fix: DIA-1803: Stop using deprecated utcnow (#6897)

Co-authored-by: hakan458 <[email protected]>

Author: hakan458

label_studio/core/utils/common.py

@@ -14,7 +14,6 @@
 import traceback as tb
 import uuid
 from collections import defaultdict
-from datetime import datetime
 from functools import wraps
 from typing import Any, Callable, Generator, Iterable, Mapping, Optional
 
@@ -41,6 +40,7 @@
     pre_save,
 )
 from django.db.utils import OperationalError
+from django.utils import timezone
 from django.utils.crypto import get_random_string
 from django.utils.module_loading import import_string
 from django_filters.rest_framework import DjangoFilterBackend
@@ -261,7 +261,7 @@ def datetime_to_timestamp(dt):
 
 
 def timestamp_now():
-    return datetime_to_timestamp(datetime.utcnow())
+    return datetime_to_timestamp(timezone.now())
 
 
 def find_first_one_to_one_related_field_by_prefix(instance, prefix):

label_studio/io_storages/azure_blob/models.py

@@ -3,7 +3,7 @@
 import json
 import logging
 import re
-from datetime import datetime, timedelta
+from datetime import timedelta
 from typing import Union
 from urllib.parse import urlparse
 
@@ -15,6 +15,7 @@
 from django.db import models
 from django.db.models.signals import post_save
 from django.dispatch import receiver
+from django.utils import timezone
 from django.utils.translation import gettext_lazy as _
 from io_storages.base_models import (
     ExportStorage,
@@ -144,7 +145,7 @@ def generate_http_url(self, url):
         container = r.netloc
         blob = r.path.lstrip('/')
 
-        expiry = datetime.utcnow() + timedelta(minutes=self.presign_ttl)
+        expiry = timezone.now() + timedelta(minutes=self.presign_ttl)
 
         sas_token = generate_blob_sas(
             account_name=self.get_account_name(),