async post()

in glean/src/platform/browser/sendbeacon_fallback_uploader.ts [22:46]

• 16 lines of code
• 6 McCabe index (conditional complexity)

  async post(
    url: string,
    pingRequest: PingRequest<string | Uint8Array>
  ): Promise<UploadResult> {

    // Some options require us to submit custom headers. Unfortunately not all the
    // uploaders support them (e.g. `sendBeacon`). In case headers are required, switch
    // back to the `fetch` uploader that supports headers.
    // Then try `sendBeacon` first,
    // fall back to `fetch` if `sendBeacon` reports an error or `sendBeacon` is
    // not defined.
    const hasNoCustomHeaders = !Context.config?.sourceTags && !Context.config?.debugViewTag;

    if (hasNoCustomHeaders && !!navigator && !!navigator.sendBeacon) {
      const beaconStatus = await this.sendBeaconUploader.post(url, pingRequest, false);
      if (beaconStatus.result == UploadResultStatus.Success) {
        return beaconStatus;
      }
      log(LOG_TAG, "The `sendBeacon` call was not serviced by the browser. Falling back to the `fetch` uploader.", LoggingLevel.Warn);
    } else {
      log(LOG_TAG, "`sendBeacon` is not available. Falling back to the `fetch` uploader.", LoggingLevel.Warn);
    }

    return this.fetchUploader.post(url, pingRequest);
  }