Function constructor

packages/engine.io/lib/server.ts:187–237

* Server constructor. * * @param {Object} opts - options

(opts: ServerOptions = {})

   * @param {Object} opts - options
   */
  constructor(opts: ServerOptions = {}) {
    super();

    this.clients = {};
    this.clientsCount = 0;

    this.opts = Object.assign(
      {
        wsEngine: DEFAULT_WS_ENGINE,
        pingTimeout: 20000,
        pingInterval: 25000,
        upgradeTimeout: 10000,
        maxHttpBufferSize: 1e6,
        transports: ["polling", "websocket"], // WebTransport is disabled by default
        allowUpgrades: true,
        httpCompression: {
          threshold: 1024,
        },
        cors: false,
        allowEIO3: false,
      },
      opts,
    );

    if (opts.cookie) {
      this.opts.cookie = Object.assign(
        {
          name: "io",
          path: "/",
          httpOnly: true,
          sameSite: "lax",
        },
        opts.cookie,
      );
    }

    if (this.opts.cors) {
      this.use(require("cors")(this.opts.cors));
    }

    if (opts.perMessageDeflate) {
      this.opts.perMessageDeflate = Object.assign(
        {
          threshold: 1024,
        },
        opts.perMessageDeflate,
      );
    }

    this.init();
  }

  protected abstract init(): void;