Django之CBV

CBV，即Class Base View，类基本视图。
在写API时，我们通常都是使用CBV，而非FBV （Function Base View）。

1. cbv遇到要加装饰器时

1. 需要先导入 from django.utils.decorators import method_decorator
2. 在指定方法上方加@method_decorator(x1) ，其中x1是你希望添加的装饰器

import json
from django.shortcuts import render, HttpResponse
from django.utils.decorators import method_decorator
from django.views import View


class AssetView(View):
    """
    资产相关接口
    """

    @method_decorator(x1)
    def get(self, requset, *args, **kwargs):
        host_list = ['c1.com', 'c2.com', 'c3.com']
        return HttpResponse(json.dumps(host_list))

    @method_decorator(x2)
    def post(self, request, *args, **kwargs):
        info = json.loads(request.body.decode('utf-8'))
        print(info)
        return HttpResponse('收到了')

2. CBV中免除CSRF认证

需要先导入from django.views.decorators.csrf import csrf_exempt

方式一

直接在视图class上加@method_decorator(csrf_exempt, name='dispatch')

import json
from django.shortcuts import render, HttpResponse
from django.views.decorators.csrf import csrf_exempt
from django.utils.decorators import method_decorator
from django.views import View

# 方式一
@method_decorator(csrf_exempt, name='dispatch')
class AssetView(View):
    """
    资产相关接口
    """

    def get(self, requset, *args, **kwargs):
        host_list = ['c1.com', 'c2.com', 'c3.com']
        return HttpResponse(json.dumps(host_list))


    def post(self, request, *args, **kwargs):
        info = json.loads(request.body.decode('utf-8'))
        print(info)
        return HttpResponse('收到了')

方式二

在视图class中加入如下段代码：

# 方式二
@method_decorator(csrf_exempt)
def dispatch(self, request, *args, **kwargs):
     return super().dispatch(request, *args, **kwargs)

示例如下：

import json
from django.shortcuts import render, HttpResponse
from django.views.decorators.csrf import csrf_exempt
from django.utils.decorators import method_decorator
from django.views import View

class AssetView(View):
    """
    资产相关接口
    """

    # 方式二
    @method_decorator(csrf_exempt)
    def dispatch(self, request, *args, **kwargs):
         return super().dispatch(request, *args, **kwargs)


    def get(self, requset, *args, **kwargs):
        host_list = ['c1.com', 'c2.com', 'c3.com']
        return HttpResponse(json.dumps(host_list))


    def post(self, request, *args, **kwargs):
        info = json.loads(request.body.decode('utf-8'))
        print(info)
        return HttpResponse('收到了')

3. django rest_framework

• 自动加csrf_exempt
• 页面变好看
• 自动反序列化

from rest_framework.views import APIView
from rest_framework.response import Response


class AssetView(APIView):
    def get(self, requset, *args, **kwargs):
        host_list = ['c1.com', 'c2.com', 'c3.com']
        # return HttpResponse(json.dumps(host_list))
        return Response(host_list)

    def post(self, request, *args, **kwargs):
        # info = json.loads(request.body.decode('utf-8'))
        # print(info)
        print(request.data)     # json格式
        return HttpResponse('收到了')