Support Nginx X-HTTP-ACCEL header

[benoitbryon]

See http://wiki.nginx.org/X-accel and http://wiki.nginx.org/XSendfile

Here is a raw implementation, to give an idea...

def XAccelRedirectResponse(url, basename=None):
    """Return a HttpResponse with header for Nginx X-Accel-Redirect."""
    response = HttpResponse()
    basename = basename or url.split('/')[-1]
    response['X-Accel-Redirect'] = url
    response['Content-Type'] = ""
    response['Content-Disposition'] = 'attachment; filename=%s' % basename
    response['Expires'] = datetime.today() + timedelta(days=1)
    return response

The response class may support all headers supported by Nginx.

[benoitbryon]

Right now, I don't know what is the best way to configure DownloadView with Nginx X-Accel...

Inheritance and class methods (i.e. DownloadMixin.x_accel_response(...)) may not be the best choice, since it would mean that DownloadMixin has to support variations for many http servers (nginx, lighttpd, apache...).