如何将Openpyxl生成的xlsx输出到浏览器？

I was using stackoverflow for a while now and it helped me very often. Now I have a problem I couldn't solve myself or through searching. I'm trying to output my excel file generated by openpyxl in browser as I was doing it with phpexcel. The method appears to be the same, but I only get broken file. My code looks like this:I was using stackoverflow for a while now and i