fix issues:Image file not deleted when a doc is removed #9541 (#10465)

Signed-off-by: root <root@localhost.localdomain>
Co-authored-by: root <root@localhost.localdomain>

api/tasks/clean_document_task.py

@@ -6,6 +6,7 @@ import click
 from celery import shared_task
 
 from core.rag.index_processor.index_processor_factory import IndexProcessorFactory
+from core.tools.utils.web_reader_tool import get_image_upload_file_ids
 from extensions.ext_database import db
 from extensions.ext_storage import storage
 from models.dataset import Dataset, DocumentSegment
@@ -40,6 +41,16 @@ def clean_document_task(document_id: str, dataset_id: str, doc_form: str, file_i
             index_processor.clean(dataset, index_node_ids)
 
             for segment in segments:
+                image_upload_file_ids = get_image_upload_file_ids(segment.content)
+                for upload_file_id in image_upload_file_ids:
+                    image_file = db.session.query(UploadFile).filter(UploadFile.id == upload_file_id).first()
+                    try:
+                        storage.delete(image_file.key)
+                    except Exception:
+                        logging.exception(
+                            "Delete image_files failed when storage deleted, \
+                                          image_upload_file_is: {}".format(upload_file_id)
+                        )
                 db.session.delete(segment)
 
             db.session.commit()