【Django】中间件实现钩子函数预处理和后处理，局部装饰视图函数

1. 在app文件夹里新建middleware.py
2. 继承MiddlewareMixin， 编写中间件类，重写process_request、process_response钩子函数

from django.http import HttpRequest, HttpResponse
from django.utils.decorators import decorator_from_middleware
from django.utils.deprecation import MiddlewareMixin

class MyMiddleware(MiddlewareMixin):
    def __init__(self, get_response=None):
        super().__init__(get_response)
    
    def process_request(self, request: HttpRequest) -> None:
        """视图函数前 钩子函数"""
        ...
        pass
    
    def process_response(self, request: HttpRequest, response: HttpResponse) -> HttpResponse:
        """视图函数后 钩子函数"""
        ...
        return response

# 中间件类包装成装饰器
my_middleware = decorator_from_middleware(MyMiddleware)

3. 使用@MyMiddleware装饰视图函数

如果要全局使用中间件

需要在settings⽂件中配置⾃定义中间件