How to encode UTF8 filename for HTTP headers? (Python, Django)

Question

I have problem with HTTP headers, they\'re encoded in ASCII and I want to provided a view for downloading files that names can be non ASCII.

response[\'Cont         


        

Answer 1

Starting with Django 2.1 (see issue #16470), you can use FileResponse, which will correctly set the Content-Disposition header for attachments. Starting with Django 3.0 (issue #30196) it will also set it correctly for inline files.

For example, to return a file named my_img.jpg with MIME type image/jpeg as an HTTP response:

response = FileResponse(open("my_img.jpg", 'rb'), as_attachment=True, content_type="image/jpeg")
return response

Or, if you can't use FileResponse, you can use the relevant part from FileResponse's source to set the Content-Disposition header yourself. Here's what that source currently looks like:

from urllib.parse import quote

disposition = 'attachment' if as_attachment else 'inline'
try:
    filename.encode('ascii')
    file_expr = 'filename="{}"'.format(filename)
except UnicodeEncodeError:
    file_expr = "filename*=utf-8''{}".format(quote(filename))
response.headers['Content-Disposition'] = '{}; {}'.format(disposition, file_expr)