Add a central point for checking tokens that are blocked.

I'm about to make the logic here more elaborate, and prefer it in one spot in any case.

Author: ashokdelphia

src/rest_framework_jwt/authentication.py

@@ -70,7 +70,7 @@ def authenticate(self, request):
 
         if apps.is_installed('rest_framework_jwt.blacklist'):
             from rest_framework_jwt.blacklist.models import BlacklistedToken
-            if BlacklistedToken.objects.filter(token=force_str(token)).exists():
+            if BlacklistedToken.is_blocked(token):
                 msg = _('Token is blacklisted.')
                 raise exceptions.PermissionDenied(msg)
 

src/rest_framework_jwt/blacklist/models.py

@@ -5,6 +5,7 @@
 from django.db import models
 from django.db.models import Q
 from django.utils import timezone
+from django.utils.encoding import force_str
 
 
 class BlacklistedTokenManager(models.Manager):
@@ -34,3 +35,8 @@ class Meta:
 
     def __str__(self):
         return 'Blacklisted token - {} - {}'.format(self.user, self.token)
+
+
+    @staticmethod
+    def is_blocked(token):
+        return BlacklistedToken.objects.filter(token=force_str(token)).exists()

src/rest_framework_jwt/blacklist/permissions.py

@@ -15,4 +15,4 @@ def has_permission(self, request, view):
         if token is None:
             return True
 
-        return not BlacklistedToken.objects.filter(token=token).exists()
+        return not BlacklistedToken.is_blocked(token)

src/rest_framework_jwt/utils.py

@@ -10,7 +10,6 @@
 
 from django.apps import apps
 from django.contrib.auth import get_user_model
-from django.utils.encoding import force_str
 
 from rest_framework import serializers
 from rest_framework.utils.encoders import JSONEncoder
@@ -206,7 +205,7 @@ def check_payload(token):
 
     if apps.is_installed('rest_framework_jwt.blacklist'):
         from rest_framework_jwt.blacklist.models import BlacklistedToken
-        if BlacklistedToken.objects.filter(token=force_str(token)).exists():
+        if BlacklistedToken.is_blocked(token):
             msg = _('Token is blacklisted.')
             raise serializers.ValidationError(msg)