;
          end = i;
        } else if (code === 0x5c /* '\' */) {
          isEscaping = true;
        } else {
          throw new SyntaxError(`Unexpected character at index ${i}`);
        }
      } else if (code === 0x22 && header.charCodeAt(i - 1) === 0x3d) {
        inQuotes = true;
      } else if (end === -1 && tokenChars$1[code] === 1) {
        if (start === -1) start = i;
      } else if (start !== -1 && (code === 0x20 || code === 0x09)) {
        if (end === -1) end = i;
      } else if (code === 0x3b || code === 0x2c) {
        if (start === -1) {
          throw new SyntaxError(`Unexpected character at index ${i}`);
        }

        if (end === -1) end = i;
        let value = header.slice(start, end);
        if (mustUnescape) {
          value = value.replace(/\\/g, '');
          mustUnescape = false;
        }
        push(params, paramName, value);
        if (code === 0x2c) {
          push(offers, extensionName, params);
          params = Object.create(null);
          extensionName = undefined;
        }

        paramName = undefined;
        start = end = -1;
      } else {
        throw new SyntaxError(`Unexpected character at index ${i}`);
      }
    }
  }

  if (start === -1 || inQuotes || code === 0x20 || code === 0x09) {
    throw new SyntaxError('Unexpected end of input');
  }

  if (end === -1) end = i;
  const token = header.slice(start, end);
  if (extensionName === undefined) {
    push(offers, token, params);
  } else {
    if (paramName === undefined) {
      push(params, token, true);
    } else if (mustUnescape) {
      push(params, paramName, token.replace(/\\/g, ''));
    } else {
      push(params, paramName, token);
    }
    push(offers, extensionName, params);
  }

  return offers;
}

/**
 * Builds the `Sec-WebSocket-Extensions` header field value.
 *
 * @param {Object} extensions The map of extensions and parameters to format
 * @return {String} A string representing the given object
 * @public
 */
function format$1(extensions) {
  return Object.keys(extensions)
    .map((extension) => {
      let configurations = extensions[extension];
      if (!Array.isArray(configurations)) configurations = [configurations];
      return configurations
        .map((params) => {
          return [extension]
            .concat(
              Object.keys(params).map((k) => {
                let values = params[k];
                if (!Array.isArray(values)) values = [values];
                return values
                  .map((v) => (v === true ? k : `${k}=${v}`))
                  .join('; ');
              })
            )
            .join('; ');
        })
        .join(', ');
    })
    .join(', ');
}

var extension$1 = { format: format$1, parse: parse$2 };

/* eslint no-unused-vars: ["error", { "varsIgnorePattern": "^Readable$" }] */

const EventEmitter$1 = require$$0$3;
const https = require$$1;
const http$1 = require$$2;
const net = require$$3;
const tls = require$$4;
const { randomBytes, createHash: createHash$1 } = require$$5;
const { URL: URL$1 } = require$$7__default;

const PerMessageDeflate$1 = permessageDeflate;
const Receiver = receiver;
const Sender = sender;
const {
  BINARY_TYPES,
  EMPTY_BUFFER,
  GUID: GUID$1,
  kForOnEventAttribute,
  kListener,
  kStatusCode,
  kWebSocket: kWebSocket$1,
  NOOP
} = constants;
const {
  EventTarget: { addEventListener, removeEventListener }
} = eventTarget;
const { format, parse: parse$1 } = extension$1;
const { toBuffer } = bufferUtilExports;

const closeTimeout = 30 * 1000;
const kAborted = Symbol('kAborted');
const protocolVersions = [8, 13];
const readyStates = ['CONNECTING', 'OPEN', 'CLOSING', 'CLOSED'];
const subprotocolRegex = /^[!#$%&'*+\-.0-9A-Z^_`|a-z~]+$/;

/**
 * Class representing a WebSocket.
 *
 * @extends EventEmitter
 */
let WebSocket$1 = class WebSocket extends EventEmitter$1 {
  /**
   * Create a new `WebSocket`.
   *
   * @param {(String|URL)} address The URL to which to connect
   * @param {(String|String[])} [protocols] The subprotocols
   * @param {Object} [options] Connection options
   */
  constructor(address, protocols, options) {
    super();

    this._binaryType = BINARY_TYPES[0];
    this._closeCode = 1006;
    this._closeFrameReceived = false;
    this._closeFrameSent = false;
    this._closeMessage = EMPTY_BUFFER;
    this._closeTimer = null;
    this._extensions = {};
    this._paused = false;
    this._protocol = '';
    this._readyState = WebSocket.CONNECTING;
    this._receiver = null;
    this._sender = null;
    this._socket = null;

    if (address !== null) {
      this._bufferedAmount = 0;
      this._isServer = false;
      this._redirects = 0;

      if (protocols === undefined) {
        protocols = [];
      } else if (!Array.isArray(protocols)) {
        if (typeof protocols === 'object' && protocols !== null) {
          options = protocols;
          protocols = [];
        } else {
          protocols = [protocols];
        }
      }

      initAsClient(this, address, protocols, options);
    } else {
      this._isServer = true;
    }
  }

  /**
   * This deviates from the WHATWG interface since ws doesn't support the
   * required default "blob" type (instead we define a custom "nodebuffer"
   * type).
   *
   * @type {String}
   */
  get binaryType() {
    return this._binaryType;
  }

  set binaryType(type) {
    if (!BINARY_TYPES.includes(type)) return;

    this._binaryType = type;

    //
    // Allow to change `binaryType` on the fly.
    //
    if (this._receiver) this._receiver._binaryType = type;
  }

  /**
   * @type {Number}
   */
  get bufferedAmount() {
    if (!this._socket) return this._bufferedAmount;

    return this._socket._writableState.length + this._sender._bufferedBytes;
  }

  /**
   * @type {String}
   */
  get extensions() {
    return Object.keys(this._extensions).join();
  }

  /**
   * @type {Boolean}
   */
  get isPaused() {
    return this._paused;
  }

  /**
   * @type {Function}
   */
  /* istanbul ignore next */
  get onclose() {
    return null;
  }

  /**
   * @type {Function}
   */
  /* istanbul ignore next */
  get onerror() {
    return null;
  }

  /**
   * @type {Function}
   */
  /* istanbul ignore next */
  get onopen() {
    return null;
  }

  /**
   * @type {Function}
   */
  /* istanbul ignore next */
  get onmessage() {
    return null;
  }

  /**
   * @type {String}
   */
  get protocol() {
    return this._protocol;
  }

  /**
   * @type {Number}
   */
  get readyState() {
    return this._readyState;
  }

  /**
   * @type {String}
   */
  get url() {
    return this._url;
  }

  /**
   * Set up the socket and the internal resources.
   *
   * @param {(net.Socket|tls.Socket)} socket The network socket between the
   *     server and client
   * @param {Buffer} head The first packet of the upgraded stream
   * @param {Object} options Options object
   * @param {Function} [options.generateMask] The function used to generate the
   *     masking key
   * @param {Number} [options.maxPayload=0] The maximum allowed message size
   * @param {Boolean} [options.skipUTF8Validation=false] Specifies whether or
   *     not to skip UTF-8 validation for text and close messages
   * @private
   */
  setSocket(socket, head, options) {
    const receiver = new Receiver({
      binaryType: this.binaryType,
      extensions: this._extensions,
      isServer: this._isServer,
      maxPayload: options.maxPayload,
      skipUTF8Validation: options.skipUTF8Validation
    });

    this._sender = new Sender(socket, this._extensions, options.generateMask);
    this._receiver = receiver;
    this._socket = socket;

    receiver[kWebSocket$1] = this;
    socket[kWebSocket$1] = this;

    receiver.on('conclude', receiverOnConclude);
    receiver.on('drain', receiverOnDrain);
    receiver.on('error', receiverOnError);
    receiver.on('message', receiverOnMessage);
    receiver.on('ping', receiverOnPing);
    receiver.on('pong', receiverOnPong);

    socket.setTimeout(0);
    socket.setNoDelay();

    if (head.length > 0) socket.unshift(head);

    socket.on('close', socketOnClose);
    socket.on('data', socketOnData);
    socket.on('end', socketOnEnd);
    socket.on('error', socketOnError$1);

    this._readyState = WebSocket.OPEN;
    this.emit('open');
  }

  /**
   * Emit the `'close'` event.
   *
   * @private
   */
  emitClose() {
    if (!this._socket) {
      this._readyState = WebSocket.CLOSED;
      this.emit('close', this._closeCode, this._closeMessage);
      return;
    }

    if (this._extensions[PerMessageDeflate$1.extensionName]) {
      this._extensions[PerMessageDeflate$1.extensionName].cleanup();
    }

    this._receiver.removeAllListeners();
    this._readyState = WebSocket.CLOSED;
    this.emit('close', this._closeCode, this._closeMessage);
  }

  /**
   * Start a closing handshake.
   *
   *          +----------+   +-----------+   +----------+
   *     - - -|ws.close()|-->|close frame|-->|ws.close()|- - -
   *    |     +----------+   +-----------+   +----------+     |
   *          +----------+   +-----------+         |
   * CLOSING  |ws.close()|<--|close frame|<--+-----+       CLOSING
   *          +----------+   +-----------+   |
   *    |           |                        |   +---+        |
   *                +------------------------+-->|fin| - - - -
   *    |         +---+                      |   +---+
   *     - - - - -|fin|<---------------------+
   *              +---+
   *
   * @param {Number} [code] Status code explaining why the connection is closing
   * @param {(String|Buffer)} [data] The reason why the connection is
   *     closing
   * @public
   */
  close(code, data) {
    if (this.readyState === WebSocket.CLOSED) return;
    if (this.readyState === WebSocket.CONNECTING) {
      const msg = 'WebSocket was closed before the connection was established';
      abortHandshake$1(this, this._req, msg);
      return;
    }

    if (this.readyState === WebSocket.CLOSING) {
      if (
        this._closeFrameSent &&
        (this._closeFrameReceived || this._receiver._writableState.errorEmitted)
      ) {
        this._socket.end();
      }

      return;
    }

    this._readyState = WebSocket.CLOSING;
    this._sender.close(code, data, !this._isServer, (err) => {
      //
      // This error is handled by the `'error'` listener on the socket. We only
      // want to know if the close frame has been sent here.
      //
      if (err) return;

      this._closeFrameSent = true;

      if (
        this._closeFrameReceived ||
        this._receiver._writableState.errorEmitted
      ) {
        this._socket.end();
      }
    });

    //
    // Specify a timeout for the closing handshake to complete.
    //
    this._closeTimer = setTimeout(
      this._socket.destroy.bind(this._socket),
      closeTimeout
    );
  }

  /**
   * Pause the socket.
   *
   * @public
   */
  pause() {
    if (
      this.readyState === WebSocket.CONNECTING ||
      this.readyState === WebSocket.CLOSED
    ) {
      return;
    }

    this._paused = true;
    this._socket.pause();
  }

  /**
   * Send a ping.
   *
   * @param {*} [data] The data to send
   * @param {Boolean} [mask] Indicates whether or not to mask `data`
   * @param {Function} [cb] Callback which is executed when the ping is sent
   * @public
   */
  ping(data, mask, cb) {
    if (this.readyState === WebSocket.CONNECTING) {
      throw new Error('WebSocket is not open: readyState 0 (CONNECTING)');
    }

    if (typeof data === 'function') {
      cb = data;
      data = mask = undefined;
    } else if (typeof mask === 'function') {
      cb = mask;
      mask = undefined;
    }

    if (typeof data === 'number') data = data.toString();

    if (this.readyState !== WebSocket.OPEN) {
      sendAfterClose(this, data, cb);
      return;
    }

    if (mask === undefined) mask = !this._isServer;
    this._sender.ping(data || EMPTY_BUFFER, mask, cb);
  }

  /**
   * Send a pong.
   *
   * @param {*} [data] The data to send
   * @param {Boolean} [mask] Indicates whether or not to mask `data`
   * @param {Function} [cb] Callback which is executed when the pong is sent
   * @public
   */
  pong(data, mask, cb) {
    if (this.readyState === WebSocket.CONNECTING) {
      throw new Error('WebSocket is not open: readyState 0 (CONNECTING)');
    }

    if (typeof data === 'function') {
      cb = data;
      data = mask = undefined;
    } else if (typeof mask === 'function') {
      cb = mask;
      mask = undefined;
    }

    if (typeof data === 'number') data = data.toString();

    if (this.readyState !== WebSocket.OPEN) {
      sendAfterClose(this, data, cb);
      return;
    }

    if (mask === undefined) mask = !this._isServer;
    this._sender.pong(data || EMPTY_BUFFER, mask, cb);
  }

  /**
   * Resume the socket.
   *
   * @public
   */
  resume() {
    if (
      this.readyState === WebSocket.CONNECTING ||
      this.readyState === WebSocket.CLOSED
    ) {
      return;
    }

    this._paused = false;
    if (!this._receiver._writableState.needDrain) this._socket.resume();
  }

  /**
   * Send a data message.
   *
   * @param {*} data The message to send
   * @param {Object} [options] Options object
   * @param {Boolean} [options.binary] Specifies whether `data` is binary or
   *     text
   * @param {Boolean} [options.compress] Specifies whether or not to compress
   *     `data`
   * @param {Boolean} [options.fin=true] Specifies whether the fragment is the
   *     last one
   * @param {Boolean} [options.mask] Specifies whether or not to mask `data`
   * @param {Function} [cb] Callback which is executed when data is written out
   * @public
   */
  send(data, options, cb) {
    if (this.readyState === WebSocket.CONNECTING) {
      throw new Error('WebSocket is not open: readyState 0 (CONNECTING)');
    }

    if (typeof options === 'function') {
      cb = options;
      options = {};
    }

    if (typeof data === 'number') data = data.toString();

    if (this.readyState !== WebSocket.OPEN) {
      sendAfterClose(this, data, cb);
      return;
    }

    const opts = {
      binary: typeof data !== 'string',
      mask: !this._isServer,
      compress: true,
      fin: true,
      ...options
    };

    if (!this._extensions[PerMessageDeflate$1.extensionName]) {
      opts.compress = false;
    }

    this._sender.send(data || EMPTY_BUFFER, opts, cb);
  }

  /**
   * Forcibly close the connection.
   *
   * @public
   */
  terminate() {
    if (this.readyState === WebSocket.CLOSED) return;
    if (this.readyState === WebSocket.CONNECTING) {
      const msg = 'WebSocket was closed before the connection was established';
      abortHandshake$1(this, this._req, msg);
      return;
    }

    if (this._socket) {
      this._readyState = WebSocket.CLOSING;
      this._socket.destroy();
    }
  }
};

/**
 * @constant {Number} CONNECTING
 * @memberof WebSocket
 */
Object.defineProperty(WebSocket$1, 'CONNECTING', {
  enumerable: true,
  value: readyStates.indexOf('CONNECTING')
});

/**
 * @constant {Number} CONNECTING
 * @memberof WebSocket.prototype
 */
Object.defineProperty(WebSocket$1.prototype, 'CONNECTING', {
  enumerable: true,
  value: readyStates.indexOf('CONNECTING')
});

/**
 * @constant {Number} OPEN
 * @memberof WebSocket
 */
Object.defineProperty(WebSocket$1, 'OPEN', {
  enumerable: true,
  value: readyStates.indexOf('OPEN')
});

/**
 * @constant {Number} OPEN
 * @memberof WebSocket.prototype
 */
Object.defineProperty(WebSocket$1.prototype, 'OPEN', {
  enumerable: true,
  value: readyStates.indexOf('OPEN')
});

/**
 * @constant {Number} CLOSING
 * @memberof WebSocket
 */
Object.defineProperty(WebSocket$1, 'CLOSING', {
  enumerable: true,
  value: readyStates.indexOf('CLOSING')
});

/**
 * @constant {Number} CLOSING
 * @memberof WebSocket.prototype
 */
Object.defineProperty(WebSocket$1.prototype, 'CLOSING', {
  enumerable: true,
  value: readyStates.indexOf('CLOSING')
});

/**
 * @constant {Number} CLOSED
 * @memberof WebSocket
 */
Object.defineProperty(WebSocket$1, 'CLOSED', {
  enumerable: true,
  value: readyStates.indexOf('CLOSED')
});

/**
 * @constant {Number} CLOSED
 * @memberof WebSocket.prototype
 */
Object.defineProperty(WebSocket$1.prototype, 'CLOSED', {
  enumerable: true,
  value: readyStates.indexOf('CLOSED')
});

[
  'binaryType',
  'bufferedAmount',
  'extensions',
  'isPaused',
  'protocol',
  'readyState',
  'url'
].forEach((property) => {
  Object.defineProperty(WebSocket$1.prototype, property, { enumerable: true });
});

//
// Add the `onopen`, `onerror`, `onclose`, and `onmessage` attributes.
// See https://html.spec.whatwg.org/multipage/comms.html#the-websocket-interface
//
['open', 'error', 'close', 'message'].forEach((method) => {
  Object.defineProperty(WebSocket$1.prototype, `on${method}`, {
    enumerable: true,
    get() {
      for (const listener of this.listeners(method)) {
        if (listener[kForOnEventAttribute]) return listener[kListener];
      }

      return null;
    },
    set(handler) {
      for (const listener of this.listeners(method)) {
        if (listener[kForOnEventAttribute]) {
          this.removeListener(method, listener);
          break;
        }
      }

      if (typeof handler !== 'function') return;

      this.addEventListener(method, handler, {
        [kForOnEventAttribute]: true
      });
    }
  });
});

WebSocket$1.prototype.addEventListener = addEventListener;
WebSocket$1.prototype.removeEventListener = removeEventListener;

var websocket = WebSocket$1;

/**
 * Initialize a WebSocket client.
 *
 * @param {WebSocket} websocket The client to initialize
 * @param {(String|URL)} address The URL to which to connect
 * @param {Array} protocols The subprotocols
 * @param {Object} [options] Connection options
 * @param {Boolean} [options.followRedirects=false] Whether or not to follow
 *     redirects
 * @param {Function} [options.generateMask] The function used to generate the
 *     masking key
 * @param {Number} [options.handshakeTimeout] Timeout in milliseconds for the
 *     handshake request
 * @param {Number} [options.maxPayload=104857600] The maximum allowed message
 *     size
 * @param {Number} [options.maxRedirects=10] The maximum number of redirects
 *     allowed
 * @param {String} [options.origin] Value of the `Origin` or
 *     `Sec-WebSocket-Origin` header
 * @param {(Boolean|Object)} [options.perMessageDeflate=true] Enable/disable
 *     permessage-deflate
 * @param {Number} [options.protocolVersion=13] Value of the
 *     `Sec-WebSocket-Version` header
 * @param {Boolean} [options.skipUTF8Validation=false] Specifies whether or
 *     not to skip UTF-8 validation for text and close messages
 * @private
 */
function initAsClient(websocket, address, protocols, options) {
  const opts = {
    protocolVersion: protocolVersions[1],
    maxPayload: 100 * 1024 * 1024,
    skipUTF8Validation: false,
    perMessageDeflate: true,
    followRedirects: false,
    maxRedirects: 10,
    ...options,
    createConnection: undefined,
    socketPath: undefined,
    hostname: undefined,
    protocol: undefined,
    timeout: undefined,
    method: 'GET',
    host: undefined,
    path: undefined,
    port: undefined
  };

  if (!protocolVersions.includes(opts.protocolVersion)) {
    throw new RangeError(
      `Unsupported protocol version: ${opts.protocolVersion} ` +
        `(supported versions: ${protocolVersions.join(', ')})`
    );
  }

  let parsedUrl;

  if (address instanceof URL$1) {
    parsedUrl = address;
    websocket._url = address.href;
  } else {
    try {
      parsedUrl = new URL$1(address);
    } catch (e) {
      throw new SyntaxError(`Invalid URL: ${address}`);
    }

    websocket._url = address;
  }

  const isSecure = parsedUrl.protocol === 'wss:';
  const isIpcUrl = parsedUrl.protocol === 'ws+unix:';
  let invalidUrlMessage;

  if (parsedUrl.protocol !== 'ws:' && !isSecure && !isIpcUrl) {
    invalidUrlMessage =
      'The URL\'s protocol must be one of "ws:", "wss:", or "ws+unix:"';
  } else if (isIpcUrl && !parsedUrl.pathname) {
    invalidUrlMessage = "The URL's pathname is empty";
  } else if (parsedUrl.hash) {
    invalidUrlMessage = 'The URL contains a fragment identifier';
  }

  if (invalidUrlMessage) {
    const err = new SyntaxError(invalidUrlMessage);

    if (websocket._redirects === 0) {
      throw err;
    } else {
      emitErrorAndClose(websocket, err);
      return;
    }
  }

  const defaultPort = isSecure ? 443 : 80;
  const key = randomBytes(16).toString('base64');
  const request = isSecure ? https.request : http$1.request;
  const protocolSet = new Set();
  let perMessageDeflate;

  opts.createConnection = isSecure ? tlsConnect : netConnect;
  opts.defaultPort = opts.defaultPort || defaultPort;
  opts.port = parsedUrl.port || defaultPort;
  opts.host = parsedUrl.hostname.startsWith('[')
    ? parsedUrl.hostname.slice(1, -1)
    : parsedUrl.hostname;
  opts.headers = {
    ...opts.headers,
    'Sec-WebSocket-Version': opts.protocolVersion,
    'Sec-WebSocket-Key': key,
    Connection: 'Upgrade',
    Upgrade: 'websocket'
  };
  opts.path = parsedUrl.pathname + parsedUrl.search;
  opts.timeout = opts.handshakeTimeout;

  if (opts.perMessageDeflate) {
    perMessageDeflate = new PerMessageDeflate$1(
      opts.perMessageDeflate !== true ? opts.perMessageDeflate : {},
      false,
      opts.maxPayload
    );
    opts.headers['Sec-WebSocket-Extensions'] = format({
      [PerMessageDeflate$1.extensionName]: perMessageDeflate.offer()
    });
  }
  if (protocols.length) {
    for (const protocol of protocols) {
      if (
        typeof protocol !== 'string' ||
        !subprotocolRegex.test(protocol) ||
        protocolSet.has(protocol)
      ) {
        throw new SyntaxError(
          'An invalid or duplicated subprotocol was specified'
        );
      }

      protocolSet.add(protocol);
    }

    opts.headers['Sec-WebSocket-Protocol'] = protocols.join(',');
  }
  if (opts.origin) {
    if (opts.protocolVersion < 13) {
      opts.headers['Sec-WebSocket-Origin'] = opts.origin;
    } else {
      opts.headers.Origin = opts.origin;
    }
  }
  if (parsedUrl.username || parsedUrl.password) {
    opts.auth = `${parsedUrl.username}:${parsedUrl.password}`;
  }

  if (isIpcUrl) {
    const parts = opts.path.split(':');

    opts.socketPath = parts[0];
    opts.path = parts[1];
  }

  let req;

  if (opts.followRedirects) {
    if (websocket._redirects === 0) {
      websocket._originalIpc = isIpcUrl;
      websocket._originalSecure = isSecure;
      websocket._originalHostOrSocketPath = isIpcUrl
        ? opts.socketPath
        : parsedUrl.host;

      const headers = options && options.headers;

      //
      // Shallow copy the user provided options so that headers can be changed
      // without mutating the original object.
      //
      options = { ...options, headers: {} };

      if (headers) {
        for (const [key, value] of Object.entries(headers)) {
          options.headers[key.toLowerCase()] = value;
        }
      }
    } else if (websocket.listenerCount('redirect') === 0) {
      const isSameHost = isIpcUrl
        ? websocket._originalIpc
          ? opts.socketPath === websocket._originalHostOrSocketPath
          : false
        : websocket._originalIpc
        ? false
        : parsedUrl.host === websocket._originalHostOrSocketPath;

      if (!isSameHost || (websocket._originalSecure && !isSecure)) {
        //
        // Match curl 7.77.0 behavior and drop the following headers. These
        // headers are also dropped when following a redirect to a subdomain.
        //
        delete opts.headers.authorization;
        delete opts.headers.cookie;

        if (!isSameHost) delete opts.headers.host;

        opts.auth = undefined;
      }
    }

    //
    // Match curl 7.77.0 behavior and make the first `Authorization` header win.
    // If the `Authorization` header is set, then there is nothing to do as it
    // will take precedence.
    //
    if (opts.auth && !options.headers.authorization) {
      options.headers.authorization =
        'Basic ' + Buffer.from(opts.auth).toString('base64');
    }

    req = websocket._req = request(opts);

    if (websocket._redirects) {
      //
      // Unlike what is done for the `'upgrade'` event, no early exit is
      // triggered here if the user calls `websocket.close()` or
      // `websocket.terminate()` from a listener of the `'redirect'` event. This
      // is because the user can also call `request.destroy()` with an error
      // before calling `websocket.close()` or `websocket.terminate()` and this
      // would result in an error being emitted on the `request` object with no
      // `'error'` event listeners attached.
      //
      websocket.emit('redirect', websocket.url, req);
    }
  } else {
    req = websocket._req = request(opts);
  }

  if (opts.timeout) {
    req.on('timeout', () => {
      abortHandshake$1(websocket, req, 'Opening handshake has timed out');
    });
  }

  req.on('error', (err) => {
    if (req === null || req[kAborted]) return;

    req = websocket._req = null;
    emitErrorAndClose(websocket, err);
  });

  req.on('response', (res) => {
    const location = res.headers.location;
    const statusCode = res.statusCode;

    if (
      location &&
      opts.followRedirects &&
      statusCode >= 300 &&
      statusCode < 400
    ) {
      if (++websocket._redirects > opts.maxRedirects) {
        abortHandshake$1(websocket, req, 'Maximum redirects exceeded');
        return;
      }

      req.abort();

      let addr;

      try {
        addr = new URL$1(location, address);
      } catch (e) {
        const err = new SyntaxError(`Invalid URL: ${location}`);
        emitErrorAndClose(websocket, err);
        return;
      }

      initAsClient(websocket, addr, protocols, options);
    } else if (!websocket.emit('unexpected-response', req, res)) {
      abortHandshake$1(
        websocket,
        req,
        `Unexpected server response: ${res.statusCode}`
      );
    }
  });

  req.on('upgrade', (res, socket, head) => {
    websocket.emit('upgrade', res);

    //
    // The user may have closed the connection from a listener of the
    // `'upgrade'` event.
    //
    if (websocket.readyState !== WebSocket$1.CONNECTING) return;

    req = websocket._req = null;

    if (res.headers.upgrade.toLowerCase() !== 'websocket') {
      abortHandshake$1(websocket, socket, 'Invalid Upgrade header');
      return;
    }

    const digest = createHash$1('sha1')
      .update(key + GUID$1)
      .digest('base64');

    if (res.headers['sec-websocket-accept'] !== digest) {
      abortHandshake$1(websocket, socket, 'Invalid Sec-WebSocket-Accept header');
      return;
    }

    const serverProt = res.headers['sec-websocket-protocol'];
    let protError;

    if (serverProt !== undefined) {
      if (!protocolSet.size) {
        protError = 'Server sent a subprotocol but none was requested';
      } else if (!protocolSet.has(serverProt)) {
        protError = 'Server sent an invalid subprotocol';
      }
    } else if (protocolSet.size) {
      protError = 'Server sent no subprotocol';
    }

    if (protError) {
      abortHandshake$1(websocket, socket, protError);
      return;
    }

    if (serverProt) websocket._protocol = serverProt;

    const secWebSocketExtensions = res.headers['sec-websocket-extensions'];

    if (secWebSocketExtensions !== undefined) {
      if (!perMessageDeflate) {
        const message =
          'Server sent a Sec-WebSocket-Extensions header but no extension ' +
          'was requested';
        abortHandshake$1(websocket, socket, message);
        return;
      }

      let extensions;

      try {
        extensions = parse$1(secWebSocketExtensions);
      } catch (err) {
        const message = 'Invalid Sec-WebSocket-Extensions header';
        abortHandshake$1(websocket, socket, message);
        return;
      }

      const extensionNames = Object.keys(extensions);

      if (
        extensionNames.length !== 1 ||
        extensionNames[0] !== PerMessageDeflate$1.extensionName
      ) {
        const message = 'Server indicated an extension that was not requested';
        abortHandshake$1(websocket, socket, message);
        return;
      }

      try {
        perMessageDeflate.accept(extensions[PerMessageDeflate$1.extensionName]);
      } catch (err) {
        const message = 'Invalid Sec-WebSocket-Extensions header';
        abortHandshake$1(websocket, socket, message);
        return;
      }

      websocket._extensions[PerMessageDeflate$1.extensionName] =
        perMessageDeflate;
    }

    websocket.setSocket(socket, head, {
      generateMask: opts.generateMask,
      maxPayload: opts.maxPayload,
      skipUTF8Validation: opts.skipUTF8Validation
    });
  });

  if (opts.finishRequest) {
    opts.finishRequest(req, websocket);
  } else {
    req.end();
  }
}

/**
 * Emit the `'error'` and `'close'` events.
 *
 * @param {WebSocket} websocket The WebSocket instance
 * @param {Error} The error to emit
 * @private
 */
function emitErrorAndClose(websocket, err) {
  websocket._readyState = WebSocket$1.CLOSING;
  websocket.emit('error', err);
  websocket.emitClose();
}

/**
 * Create a `net.Socket` and initiate a connection.
 *
 * @param {Object} options Connection options
 * @return {net.Socket} The newly created socket used to start the connection
 * @private
 */
function netConnect(options) {
  options.path = options.socketPath;
  return net.connect(options);
}

/**
 * Create a `tls.TLSSocket` and initiate a connection.
 *
 * @param {Object} options Connection options
 * @return {tls.TLSSocket} The newly created socket used to start the connection
 * @private
 */
function tlsConnect(options) {
  options.path = undefined;

  if (!options.servername && options.servername !== '') {
    options.servername = net.isIP(options.host) ? '' : options.host;
  }

  return tls.connect(options);
}

/**
 * Abort the handshake and emit an error.
 *
 * @param {WebSocket} websocket The WebSocket instance
 * @param {(http.ClientRequest|net.Socket|tls.Socket)} stream The request to
 *     abort or the socket to destroy
 * @param {String} message The error message
 * @private
 */
function abortHandshake$1(websocket, stream, message) {
  websocket._readyState = WebSocket$1.CLOSING;

  const err = new Error(message);
  Error.captureStackTrace(err, abortHandshake$1);

  if (stream.setHeader) {
    stream[kAborted] = true;
    stream.abort();

    if (stream.socket && !stream.socket.destroyed) {
      //
      // On Node.js >= 14.3.0 `request.abort()` does not destroy the socket if
      // called after the request completed. See
      // https://github.com/websockets/ws/issues/1869.
      //
      stream.socket.destroy();
    }

    process.nextTick(emitErrorAndClose, websocket, err);
  } else {
    stream.destroy(err);
    stream.once('error', websocket.emit.bind(websocket, 'error'));
    stream.once('close', websocket.emitClose.bind(websocket));
  }
}

/**
 * Handle cases where the `ping()`, `pong()`, or `send()` methods are called
 * when the `readyState` attribute is `CLOSING` or `CLOSED`.
 *
 * @param {WebSocket} websocket The WebSocket instance
 * @param {*} [data] The data to send
 * @param {Function} [cb] Callback
 * @private
 */
function sendAfterClose(websocket, data, cb) {
  if (data) {
    const length = toBuffer(data).length;

    //
    // The `_bufferedAmount` property is used only when the peer is a client and
    // the opening handshake fails. Under these circumstances, in fact, the
    // `setSocket()` method is not called, so the `_socket` and `_sender`
    // properties are set to `null`.
    //
    if (websocket._socket) websocket._sender._bufferedBytes += length;
    else websocket._bufferedAmount += length;
  }

  if (cb) {
    const err = new Error(
      `WebSocket is not open: readyState ${websocket.readyState} ` +
        `(${readyStates[websocket.readyState]})`
    );
    process.nextTick(cb, err);
  }
}

/**
 * The listener of the `Receiver` `'conclude'` event.
 *
 * @param {Number} code The status code
 * @param {Buffer} reason The reason for closing
 * @private
 */
function receiverOnConclude(code, reason) {
  const websocket = this[kWebSocket$1];

  websocket._closeFrameReceived = true;
  websocket._closeMessage = reason;
  websocket._closeCode = code;

  if (websocket._socket[kWebSocket$1] === undefined) return;

  websocket._socket.removeListener('data', socketOnData);
  process.nextTick(resume, websocket._socket);

  if (code === 1005) websocket.close();
  else websocket.close(code, reason);
}

/**
 * The listener of the `Receiver` `'drain'` event.
 *
 * @private
 */
function receiverOnDrain() {
  const websocket = this[kWebSocket$1];

  if (!websocket.isPaused) websocket._socket.resume();
}

/**
 * The listener of the `Receiver` `'error'` event.
 *
 * @param {(RangeError|Error)} err The emitted error
 * @private
 */
function receiverOnError(err) {
  const websocket = this[kWebSocket$1];

  if (websocket._socket[kWebSocket$1] !== undefined) {
    websocket._socket.removeListener('data', socketOnData);

    //
    // On Node.js < 14.0.0 the `'error'` event is emitted synchronously. See
    // https://github.com/websockets/ws/issues/1940.
    //
    process.nextTick(resume, websocket._socket);

    websocket.close(err[kStatusCode]);
  }

  websocket.emit('error', err);
}

/**
 * The listener of the `Receiver` `'finish'` event.
 *
 * @private
 */
function receiverOnFinish() {
  this[kWebSocket$1].emitClose();
}

/**
 * The listener of the `Receiver` `'message'` event.
 *
 * @param {Buffer|ArrayBuffer|Buffer[])} data The message
 * @param {Boolean} isBinary Specifies whether the message is binary or not
 * @private
 */
function receiverOnMessage(data, isBinary) {
  this[kWebSocket$1].emit('message', data, isBinary);
}

/**
 * The listener of the `Receiver` `'ping'` event.
 *
 * @param {Buffer} data The data included in the ping frame
 * @private
 */
function receiverOnPing(data) {
  const websocket = this[kWebSocket$1];

  websocket.pong(data, !websocket._isServer, NOOP);
  websocket.emit('ping', data);
}

/**
 * The listener of the `Receiver` `'pong'` event.
 *
 * @param {Buffer} data The data included in the pong frame
 * @private
 */
function receiverOnPong(data) {
  this[kWebSocket$1].emit('pong', data);
}

/**
 * Resume a readable stream
 *
 * @param {Readable} stream The readable stream
 * @private
 */
function resume(stream) {
  stream.resume();
}

/**
 * The listener of the `net.Socket` `'close'` event.
 *
 * @private
 */
function socketOnClose() {
  const websocket = this[kWebSocket$1];

  this.removeListener('close', socketOnClose);
  this.removeListener('data', socketOnData);
  this.removeListener('end', socketOnEnd);

  websocket._readyState = WebSocket$1.CLOSING;

  let chunk;

  //
  // The close frame might not have been received or the `'end'` event emitted,
  // for example, if the socket was destroyed due to an error. Ensure that the
  // `receiver` stream is closed after writing any remaining buffered data to
  // it. If the readable side of the socket is in flowing mode then there is no
  // buffered data as everything has been already written and `readable.read()`
  // will return `null`. If instead, the socket is paused, any possible buffered
  // data will be read as a single chunk.
  //
  if (
    !this._readableState.endEmitted &&
    !websocket._closeFrameReceived &&
    !websocket._receiver._writableState.errorEmitted &&
    (chunk = websocket._socket.read()) !== null
  ) {
    websocket._receiver.write(chunk);
  }

  websocket._receiver.end();

  this[kWebSocket$1] = undefined;

  clearTimeout(websocket._closeTimer);

  if (
    websocket._receiver._writableState.finished ||
    websocket._receiver._writableState.errorEmitted
  ) {
    websocket.emitClose();
  } else {
    websocket._receiver.on('error', receiverOnFinish);
    websocket._receiver.on('finish', receiverOnFinish);
  }
}

/**
 * The listener of the `net.Socket` `'data'` event.
 *
 * @param {Buffer} chunk A chunk of data
 * @private
 */
function socketOnData(chunk) {
  if (!this[kWebSocket$1]._receiver.write(chunk)) {
    this.pause();
  }
}

/**
 * The listener of the `net.Socket` `'end'` event.
 *
 * @private
 */
function socketOnEnd() {
  const websocket = this[kWebSocket$1];

  websocket._readyState = WebSocket$1.CLOSING;
  websocket._receiver.end();
  this.end();
}

/**
 * The listener of the `net.Socket` `'error'` event.
 *
 * @private
 */
function socketOnError$1() {
  const websocket = this[kWebSocket$1];

  this.removeListener('error', socketOnError$1);
  this.on('error', NOOP);

  if (websocket) {
    websocket._readyState = WebSocket$1.CLOSING;
    this.destroy();
  }
}

var WebSocket$2 = /*@__PURE__*/getDefaultExportFromCjs(websocket);

const { tokenChars } = validationExports;

/**
 * Parses the `Sec-WebSocket-Protocol` header into a set of subprotocol names.
 *
 * @param {String} header The field value of the header
 * @return {Set} The subprotocol names
 * @public
 */
function parse(header) {
  const protocols = new Set();
  let start = -1;
  let end = -1;
  let i = 0;

  for (i; i < header.length; i++) {
    const code = header.charCodeAt(i);

    if (end === -1 && tokenChars[code] === 1) {
      if (start === -1) start = i;
    } else if (
      i !== 0 &&
      (code === 0x20 /* ' ' */ || code === 0x09) /* '\t' */
    ) {
      if (end === -1 && start !== -1) end = i;
    } else if (code === 0x2c /* ',' */) {
      if (start === -1) {
        throw new SyntaxError(`Unexpected character at index ${i}`);
      }

      if (end === -1) end = i;

      const protocol = header.slice(start, end);

      if (protocols.has(protocol)) {
        throw new SyntaxError(`The "${protocol}" subprotocol is duplicated`);
      }

      protocols.add(protocol);
      start = end = -1;
    } else {
      throw new SyntaxError(`Unexpected character at index ${i}`);
    }
  }

  if (start === -1 || end !== -1) {
    throw new SyntaxError('Unexpected end of input');
  }

  const protocol = header.slice(start, i);

  if (protocols.has(protocol)) {
    throw new SyntaxError(`The "${protocol}" subprotocol is duplicated`);
  }

  protocols.add(protocol);
  return protocols;
}

var subprotocol$1 = { parse };

/* eslint no-unused-vars: ["error", { "varsIgnorePattern": "^net|tls|https$" }] */

const EventEmitter = require$$0$3;
const http = require$$2;
const { createHash } = require$$5;

const extension = extension$1;
const PerMessageDeflate = permessageDeflate;
const subprotocol = subprotocol$1;
const WebSocket = websocket;
const { GUID, kWebSocket } = constants;

const keyRegex = /^[+/0-9A-Za-z]{22}==$/;

const RUNNING = 0;
const CLOSING = 1;
const CLOSED = 2;

/**
 * Class representing a WebSocket server.
 *
 * @extends EventEmitter
 */
class WebSocketServer extends EventEmitter {
  /**
   * Create a `WebSocketServer` instance.
   *
   * @param {Object} options Configuration options
   * @param {Number} [options.backlog=511] The maximum length of the queue of
   *     pending connections
   * @param {Boolean} [options.clientTracking=true] Specifies whether or not to
   *     track clients
   * @param {Function} [options.handleProtocols] A hook to handle protocols
   * @param {String} [options.host] The hostname where to bind the server
   * @param {Number} [options.maxPayload=104857600] The maximum allowed message
   *     size
   * @param {Boolean} [options.noServer=false] Enable no server mode
   * @param {String} [options.path] Accept only connections matching this path
   * @param {(Boolean|Object)} [options.perMessageDeflate=false] Enable/disable
   *     permessage-deflate
   * @param {Number} [options.port] The port where to bind the server
   * @param {(http.Server|https.Server)} [options.server] A pre-created HTTP/S
   *     server to use
   * @param {Boolean} [options.skipUTF8Validation=false] Specifies whether or
   *     not to skip UTF-8 validation for text and close messages
   * @param {Function} [options.verifyClient] A hook to reject connections
   * @param {Function} [options.WebSocket=WebSocket] Specifies the `WebSocket`
   *     class to use. It must be the `WebSocket` class or class that extends it
   * @param {Function} [callback] A listener for the `listening` event
   */
  constructor(options, callback) {
    super();

    options = {
      maxPayload: 100 * 1024 * 1024,
      skipUTF8Validation: false,
      perMessageDeflate: false,
      handleProtocols: null,
      clientTracking: true,
      verifyClient: null,
      noServer: false,
      backlog: null, // use default (511 as implemented in net.js)
      server: null,
      host: null,
      path: null,
      port: null,
      WebSocket,
      ...options
    };

    if (
      (options.port == null && !options.server && !options.noServer) ||
      (options.port != null && (options.server || options.noServer)) ||
      (options.server && options.noServer)
    ) {
      throw new TypeError(
        'One and only one of the "port", "server", or "noServer" options ' +
          'must be specified'
      );
    }

    if (options.port != null) {
      this._server = http.createServer((req, res) => {
        const body = http.STATUS_CODES[426];

        res.writeHead(426, {
          'Content-Length': body.length,
          'Content-Type': 'text/plain'
        });
        res.end(body);
      });
      this._server.listen(
        options.port,
        options.host,
        options.backlog,
        callback
      );
    } else if (options.server) {
      this._server = options.server;
    }

    if (this._server) {
      const emitConnection = this.emit.bind(this, 'connection');

      this._removeListeners = addListeners(this._server, {
        listening: this.emit.bind(this, 'listening'),
        error: this.emit.bind(this, 'error'),
        upgrade: (req, socket, head) => {
          this.handleUpgrade(req, socket, head, emitConnection);
        }
      });
    }

    if (options.perMessageDeflate === true) options.perMessageDeflate = {};
    if (options.clientTracking) {
      this.clients = new Set();
      this._shouldEmitClose = false;
    }

    this.options = options;
    this._state = RUNNING;
  }

  /**
   * Returns the bound address, the address family name, and port of the server
   * as reported by the operating system if listening on an IP socket.
   * If the server is listening on a pipe or UNIX domain socket, the name is
   * returned as a string.
   *
   * @return {(Object|String|null)} The address of the server
   * @public
   */
  address() {
    if (this.options.noServer) {
      throw new Error('The server is operating in "noServer" mode');
    }

    if (!this._server) return null;
    return this._server.address();
  }

  /**
   * Stop the server from accepting new connections and emit the `'close'` event
   * when all existing connections are closed.
   *
   * @param {Function} [cb] A one-time listener for the `'close'` event
   * @public
   */
  close(cb) {
    if (this._state === CLOSED) {
      if (cb) {
        this.once('close', () => {
          cb(new Error('The server is not running'));
        });
      }

      process.nextTick(emitClose, this);
      return;
    }

    if (cb) this.once('close', cb);

    if (this._state === CLOSING) return;
    this._state = CLOSING;

    if (this.options.noServer || this.options.server) {
      if (this._server) {
        this._removeListeners();
        this._removeListeners = this._server = null;
      }

      if (this.clients) {
        if (!this.clients.size) {
          process.nextTick(emitClose, this);
        } else {
          this._shouldEmitClose = true;
        }
      } else {
        process.nextTick(emitClose, this);
      }
    } else {
      const server = this._server;

      this._removeListeners();
      this._removeListeners = this._server = null;

      //
      // The HTTP/S server was created internally. Close it, and rely on its
      // `'close'` event.
      //
      server.close(() => {
        emitClose(this);
      });
    }
  }

  /**
   * See if a given request should be handled by this server instance.
   *
   * @param {http.IncomingMessage} req Request object to inspect
   * @return {Boolean} `true` if the request is valid, else `false`
   * @public
   */
  shouldHandle(req) {
    if (this.options.path) {
      const index = req.url.indexOf('?');
      const pathname = index !== -1 ? req.url.slice(0, index) : req.url;

      if (pathname !== this.options.path) return false;
    }

    return true;
  }

  /**
   * Handle a HTTP Upgrade request.
   *
   * @param {http.IncomingMessage} req The request object
   * @param {(net.Socket|tls.Socket)} socket The network socket between the
   *     server and client
   * @param {Buffer} head The first packet of the upgraded stream
   * @param {Function} cb Callback
   * @public
   */
  handleUpgrade(req, socket, head, cb) {
    socket.on('error', socketOnError);

    const key = req.headers['sec-websocket-key'];
    const version = +req.headers['sec-websocket-version'];

    if (req.method !== 'GET') {
      const message = 'Invalid HTTP method';
      abortHandshakeOrEmitwsClientError(this, req, socket, 405, message);
      return;
    }

    if (req.headers.upgrade.toLowerCase() !== 'websocket') {
      const message = 'Invalid Upgrade header';
      abortHandshakeOrEmitwsClientError(this, req, socket, 400, message);
      return;
    }

    if (!key || !keyRegex.test(key)) {
      const message = 'Missing or invalid Sec-WebSocket-Key header';
      abortHandshakeOrEmitwsClientError(this, req, socket, 400, message);
      return;
    }

    if (version !== 8 && version !== 13) {
      const message = 'Missing or invalid Sec-WebSocket-Version header';
      abortHandshakeOrEmitwsClientError(this, req, socket, 400, message);
      return;
    }

    if (!this.shouldHandle(req)) {
      abortHandshake(socket, 400);
      return;
    }

    const secWebSocketProtocol = req.headers['sec-websocket-protocol'];
    let protocols = new Set();

    if (secWebSocketProtocol !== undefined) {
      try {
        protocols = subprotocol.parse(secWebSocketProtocol);
      } catch (err) {
        const message = 'Invalid Sec-WebSocket-Protocol header';
        abortHandshakeOrEmitwsClientError(this, req, socket, 400, message);
        return;
      }
    }

    const secWebSocketExtensions = req.headers['sec-websocket-extensions'];
    const extensions = {};

    if (
      this.options.perMessageDeflate &&
      secWebSocketExtensions !== undefined
    ) {
      const perMessageDeflate = new PerMessageDeflate(
        this.options.perMessageDeflate,
        true,
        this.options.maxPayload
      );

      try {
        const offers = extension.parse(secWebSocketExtensions);

        if (offers[PerMessageDeflate.extensionName]) {
          perMessageDeflate.accept(offers[PerMessageDeflate.extensionName]);
          extensions[PerMessageDeflate.extensionName] = perMessageDeflate;
        }
      } catch (err) {
        const message =
          'Invalid or unacceptable Sec-WebSocket-Extensions header';
        abortHandshakeOrEmitwsClientError(this, req, socket, 400, message);
        return;
      }
    }

    //
    // Optionally call external client verification handler.
    //
    if (this.options.verifyClient) {
      const info = {
        origin:
          req.headers[`${version === 8 ? 'sec-websocket-origin' : 'origin'}`],
        secure: !!(req.socket.authorized || req.socket.encrypted),
        req
      };

      if (this.options.verifyClient.length === 2) {
        this.options.verifyClient(info, (verified, code, message, headers) => {
          if (!verified) {
            return abortHandshake(socket, code || 401, message, headers);
          }

          this.completeUpgrade(
            extensions,
            key,
            protocols,
            req,
            socket,
            head,
            cb
          );
        });
        return;
      }

      if (!this.options.verifyClient(info)) return abortHandshake(socket, 401);
    }

    this.completeUpgrade(extensions, key, protocols, req, socket, head, cb);
  }

  /**
   * Upgrade the connection to WebSocket.
   *
   * @param {Object} extensions The accepted extensions
   * @param {String} key The value of the `Sec-WebSocket-Key` header
   * @param {Set} protocols The subprotocols
   * @param {http.IncomingMessage} req The request object
   * @param {(net.Socket|tls.Socket)} socket The network socket between the
   *     server and client
   * @param {Buffer} head The first packet of the upgraded stream
   * @param {Function} cb Callback
   * @throws {Error} If called more than once with the same socket
   * @private
   */
  completeUpgrade(extensions, key, protocols, req, socket, head, cb) {
    //
    // Destroy the socket if the client has already sent a FIN packet.
    //
    if (!socket.readable || !socket.writable) return socket.destroy();

    if (socket[kWebSocket]) {
      throw new Error(
        'server.handleUpgrade() was called more than once with the same ' +
          'socket, possibly due to a misconfiguration'
      );
    }

    if (this._state > RUNNING) return abortHandshake(socket, 503);

    const digest = createHash('sha1')
      .update(key + GUID)
      .digest('base64');

    const headers = [
      'HTTP/1.1 101 Switching Protocols',
      'Upgrade: websocket',
      'Connection: Upgrade',
      `Sec-WebSocket-Accept: ${digest}`
    ];

    const ws = new this.options.WebSocket(null);

    if (protocols.size) {
      //
      // Optionally call external protocol selection handler.
      //
      const protocol = this.options.handleProtocols
        ? this.options.handleProtocols(protocols, req)
        : protocols.values().next().value;

      if (protocol) {
        headers.push(`Sec-WebSocket-Protocol: ${protocol}`);
        ws._protocol = protocol;
      }
    }

    if (extensions[PerMessageDeflate.extensionName]) {
      const params = extensions[PerMessageDeflate.extensionName].params;
      const value = extension.format({
        [PerMessageDeflate.extensionName]: [params]
      });
      headers.push(`Sec-WebSocket-Extensions: ${value}`);
      ws._extensions = extensions;
    }

    //
    // Allow external modification/inspection of handshake headers.
    //
    this.emit('headers', headers, req);

    socket.write(headers.concat('\r\n').join('\r\n'));
    socket.removeListener('error', socketOnError);

    ws.setSocket(socket, head, {
      maxPayload: this.options.maxPayload,
      skipUTF8Validation: this.options.skipUTF8Validation
    });

    if (this.clients) {
      this.clients.add(ws);
      ws.on('close', () => {
        this.clients.delete(ws);

        if (this._shouldEmitClose && !this.clients.size) {
          process.nextTick(emitClose, this);
        }
      });
    }

    cb(ws, req);
  }
}

var websocketServer = WebSocketServer;

/**
 * Add event listeners on an `EventEmitter` using a map of <event, listener>
 * pairs.
 *
 * @param {EventEmitter} server The event emitter
 * @param {Object.<String, Function>} map The listeners to add
 * @return {Function} A function that will remove the added listeners when
 *     called
 * @private
 */
function addListeners(server, map) {
  for (const event of Object.keys(map)) server.on(event, map[event]);

  return function removeListeners() {
    for (const event of Object.keys(map)) {
      server.removeListener(event, map[event]);
    }
  };
}

/**
 * Emit a `'close'` event on an `EventEmitter`.
 *
 * @param {EventEmitter} server The event emitter
 * @private
 */
function emitClose(server) {
  server._state = CLOSED;
  server.emit('close');
}

/**
 * Handle socket errors.
 *
 * @private
 */
function socketOnError() {
  this.destroy();
}

/**
 * Close the connection when preconditions are not fulfilled.
 *
 * @param {(net.Socket|tls.Socket)} socket The socket of the upgrade request
 * @param {Number} code The HTTP response status code
 * @param {String} [message] The HTTP response body
 * @param {Object} [headers] Additional HTTP response headers
 * @private
 */
function abortHandshake(socket, code, message, headers) {
  //
  // The socket is writable unless the user destroyed or ended it before calling
  // `server.handleUpgrade()` or in the `verifyClient` function, which is a user
  // error. Handling this does not make much sense as the worst that can happen
  // is that some of the data written by the user might be discarded due to the
  // call to `socket.end()` below, which triggers an `'error'` event that in
  // turn causes the socket to be destroyed.
  //
  message = message || http.STATUS_CODES[code];
  headers = {
    Connection: 'close',
    'Content-Type': 'text/html',
    'Content-Length': Buffer.byteLength(message),
    ...headers
  };

  socket.once('finish', socket.destroy);

  socket.end(
    `HTTP/1.1 ${code} ${http.STATUS_CODES[code]}\r\n` +
      Object.keys(headers)
        .map((h) => `${h}: ${headers[h]}`)
        .join('\r\n') +
      '\r\n\r\n' +
      message
  );
}

/**
 * Emit a `'wsClientError'` event on a `WebSocketServer` if there is at least
 * one listener for it, otherwise call `abortHandshake()`.
 *
 * @param {WebSocketServer} server The WebSocket server
 * @param {http.IncomingMessage} req The request object
 * @param {(net.Socket|tls.Socket)} socket The socket of the upgrade request
 * @param {Number} code The HTTP response status code
 * @param {String} message The HTTP response body
 * @private
 */
function abortHandshakeOrEmitwsClientError(server, req, socket, code, message) {
  if (server.listenerCount('wsClientError')) {
    const err = new Error(message);
    Error.captureStackTrace(err, abortHandshakeOrEmitwsClientError);

    server.emit('wsClientError', err, socket, req);
  } else {
    abortHandshake(socket, code, message);
  }
}

var WebSocketServer$1 = /*@__PURE__*/getDefaultExportFromCjs(websocketServer);

const GLOBAL_WEB_SOCKET_SERVER_KEY = Symbol.for('sveltekit.web-socket-server');
/**
 * A modified version of the WebSocket that contains additional information about
 * the game and user.
 *
 * The `WebSocketServer` uses this class when instantiating a new web socket
 * connection.
 */
class ExtendedWebSocket extends WebSocket$2 {
    socketId = '';
    gameId = '';
    userId = '';
}
/**
 * This gets called exactly once when the server starts (production and dev) and
 * stores the web socket server in the global object.
 */
const createGlobalWebSocketServer = () => {
    const webSocketServer = new WebSocketServer$1({ noServer: true, WebSocket: ExtendedWebSocket });
    globalThis[GLOBAL_WEB_SOCKET_SERVER_KEY] = webSocketServer;
    return webSocketServer;
};
/**
 * Returns the global web socket server.
 *
 * **NOTE:** You should not need to use this in the app / routes. Instead, you
 * should access the global instance via `event.locals.webSocketServer`.
 *
 * This assumes that `createGlobalWebSocketServer()` has already been called,
 * and will throw if not.
 */
const getGlobalWebSocketServer = () => {
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    const webSocketServer = globalThis[GLOBAL_WEB_SOCKET_SERVER_KEY];
    if (!webSocketServer)
        throw new Error('There is no global WebSocket server');
    return webSocketServer;
};

/**
 * The callback function for `server.on('upgrade', callback)`
 *
 * See: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Upgrade
 */
const upgradeHttpConnection = (req, sock, head) => {
    try {
        const url = req.url ? new URL(req.url, 'http://localhost') : undefined;
        const pathname = url?.pathname;
        if (!url || pathname !== '/websocket')
            return;
        const gameId = url.searchParams.get('gameId');
        const userId = url.searchParams.get('userId');
        if (!gameId)
            throw new Error('No gameId provided');
        if (!userId)
            throw new Error('No userId provided');
        const webSocketServer = getGlobalWebSocketServer();
        webSocketServer.handleUpgrade(req, sock, head, (webSocket) => {
            webSocket.socketId = crypto.randomUUID();
            webSocket.gameId = gameId;
            webSocket.userId = userId;
            webSocketServer.emit('connection', webSocket, req);
        });
    }
    catch (e) {
        console.error('Unable to upgrade http connection:', e);
    }
};

// This file will be bundled with rollup, and be put in the build/ directory.
// Then inside this directory, the app can be run with `npm run start`


const __filename = require$$7.fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

createGlobalWebSocketServer();

const { server } = await import(path.resolve(__dirname, './index.js'));
server.server.on('upgrade', upgradeHttpConnection);