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

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

{
  "version": 3,
  "sources": ["../src/WebSocketTransport.ts"],
  "sourcesContent": ["import http from 'http';\nimport { URL } from 'url';\nimport WebSocket, { type ServerOptions, WebSocketServer } from 'ws';\n\nimport { matchMaker, Protocol, Transport, debugAndPrintError, debugConnection, getBearerToken } from '@colyseus/core';\nimport { WebSocketClient } from './WebSocketClient.js';\n\nfunction noop() {/* tslint:disable:no-empty */ }\nfunction heartbeat() { this.pingCount = 0; }\n\ntype RawWebSocketClient = WebSocket & { pingCount: number };\n\nexport interface TransportOptions extends ServerOptions {\n  pingInterval?: number;\n  pingMaxRetries?: number;\n}\n\nexport class WebSocketTransport extends Transport {\n  protected wss: WebSocketServer;\n\n  protected pingInterval: NodeJS.Timeout;\n  protected pingIntervalMS: number;\n  protected pingMaxRetries: number;\n\n  private _originalSend: typeof WebSocketClient.prototype.raw | null = null;\n\n  constructor(options: TransportOptions = {}) {\n    super();\n\n    if (options.maxPayload === undefined) {\n      options.maxPayload = 4 * 1024; // 4Kb\n    }\n\n    // disable per-message deflate by default\n    if (options.perMessageDeflate === undefined) {\n      options.perMessageDeflate = false;\n    }\n\n    this.pingIntervalMS = (options.pingInterval !== undefined)\n      ? options.pingInterval\n      : 3000;\n\n    this.pingMaxRetries = (options.pingMaxRetries !== undefined)\n      ? options.pingMaxRetries\n      : 2;\n\n    // create server by default\n    if (!options.server && !options.noServer) {\n      options.server = http.createServer();\n    }\n\n    this.wss = new WebSocketServer(options);\n    this.wss.on('connection', this.onConnection);\n\n    // this is required to allow the ECONNRESET error to trigger on the `server` instance.\n    this.wss.on('error', (err) => debugAndPrintError(err));\n\n    this.server = options.server;\n\n    if (this.pingIntervalMS > 0 && this.pingMaxRetries > 0) {\n      this.server.on('listening', () =>\n        this.autoTerminateUnresponsiveClients(this.pingIntervalMS, this.pingMaxRetries));\n\n      this.server.on('close', () =>\n        clearInterval(this.pingInterval));\n    }\n  }\n\n  public listen(port: number, hostname?: string, backlog?: number, listeningListener?: () => void) {\n    this.server.listen(port, hostname, backlog, listeningListener);\n    return this;\n  }\n\n  public shutdown() {\n    this.wss.close();\n    this.server.close();\n  }\n\n  public simulateLatency(milliseconds: number) {\n    if (this._originalSend == null) {\n      this._originalSend = WebSocketClient.prototype.raw;\n    }\n\n    const originalSend = this._originalSend;\n\n    WebSocketClient.prototype.raw = milliseconds <= Number.EPSILON ? originalSend : function (...args: any[]) {\n      // copy buffer\n      let [buf, ...rest] = args;\n      buf = Array.from(buf);\n      setTimeout(() => originalSend.apply(this, [buf, ...rest]), milliseconds);\n    };\n  }\n\n  protected autoTerminateUnresponsiveClients(pingInterval: number, pingMaxRetries: number) {\n    // interval to detect broken connections\n    this.pingInterval = setInterval(() => {\n      this.wss.clients.forEach((client: WebSocket) => {\n        //\n        // if client hasn't responded after the interval, terminate its connection.\n        //\n        if ((client as RawWebSocketClient).pingCount >= pingMaxRetries) {\n          // debugConnection(`terminating unresponsive client ${client.sessionId}`);\n          debugConnection(`terminating unresponsive client`);\n          return client.terminate();\n        }\n\n        (client as RawWebSocketClient).pingCount++;\n        client.ping(noop);\n      });\n    }, pingInterval);\n  }\n\n  protected async onConnection(rawClient: RawWebSocketClient, req: http.IncomingMessage) {\n    // prevent server crashes if a single client had unexpected error\n    rawClient.on('error', (err) => debugAndPrintError(err.message + '\\n' + err.stack));\n    rawClient.on('pong', heartbeat);\n\n    // compatibility with ws / uws\n    const parsedURL = new URL(`ws://server/${req.url}`);\n\n    const sessionId = parsedURL.searchParams.get(\"sessionId\");\n    const processAndRoomId = parsedURL.pathname.match(/\\/[a-zA-Z0-9_\\-]+\\/([a-zA-Z0-9_\\-]+)$/);\n    const roomId = processAndRoomId && processAndRoomId[1];\n\n    const room = matchMaker.getLocalRoomById(roomId);\n\n    // set client id\n    rawClient.pingCount = 0;\n\n    const client = new WebSocketClient(sessionId, rawClient);\n\n    //\n    // TODO: DRY code below with all transports\n    //\n\n    try {\n      if (!room || !room.hasReservedSeat(sessionId, parsedURL.searchParams.get(\"reconnectionToken\"))) {\n        throw new Error('seat reservation expired.');\n      }\n\n      await room._onJoin(client, {\n        headers: req.headers,\n        token: parsedURL.searchParams.get(\"_authToken\") ?? getBearerToken(req.headers.authorization),\n        ip: req.headers['x-real-ip'] ?? req.headers['x-forwarded-for'] ?? req.socket.remoteAddress,\n      });\n\n    } catch (e) {\n      debugAndPrintError(e);\n\n      // send error code to client then terminate\n      client.error(e.code, e.message, () =>\n        rawClient.close(Protocol.WS_CLOSE_WITH_ERROR));\n    }\n  }\n\n}\n"],
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