Django middleware to capture X-Forwarded-Host and X-Forwarded-Port headers

xforwarded.py

class XForwarded(object):
    def process_request(self, request):
        try:
            request.META['HTTP_HOST'] = request.META['HTTP_X_FORWARDED_HOST']) + ":" + str(request.META['HTTP_X_FORWARDED_PORT'])
        except KeyError:
            pass
        return None