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我正在使用 axios 下载图像并将它们保存在本地。我从https://stackoverflow.com/a/61269447/7468791获取了以下答案,该答案适用于较大的图像,以确保它们在写入之前已完全下载。

但是,某些图像 url 返回 403 错误。我仍然得到为这些创建的图像文件,尽管是一个空文件。我如何调整代码,以便如果 get 请求收到 403 错误,它不会尝试编写任何内容?

export async function downloadFile(fileUrl: string, outputLocationPath: string) {
const writer = createWriteStream(outputLocationPath);

return Axios({
  method: 'get',
  url: fileUrl,
  responseType: 'stream',
}).then(response => {

  //ensure that the user can call `then()` only when the file has
  //been downloaded entirely.

  return new Promise((resolve, reject) => {
    response.data.pipe(writer);
    let error = null;
    writer.on('error', err => {
      error = err;
      writer.close();
      reject(err);
    });
    writer.on('close', () => {
      if (!error) {
        resolve(true);
      }
      //no need to call the reject here, as it will have been called in the
      //'error' stream;
    });
  });
});

}

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1 回答 1

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响应代码应该在 response.status 中可用,然后您可以检查并有条件地拒绝该承诺。

于 2020-10-02T15:17:45.007 回答