django中间件 process_view

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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 response
class 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 response
class 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

django中间件 process_view

标签：epo   ges   elf   callback   roc   9.png   images   alt   return   

原文地址：http://www.cnblogs.com/tiantao36/p/7577118.html