refactor code (#583)

### What problem does this PR solve?

### Type of change

- [x] Refactoring

api/apps/api_app.py

@@ -33,7 +33,7 @@ from api.utils.api_utils import server_error_response, get_data_error_result, ge
 from itsdangerous import URLSafeTimedSerializer
 
 from api.utils.file_utils import filename_type, thumbnail
-from rag.utils import MINIO
+from rag.utils.minio_conn import MINIO
 
 
 def generate_confirmation_token(tenent_id):

api/apps/chunk_app.py

@@ -21,7 +21,8 @@ from elasticsearch_dsl import Q
 
 from rag.app.qa import rmPrefix, beAdoc
 from rag.nlp import search, huqie
-from rag.utils import ELASTICSEARCH, rmSpace
+from rag.utils.es_conn import ELASTICSEARCH
+from rag.utils import rmSpace
 from api.db import LLMType, ParserType
 from api.db.services.knowledgebase_service import KnowledgebaseService
 from api.db.services.llm_service import TenantLLMService

api/apps/document_app.py

@@ -27,7 +27,7 @@ from flask_login import login_required, current_user
 from api.db.services.file2document_service import File2DocumentService
 from api.db.services.file_service import FileService
 from rag.nlp import search
-from rag.utils import ELASTICSEARCH
+from rag.utils.es_conn import ELASTICSEARCH
 from api.db.services import duplicate_name
 from api.db.services.knowledgebase_service import KnowledgebaseService
 from api.utils.api_utils import server_error_response, get_data_error_result, validate_request

api/apps/file2document_app.py

@@ -29,7 +29,7 @@ from api.db.services.document_service import DocumentService
 from api.settings import RetCode
 from api.utils.api_utils import get_json_result
 from rag.nlp import search
-from rag.utils import ELASTICSEARCH
+from rag.utils.es_conn import ELASTICSEARCH
 
 
 @manager.route('/convert', methods=['POST'])

api/apps/file_app.py

@@ -33,7 +33,7 @@ from api.settings import RetCode
 from api.utils.api_utils import get_json_result
 from api.utils.file_utils import filename_type
 from rag.nlp import search
-from rag.utils import ELASTICSEARCH
+from rag.utils.es_conn import ELASTICSEARCH
 from rag.utils.minio_conn import MINIO
 
 

api/apps/kb_app.py

@@ -28,7 +28,7 @@ from api.db.db_models import Knowledgebase
 from api.settings import stat_logger, RetCode
 from api.utils.api_utils import get_json_result
 from rag.nlp import search
-from rag.utils import ELASTICSEARCH
+from rag.utils.es_conn import ELASTICSEARCH
 
 
 @manager.route('/create', methods=['post'])