def get_next(self, request):
        if 'next' in request.session: 
            next = request.session['next']
            del request.session['next']
        elif 'next' in request.GET:
            next = request.GET.get('next')
        elif 'next' in request.POST:
            next = request.POST.get('next')
        else:
            next = getattr(settings, 'LOGIN_REDIRECT_URL', '/')
        
        netloc = urlparse.urlparse(next)[1]
        
        if netloc and netloc != request.get_host():
            next = getattr(settings, 'LOGIN_REDIRECT_URL', '/')

        return next
Returns a url to redirect to after the login / signup.
dataset/ETHPy150Open flashingpumpkin/django-socialregistration/socialregistration/mixins.py/CommonMixin.get_next