Refactor (#537)

### What problem does this PR solve?

### Type of change

- [x] Refactoring

rag/svr/cache_file_svr.py

@@ -0,0 +1,43 @@
+import random
+import time
+import traceback
+
+from api.db.db_models import close_connection
+from api.db.services.task_service import TaskService
+from rag.utils import MINIO
+from rag.utils.redis_conn import REDIS_CONN
+
+
+def collect():
+    doc_locations = TaskService.get_ongoing_doc_name()
+    #print(tasks)
+    if len(doc_locations) == 0:
+        time.sleep(1)
+        return
+    return doc_locations
+
+def main():
+    locations = collect()
+    if not locations:return
+    print("TASKS:", len(locations))
+    for kb_id, loc in locations:
+        try:
+            if REDIS_CONN.is_alive():
+                try:
+                    key = "{}/{}".format(kb_id, loc)
+                    if REDIS_CONN.exist(key):continue
+                    file_bin = MINIO.get(kb_id, loc)
+                    REDIS_CONN.transaction(key, file_bin, 12 * 60)
+                    print("CACHE:", loc)
+                except Exception as e:
+                    traceback.print_stack(e)
+        except Exception as e:
+            traceback.print_stack(e)
+
+
+
+if __name__ == "__main__":
+    while True:
+        main()
+        close_connection()
+        time.sleep(1)