Python Klein - How to return Excel file as attachment?

Question

i'm use Python Klein for my small API. Can return csv as response, but is this possible to return Excel file? Flask has this functional but what about Klein?

Task:

Have Excel file on hard drive and want return it to as attachment, so user can download it via API call.

Example: With csv file all is working good like

   @app.route('/download/',  branch=True, methods=['GET'])
   def download(request):
       request.setHeader("Access-Control-Allow-Origin", "*")
       request.setHeader('Content-Type', 'text/csv')
       request.setHeader('Content-Disposition', 'attachment; filename=test.csv')
       file = open('test.csv', "r")
       csv_data = file.read() 
       return csv_data

But how to be with an Excel file?

Answer 1

Found solution:

from twisted.web.static import File
from klein import Klein
app = Klein()
@app.route('/', branch=True)
def pg_index(request):
    request.setHeader("Access-Control-Allow-Origin", "*")
    request.setHeader('Content-Type', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet')
    request.setHeader('Content-Disposition', 'attachment; filename=test.xlsx'.format(list_id))
    return File('./test.xlsx')