python中间件
Posted konglingxi
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1.中间件的方法
process_request(self,request) process_view(self, request, callback, callback_args, callback_kwargs) process_template_response(self,request,response) process_exception(self, request, exception) process_response(self, request, response
2.中间件运行机制
a.玩法1
from django.utils.deprecation import MiddlewareMixin
class M1(MiddlewareMixin):
def process_request(self, request):
print(‘M1.request‘)
def process_view(self, request,callback,callback_args,callback_kwargs ):
print("M1.process_view")
def process_response(self, request, response):
print(‘M1.response‘)
return response
class M2(MiddlewareMixin):
def process_request(self, request):
print(‘M2.request‘)
def process_view(self, request,callback,callback_args,callback_kwargs ):
print("M2.process_view")
def process_response(self, request, response):
print(‘M2.response‘)
return response
#### 输出结果 M1.request M2.request M1.process_view M2.process_view #执行views视图 M2.response M1.response
b.玩法2
from django.utils.deprecation import MiddlewareMixin
class M1(MiddlewareMixin):
def process_request(self, request):
print(‘M1.request‘)
# callback视图函数名称 callback_args,callback_kwargs 视图函数执行所需的参数
def process_view(self, request,callback,callback_args,callback_kwargs ):
print("M1.process_view")
response=callback(request,*callback_args,**callback_kwargs)
return response
def process_response(self, request, response):
print(‘M1.response‘)
return response
class M2(MiddlewareMixin):
def process_request(self, request):
print(‘M2.request‘)
def process_view(self, request,callback,callback_args,callback_kwargs ):
print("M2.process_view")
def process_response(self, request, response):
print(‘M2.response‘)
return response
####输出结果 M1.request M2.request M1.process_view #执行views视图函数 M2.response M1.response
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