如何在 Django 中使用 process_view() 创建基于函数的中间件？

Question

我正在使用标准实现来实现新的中间件：def my_middleware(get_response):    def middleware(request):        return get_response(request)    return middleware我想得到view_args. 我可以改为基于类的中间件并实现该方法process_view(request, view_func, view_args, view_kwargs)有没有其他方法可以在我的中间件中获取这些 view_args、view_kwargs 而无需更改为基于类的中间件？

Answer 1

设置为函数process_view(...)的属性 为middleware(...)

def process_view(request, view_func, view_args, view_kwargs):

    """

    do something

    """

def simple_middleware(get_response):

    # One-time configuration and initialization.

    def middleware(request):

        # Code to be executed for each request before

        # the view (and later middleware) are called.

        response = get_response(request)

        # Code to be executed for each request/response after

        # the view is called.

        return response

    middleware.process_view = process_view

    return middleware

Answer 2

* process_view()应该返回None一个HttpResponse对象，否则会出现错误。

该函数具有process_view()：

def process_view(request, view_func, view_args, view_kwargs):

    # Do something

def simple_middleware(get_response):

    # One-time configuration and initialization.

    def middleware(request):

        # Code to be executed for each request before

        # the view (and later middleware) are called.

        response = get_response(request)

        # Code to be executed for each request/response after

        # the view is called.

        return response

    middleware.process_view = process_view # Here

    return middleware

班级有process_view()：

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.

        response = self.get_response(request)

        # Code to be executed for each request/response after

        # the view is called.

        return response

    def process_view(self, request, view_func, view_args, view_kwargs):

        # Do something