1 files changed, 0 insertions, 447 deletions
diff --git a/school/node_modules/ws/lib/websocket-server.js b/school/node_modules/ws/lib/websocket-server.js
deleted file mode 100644
index fe7fdf5..0000000
--- a/school/node_modules/ws/lib/websocket-server.js
+++ /dev/null
@@ -1,447 +0,0 @@
-/* eslint no-unused-vars: ["error", { "varsIgnorePattern": "^net|tls|https$" }] */
-
-'use strict';
-
-const EventEmitter = require('events');
-const http = require('http');
-const https = require('https');
-const net = require('net');
-const tls = require('tls');
-const { createHash } = require('crypto');
-
-const PerMessageDeflate = require('./permessage-deflate');
-const WebSocket = require('./websocket');
-const { format, parse } = require('./extension');
-const { GUID, kWebSocket } = require('./constants');
-
-const keyRegex = /^[+/0-9A-Za-z]{22}==$/;
-
-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 {Function} [options.verifyClient] A hook to reject connections
-   * @param {Function} [callback] A listener for the `listening` event
-   */
-  constructor(options, callback) {
-    super();
-
-    options = {
-      maxPayload: 100 * 1024 * 1024,
-      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,
-      ...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.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();
-  }
-
-  /**
-   * Close the server.
-   *
-   * @param {Function} [cb] Callback
-   * @public
-   */
-  close(cb) {
-    if (cb) this.once('close', cb);
-
-    if (this._state === CLOSED) {
-      process.nextTick(emitClose, this);
-      return;
-    }
-
-    if (this._state === CLOSING) return;
-    this._state = CLOSING;
-
-    //
-    // Terminate all associated clients.
-    //
-    if (this.clients) {
-      for (const client of this.clients) client.terminate();
-    }
-
-    const server = this._server;
-
-    if (server) {
-      this._removeListeners();
-      this._removeListeners = this._server = null;
-
-      //
-      // Close the http server if it was internally created.
-      //
-      if (this.options.port != null) {
-        server.close(emitClose.bind(undefined, this));
-        return;
-      }
-    }
-
-    process.nextTick(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'] !== undefined
-        ? req.headers['sec-websocket-key'].trim()
-        : false;
-    const version = +req.headers['sec-websocket-version'];
-    const extensions = {};
-
-    if (
-      req.method !== 'GET' ||
-      req.headers.upgrade.toLowerCase() !== 'websocket' ||
-      !key ||
-      !keyRegex.test(key) ||
-      (version !== 8 && version !== 13) ||
-      !this.shouldHandle(req)
-    ) {
-      return abortHandshake(socket, 400);
-    }
-
-    if (this.options.perMessageDeflate) {
-      const perMessageDeflate = new PerMessageDeflate(
-        this.options.perMessageDeflate,
-        true,
-        this.options.maxPayload
-      );
-
-      try {
-        const offers = parse(req.headers['sec-websocket-extensions']);
-
-        if (offers[PerMessageDeflate.extensionName]) {
-          perMessageDeflate.accept(offers[PerMessageDeflate.extensionName]);
-          extensions[PerMessageDeflate.extensionName] = perMessageDeflate;
-        }
-      } catch (err) {
-        return abortHandshake(socket, 400);
-      }
-    }
-
-    //
-    // 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(key, extensions, req, socket, head, cb);
-        });
-        return;
-      }
-
-      if (!this.options.verifyClient(info)) return abortHandshake(socket, 401);
-    }
-
-    this.completeUpgrade(key, extensions, req, socket, head, cb);
-  }
-
-  /**
-   * Upgrade the connection to WebSocket.
-   *
-   * @param {String} key The value of the `Sec-WebSocket-Key` header
-   * @param {Object} extensions The accepted extensions
-   * @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(key, extensions, 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 WebSocket(null);
-    let protocol = req.headers['sec-websocket-protocol'];
-
-    if (protocol) {
-      protocol = protocol.split(',').map(trim);
-
-      //
-      // Optionally call external protocol selection handler.
-      //
-      if (this.options.handleProtocols) {
-        protocol = this.options.handleProtocols(protocol, req);
-      } else {
-        protocol = protocol[0];
-      }
-
-      if (protocol) {
-        headers.push(`Sec-WebSocket-Protocol: ${protocol}`);
-        ws._protocol = protocol;
-      }
-    }
-
-    if (extensions[PerMessageDeflate.extensionName]) {
-      const params = extensions[PerMessageDeflate.extensionName].params;
-      const value = 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, this.options.maxPayload);
-
-    if (this.clients) {
-      this.clients.add(ws);
-      ws.on('close', () => this.clients.delete(ws));
-    }
-
-    cb(ws, req);
-  }
-}
-
-module.exports = 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 premature 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) {
-  if (socket.writable) {
-    message = message || http.STATUS_CODES[code];
-    headers = {
-      Connection: 'close',
-      'Content-Type': 'text/html',
-      'Content-Length': Buffer.byteLength(message),
-      ...headers
-    };
-
-    socket.write(
-      `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
-    );
-  }
-
-  socket.removeListener('error', socketOnError);
-  socket.destroy();
-}
-
-/**
- * Remove whitespace characters from both ends of a string.
- *
- * @param {String} str The string
- * @return {String} A new string representing `str` stripped of whitespace
- *     characters from both its beginning and end
- * @private
- */
-function trim(str) {
-  return str.trim();
-}