python - RawPostDataException: You cannot access body after reading from request's data stream -

i hosting site on google cloud , got work beautifully , of sudden start getting error..

01:16:22.222 internal server error: /api/v1/auth/login/ (/base/data/home/apps/s~crs-portal/1.395605052160854207/lib/django/core/handlers/exception.py:124) traceback (most recent call last):   file "/base/data/home/apps/s~crs-portal/1.395605052160854207/lib/django/core/handlers/exception.py", line 39, in inner     response = get_response(request)   file "/base/data/home/apps/s~crs-portal/1.395605052160854207/lib/django/core/handlers/base.py", line 249, in _legacy_get_response     response = self._get_response(request)   file "/base/data/home/apps/s~crs-portal/1.395605052160854207/lib/django/core/handlers/base.py", line 187, in _get_response     response = self.process_exception_by_middleware(e, request)   file "/base/data/home/apps/s~crs-portal/1.395605052160854207/lib/django/core/handlers/base.py", line 185, in _get_response     response = wrapped_callback(request, *callback_args, **callback_kwargs)   file "/base/data/home/apps/s~crs-portal/1.395605052160854207/lib/django/views/decorators/csrf.py", line 58, in wrapped_view     return view_func(*args, **kwargs)   file "/base/data/home/apps/s~crs-portal/1.395605052160854207/lib/django/views/generic/base.py", line 68, in view     return self.dispatch(request, *args, **kwargs)   file "/base/data/home/apps/s~crs-portal/1.395605052160854207/lib/rest_framework/views.py", line 474, in dispatch     response = self.handle_exception(exc)   file "/base/data/home/apps/s~crs-portal/1.395605052160854207/lib/rest_framework/views.py", line 434, in handle_exception     self.raise_uncaught_exception(exc)   file "/base/data/home/apps/s~crs-portal/1.395605052160854207/lib/rest_framework/views.py", line 471, in dispatch     response = handler(request, *args, **kwargs)   file "/base/data/home/apps/s~crs-portal/1.395605052160854207/authentication/views.py", line 42, in post     data = json.loads(request.body)   file "/base/data/home/apps/s~crs-portal/1.395605052160854207/lib/rest_framework/request.py", line 359, in __getattribute__     return getattr(self._request, attr)   file "/base/data/home/apps/s~crs-portal/1.395605052160854207/lib/django/http/request.py", line 263, in body     raise rawpostdataexception("you cannot access body after reading request's data stream") rawpostdataexception: cannot access body after reading request's data stream 

i have no clue means, , endless googling has not solved case in anyway..

here's code relevant:

views.py

class loginview(views.apiview):     def post(self, request, format=none):         data = json.loads(request.body)          email = data.get('email', none)         password = data.get('password', none)          account = authenticate(email=email, password=password)          if account not none:             if account.is_active:                 login(request, account)                  serialized = accountserializer(account)                  return response(serialized.data)             else:                 return response({                     'status': 'unauthorized',                     'message': 'this account has been disabled.'                 }, status=status.http_401_unauthorized)         else:             return response({                 'status': 'unauthorized',                 'message': 'username/password combination invalid.'             }, status=status.http_401_unauthorized) 

serializer.py

class accountserializer(serializers.modelserializer):     password = serializers.charfield(write_only=true, required=false)     confirm_password = serializers.charfield(write_only=true, required=false)      class meta:         model = account         fields = ('id', 'email', 'username', 'created_at', 'updated_at', 'full_name', 'password', 'confirm_password')         read_only_fields = ('created_at', 'updated_at',)          def create(self, validated_data):             return account.objects.create(**validated_data)          def update(self, instance, validated_data):             instance.username = validated_data.get('username', instance.username)              instance.save()              password = validated_data.get('password', none)             confirm_password = validated_data.get('confirm_password', none)              if password , confirm_password , password == confirm_password:                 instance.set_password(password)                 instance.save()              update_session_auth_hash(self.context.get('request'), instance)              return instance 

this occuring because trying access data body

use -> data = json.loads(request.data)