clean un-allowed special charters when doing indexing estimate (#10153)

api/core/indexing_runner.py

 from core.llm_generator.llm_generator import LLMGenerator
 from core.model_manager import ModelInstance, ModelManager
 from core.model_runtime.entities.model_entities import ModelType
+from core.rag.cleaner.clean_processor import CleanProcessor
 from core.rag.datasource.keyword.keyword_factory import Keyword
 from core.rag.docstore.dataset_docstore import DatasetDocumentStore
 from core.rag.extractor.entity.extract_setting import ExtractSetting
             rules = DatasetProcessRule.AUTOMATIC_RULES
         else:
             rules = json.loads(processing_rule.rules) if processing_rule.rules else {}
+        document_text = CleanProcessor.clean(text, rules)
 
-        if "pre_processing_rules" in rules:
-            pre_processing_rules = rules["pre_processing_rules"]
-            for pre_processing_rule in pre_processing_rules:
-                if pre_processing_rule["id"] == "remove_extra_spaces" and pre_processing_rule["enabled"] is True:
-                    # Remove extra spaces
-                    pattern = r"\n{3,}"
-                    text = re.sub(pattern, "\n\n", text)
-                    pattern = r"[\t\f\r\x20\u00a0\u1680\u180e\u2000-\u200a\u202f\u205f\u3000]{2,}"
-                    text = re.sub(pattern, " ", text)
-                elif pre_processing_rule["id"] == "remove_urls_emails" and pre_processing_rule["enabled"] is True:
-                    # Remove email
-                    pattern = r"([a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+)"
-                    text = re.sub(pattern, "", text)
-
-                    # Remove URL
-                    pattern = r"https?://[^\s]+"
-                    text = re.sub(pattern, "", text)
-
-        return text
+        return document_text
 
     @staticmethod
     def format_split_text(text):