Issue with file sometimes unable to be opened by Numbers

Hi,

I am using XlsxWriter to do export from Django through an HttpResponse and sometimes the file can’t be opened by Numbers, but can always be opened by LibreOffice.

I am using Python version 2.7.12 and XlsxWriter 1.0.2 and Numbers version 4.3.1 5249 and LibreOffice version 5.3.4.2.

Here is basically how the response is coded, mashed into one script obviously:

from django.http import HttpResponse
from django.views.generic.base import TemplateView
import xlsxwriter

class XlsxResponse(HttpResponse):
    def __init__(self, writer_klass, *args, **kwargs):
        kwargs["content_type"] = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
        super(XlsxResponse, self).__init__(*args, **kwargs)
        self._writer_klass = writer_klass
        self["Content-Disposition"] = "attachment; filename=\"export.xlsx\""

    def process(self, content):
        self._writer_klass(self).handle(content)


class XlsxWriter(object):
    def __init__(self, response):
        self._response = response
        self.wb = xlsxwriter.Workbook(response, {"in_memory": True})

    # This is implemented by the sub-classes, which handle worksheets
    # and formats and stuff.
    def _handle(self, content):
        raise NotImplementedError

    def handle(self, content):
        try:
            self._handle(content)
        finally:
            self.wb.close()


class CalendarExportView(TemplateView):
    def render_to_response(self, context, **response_kwargs):
        response = nexus_http.XlsxResponse(writer_klass=CalendarWriter)
        response.process(context)
        return response

[jmcnamara]

Closing.

[jmcnamara]

Thanks for the update. Hopefully it will help someone else.