向服务器发出JSON POST请求，接收二进制响应（Excel文件），如何下载？

I'm trying to to make a POST call to server that sent JSON data to it. The server takes the JSON data, do some processing, then send back an Excel .xlsx as the response. I want the browser to open the "Save file as" dialog for the user to save. I have been looking for a clean solution to do this. But one possible solution in this question I'm trying to to make a POST call to server tha