refactor: enhance API token validation with session locking and last used timestamp update (#12426)

Signed-off-by: -LAN- <laipz8200@outlook.com>

api/controllers/service_api/wraps.py

 from collections.abc import Callable
-from datetime import UTC, datetime
+from datetime import UTC, datetime, timedelta
 from enum import Enum
 from functools import wraps
 from typing import Optional
 from flask_login import user_logged_in  # type: ignore
 from flask_restful import Resource  # type: ignore
 from pydantic import BaseModel
+from sqlalchemy import select, update
+from sqlalchemy.orm import Session
 from werkzeug.exceptions import Forbidden, Unauthorized
 
 from extensions.ext_database import db
     return decorator
 
 
-def validate_and_get_api_token(scope=None):
+def validate_and_get_api_token(scope: str | None = None):
     """
     Validate and get API token.
     """
     if auth_scheme != "bearer":
         raise Unauthorized("Authorization scheme must be 'Bearer'")
 
-    api_token = (
-        db.session.query(ApiToken)
-        .filter(
-            ApiToken.token == auth_token,
-            ApiToken.type == scope,
+    current_time = datetime.now(UTC).replace(tzinfo=None)
+    cutoff_time = current_time - timedelta(minutes=1)
+    with Session(db.engine, expire_on_commit=False) as session:
+        update_stmt = (
+            update(ApiToken)
+            .where(ApiToken.token == auth_token, ApiToken.last_used_at < cutoff_time, ApiToken.type == scope)
+            .values(last_used_at=current_time)
+            .returning(ApiToken)
         )
-        .first()
-    )
-
-    if not api_token:
-        raise Unauthorized("Access token is invalid")
-
-    api_token.last_used_at = datetime.now(UTC).replace(tzinfo=None)
-    db.session.commit()
+        result = session.execute(update_stmt)
+        api_token = result.scalar_one_or_none()
+
+        if not api_token:
+            stmt = select(ApiToken).where(ApiToken.token == auth_token, ApiToken.type == scope)
+            api_token = session.scalar(stmt)
+            if not api_token:
+                raise Unauthorized("Access token is invalid")
+        else:
+            session.commit()
 
     return api_token
 

api/docker/entrypoint.sh

       --bind "${DIFY_BIND_ADDRESS:-0.0.0.0}:${DIFY_PORT:-5001}" \
       --workers ${SERVER_WORKER_AMOUNT:-1} \
       --worker-class ${SERVER_WORKER_CLASS:-gevent} \
+      --worker-connections ${SERVER_WORKER_CONNECTIONS:-10} \
       --timeout ${GUNICORN_TIMEOUT:-200} \
       app:app
   fi

api/services/billing_service.py

 import os
-from typing import Optional
+from typing import Literal, Optional
 
 import httpx
 from tenacity import retry, retry_if_exception_type, stop_before_delay, wait_fixed
         params = {"tenant_id": tenant_id}
 
         billing_info = cls._send_request("GET", "/subscription/info", params=params)
-
         return billing_info
 
     @classmethod
         retry=retry_if_exception_type(httpx.RequestError),
         reraise=True,
     )
-    def _send_request(cls, method, endpoint, json=None, params=None):
+    def _send_request(cls, method: Literal["GET", "POST", "DELETE"], endpoint: str, json=None, params=None):
         headers = {"Content-Type": "application/json", "Billing-Api-Secret-Key": cls.secret_key}
 
         url = f"{cls.base_url}{endpoint}"
         response = httpx.request(method, url, json=json, params=params, headers=headers)
-
+        if method == "GET" and response.status_code != httpx.codes.OK:
+            raise ValueError("Unable to retrieve billing information. Please try again later or contact support.")
         return response.json()
 
     @staticmethod

docker/.env.example

 # The number of API server workers, i.e., the number of workers.
 # Formula: number of cpu cores x 2 + 1 for sync, 1 for Gevent
 # Reference: https://docs.gunicorn.org/en/stable/design.html#how-many-workers
-SERVER_WORKER_AMOUNT=
+SERVER_WORKER_AMOUNT=1
 
 # Defaults to gevent. If using windows, it can be switched to sync or solo.
-SERVER_WORKER_CLASS=
+SERVER_WORKER_CLASS=gevent
+
+# Default number of worker connections, the default is 10.
+SERVER_WORKER_CONNECTIONS=10
 
 # Similar to SERVER_WORKER_CLASS.
 # If using windows, it can be switched to sync or solo.

docker/docker-compose.yaml

   APP_MAX_EXECUTION_TIME: ${APP_MAX_EXECUTION_TIME:-1200}
   DIFY_BIND_ADDRESS: ${DIFY_BIND_ADDRESS:-0.0.0.0}
   DIFY_PORT: ${DIFY_PORT:-5001}
-  SERVER_WORKER_AMOUNT: ${SERVER_WORKER_AMOUNT:-}
-  SERVER_WORKER_CLASS: ${SERVER_WORKER_CLASS:-}
+  SERVER_WORKER_AMOUNT: ${SERVER_WORKER_AMOUNT:-1}
+  SERVER_WORKER_CLASS: ${SERVER_WORKER_CLASS:-gevent}
+  SERVER_WORKER_CONNECTIONS: ${SERVER_WORKER_CONNECTIONS:-10}
   CELERY_WORKER_CLASS: ${CELERY_WORKER_CLASS:-}
   GUNICORN_TIMEOUT: ${GUNICORN_TIMEOUT:-360}
   CELERY_WORKER_AMOUNT: ${CELERY_WORKER_AMOUNT:-}