Django框架中间件定义与使用方法案例分析

def init(): 
pass

def process_request(request): 
pass

def process_view(request, view_func, view_args, view_kwargs): 
pass

def process_response(request, response): 
pass

def process_exception(request,exception): 
pass

from django.http import HttpResponse
from django.conf import settings
class MyMiddleWare(object):
  def __init__(self):
    print("init")
  def process_request(self,request):
    print("prcess_request")
  def process_view(self,request,view_func,*view_args,**view_kwargs):
    print("process_view")
  def process_response(self,request,response):
    print("process_response")
    return response
  def process_exception(self,request,exception):
    print("exception")

MIDDLEWARE_CLASSES = (
  'django.contrib.sessions.middleware.SessionMiddleware',
  'django.middleware.common.CommonMiddleware',
  'django.middleware.csrf.CsrfViewMiddleware',
  'django.contrib.auth.middleware.AuthenticationMiddleware',
  'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
  'django.contrib.messages.middleware.MessageMiddleware',
  'django.middleware.clickjacking.XFrameOptionsMiddleware',
  'django.middleware.security.SecurityMiddleware',
  'booktest.middleware.MyMiddleWare',
)

# 首页的视图函数
def index(request):
  print("index")
  return render(request,'booktest/index.html')

# 首页的视图函数
def index(request):
  print("index")
  raise Exception("value error")
  return render(request,'booktest/index.html')