如何将文件对象从Flask API发送到Angular前端而不将其存储在文件系统上

from flask import send_file

@app.route('/download', methods=['GET'])
def download_file():
    # 处理文件对象的逻辑，例如从数据库或其他地方获取文件对象
    file_obj = get_file_object()

    # 使用send_file函数将文件对象发送给前端
    return send_file(file_obj, as_attachment=True, attachment_filename='filename.ext')

import { HttpClient } from '@angular/common/http';

constructor(private http: HttpClient) {}

downloadFile() {
  this.http.get('http://your-api-url/download', { responseType: 'blob' })
    .subscribe((data: Blob) => {
      const downloadUrl = window.URL.createObjectURL(data);
      const link = document.createElement('a');
      link.href = downloadUrl;
      link.download = 'filename.ext';
      link.click();
    });
}