diff --git a/learnware/tests/data.py b/learnware/tests/data.py
index 422392c..30c6c81 100644
--- a/learnware/tests/data.py
+++ b/learnware/tests/data.py
@@ -1,3 +1,40 @@
 
+import json
+import requests
+from tqdm import tqdm
+
+from ..config import C
+
+
 class GetData:
-    pass
\ No newline at end of file
+    def __init__(self, host=None, chunk_size=1024 * 1024):
+        self.headers = None
+
+        if host is None:
+            self.host = C.backend_host
+        else:
+            self.host = host
+
+        self.chunk_size = chunk_size
+
+    def download_file(self, file_path: str, save_path: str):
+        url = f"{self.host}/engine/download"
+
+        response = requests.get(
+            url,
+            params={
+                "file_path": file_path,
+            },
+            stream=True,
+        )
+
+        if response.status_code != 200:
+            raise Exception("download failed: " + json.dumps(response.json()))
+
+        num_chunks = int(response.headers["Content-Length"]) // self.chunk_size + 1
+        bar = tqdm(total=num_chunks, desc="Downloading", unit="MB")
+
+        with open(save_path, "wb") as f:
+            for chunk in response.iter_content(chunk_size=self.chunk_size):
+                f.write(chunk)
+                bar.update(1)
\ No newline at end of file