refactor(api): enhance request handling and time management

- Initialized `response` variable in `trigger.py` to ensure proper handling in the trigger endpoint.
- Updated `http_parser.py` to conditionally set `CONTENT_TYPE` and `CONTENT_LENGTH` headers for improved robustness.
- Changed `datetime.utcnow()` to `datetime.now(UTC)` in `sqlalchemy_workflow_trigger_log_repository.py` and `rate_limiter.py` for consistent time zone handling.
- Refactored `async_workflow_service.py` to use the public method `get_tenant_owner_timezone` for better encapsulation.
- Simplified subscription retrieval logic in `plugin_parameter_service.py` for clarity.

These changes improve code reliability and maintainability while ensuring accurate time management and request processing.

api/services/async_workflow_service.py

@@ -131,7 +131,7 @@ class AsyncWorkflowService:
             trigger_log_repo.update(trigger_log)
             session.commit()
 
-            tenant_owner_tz = rate_limiter._get_tenant_owner_timezone(trigger_data.tenant_id)
+            tenant_owner_tz = rate_limiter.get_tenant_owner_timezone(trigger_data.tenant_id)
 
             remaining = rate_limiter.get_remaining_quota(trigger_data.tenant_id, dispatcher.get_daily_limit())
 

api/services/plugin/plugin_parameter_service.py

@@ -85,15 +85,14 @@ class PluginParameterService:
                     credential_type = db_record.credential_type
             case "trigger":
                 provider_controller = TriggerManager.get_trigger_provider(tenant_id, TriggerProviderID(provider))
+                subscription: TriggerProviderSubscriptionApiEntity | SubscriptionBuilder | None
                 if credential_id:
-                    subscription: TriggerProviderSubscriptionApiEntity | SubscriptionBuilder | None = (
+                    subscription = (
                         TriggerSubscriptionBuilderService.get_subscription_builder(credential_id)
                         or TriggerProviderService.get_subscription_by_id(tenant_id, credential_id)
                     )
                 else:
-                    subscription: TriggerProviderSubscriptionApiEntity | SubscriptionBuilder | None = (
-                        TriggerProviderService.get_subscription_by_id(tenant_id)
-                    )
+                    subscription = TriggerProviderService.get_subscription_by_id(tenant_id)
 
                 if subscription is None:
                     raise ValueError(f"Subscription {credential_id} not found")

api/services/workflow/rate_limiter.py

@@ -30,7 +30,7 @@ class TenantDailyRateLimiter:
     def __init__(self, redis_client: Union[Redis, RedisClientWrapper]):
         self.redis = redis_client
 
-    def _get_tenant_owner_timezone(self, tenant_id: str) -> str:
+    def get_tenant_owner_timezone(self, tenant_id: str) -> str:
         """
         Get timezone of tenant owner
 
@@ -62,7 +62,7 @@ class TenantDailyRateLimiter:
         Returns:
             Redis key for the current UTC day
         """
-        utc_now = datetime.utcnow()
+        utc_now = datetime.now(UTC)
         date_str = utc_now.strftime("%Y-%m-%d")
         return f"workflow:daily_limit:{tenant_id}:{date_str}"
 
@@ -73,7 +73,7 @@ class TenantDailyRateLimiter:
         Returns:
             Number of seconds until UTC midnight
         """
-        utc_now = datetime.utcnow()
+        utc_now = datetime.now(UTC)
 
         # Get next midnight in UTC
         next_midnight = datetime.combine(utc_now.date() + timedelta(days=1), time.min)