partysocket/dist/ws.cjs.map

A better WebSocket that Just Works™

{"version":3,"file":"ws.cjs","names":[],"sources":["../src/ws.ts"],"sourcesContent":["// TODO: lose this eslint-disable\n\n/*!\n * Reconnecting WebSocket\n * by Pedro Ladaria <pedro.ladaria@gmail.com>\n * https://github.com/pladaria/reconnecting-websocket\n * License MIT\n */\n\nimport type { TypedEventTarget } from \"./type-helper\";\n\nif (!globalThis.EventTarget || !globalThis.Event) {\n  console.error(`\n  PartySocket requires a global 'EventTarget' class to be available!\n  You can polyfill this global by adding this to your code before any partysocket imports: \n  \n  \\`\\`\\`\n  import 'partysocket/event-target-polyfill';\n  \\`\\`\\`\n  Please file an issue at https://github.com/partykit/partykit if you're still having trouble.\n`);\n}\n\nexport class ErrorEvent extends Event {\n  public message: string;\n  public error: Error;\n  // oxlint-disable-next-line no-explicit-any\n  constructor(error: Error, target: any) {\n    super(\"error\", target);\n    this.message = error.message;\n    this.error = error;\n  }\n}\n\nexport class CloseEvent extends Event {\n  public code: number;\n  public reason: string;\n  public wasClean = true;\n  // oxlint-disable-next-line no-explicit-any\n  constructor(code = 1000, reason = \"\", target: any) {\n    super(\"close\", target);\n    this.code = code;\n    this.reason = reason;\n  }\n}\nexport interface WebSocketEventMap {\n  close: CloseEvent;\n  error: ErrorEvent;\n  message: MessageEvent;\n  open: Event;\n}\n\nconst Events = {\n  Event,\n  ErrorEvent,\n  CloseEvent\n};\n\nfunction assert(condition: unknown, msg?: string): asserts condition {\n  if (!condition) {\n    throw new Error(msg);\n  }\n}\n\nfunction cloneEventBrowser(e: Event) {\n  // oxlint-disable-next-line no-explicit-any\n  return new (e as any).constructor(e.type, e) as Event;\n}\n\nfunction cloneEventNode(e: Event) {\n  if (\"data\" in e) {\n    const evt = new MessageEvent(e.type, e);\n    return evt;\n  }\n\n  if (\"code\" in e || \"reason\" in e) {\n    const evt = new CloseEvent(\n      // @ts-expect-error we need to fix event/listener types\n      (e.code || 1999) as number,\n      // @ts-expect-error we need to fix event/listener types\n      (e.reason || \"unknown reason\") as string,\n      e\n    );\n    return evt;\n  }\n\n  if (\"error\" in e) {\n    const evt = new ErrorEvent(e.error as Error, e);\n    return evt;\n  }\n\n  const evt = new Event(e.type, e);\n  return evt;\n}\n\nconst isNode =\n  typeof process !== \"undefined\" &&\n  typeof process.versions?.node !== \"undefined\";\n\n// React Native has process and document polyfilled but not process.versions.node\n// It needs Node-style event cloning because browser-style cloning produces\n// events that fail instanceof Event checks in event-target-polyfill\n// See: https://github.com/cloudflare/partykit/issues/257\nconst isReactNative =\n  typeof navigator !== \"undefined\" && navigator.product === \"ReactNative\";\n\nconst cloneEvent = isNode || isReactNative ? cloneEventNode : cloneEventBrowser;\n\nexport type Options = {\n  // oxlint-disable-next-line no-explicit-any\n  WebSocket?: any;\n  maxReconnectionDelay?: number;\n  minReconnectionDelay?: number;\n  reconnectionDelayGrowFactor?: number;\n  minUptime?: number;\n  connectionTimeout?: number;\n  maxRetries?: number;\n  maxEnqueuedMessages?: number;\n  startClosed?: boolean;\n  debug?: boolean;\n  // oxlint-disable-next-line no-explicit-any\n  debugLogger?: (...args: any[]) => void;\n};\n\nconst DEFAULT = {\n  maxReconnectionDelay: 10000,\n  minReconnectionDelay: 1000 + Math.random() * 4000,\n  minUptime: 5000,\n  reconnectionDelayGrowFactor: 1.3,\n  connectionTimeout: 4000,\n  maxRetries: Number.POSITIVE_INFINITY,\n  maxEnqueuedMessages: Number.POSITIVE_INFINITY,\n  startClosed: false,\n  debug: false\n};\n\nlet didWarnAboutMissingWebSocket = false;\n\nexport type UrlProvider = string | (() => string) | (() => Promise<string>);\nexport type ProtocolsProvider =\n  | null\n  | string\n  | string[]\n  | (() => string | string[] | null)\n  | (() => Promise<string | string[] | null>);\n\nexport type Message = string | ArrayBuffer | Blob | ArrayBufferView;\n\nexport default class ReconnectingWebSocket extends (EventTarget as TypedEventTarget<WebSocketEventMap>) {\n  private _ws: WebSocket | undefined;\n  private _retryCount = -1;\n  private _uptimeTimeout: ReturnType<typeof setTimeout> | undefined;\n  private _connectTimeout: ReturnType<typeof setTimeout> | undefined;\n  private _shouldReconnect = true;\n  private _connectLock = false;\n  private _binaryType: BinaryType = \"blob\";\n  private _closeCalled = false;\n  private _messageQueue: Message[] = [];\n\n  private _debugLogger = console.log.bind(console);\n\n  protected _url: UrlProvider;\n  protected _protocols?: ProtocolsProvider;\n  protected _options: Options;\n\n  constructor(\n    url: UrlProvider,\n    protocols?: ProtocolsProvider,\n    options: Options = {}\n  ) {\n    super();\n    this._url = url;\n    this._protocols = protocols;\n    this._options = options;\n    if (this._options.startClosed) {\n      this._shouldReconnect = false;\n    }\n    if (this._options.debugLogger) {\n      this._debugLogger = this._options.debugLogger;\n    }\n    this._connect();\n  }\n\n  static get CONNECTING() {\n    return 0;\n  }\n  static get OPEN() {\n    return 1;\n  }\n  static get CLOSING() {\n    return 2;\n  }\n  static get CLOSED() {\n    return 3;\n  }\n\n  get CONNECTING() {\n    return ReconnectingWebSocket.CONNECTING;\n  }\n  get OPEN() {\n    return ReconnectingWebSocket.OPEN;\n  }\n  get CLOSING() {\n    return ReconnectingWebSocket.CLOSING;\n  }\n  get CLOSED() {\n    return ReconnectingWebSocket.CLOSED;\n  }\n\n  get binaryType() {\n    return this._ws ? this._ws.binaryType : this._binaryType;\n  }\n\n  set binaryType(value: BinaryType) {\n    this._binaryType = value;\n    if (this._ws) {\n      this._ws.binaryType = value;\n    }\n  }\n\n  /**\n   * Returns the number or connection retries\n   */\n  get retryCount(): number {\n    return Math.max(this._retryCount, 0);\n  }\n\n  /**\n   * The number of bytes of data that have been queued using calls to send() but not yet\n   * transmitted to the network. This value resets to zero once all queued data has been sent.\n   * This value does not reset to zero when the connection is closed; if you keep calling send(),\n   * this will continue to climb. Read only\n   */\n  get bufferedAmount(): number {\n    const bytes = this._messageQueue.reduce((acc, message) => {\n      if (typeof message === \"string\") {\n        acc += message.length; // not byte size\n      } else if (message instanceof Blob) {\n        acc += message.size;\n      } else {\n        acc += message.byteLength;\n      }\n      return acc;\n    }, 0);\n    return bytes + (this._ws ? this._ws.bufferedAmount : 0);\n  }\n\n  /**\n   * The extensions selected by the server. This is currently only the empty string or a list of\n   * extensions as negotiated by the connection\n   */\n  get extensions(): string {\n    return this._ws ? this._ws.extensions : \"\";\n  }\n\n  /**\n   * A string indicating the name of the sub-protocol the server selected;\n   * this will be one of the strings specified in the protocols parameter when creating the\n   * WebSocket object\n   */\n  get protocol(): string {\n    return this._ws ? this._ws.protocol : \"\";\n  }\n\n  /**\n   * The current state of the connection; this is one of the Ready state constants\n   */\n  get readyState(): number {\n    if (this._ws) {\n      return this._ws.readyState;\n    }\n    return this._options.startClosed\n      ? ReconnectingWebSocket.CLOSED\n      : ReconnectingWebSocket.CONNECTING;\n  }\n\n  /**\n   * The URL as resolved by the constructor\n   */\n  get url(): string {\n    return this._ws ? this._ws.url : \"\";\n  }\n\n  /**\n   * Whether the websocket object is now in reconnectable state\n   */\n  get shouldReconnect(): boolean {\n    return this._shouldReconnect;\n  }\n\n  /**\n   * An event listener to be called when the WebSocket connection's readyState changes to CLOSED\n   */\n  public onclose: ((event: CloseEvent) => void) | null = null;\n\n  /**\n   * An event listener to be called when an error occurs\n   */\n  public onerror: ((event: ErrorEvent) => void) | null = null;\n\n  /**\n   * An event listener to be called when a message is received from the server\n   */\n  public onmessage: ((event: MessageEvent) => void) | null = null;\n\n  /**\n   * An event listener to be called when the WebSocket connection's readyState changes to OPEN;\n   * this indicates that the connection is ready to send and receive data\n   */\n  public onopen: ((event: Event) => void) | null = null;\n\n  /**\n   * Closes the WebSocket connection or connection attempt, if any. If the connection is already\n   * CLOSED, this method does nothing\n   */\n  public close(code = 1000, reason?: string) {\n    this._closeCalled = true;\n    this._shouldReconnect = false;\n    this._clearTimeouts();\n    if (!this._ws) {\n      this._debug(\"close enqueued: no ws instance\");\n      return;\n    }\n    if (this._ws.readyState === this.CLOSED) {\n      this._debug(\"close: already closed\");\n      return;\n    }\n    this._ws.close(code, reason);\n  }\n\n  /**\n   * Closes the WebSocket connection or connection attempt and connects again.\n   * Resets retry counter;\n   */\n  public reconnect(code?: number, reason?: string) {\n    this._shouldReconnect = true;\n    this._closeCalled = false;\n    this._retryCount = -1;\n    if (!this._ws || this._ws.readyState === this.CLOSED) {\n      this._connect();\n    } else {\n      this._disconnect(code, reason);\n      this._connect();\n    }\n  }\n\n  /**\n   * Enqueue specified data to be transmitted to the server over the WebSocket connection\n   */\n  public send(data: Message) {\n    if (this._ws && this._ws.readyState === this.OPEN) {\n      this._debug(\"send\", data);\n      this._ws.send(data);\n    } else {\n      const { maxEnqueuedMessages = DEFAULT.maxEnqueuedMessages } =\n        this._options;\n      if (this._messageQueue.length < maxEnqueuedMessages) {\n        this._debug(\"enqueue\", data);\n        this._messageQueue.push(data);\n      }\n    }\n  }\n\n  private _debug(...args: unknown[]) {\n    if (this._options.debug) {\n      this._debugLogger(\"RWS>\", ...args);\n    }\n  }\n\n  private _getNextDelay() {\n    const {\n      reconnectionDelayGrowFactor = DEFAULT.reconnectionDelayGrowFactor,\n      minReconnectionDelay = DEFAULT.minReconnectionDelay,\n      maxReconnectionDelay = DEFAULT.maxReconnectionDelay\n    } = this._options;\n    let delay = 0;\n    if (this._retryCount > 0) {\n      delay =\n        minReconnectionDelay *\n        reconnectionDelayGrowFactor ** (this._retryCount - 1);\n      if (delay > maxReconnectionDelay) {\n        delay = maxReconnectionDelay;\n      }\n    }\n    this._debug(\"next delay\", delay);\n    return delay;\n  }\n\n  private _wait(): Promise<void> {\n    return new Promise((resolve) => {\n      setTimeout(resolve, this._getNextDelay());\n    });\n  }\n\n  private _getNextProtocols(\n    protocolsProvider: ProtocolsProvider | null\n  ): Promise<string | string[] | null> {\n    if (!protocolsProvider) return Promise.resolve(null);\n\n    if (\n      typeof protocolsProvider === \"string\" ||\n      Array.isArray(protocolsProvider)\n    ) {\n      return Promise.resolve(protocolsProvider);\n    }\n\n    if (typeof protocolsProvider === \"function\") {\n      const protocols = protocolsProvider();\n      if (!protocols) return Promise.resolve(null);\n\n      if (typeof protocols === \"string\" || Array.isArray(protocols)) {\n        return Promise.resolve(protocols);\n      }\n\n      // @ts-expect-error redundant check\n      if (protocols.then) {\n        return protocols;\n      }\n    }\n\n    throw Error(\"Invalid protocols\");\n  }\n\n  private _getNextUrl(urlProvider: UrlProvider): Promise<string> {\n    if (typeof urlProvider === \"string\") {\n      return Promise.resolve(urlProvider);\n    }\n    if (typeof urlProvider === \"function\") {\n      const url = urlProvider();\n      if (typeof url === \"string\") {\n        return Promise.resolve(url);\n      }\n      // eslint-disable-next-line @typescript-eslint/ban-ts-comment\n      // @ts-expect-error\n      if (url.then) {\n        return url;\n      }\n\n      // return url;\n    }\n    throw Error(\"Invalid URL\");\n  }\n\n  private _connect() {\n    if (this._connectLock || !this._shouldReconnect) {\n      return;\n    }\n    this._connectLock = true;\n\n    const {\n      maxRetries = DEFAULT.maxRetries,\n      connectionTimeout = DEFAULT.connectionTimeout\n    } = this._options;\n\n    if (this._retryCount >= maxRetries) {\n      this._debug(\"max retries reached\", this._retryCount, \">=\", maxRetries);\n      this._connectLock = false;\n      return;\n    }\n\n    this._retryCount++;\n\n    this._debug(\"connect\", this._retryCount);\n    this._removeListeners();\n\n    this._wait()\n      .then(() =>\n        Promise.all([\n          this._getNextUrl(this._url),\n          this._getNextProtocols(this._protocols || null)\n        ])\n      )\n      .then(([url, protocols]) => {\n        // close could be called before creating the ws\n        if (this._closeCalled) {\n          this._connectLock = false;\n          return;\n        }\n        if (\n          !this._options.WebSocket &&\n          typeof WebSocket === \"undefined\" &&\n          !didWarnAboutMissingWebSocket\n        ) {\n          console.error(`‼️ No WebSocket implementation available. You should define options.WebSocket. \n\nFor example, if you're using node.js, run \\`npm install ws\\`, and then in your code:\n\nimport PartySocket from 'partysocket';\nimport WS from 'ws';\n\nconst partysocket = new PartySocket({\n  host: \"127.0.0.1:1999\",\n  room: \"test-room\",\n  WebSocket: WS\n});\n\n`);\n          didWarnAboutMissingWebSocket = true;\n        }\n        const WS: typeof WebSocket = this._options.WebSocket || WebSocket;\n        this._debug(\"connect\", { url, protocols });\n        this._ws = protocols ? new WS(url, protocols) : new WS(url);\n\n        this._ws.binaryType = this._binaryType;\n        this._connectLock = false;\n        this._addListeners();\n\n        this._connectTimeout = setTimeout(\n          () => this._handleTimeout(),\n          connectionTimeout\n        );\n      })\n      // via https://github.com/pladaria/reconnecting-websocket/pull/166\n      .catch((err) => {\n        this._connectLock = false;\n        this._handleError(new Events.ErrorEvent(Error(err.message), this));\n      });\n  }\n\n  private _handleTimeout() {\n    this._debug(\"timeout event\");\n    this._handleError(new Events.ErrorEvent(Error(\"TIMEOUT\"), this));\n  }\n\n  private _disconnect(code = 1000, reason?: string) {\n    this._clearTimeouts();\n    if (!this._ws) {\n      return;\n    }\n    this._removeListeners();\n    try {\n      if (\n        this._ws.readyState === this.OPEN ||\n        this._ws.readyState === this.CONNECTING\n      ) {\n        this._ws.close(code, reason);\n      }\n      this._handleClose(new Events.CloseEvent(code, reason, this));\n    } catch (_error) {\n      // ignore\n    }\n  }\n\n  private _acceptOpen() {\n    this._debug(\"accept open\");\n    this._retryCount = 0;\n  }\n\n  private _handleOpen = (event: Event) => {\n    this._debug(\"open event\");\n    const { minUptime = DEFAULT.minUptime } = this._options;\n\n    clearTimeout(this._connectTimeout);\n    this._uptimeTimeout = setTimeout(() => this._acceptOpen(), minUptime);\n\n    assert(this._ws, \"WebSocket is not defined\");\n\n    this._ws.binaryType = this._binaryType;\n\n    // send enqueued messages (messages sent before websocket open event)\n    this._messageQueue.forEach((message) => {\n      this._ws?.send(message);\n    });\n    this._messageQueue = [];\n\n    if (this.onopen) {\n      this.onopen(event);\n    }\n    this.dispatchEvent(cloneEvent(event));\n  };\n\n  private _handleMessage = (event: MessageEvent) => {\n    this._debug(\"message event\");\n\n    if (this.onmessage) {\n      this.onmessage(event);\n    }\n    this.dispatchEvent(cloneEvent(event));\n  };\n\n  private _handleError = (event: ErrorEvent) => {\n    this._debug(\"error event\", event.message);\n    this._disconnect(\n      undefined,\n      event.message === \"TIMEOUT\" ? \"timeout\" : undefined\n    );\n\n    if (this.onerror) {\n      this.onerror(event);\n    }\n    this._debug(\"exec error listeners\");\n    this.dispatchEvent(cloneEvent(event));\n\n    this._connect();\n  };\n\n  private _handleClose = (event: CloseEvent) => {\n    this._debug(\"close event\");\n    this._clearTimeouts();\n\n    if (this._shouldReconnect) {\n      this._connect();\n    }\n\n    if (this.onclose) {\n      this.onclose(event);\n    }\n    this.dispatchEvent(cloneEvent(event));\n  };\n\n  private _removeListeners() {\n    if (!this._ws) {\n      return;\n    }\n    this._debug(\"removeListeners\");\n    this._ws.removeEventListener(\"open\", this._handleOpen);\n    this._ws.removeEventListener(\"close\", this._handleClose);\n    this._ws.removeEventListener(\"message\", this._handleMessage);\n    // @ts-expect-error we need to fix event/listerner types\n    this._ws.removeEventListener(\"error\", this._handleError);\n  }\n\n  private _addListeners() {\n    if (!this._ws) {\n      return;\n    }\n    this._debug(\"addListeners\");\n    this._ws.addEventListener(\"open\", this._handleOpen);\n    this._ws.addEventListener(\"close\", this._handleClose);\n    this._ws.addEventListener(\"message\", this._handleMessage);\n    // @ts-expect-error we need to fix event/listener types\n    this._ws.addEventListener(\"error\", this._handleError);\n  }\n\n  private _clearTimeouts() {\n    clearTimeout(this._connectTimeout);\n    clearTimeout(this._uptimeTimeout);\n  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