python-3.x - 如何在fastapi中从内存中返回xlsx文件？

Question

我想应要求提供 xlsx。随着使用 BytesIO和 xlsxwriter我创建一个文件。
使用下面的代码，我可以下载一个空的(!).txt文件:

@router.get("/payments/xlsx", response_description='xlsx')
async def payments():
    """sss"""
    output = BytesIO()
    workbook = xlsxwriter.Workbook(output)
    worksheet = workbook.add_worksheet()
    worksheet.write(0, 0, 'ISBN')
    worksheet.write(0, 1, 'Name')
    worksheet.write(0, 2, 'Takedown date')
    worksheet.write(0, 3, 'Last updated')
    workbook.close()
    output.seek(0)
    return StreamingResponse(output)

如果我添加 headers={'Content-Type': 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'}我在浏览器中收到此错误:

Unable to open file
You may be having a problem connecting with the server, or the file that you wanted to open was corrupted.

我该如何解决这个问题？

Answer 1

您必须设置 Content-Disposition 响应中的 header

@router.get("/payments/xlsx", response_description='xlsx')
async def payments():
    output = BytesIO()
    workbook = xlsxwriter.Workbook(output)
    worksheet = workbook.add_worksheet()
    worksheet.write(0, 0, 'ISBN')
    worksheet.write(0, 1, 'Name')
    worksheet.write(0, 2, 'Takedown date')
    worksheet.write(0, 3, 'Last updated')
    workbook.close()
    output.seek(0)

    headers = {
 'Content-Disposition': 'attachment; filename="filename.xlsx"'
 }
    return StreamingResponse(output, headers=headers)