refactor(rag): switch to dify_config. (#6410)

Co-authored-by: -LAN- <laipz8200@outlook.com>

api/core/rag/index_processor/index_processor_base.py

@@ -2,8 +2,7 @@
 from abc import ABC, abstractmethod
 from typing import Optional
 
-from flask import current_app
-
+from configs import dify_config
 from core.model_manager import ModelInstance
 from core.rag.extractor.entity.extract_setting import ExtractSetting
 from core.rag.models.document import Document
@@ -48,7 +47,7 @@ class BaseIndexProcessor(ABC):
             # The user-defined segmentation rule
             rules = processing_rule['rules']
             segmentation = rules["segmentation"]
-            max_segmentation_tokens_length = int(current_app.config['INDEXING_MAX_SEGMENTATION_TOKENS_LENGTH'])
+            max_segmentation_tokens_length = dify_config.INDEXING_MAX_SEGMENTATION_TOKENS_LENGTH
             if segmentation["max_tokens"] < 50 or segmentation["max_tokens"] > max_segmentation_tokens_length:
                 raise ValueError(f"Custom segment length should be between 50 and {max_segmentation_tokens_length}.")