HarmonyOS 如何实现localResource://+图片名称方式访问沙箱图片

参考示例：

.onInterceptRequest((event) => {
  let response: WebResourceResponse = new WebResourceResponse();
  let url = event?.request.getRequestUrl()
  if (url?.toLowerCase().startsWith('localresource://')) {
    let localId = url.substring(url.lastIndexOf("/") + 1);
    let localImage = `${SYSTEM_DIRECTORY_JSBRIDGETMP}${localId}`;
    response.setResponseCode(200);
    response.setResponseMimeType("image/png");
    response.setResponseData(readFile(localImage));
    return response;
  }
  return null;
})
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