session refer.py

refere.py

class MainsiteMiddleware(object):
    def process_request(self, request):
        from mainsite.urls import urlpatterns
        
        current_path = request.META.get('PATH_INFO', '')
        inside_mainsite = False
        
        # loop over all the page of mainsite
        for url in urlpatterns:
            # check to see if there is a url match
            if url.resolve(current_path[1:]) or url.resolve(current_path):
                inside_mainsite = True
                break
        
        # if they are not in mainsite -- ignore
        if not inside_mainsite:
            return
        
        # check to see if they have the referer set -- if not, set it
        if 'HTTP_REFERER' not in request.session:
            request.session['HTTP_REFERER'] = current_path
        
        return