drf 自带token学习记录

一.请求Token 部分
settings.py  #注册app，生成models对应数据库和urls的引用 

INSTALLED_APPS = [

...
'rest_framework.authtoken'
]

核心代码
获取token接口，传递用户密码

url(r'^api-token-auth/',obtain_auth_token),

class ObtainAuthToken(APIView):
。。。。

　　serializer_class = AuthTokenSerializer

def post(self, request, *args, **kwargs):
    serializer = self.serializer_class(data=request.data,
                                       context={'request': request})
    serializer.is_valid(raise_exception=True)
    user = serializer.validated_data['user']
    token, created = Token.objects.get_or_create(user=user)
    return Response({'token': token.key})





验证用户密码模块

class AuthTokenSerializer(serializers.Serializer):
    username = serializers.CharField(label=_("Username"))
    password = serializers.CharField(
        label=_("Password"),
        style={'input_type': 'password'},
        trim_whitespace=False
    )

    def validate(self, attrs):
        username = attrs.get('username')
        password = attrs.get('password')

        if username and password:
            user = authenticate(request=self.context.get('request'),
                                username=username, password=password)

            # The authenticate call simply returns None for is_active=False
            # users. (Assuming the default ModelBackend authentication
            # backend.)
            if not user:
                msg = _('Unable to log in with provided credentials.')
                raise serializers.ValidationError(msg, code='authorization')
        else:
            msg = _('Must include "username" and "password".')
            raise serializers.ValidationError(msg, code='authorization')

        attrs['user'] = user
        return attrs

二. 中间件解析token获取用户部分 

DEFAULT_AUTHENTICATION_CLASSES 配置里面默认调用 下面方法的 authenticate

 ##解析request的 header里面的
知识点 中间件  

REST_FRAMEWORK = {

'DEFAULT_AUTHENTICATION_CLASSES': （

 'rest_framework.authentication.TokenAuthentication'，

）

}

class TokenAuthentication(BaseAuthentication):

　　keyword = 'Token'　　

　　model = None  ##绑定对应ORM数据库

def authenticate(self, request):
    auth = get_authorization_header(request).split()

...
　　return self.authenticate_credentials(token)

#返回token对应的user
　　def authenticate_credentials(self, key):
　　　　model = self.get_model()
　　　　try:
　　　　token = model.objects.select_related('user').get(key=key)
　　　　except model.DoesNotExist:
　　　　raise exceptions.AuthenticationFailed(_('Invalid token.'))

　　　　if not token.user.is_active:
　　　　　　raise exceptions.AuthenticationFailed(_('User inactive or deleted.'))

　　　　return (token.user, token)

def get_model(self):
    if self.model is not None:
        return self.model
    from rest_framework.authtoken.models import Token
    return Token     #返回取值的数据库