django中间件 process_view

先执行所有的request

在执行所有的view

在执行reponse

url匹配路由

class M1(MiddlewareMixin):    def process_request(self, request):        print(‘m1.process_request‘)

def process_view(self, request, callback, callback_args, callback_kwargs):        """        如果有返回值，则不在继续执行，直接到最后一个中间件的response        """        print(‘m1.process_view‘, callback)        # return HttpResponse(‘Process View返回值‘)    def process_response(self,request, response):        print(‘m1.prcess_response‘)        return responseclass M2(MiddlewareMixin):    def process_request(self, request):        print(‘m2.process_request‘)

def process_view(self, request, callback, callback_args, callback_kwargs):        """        如果有返回值，则不在继续执行，直接到最后一个中间件的response        """        print(‘m2.process_view‘, callback)        # return HttpResponse(‘Process View返回值‘)

def process_response(self,request, response):        print(‘m2.prcess_response‘)        return response

m1.process_request
m2.process_request
m1.process_view <function LoginView at 0x0000000003B531E0>
m2.process_view <function LoginView at 0x0000000003B531E0>
m2.prcess_response
m1.prcess_response

callback视图函数名

从哪里可以知道是怎么执行的，看process_view。

process_view能不能有返回值

如果proces——view有返回值，后面的proces_view就不执行了

class M1(MiddlewareMixin):    def process_request(self, request):        print(‘m1.process_request‘)

def process_view(self, request, callback, callback_args, callback_kwargs):        """        如果有返回值，则不在继续执行，直接到最后一个中间件的response        """        print(‘m1.process_view‘, callback)        return HttpResponse(‘Process View返回值‘)    def process_response(self,request, response):        print(‘m1.prcess_response‘)        return responseclass M2(MiddlewareMixin):    def process_request(self, request):        print(‘m2.process_request‘)

def process_view(self, request, callback, callback_args, callback_kwargs):        """        如果有返回值，则不在继续执行，直接到最后一个中间件的response        """        print(‘m2.process_view‘, callback)        # return HttpResponse(‘Process View返回值‘)

def process_response(self,request, response):        print(‘m2.prcess_response‘)        return response结果：

m1.process_request
m2.process_request
m1.process_view <function LoginView at 0x0000000003B631E0>
m2.prcess_response
m1.prcess_response