@bitrix24/b24jssdk/dist/esm/pullClient/long-polling-connector.mjs.map

Bitrix24 REST API JavaScript SDK

{"version":3,"file":"long-polling-connector.mjs","sources":["../../../src/pullClient/long-polling-connector.ts"],"sourcesContent":["import type { ConnectorConfig } from '../types/pull'\nimport { Type } from '../tools/type'\nimport { Text } from '../tools/text'\nimport { AbstractConnector } from './abstract-connector'\nimport { ConnectionType } from '../types/pull'\n\nconst LONG_POLLING_TIMEOUT = 60\n\nexport class LongPollingConnector extends AbstractConnector {\n  private _active: boolean\n\n  private _requestTimeout: ReturnType<typeof setTimeout> | null\n  private _failureTimeout: ReturnType<typeof setTimeout> | null\n  // Created lazily on the first connect() rather than in the constructor: the\n  // connector is built eagerly by PullClient.init() (which runs inside start())\n  // regardless of the chosen transport, and `new XMLHttpRequest()` throws a\n  // ReferenceError under SSR/Node where the global is absent. Deferring it keeps\n  // construct + init + start SSR-safe; connect() degrades gracefully instead. (#222)\n  private _xhr: XMLHttpRequest | null\n  private _requestAborted: boolean\n\n  constructor(config: ConnectorConfig) {\n    super(config)\n\n    this._active = false\n    this._connectionType = ConnectionType.LongPolling\n\n    this._requestTimeout = null\n    this._failureTimeout = null\n    this._xhr = null\n    this._requestAborted = false\n  }\n\n  /**\n   * @inheritDoc\n   */\n  override connect(): void {\n    if (!this._xhr) {\n      // No XMLHttpRequest under SSR/Node: a long-polling connection needs a\n      // browser. Surface a clean error instead of a raw ReferenceError. (#222)\n      if (typeof XMLHttpRequest === 'undefined') {\n        this._callbacks.onError(\n          new Error(\n            'LongPollingConnector: XMLHttpRequest is not available in this'\n            + ' environment (SSR/Node); a long-polling connection requires a browser'\n          )\n        )\n        return\n      }\n      this._xhr = this.createXhr()\n    }\n\n    this._active = true\n    this.performRequest()\n  }\n\n  /**\n   * @inheritDoc\n   * @param code\n   * @param reason\n   */\n  override disconnect(code: number, reason: string): void {\n    this._active = false\n\n    this.clearTimeOut()\n\n    if (this._xhr) {\n      this._requestAborted = true\n      this._xhr.abort()\n    }\n\n    this._disconnectCode = code\n    this._disconnectReason = reason\n    this.connected = false\n  }\n\n  private performRequest(): void {\n    if (!this._active) {\n      return\n    }\n\n    if (!this.connectionPath) {\n      throw new Error('Long polling connection path is not defined')\n    }\n\n    const xhr = this._xhr\n    if (!xhr) {\n      return\n    }\n\n    if (xhr.readyState !== 0 && xhr.readyState !== 4) {\n      return\n    }\n\n    this.clearTimeOut()\n\n    this._failureTimeout = setTimeout(() => {\n      this.connected = true\n    }, 5_000)\n\n    this._requestTimeout = setTimeout(\n      this.onRequestTimeout.bind(this),\n      LONG_POLLING_TIMEOUT * 1_000\n    )\n\n    xhr.open('GET', this.connectionPath)\n    xhr.send()\n  }\n\n  private onRequestTimeout() {\n    this._requestAborted = true\n    this._xhr?.abort()\n    this.performRequest()\n  }\n\n  private onXhrReadyStateChange(): void {\n    const xhr = this._xhr\n    if (!xhr) {\n      return\n    }\n\n    if (xhr.readyState === 4) {\n      if (!this._requestAborted || xhr.status == 200) {\n        this.onResponse(xhr.response)\n      }\n\n      this._requestAborted = false\n    }\n  }\n\n  /**\n   * Via http request\n   * @inheritDoc\n   */\n  override send(buffer: ArrayBuffer | string): boolean {\n    const path = this._parent.getPublicationPath()\n    if (!path) {\n      this.getLogger().error(`${Text.getDateForLog()}: Pull: publication path is empty`).catch(() => {})\n      return false\n    }\n\n    if (typeof XMLHttpRequest === 'undefined') {\n      this.getLogger().error(\n        `${Text.getDateForLog()}: Pull: XMLHttpRequest is not available; cannot publish`\n      ).catch(() => {})\n      return false\n    }\n\n    const xhr = new XMLHttpRequest()\n    xhr.open('POST', path)\n    xhr.send(buffer)\n\n    return true\n  }\n\n  private onResponse(response: any): void {\n    this.clearTimeOut()\n\n    const xhr = this._xhr\n    if (!xhr) {\n      return\n    }\n\n    if (xhr.status === 200) {\n      this.connected = true\n      if (Type.isStringFilled(response) || response instanceof ArrayBuffer) {\n        this._callbacks.onMessage(response)\n      } else {\n        this._parent.session.mid = null\n      }\n      this.performRequest()\n    } else if (xhr.status === 304) {\n      this.connected = true\n      if (\n        xhr.getResponseHeader('Expires')\n        === 'Thu, 01 Jan 1973 11:11:01 GMT'\n      ) {\n        const lastMessageId = xhr.getResponseHeader('Last-Message-Id')\n        if (Type.isStringFilled(lastMessageId)) {\n          this._parent.setLastMessageId(lastMessageId || '')\n        }\n      }\n      this.performRequest()\n    } else {\n      this._callbacks.onError(new Error('Could not connect to the server'))\n\n      this.connected = false\n    }\n  }\n\n  // region Tools ////\n  private clearTimeOut(): void {\n    if (this._failureTimeout) {\n      clearTimeout(this._failureTimeout)\n      this._failureTimeout = null\n    }\n\n    if (this._requestTimeout) {\n      clearTimeout(this._requestTimeout)\n      this._requestTimeout = null\n    }\n  }\n\n  private createXhr(): XMLHttpRequest {\n    const result = new XMLHttpRequest()\n\n    if (this._parent.isProtobufSupported() && !this._parent.isJsonRpc()) {\n      result.responseType = 'arraybuffer'\n    }\n\n    result.addEventListener(\n      'readystatechange',\n      this.onXhrReadyStateChange.bind(this)\n    )\n\n    return result\n  }\n  // endregion 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