fix: improve file name generation in upload_file function to prevent files with the same name (#3550)

* fix: improve file name generation in upload_file function to prevent files with the same name

* [autofix.ci] apply automated fixes

* fix: improve file name generation in upload_file function

* [autofix.ci] apply automated fixes

* fix: improve file name generation in upload_file function

* fix: improve file path generation in test_upload_file function

---------

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

src/backend/base/langflow/api/v1/files.py

@@ -1,3 +1,4 @@
+from datetime import datetime
 import hashlib
 from http import HTTPStatus
 from io import BytesIO
@@ -45,10 +46,12 @@ async def upload_file(
     try:
         flow_id_str = str(flow_id)
         file_content = await file.read()
+        timestamp = datetime.now().strftime("%Y-%m-%d_%H-%M-%S")
         file_name = file.filename or hashlib.sha256(file_content).hexdigest()
+        full_file_name = f"{timestamp}_{file_name}"
         folder = flow_id_str
-        await storage_service.save_file(flow_id=folder, file_name=file_name, data=file_content)
-        return UploadFileResponse(flowId=flow_id_str, file_path=f"{folder}/{file_name}")
+        await storage_service.save_file(flow_id=folder, file_name=full_file_name, data=file_content)
+        return UploadFileResponse(flowId=flow_id_str, file_path=f"{folder}/{full_file_name}")
     except Exception as e:
         raise HTTPException(status_code=500, detail=str(e))
 

src/backend/tests/unit/test_files.py

@@ -1,3 +1,4 @@
+import re
 from unittest.mock import MagicMock
 
 import pytest
@@ -29,10 +30,13 @@ def test_upload_file(client, mock_storage_service, created_api_key, flow):
         headers=headers,
     )
     assert response.status_code == 201
-    assert response.json() == {
-        "flowId": str(flow.id),
-        "file_path": f"{flow.id}/test.txt",
-    }
+
+    response_json = response.json()
+    assert response_json["flowId"] == str(flow.id)
+
+    # Check that the file_path matches the expected pattern
+    file_path_pattern = re.compile(rf"{flow.id}/\d{{4}}-\d{{2}}-\d{{2}}_\d{{2}}-\d{{2}}-\d{{2}}_test\.txt")
+    assert file_path_pattern.match(response_json["file_path"])
 
 
 def test_download_file(client, mock_storage_service, created_api_key, flow):
@@ -75,30 +79,33 @@ def test_file_operations(client, created_api_key, flow):
         headers=headers,
     )
     assert response.status_code == 201
-    assert response.json() == {
-        "flowId": str(flow_id),
-        "file_path": f"{flow_id}/{file_name}",
-    }
+
+    response_json = response.json()
+    assert response_json["flowId"] == str(flow_id)
+
+    # Check that the file_path matches the expected pattern
+    file_path_pattern = re.compile(rf"{flow_id}/\d{{4}}-\d{{2}}-\d{{2}}_\d{{2}}-\d{{2}}-\d{{2}}_{file_name}")
+    assert file_path_pattern.match(response_json["file_path"])
+
+    # Extract the full file name with timestamp from the response
+    full_file_name = response_json["file_path"].split("/")[-1]
 
     # Step 2: List files in the folder
     response = client.get(f"api/v1/files/list/{flow_id}", headers=headers)
     assert response.status_code == 200
-    assert file_name in response.json()["files"]
+    assert full_file_name in response.json()["files"]
 
     # Step 3: Download the file and verify its content
-
-    response = client.get(f"api/v1/files/download/{flow_id}/{file_name}", headers=headers)
+    response = client.get(f"api/v1/files/download/{flow_id}/{full_file_name}", headers=headers)
     assert response.status_code == 200
     assert response.content == file_content
-    # the headers are application/octet-stream
     assert response.headers["content-type"] == "application/octet-stream"
-    # mime_type is inside media_type
 
     # Step 4: Delete the file
-    response = client.delete(f"api/v1/files/delete/{flow_id}/{file_name}", headers=headers)
+    response = client.delete(f"api/v1/files/delete/{flow_id}/{full_file_name}", headers=headers)
     assert response.status_code == 200
-    assert response.json() == {"message": f"File {file_name} deleted successfully"}
+    assert response.json() == {"message": f"File {full_file_name} deleted successfully"}
 
     # Verify that the file is indeed deleted
     response = client.get(f"api/v1/files/list/{flow_id}", headers=headers)
-    assert file_name not in response.json()["files"]
+    assert full_file_name not in response.json()["files"]