Use ugettext function to translate message strings

Author: migonzalvar

rest_framework_jwt/authentication.py

@@ -1,6 +1,7 @@
 import jwt
 
 from django.utils.encoding import smart_text
+from django.utils.translation import ugettext as _
 from rest_framework import exceptions
 from rest_framework_jwt.settings import api_settings
 from rest_framework.authentication import (BaseAuthentication,
@@ -42,20 +43,20 @@ def authenticate(self, request):
             return None
 
         if len(auth) == 1:
-            msg = 'Invalid Authorization header. No credentials provided.'
+            msg = _('Invalid Authorization header. No credentials provided.')
             raise exceptions.AuthenticationFailed(msg)
         elif len(auth) > 2:
-            msg = ('Invalid Authorization header. Credentials string '
-                   'should not contain spaces.')
+            msg = _('Invalid Authorization header. Credentials string '
+                    'should not contain spaces.')
             raise exceptions.AuthenticationFailed(msg)
 
         try:
             payload = jwt_decode_handler(auth[1])
         except jwt.ExpiredSignature:
-            msg = 'Signature has expired.'
+            msg = _('Signature has expired.')
             raise exceptions.AuthenticationFailed(msg)
         except jwt.DecodeError:
-            msg = 'Error decoding signature.'
+            msg = _('Error decoding signature.')
             raise exceptions.AuthenticationFailed(msg)
 
         user = self.authenticate_credentials(payload)
@@ -72,10 +73,10 @@ def authenticate_credentials(self, payload):
             if user_id is not None:
                 user = User.objects.get(pk=user_id, is_active=True)
             else:
-                msg = 'Invalid payload'
+                msg = _('Invalid payload')
                 raise exceptions.AuthenticationFailed(msg)
         except User.DoesNotExist:
-            msg = 'Invalid signature'
+            msg = _('Invalid signature')
             raise exceptions.AuthenticationFailed(msg)
 
         return user

rest_framework_jwt/serializers.py

@@ -3,6 +3,7 @@
 import jwt
 
 from django.contrib.auth import authenticate
+from django.utils.translation import ugettext as _
 from rest_framework import serializers
 from .compat import Serializer
 
@@ -49,7 +50,7 @@ def validate(self, attrs):
 
             if user:
                 if not user.is_active:
-                    msg = 'User account is disabled.'
+                    msg = _('User account is disabled.')
                     raise serializers.ValidationError(msg)
 
                 payload = jwt_payload_handler(user)
@@ -65,11 +66,11 @@ def validate(self, attrs):
                     'token': jwt_encode_handler(payload)
                 }
             else:
-                msg = 'Unable to login with provided credentials.'
+                msg = _('Unable to login with provided credentials.')
                 raise serializers.ValidationError(msg)
         else:
-            msg = 'Must include "{0}" and "password"'.format(
-                self.username_field)
+            msg = _('Must include "{username_field}" and "password"')
+            msg = msg.format(username_field=self.username_field)
             raise serializers.ValidationError(msg)
 
 
@@ -88,10 +89,10 @@ def validate(self, attrs):
         try:
             payload = jwt_decode_handler(token)
         except jwt.ExpiredSignature:
-            msg = 'Signature has expired.'
+            msg = _('Signature has expired.')
             raise serializers.ValidationError(msg)
         except jwt.DecodeError:
-            msg = 'Error decoding signature.'
+            msg = _('Error decoding signature.')
             raise serializers.ValidationError(msg)
 
         # Make sure user exists (may want to refactor this)
@@ -101,10 +102,10 @@ def validate(self, attrs):
             if user_id is not None:
                 user = User.objects.get(pk=user_id, is_active=True)
             else:
-                msg = 'Invalid payload'
+                msg = _('Invalid payload')
                 raise serializers.ValidationError(msg)
         except User.DoesNotExist:
-            msg = "User doesn't exist"
+            msg = _("User doesn't exist")
             raise serializers.ValidationError(msg)
 
         # Get and check 'orig_iat'
@@ -122,10 +123,10 @@ def validate(self, attrs):
             now_timestamp = timegm(datetime.utcnow().utctimetuple())
 
             if now_timestamp > expiration_timestamp:
-                msg = 'Refresh has expired'
+                msg = _('Refresh has expired')
                 raise serializers.ValidationError(msg)
         else:
-            msg = 'orig_iat field is required'
+            msg = _('orig_iat field is required')
             raise serializers.ValidationError(msg)
 
         new_payload = jwt_payload_handler(user)