标签：int 流程 djang tin llb inf return 请求 strong
对Django而言，中间件就是继承自MiddlewareMixin（位于django.utils.deprecation模块下）的类，该类对请求（request）及响应（response）的过程按照规则执行相应的控制方法，达到访问控制，权限管理，请求认证，数据缓存等等效果。
在django2.x中，项目会默认开启以下中间件，通过查看这些中间件的源码可以得知，
基本上这些内置中间件都重写了基类的process_request(request, *args, **kwargs)以及process_response(request, response *args, **kwargs)方法,
中间件(CsrfViewMiddleware等)重写了process_view(self, request, callback, callback_args, callback_kwargs)
视图(views)执行过程中的错误处理则是通过process_exception(self, request, exception)来控制。
process_request(request, *args, **kwargs)
process_view(self, request, callback, callback_args, callback_kwargs)
process_response(request, response *args, **kwargs) ------process_template_response(self,request,response)
process_exception(self, request, exception)
我们在项目目录(与settings.py同级)下创建middleware包， 并新建test模块其内容如下：
from django.utils.deprecation import MiddlewareMixin class ProcessMiddleware1(MiddlewareMixin): def __str__(self): return ‘middleware 1‘ def process_request(self, request): print(‘%s：\t [%s]‘ % (self.__str__(), ‘process_request‘)) def process_view(self, *args): print(‘%s：\t [%s]‘ % (self.__str__(), ‘process_view‘)) def process_response(self, request, response): print(‘%s：\t [%s]‘ % (self.__str__(), ‘process_response‘)) return response class ProcessMiddleware2(MiddlewareMixin): def __str__(self): return ‘middleware 2‘ def process_request(self, request): print(‘%s：\t [%s]‘ % (self.__str__(), ‘process_request‘)) def process_view(self, *args): print(‘%s：\t [%s]‘ % (self.__str__(), ‘process_view‘)) def process_response(self, request, response): print(‘%s：\t [%s]‘ % (self.__str__(), ‘process_response‘)) return response class ProcessMiddleware3(MiddlewareMixin): def __str__(self): return ‘middleware 3‘ def process_request(self, request): print(‘%s：\t [%s]‘ % (self.__str__(), ‘process_request‘)) def process_view(self, *args): print(‘%s：\t [%s]‘ % (self.__str__(), ‘process_view‘)) def process_response(self, request, response): print(‘%s：\t [%s]‘ % (self.__str__(), ‘process_response‘)) return response
运行结果：
标签：int 流程 djang tin llb inf return 请求 strong
原文地址：https://www.cnblogs.com/kisun168/p/10959820.html
