DRF 请求和响应

请求

REST里面有个HttpRequest特别相似的对象叫request，主要获取前端传递过来的数据，获取数据的方法就是request.data

响应

REST里面有个HttpResponse特别相似的对象叫Response,主要用来给前端传递数据，传递数据的方法就是Response(data)

状态码

REST里面的状态码比较人性化。每个状态都用意思去表示。比如

HTTP_200_OK = 200 #OK
HTTP_201_CREATED = 201 #创建成功
HTTP_403_FORBIDDEN = 403 # 权限拒绝
'''
'''

API视图

API视图主要为了咱们RESTFUL风格的API。主要用来包装request,response、现在api请求方法。

• 基于函数视图的@api_view装饰器
• 基于类视图的APIView类

• from rest_framework.decorators import api_view
  from rest_framework.response import Response
  from rest_framework import status
  
  @api_view(['GET', 'POST'])
  def user_list(request):
      if request.method == 'GET':
          users = User.objects.all()
          serializer = UserSerializer(users, many=True)
          return Response(serializer.data,status=status.HTTP_200_OK)
  
      elif request.method == 'POST':
          serializer = UserSerializer(data=request.data)
          if serializer.is_valid():
              serializer.save()
              return Response(serializer.data, status=status.HTTP_201_CREATED)
          return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

  from rest_framework.views import APIView
  from rest_framework.response import Response
  from rest_framework import status
  from django.http import Http404
  
  class UserDetail(APIView):
      def get_user(self, id):
          try:
              user = User.objects.get(id=id)
              return user
          except User.DoesNotExist:
              raise Http404
  
      def get(self, request, *args, **kwargs):
          user = self.get_user(kwargs.get('id'))
          serializer = UserSerializer(user, context={'request': request})
          return Response(serializer.data)
  
      def put(self, request, *args, **kwargs):
          user = self.get_user(kwargs.get('id'))
          serializer = UserSerializer(user, data=request.data, context={'request': request})
          if serializer.is_valid():
              serializer.save()
              return Response(serializer.data)
          return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
  
      def detete(self, request, *args, **kwargs):
          user = self.get_user(kwargs.get('id'))
          user.delete()
          return Response(status=status.HTTP_204_NO_CONTENT)

  类视图取消csrf

• from django.views.decorators.csrf import csrf_exempt
  from django.utils.decorators import method_decorator
  @method_decorator(csrf_exempt,name='dispatch')
  class xxx(APIView)