HarmonyOS request downloadfile在一台模拟器设备上测试失败？

Question

request downloadfile一台模拟器设备上测试失败，换一台真机是好的。换另外一台开发机上的IDE及模拟器也是好的。报错信息如下：

SendRequest 148: failed, handle:0 error:3 desc:*.ISystemAbilityManager
[request_manager.cpp LoadServerSuccess 408] load download server success
[request_manager.cpp OnRemoteDied 347] RequestSaDeathRecipient on remote systemAbility died.

代码如下：

getNetPic(context: Context, url: string,fileName: string,
success: (filePath : string) => void) {
  hilog.error(0x0000, 'ch_test', 'context >>> ' + context.toString());
  let filesDir = context.filesDir;
  let temFileName = Date.now() + fileName
  let temFile = filesDir + '/' + temFileName
  hilog.error(0x0000, 'ch_test', 'temFile >>> ' + temFile);
  try {
    // 需要手动将 url 替换为真实服务器的 HTTP 协议地址
    request.downloadFile(context, {
      url: url,
      filePath: temFile
    }, (err: BusinessError, data: request.DownloadTask) => {
      if (err) {
        console.error(`Failed to request the download. Code: ${err.code}, message: ${err.message}`);
        return;
      }
      let downloadTask: request.DownloadTask = data;
      hilog.error(0x0000, 'ch_test', 'download complete >>> ' + downloadTask.toString());
      downloadTask.on('complete', () => {
        success(temFile)
      })
    });
  } catch (err) {
    console.error(`Failed to request the download. err: ${JSON.stringify(err)}`);
  }
}

看样子是downloadTask on complete没有监听到。

已参考API：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-request-V5\#requestdownloadfile9

Answer 1

如果downloadTask.on('complete'）没有监听到，麻烦确认下失败的模拟设备上是否打开了网络权限。

“requestPermissions”: [
{
  “name”: “ohos.permission.INTERNET”,
}
]

也可以使用downloadTask.on('fail')监听下载失败的错误码,方便查找原因。