@colyseus/ws-transport/build/WebSocketTransport.mjs

```typescript import { Server } from "@colyseus/core"; import { WebSocketTransport } from "@colyseus/ws-transport";

// packages/transport/ws-transport/src/WebSocketTransport.ts
import http from "http";
import { URL } from "url";
import { WebSocketServer } from "ws";
import { matchMaker, Protocol, Transport, debugAndPrintError, debugConnection, getBearerToken } from "@colyseus/core";
import { WebSocketClient } from "./WebSocketClient.mjs";
function noop() {
}
function heartbeat() {
  this.pingCount = 0;
}
var WebSocketTransport = class extends Transport {
  constructor(options = {}) {
    super();
    this._originalSend = null;
    if (options.maxPayload === void 0) {
      options.maxPayload = 4 * 1024;
    }
    if (options.perMessageDeflate === void 0) {
      options.perMessageDeflate = false;
    }
    this.pingIntervalMS = options.pingInterval !== void 0 ? options.pingInterval : 3e3;
    this.pingMaxRetries = options.pingMaxRetries !== void 0 ? options.pingMaxRetries : 2;
    if (!options.server && !options.noServer) {
      options.server = http.createServer();
    }
    this.wss = new WebSocketServer(options);
    this.wss.on("connection", this.onConnection);
    this.wss.on("error", (err) => debugAndPrintError(err));
    this.server = options.server;
    if (this.pingIntervalMS > 0 && this.pingMaxRetries > 0) {
      this.server.on("listening", () => this.autoTerminateUnresponsiveClients(this.pingIntervalMS, this.pingMaxRetries));
      this.server.on("close", () => clearInterval(this.pingInterval));
    }
  }
  listen(port, hostname, backlog, listeningListener) {
    this.server.listen(port, hostname, backlog, listeningListener);
    return this;
  }
  shutdown() {
    this.wss.close();
    this.server.close();
  }
  simulateLatency(milliseconds) {
    if (this._originalSend == null) {
      this._originalSend = WebSocketClient.prototype.raw;
    }
    const originalSend = this._originalSend;
    WebSocketClient.prototype.raw = milliseconds <= Number.EPSILON ? originalSend : function(...args) {
      let [buf, ...rest] = args;
      buf = Array.from(buf);
      setTimeout(() => originalSend.apply(this, [buf, ...rest]), milliseconds);
    };
  }
  autoTerminateUnresponsiveClients(pingInterval, pingMaxRetries) {
    this.pingInterval = setInterval(() => {
      this.wss.clients.forEach((client) => {
        if (client.pingCount >= pingMaxRetries) {
          debugConnection(`terminating unresponsive client`);
          return client.terminate();
        }
        client.pingCount++;
        client.ping(noop);
      });
    }, pingInterval);
  }
  async onConnection(rawClient, req) {
    rawClient.on("error", (err) => debugAndPrintError(err.message + "\n" + err.stack));
    rawClient.on("pong", heartbeat);
    const parsedURL = new URL(`ws://server/${req.url}`);
    const sessionId = parsedURL.searchParams.get("sessionId");
    const processAndRoomId = parsedURL.pathname.match(/\/[a-zA-Z0-9_\-]+\/([a-zA-Z0-9_\-]+)$/);
    const roomId = processAndRoomId && processAndRoomId[1];
    const room = matchMaker.getLocalRoomById(roomId);
    rawClient.pingCount = 0;
    const client = new WebSocketClient(sessionId, rawClient);
    try {
      if (!room || !room.hasReservedSeat(sessionId, parsedURL.searchParams.get("reconnectionToken"))) {
        throw new Error("seat reservation expired.");
      }
      await room._onJoin(client, {
        headers: req.headers,
        token: parsedURL.searchParams.get("_authToken") ?? getBearerToken(req.headers.authorization),
        ip: req.headers["x-real-ip"] ?? req.headers["x-forwarded-for"] ?? req.socket.remoteAddress
      });
    } catch (e) {
      debugAndPrintError(e);
      client.error(e.code, e.message, () => rawClient.close(Protocol.WS_CLOSE_WITH_ERROR));
    }
  }
};
export {
  WebSocketTransport
};