only allow file download if the file has been created in the database…

… first

eNMS/server.py

@@ -324,6 +324,9 @@ def view_service_results(run_id, service):
         @blueprint.route("/download/<type>/<path:path>")
         @self.process_requests
         def download(type, path):
+            db_file = db.fetch(type, path=path, allow_none=True)
+            if not db_file:
+                return {"error": "File not found in database."}
             return_data, full_path = BytesIO(), f"{vs.file_path}/{path}"
             if type == "folder":
                 with open_tar(f"{full_path}.tgz", "w:gz") as tar: