mw.py

"""
This patch is needed due to this BUG: https://code.djangoproject.com/ticket/33716
"""
from django.conf import settings
from django.core.handlers.asgi import ASGIRequest
from django.utils.deprecation import MiddlewareMixin
from django.utils.module_loading import import_string

#TODO on __init__
def is_next_middleware_async_capable(mw):
    path = f'{mw.__class__.__module__}.{mw.__class__.__name__}'
    next_index = settings.MIDDLEWARE.index(path) + 1
    mw_class = import_string(settings.MIDDLEWARE[next_index])
    return mw_class.async_capable


def call_mw(mw, request, _call_mw=MiddlewareMixin.__call__):
    if isinstance(request, ASGIRequest) and is_next_middleware_async_capable(mw):
        return mw.__acall__(request)
    return _call_mw(mw, request)


MiddlewareMixin.__call__ = call_mw