python - Django 'TestMiddleware' 对象没有属性 'get_response'

Question

我的 django TestMiddleware 代码有问题
我的 djando 版本
Django 3.0.6

我的代码
中间件.py

from django.utils.deprecation import MiddlewareMixin
class TestMiddleware(MiddlewareMixin):
    '''中间键类'''

    def __init__(self, request):
        '''服务器重启之后，接受第一个请求时调用'''
        print('--init--')

    def process_request(self, request):
        '''产生request对象后，url匹配之前调用'''
        print('--process_request--')

    def process_view(self, request, view_func, *view_args, **view_kwargs):
        '''url匹配之后，视图函数调用之前'''
        print('--process_view--')

    def process_response(self, request, response):
        '''视图函数调用之后，内容返回浏览器之前'''
        print('--process_response')
        return response

设置.py

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    # 'booktest.middleware.BlockedIPSMiddleWare',
    'booktest.middleware.TestMiddleware',
]

错误

System check identified no issues (0 silenced).
June 03, 2020 - 13:38:28
Django version 3.0.6, using settings 'test5.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CONTROL-C.
--init--
--process_request--
Session data corrupted
Internal Server Error: /index
Traceback (most recent call last):
  File "/home/coco/.virtualenvs/bj19_py3/lib/python3.6/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/home/coco/.virtualenvs/bj19_py3/lib/python3.6/site-packages/django/utils/deprecation.py", line 94, in __call__
    response = response or self.get_response(request)
AttributeError: 'TestMiddleware' object has no attribute 'get_response'

我是 python 新手，请问我需要一些帮助

Answer 1

看来您正试图通过使用 django.utils.deprecation.MiddlewareMixin 来实现旧式的中间件。混音。

较新版本的中间件需要不同的方法。
请引用官方文档https://docs.djangoproject.com/en/3.0/topics/http/middleware/

它现在看起来像:

class SimpleMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response
        # One-time configuration and initialization.

    def __call__(self, request):
        # Code to be executed for each request before
        # the view (and later middleware) are called.
        print('--process_request--')

        response = self.get_response(request)

        # Code to be executed for each request/response after
        # the view is called.
        print('--process_response')

        return response

    def process_view(request, view_func, view_args, view_kwargs):
        print('--process_view')

您可以添加其他方法，例如 process_exception() process_template_response()
如果您真的坚持使用弃用中间件 mixin(我绝对不会对任何新代码这样做)

然后你可以尝试:

from django.utils.deprecation import MiddlewareMixin
class TestMiddleware(MiddlewareMixin):
    '''中间键类'''

    def __init__(self, *args, **kwargs):
        '''服务器重启之后，接受第一个请求时调用'''
        super().__init__(*args, **kwargs)
        print('--init--')

    def process_request(self, request):
        '''产生request对象后，url匹配之前调用'''
        print('--process_request--')

    def process_view(self, request, view_func, *view_args, **view_kwargs):
        '''url匹配之后，视图函数调用之前'''
        print('--process_view--')

    def process_response(self, request, response):
        '''视图函数调用之后，内容返回浏览器之前'''
        print('--process_response')
        return response