中间件是全局使用
工厂函数定义中间件
python
# 工厂函数的中间件
def simple_middleware(get_response):
def middleware(request):
print("在视图函数处理之前执行、、、、、")
response = get_response(request)
print("在视图函数处理之后执行。。。。。")
return response
return middleware
setings.py中注册中间件
python
MIDDLEWARE = [
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
# 'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'the_15.middleware.simple_middleware',
]
类定义中间件
python
# 类定义中间件
from django.utils.deprecation import MiddlewareMixin
class Mwi(MiddlewareMixin):
def process_request(self, request):
"""
如果没有返回值或者返回值为 None 就会继续执行视图函数
如果有返回值就不会执行视图函数中的内容,直接返回值,
"""
print("process_request 在视图函数之前执行、、、、、")
pass
def process_View(self, request, view_func, view_args, view_kwargs):
print('process_View 正在执行中')
pass
def process_response(self, request, response):
"""
一定要有返回值
"""
print("process_response 在视图函数之后执行、、、、、")
return response
setings.py中注册中间件
python
MIDDLEWARE = [
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
# 'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
# 'the_15.middleware.simple_middleware',
'the_15.middleware.Mwi',
]
执行顺序
中间件的属性与方法
▶ get_response
▶ process_request(self, request)
▶ process_view(self, request, view_func, view_args, view_kwargs)
▶ process_response(self, request, response)
▶ process_template_response(self, request, response)