day76_10_23自定义签发token，其他drf组件

from django.db import modelsfrom django.contrib.auth.models import AbstractUser
class User(AbstractUser):
mobile = models.CharField(max_length=11, unique=True) class Meta:
db_table = 'api_user'
verbose_name = '用户表'
verbose_name_plural = verbose_name def __str__(self):
return self.username

from rest_framework import serializers
from . import models
import re# 拿到前台token的两个函数： user => payload => token
# from rest_framework_jwt.settings import api_settings
# jwt_payload_handler = api_settings.JWT_PAYLOAD_HANDLER
# jwt_encode_handler = api_settings.JWT_ENCODE_HANDLER
from rest_framework_jwt.serializers import jwt_payload_handler
from rest_framework_jwt.serializers import jwt_encode_handler# 1) 前台提交多种登录信息都采用一个key，所以后台可以自定义反序列化字段进行对应
# 2) 序列化类要处理序列化与反序列化，要在fields中设置model绑定的Model类所有使用到的字段
# 3) 区分序列化字段与反序列化字段 read_only | write_only
# 4) 在自定义校验规则中（局部钩子、全局钩子）校验数据是否合法、确定登录的用户、根据用户签发token
# 5) 将登录的用户与签发的token保存在序列化类对象中
class UserModelSerializer(serializers.ModelSerializer):
# 自定义反序列字段：一定要设置write_only，只参与反序列化，不会与model类字段映射
usr = serializers.CharField(write_only=True)
pwd = serializers.CharField(write_only=True)
class Meta:
model = models.User
fields = ['usr', 'pwd', 'username', 'mobile', 'email']
# 系统校验规则
extra_kwargs = {
'username': {
'read_only': True
},
'mobile': {
'read_only': True
},
'email': {
'read_only': True
},
} def validate(self, attrs):
usr = attrs.get('usr')
pwd = attrs.get('pwd') # 多方式登录：各分支处理得到该方式下对应的用户
if re.match(r'.+@.+', usr):
user_query = models.User.objects.filter(email=usr)
elif re.match(r'1[3-9][0-9]{9}', usr):
user_query = models.User.objects.filter(mobile=usr)
else:
user_query = models.User.objects.filter(username=usr)
user_obj = user_query.first() # 签发：得到登录用户，签发token并存储在实例化对象中
if user_obj and user_obj.check_password(pwd):
# 签发token，将token存放到 实例化类对象的token 名字中
payload = jwt_payload_handler(user_obj)
token = jwt_encode_handler(payload)
# 将当前用户与签发的token都保存在序列化对象中
self.user = user_obj
self.token = token
return attrs raise serializers.ValidationError({'data': '数据有误'})

#实现多方式登陆签发token：账号、手机号、邮箱等登陆
# 1) 禁用认证与权限组件
# 2) 拿到前台登录信息，交给序列化类
# 3) 序列化类校验得到登录用户与token存放在序列化对象中
# 4) 取出登录用户与token返回给前台
import re
from . import serializers, models
from utils.response import APIResponsefrom rest_framework_jwt.serializers import jwt_payload_handler
from rest_framework_jwt.serializers import jwt_encode_handlerclass LoginAPIView(APIView):
# 1) 禁用认证与权限组件
authentication_classes = []
permission_classes = []
def post(self, request, *args, **kwargs):
# 2) 拿到前台登录信息，交给序列化类，规则：账号用usr传，密码用pwd传
user_ser = serializers.UserModelSerializer(data=request.data)
# 3) 序列化类校验得到登录用户与token存放在序列化对象中
user_ser.is_valid(raise_exception=True)
# 4) 取出登录用户与token返回给前台
return APIResponse(token=user_ser.token, results=serializers.UserModelSerializer(user_ser.user).data) # "一根筋" 思考方式：所有逻辑都在视图类中处理
def my_post(self, request, *args, **kwargs):
usr = request.data.get('usr')
pwd = request.data.get('pwd')
if re.match(r'.+@.+', usr):
user_query = models.User.objects.filter(email=usr)
elif re.match(r'1[3-9][0-9]{9}', usr):
user_query = models.User.objects.filter(mobile=usr)
else:
user_query = models.User.objects.filter(username=usr)
user_obj = user_query.first()
if user_obj and user_obj.check_password(pwd):
payload = jwt_payload_handler(user_obj)
token = jwt_encode_handler(payload)
return APIResponse(results={'username': user_obj.username}, token=token)
return APIResponse(data_msg='不可控错误')

import jwt
from rest_framework_jwt.authentication import BaseJSONWebTokenAuthentication
from rest_framework_jwt.authentication import jwt_decode_handler
from rest_framework.exceptions import AuthenticationFailed
class JWTAuthentication(BaseJSONWebTokenAuthentication):
def authenticate(self, request):
jwt_token = request.META.get('HTTP_AUTHORIZATION') # 自定义校验规则：auth token jwt
token = self.parse_jwt_token(jwt_token) if token is None:
return None try:
# token => payload
payload = jwt_decode_handler(token)
except jwt.ExpiredSignature:
raise AuthenticationFailed('token已过期')
except:
raise AuthenticationFailed('非法用户')
# payload => user
user = self.authenticate_credentials(payload) return (user, token) # 自定义校验规则：auth token jwt，auth为前盐，jwt为后盐
def parse_jwt_token(self, jwt_token):
tokens = jwt_token.split()
if len(tokens) != 3 or tokens[0].lower() != 'auth' or tokens[2].lower() != 'jwt':
return None
return tokens[1]

from rest_framework.views import APIView
from utils.response import APIResponse
# 必须登录后才能访问 - 通过了认证权限组件
from rest_framework.permissions import IsAuthenticated
# 自定义jwt校验规则
from .authentications import JWTAuthentication
class UserDetail(APIView):
authentication_classes = [JWTAuthentication]
permission_classes = [IsAuthenticated]
def get(self, request, *args, **kwargs):
return APIResponse(results={'username': request.user.username})

class Car(models.Model):
name = models.CharField(max_length=16, unique=True, verbose_name='车名')
price = models.DecimalField(max_digits=10, decimal_places=2, verbose_name='价格')
brand = models.CharField(max_length=16, verbose_name='品牌') class Meta:
db_table = 'api_car'
verbose_name = '汽车表'
verbose_name_plural = verbose_name def __str__(self):
return self.name

admin.site.register(models.Car)

class CarModelSerializer(serializers.ModelSerializer):
class Meta:
model = models.Car
fields = ['name', 'price', 'brand']

# Car的群查接口
from rest_framework.generics import ListAPIViewclass CarListAPIView(ListAPIView):
queryset = models.Car.objects.all()
serializer_class = serializers.CarModelSerializer

url(r'^cars/$', views.CarListAPIView.as_view()),