django rest framwork的权限验证实例-尊龙凯时

from rest_framework.permissions import isauthenticated # 判断用户是否登录
from rest_framework_jwt.authentication import jsonwebtokenauthentication # jwt用户认证
class userfavviewset(mixins.createmodelmixin, mixins.listmodelmixin, mixins.retrievemodelmixin,
      mixins.destroymodelmixin, viewsets.genericviewset):
 """
 list:
  获取用户收藏列表
 retrieve:
  判断某个商品是否已经收藏
 create:
  收藏商品
 delete:
  取消收藏
 """
 # 权限判断：isauthenticated表示是否已经登录，isownerorreadonly表示数据是不是属于当前登录用户
 permission_classes = (isauthenticated, isownerorreadonly)
 # 用户认证：方式一：jsonwebtokenauthentication；方式二：sessionauthentication
 authentication_classes = (jsonwebtokenauthentication, sessionauthentication)
 # 定义通过哪个参数来定位实例
 lookup_field = "goods_id" # 在详细页面时，搜索goods_id来确认该商品有没有被收藏，是在当前用户下进行搜索的
 def get_queryset(self):
  """获取当前登录用户的收藏信息"""
  return userfav.objects.filter(user=self.request.user)
 # 方法一：修改商品收藏数
 # def perform_create(self, serializer):
 #  """修改商品收藏数"""
 #  instance = serializer.save()
 #  goods = instance.goods
 #  goods.fav_num  = 1
 #  goods.save()
 # 动态设置序列化类
 def get_serializer_class(self):
  if self.action == "list":
   return userfavdetailserializer
  elif self.action == "create":
   return userfavserializer
  return userfavserializer

from rest_framework import permissions
# 权限判断：数据是不是属于当前登录用户
class isownerorreadonly(permissions.basepermission):
 """
 object-level permission to only allow owners of an object to edit it.
 assumes the model instance has an `owner` attribute.
 """
 def has_object_permission(self, request, view, obj):
  # 1 只读
  # read permissions are allowed to any request,
  # so we'll always allow get, head or options requests.
  if request.method in permissions.safe_methods: # 是不是安全的访问方法
   return true
 # 2 写权限
  # instance must have an attribute named `owner`.
  # return (obj.publisher if obj.publisher else self.fans )== request.user
  return obj.user== request.user # 判断当前数据是不是登录用户的数据

class userfavviewset(mixins.createmodelmixin, mixins.listmodelmixin, mixins.retrievemodelmixin,
      mixins.destroymodelmixin, viewsets.genericviewset):
 """
 list:
  获取用户收藏列表
 retrieve:
  判断某个商品是否已经收藏
 create:
  收藏商品
  delete:
   取消收藏
 """
 # 权限判断：isauthenticated表示是否已经登录，isownerorreadonly表示数据是不是属于当前登录用户
 permission_classes = (isauthenticated, isownerorreadonly)
 # 用户认证：方式一：jsonwebtokenauthentication；方式二：sessionauthentication
 authentication_classes = (jsonwebtokenauthentication, sessionauthentication)
 # 设置
 lookup_field = "goods_id" # 在详细页面时，搜索goods_id来确认该商品有没有被收藏，是在当前用户下进行搜索的
 def get_queryset(self):
  """获取当前登录用户的收藏信息"""
  return userfav.objects.filter(user=self.request.user)

from rest_framework import permissions
class isownerorreadonly(permissions.basepermission):
  '''
  常规的授权是 只有拥有者才能编辑它
  '''
  def has_object_permission(self, request, view, obj):
    # 读权限 向所有请求开放
    # 所以我们总是允许get, head or options requests.
    if request.method in permissions.safe_methods:
      return true
    # 写权限 只给拥有者
    return obj.owner == request.user

'''基于泛型类的视图'''
from snippets.models import snippet
from snippets.serializers import snippetserializer, userserializer
from rest_framework import generics
from snippets.permissions import isownerorreadonly
from django.contrib.auth.models import user
class userlist(generics.listapiview):
  '''
  user表的列表api视图 查 增 操作
  '''
  queryset = user.objects.all()
  serializer_class = userserializer
class userdetail(generics.retrievedestroyapiview):
  '''
  user表的详情api视图 查 改 删操作
  '''
  queryset = user.objects.all()
  serializer_class = userserializer
class snippetlist(generics.listcreateapiview):
  permission_classes = [permissions.isauthenticatedorreadonly]
  queryset = snippet.objects.all()
  serializer_class = snippetserializer
  def perform_create(self, serializer):
    serializer.save(owner=self.request.user)
class snippetdetail(generics.retrievedestroyapiview):
  # detail 所有人都能读，但是只有拥有者可以更改
  # permissions.isauthenticatedorreadonly 表示没有认证的人有读的权限，认证的人有所有权限
  # isownerorreadonly 通过了前面的授权之后，还要通过这个授权
  # 当所有的授权都通过的时候 所有的对象实例都返回true 表示授权通过
  permission_classes = [permissions.isauthenticatedorreadonly, isownerorreadonly]
  queryset = snippet.objects.all()
  serializer_class = snippetserializer