Much better URL reversal in Django

context_processors.py

# encoding=utf-8

from django.core.urlresolvers import reverse


def burl_context(request):

    def burl(name, *args, **kwargs):
        external = kwargs.pop('_external')
        path = reverse(name, args=args, kwargs=kwargs)
        if external:
            protocol = 'https' if request.is_secure() else 'http'
            return '%s://%s%s' % (protocol, request.get_host(), path)
        return path

    return {
        'burl': burl,
    }

Of course you need Coffin (Jinja2).