antd-pro download function to achieve

Implementation of functions antd-pro, the front page can be written

<Button onClick={this.onDownLoadClick}> 下载</Button>

  onDownLoadClick = () => {
    const fileName = "下载文件.txt";
    const { dispatch } = this.props;
    dispatch({
      type: 'list/download',
      payload: {
        "id": 64,
      },
      callback: (response) => {
        console.log(response)
        // if (response.success) {
        const blob = new Blob([response]);
        const aLink = document.createElement('a');
        aLink.style.display = 'none';
        aLink.href = blob;
        aLink.download = fileName;
        document.body.appendChild(aLink);
        aLink.click();
        document.body.removeChild(aLink);
        // }
      }
    });
  }

But I downloaded the file content is not the content of the background needed,

I feel should be the back-end code
and later downloaded directly to the back office staff get a request to change the way,
the front end takes only

window.open('/url/download?id=1')

You can achieve download, to be honest did not know what the background