django drf 实现只有超级用户才能注册账号(涉及自定义权限permissions，获取token信息解析token信息)

from django.contrib.auth import get_user_model
User = get_user_model()
class RegisterSerializers(serializers.ModelSerializer):
    '''增加用户的序列化器'''
    class Meta:
        # 指定模型类
        model = User
        # 指定模型字段
        fields = ['username','password','mobile','email']
        # 为序列化器字段添加约束
        extra_kwargs = {
            'username': {
                'max_length': 20,
                'min_length': 3
            },
            'password': {
                'max_length': 20,
                'min_length': 6,
                'write_only': True
            },
        }
    def create(self, validated_data):
        '''重写create方法实现，将密码加密后保存'''
        # 将密码加密后保存
        user = User.objects.create_user(**validated_data)
        return user

from django.contrib.auth import get_user_model
from rest_framework import status
from rest_framework.response import Response
from rest_framework.views import APIView
from rest_framework_simplejwt.views import TokenViewBase
from apps.users.permissions import IsSuperUser
from .serializers import MyTokenSerializer, RegisterSerializers
User = get_user_model()
class RegisterView(APIView):
  #使用权限（permission_classes = (IsSuperUser,)），IsSuperUser这是自定义权限，只允许超级用户访问
  #(IsSuperUser,)这样才是元组，(IsSuperUser)这个不是
    permission_classes = (IsSuperUser,)
    def post(self,request):
        re=RegisterSerializers(data=request.data)
        username=request.data['username']
        try:
            if re.is_valid():
                re.save()
                return Response(data=re.data, status=status.HTTP_200_OK)
            return Response(data=re.errors, status=status.HTTP_400_BAD_REQUEST)
        except:
            # 虽然报错了，但是数据确实落库了，只需要判断下前端传的用户名在数据库里面能找到就行
            user=User.objects.filter(username=username).first()
            if user:
                return Response({'msg':'注册成功','username':username},status=status.HTTP_200_OK)
            return Response({'msg':'注册失败'},status=status.HTTP_400_BAD_REQUEST)

import base64
from rest_framework import permissions
from django.contrib.auth import get_user_model
User = get_user_model()
def get_token_user_id(token_raw):
    token = token_raw.replace('Bearer ', '')
    token = token.split('.')
    # base64加密需要是4的整数倍，不够的话要用=补齐
    user_info_mi = token[1]
    print(len(user_info_mi))
    if len(user_info_mi) % 4 == 0:
        user_info_mi = user_info_mi
    else:
        user_info_mi = user_info_mi + '='
    user_info = base64.b64decode(user_info_mi).decode("utf-8")
    print(user_info)
    #字符转下字典
    user_info = eval(user_info)
    return user_info['user_id']
class IsSuperUser(permissions.BasePermission):
    '''只有管理员才能操作注册接口'''
    def has_permission(self, request, view):
        """
        :param request: 请求参数信息
        :param view: #当前访问的视图
        :return: bool
        """
        # 去headers里面拿到token的信息
        token_raw = request.headers.get('Authorization')
        is_superuser = User.objects.filter(id=get_token_user_id(token_raw)).first().is_superuser
        print(is_superuser)
        if is_superuser:
            return True
        return False