from rest_framework.versioning import

# DRF的配置
REST_FRAMEWORK = {
    # 配置默认使用的版本控制类
    ‘DEFAULT_VERSIONING_CLASS‘: ‘rest_framework.versioning.URLPathVersioning‘,
    ‘DEFAULT_VERSION‘: ‘v1‘,  # 默认的版本
    ‘ALLOWED_VERSIONS‘: [‘v1‘, ‘v2‘],  # 有效的版本
    ‘VERSION_PARAM‘: ‘version‘,  # 版本的参数名与URL conf中一致
}　　

url(r‘(?P<version>[v1|v2]+)/books/$‘, views.BookListView.as_view()),　　

class BookListView(ListCreateAPIView):
    """查看列表和创建"""
    queryset = models.Book.objects.all()
    serializer_class = BookModelSerializer

    # 只要配置了版本 在视图中就能通过 request.version

    def get_serializer_class(self):
        """获取当前序列化类的方法"""
        # 根据版本的不同返回不同的序列化类
        print(self.request.version)
        if self.request.version == ‘v1‘:
            return BookSerializerVersion1
        return self.serializer_class

class PublisherViewSet(ModelViewSet):

    ...
    versioning_class = URLPathVersioning

class UserInfo(models.Model):
    name = models.CharField(max_length=32)
    pwd = models.CharField(max_length=32)
    vip = models.BooleanField(default=False)
    token = models.CharField(max_length=128,null=True,blank=True)

url(r‘users/‘,include(‘auth_demo.urls‘)),

urlpatterns = [
    url(r‘reg/$‘,views.RegView.as_view()),
    url(r‘login/$‘,views.LoginView.as_view()),
    url(r‘test_auth/$‘,views.TesAuthView.as_view()),

]

from django.shortcuts import render
from rest_framework.views import APIView
from auth_demo import models
from rest_framework.response import Response
import uuid



class RegView(APIView):
    def post(self, request):
        # 获取用户注册的数据
        name = request.data.get(‘name‘)
        pwd = request.data.get(‘pwd‘)
        re_pwd = request.data.get(‘re_pwd‘)
        if name and pwd:
            if pwd == re_pwd:
                models.UserInfo.objects.create(name=name, pwd=pwd)
                return Response(‘注册成功‘)
            else:
                return Response(‘两次密码不正确‘)
        else:
            return Response(‘无效参数‘)


class LoginView(APIView):
    def post(self, request):
        name = request.data.get(‘name‘)
        pwd = request.data.get(‘pwd‘)
        if name and pwd:
            user_obj = models.UserInfo.objects.filter(name=name, pwd=pwd).first()
            if user_obj:
                # 生成token  保存在用户表,  给用户返回
                token = uuid.uuid1().hex
                user_obj.token = token
                user_obj.save()
                return Response({‘error_on‘: 1, ‘error‘: token})

            else:
                return Response({‘error_on‘: 1, ‘error‘: ‘用户名或密码错误‘})
        else:
            return Response(‘无效参数‘)　

from auth_demo.auth import MyAuth
# 登录之后才能看到的数据接口
class TesAuthView(APIView):
    authentication_classes = [MyAuth, ]  # 局部配置认证
    def get(self, request):
        return Response(‘这里只能是登陆后才能看到的地方‘)　　

REST_FRAMEWORK = {
    ‘DEFAULT_AUTHENTICATION_CLASSES‘: [‘auth_demo.auth.MyAuth‘, ]
}　　

from rest_framework.authentication import BaseAuthentication
from auth_demo import models
from rest_framework.exceptions import AuthenticationFailed#别人写的抛出异常


class MyAuth(BaseAuthentication):
    def authenticate(self, request):
        #拿到页面?后面的数据
        token = request.query_params.get(‘token‘)
        if token:
            user_obj = models.UserInfo.objects.filter(token=token).first()
            if user_obj:
                # token是有效的,记住要对象和token
                return user_obj,token
            else:
                # 抛出异常
                raise AuthenticationFailed(‘无效的token‘)
        else:
            raise AuthenticationFailed(‘请求的URL中必须携带token参数‘)

‘‘‘
自定义一个权限组件
‘‘‘
from rest_framework.permissions import BasePermission
from auth_demo import models


class MyPermission(BasePermission):
    #提示
    message = ‘这是vip才能访问‘

    def has_permission(self, request, view):
        # 如果你是VIP才有权限访问
        # request.user:当前经过认证的用户对象
        if request.user.vip:
            return True
        else:
            return False　　

    ‘DEFAULT_PERMISSION_CLASSES‘: [‘auth_demo.permissions.MyPermission‘, ]　

from auth_demo.auth import MyAuth
from auth_demo.permissions import MyPermission
# 登录之后才能看到的数据接口
class TesAuthView(APIView):
    authentication_classes = [MyAuth, ]  # 局部配置认证
    permission_classes = [MyPermission, ]#局部配置权限
    def get(self, request):
        return Response(‘这里只能是登陆后才能看到的地方‘)