Django使用中间键实现csrf认证详解

来源：jb51　　时间：2019/7/22 11:24:46　　对本文有异议

Django中的csrf认证实现的原理

调用 process_view 方法

检查视图是否被 @csrf_exempt （免除csrf认证）

- 去请求体或cookie中获取token

情况一（全站使用csrf认证，局部不想使用csrf认证）

MIDDLEWARE = [
            'django.middleware.security.SecurityMiddleware',
            'django.contrib.sessions.middleware.SessionMiddleware',
            'django.middleware.common.CommonMiddleware',
            'django.middleware.csrf.CsrfViewMiddleware', # 全站使用csrf认证
            'django.contrib.auth.middleware.AuthenticationMiddleware',
            'django.contrib.messages.middleware.MessageMiddleware',
            'django.middleware.clickjacking.XFrameOptionsMiddleware',
          ]

如果我想让某个请求不通过csrf认证可以这样做

from django.views.decorators.csrf import csrf_exempt
@csrf_exempt # 该函数无需认证
def users(request):
  user_list = ['alex','oldboy']
  return HttpResponse(json.dumps((user_list)))

情况二（全站不使用csrf认证，局部想使用csrf认证）

MIDDLEWARE = [
  'django.middleware.security.SecurityMiddleware',
  'django.contrib.sessions.middleware.SessionMiddleware',
  'django.middleware.common.CommonMiddleware',
  #'django.middleware.csrf.CsrfViewMiddleware', # 全站不使用csrf认证
  'django.contrib.auth.middleware.AuthenticationMiddleware',
  'django.contrib.messages.middleware.MessageMiddleware',
  'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

如果我想让某个请求使用csrf认证可以这样做

from django.views.decorators.csrf import csrf_exempt,csrf_protect
@csrf_protect # 该函数需认证
def users(request):
  user_list = ['alex','oldboy']
  return HttpResponse(json.dumps((user_list)))

CBV小知识,csrf时需要使用

- @method_decorator(csrf_exempt)

- 在dispatch方法中（单独方法无效）

方式一

from django.views.decorators.csrf import csrf_exempt,csrf_protect
from django.utils.decorators import method_decorator
class StudentsView(View):
  
  @method_decorator(csrf_exempt)
  def dispatch(self, request, *args, **kwargs):
    return super(StudentsView,self).dispatch(request, *args, **kwargs)
 
  def get(self,request,*args,**kwargs):
    print('get方法')
    return HttpResponse('GET')
 
  def post(self, request, *args, **kwargs):
    return HttpResponse('POST')
 
  def put(self, request, *args, **kwargs):
    return HttpResponse('PUT')
 
  def delete(self, request, *args, **kwargs):
    return HttpResponse('DELETE')

方式二

from django.views.decorators.csrf import csrf_exempt,csrf_protect
from django.utils.decorators import method_decorator
 
@method_decorator(csrf_exempt,name='dispatch')
class StudentsView(View):
 
  def get(self,request,*args,**kwargs):
    print('get方法')
    return HttpResponse('GET')
 
  def post(self, request, *args, **kwargs):
    return HttpResponse('POST')
 
  def put(self, request, *args, **kwargs):
    return HttpResponse('PUT')
 
  def delete(self, request, *args, **kwargs):
    return HttpResponse('DELETE')