"You cannot access body after reading from request's data stream" #6794

Describe the bug
Cannot import data to a set

To Reproduce
Steps to reproduce the behavior:

1. Creat a project
2. Click on Import data
3. Import URL or files don't work
   4:

"Object { id: "42272f52-0cd5-4b38-ae72-ef10a567b62c", status_code: 500, version: "1.15.0", detail: "You cannot access body after reading from request's data stream", exc_info: Traceback (most recent call last):\n File "C:\\Users\\Sarah\\AppData\\Local\\Programs\\Python\\Python312\\Lib\\site-packages\\rest_framework\\views.py", line 506, in dispatch\n response = handler(request, *args, **kwargs)\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n File "C:\\Users\\Sarah\\AppData\\Local\\Programs\\Python\\Python312\\Lib\\site-packages\\django\\utils\\decorators.py", line 46, in _wrapper\n return bound_method(*args, **kwargs)\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n File "C:\\Users\\Sarah\\AppData\\Local\\Programs\\Python\\Python312\\Lib\\site-packages\\label_studio\\data_import\\api.py", line 256, in post\n return super(ImportAPI, self).post(*args, **kwargs)\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n File "C:\\Users\\Sarah\\AppData\\Local\\Programs\\Python\\Python312\\Lib\\site-packages\\rest_framework\\generics.py", line 194, in post\n return self.create(request, *args, **kwargs)\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n File "C:\\Users\\Sarah\\AppData\\Local\\Programs\\Python\\Python312\\Lib\\site-packages\\label_studio\\data_import\\api.py", line 393, in create\n return self.sync_import(request, project, preannotated_from_fields, commit_to_project, return_task_ids)\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n File "C:\\Users\\Sarah\\AppData\\Local\\Programs\\Python\\Python312\\Lib\\site-packages\\label_studio\\data_import\\api.py", line 273, in sync_import\n parsed_data, file_upload_ids, could_be_tasks_list, found_formats, data_columns = load_tasks(request, project)\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n File "C:\\Users\\Sarah\\AppData\\Local\\Programs\\Python\\Python312\\Lib\\site-packages\\label_studio\\data_import\\uploader.py", line 226, in load_tasks\n if len(request.FILES):\n ^^^^^^^^^^^^^\n File "C:\\Users\\Sarah\\AppData\\Local\\Programs\\Python\\Python312\\Lib\\site-packages\\rest_framework\\request.py", line 447, in FILES\n self._load_data_and_files()\n File "C:\\Users\\Sarah\\AppData\\Local\\Programs\\Python\\Python312\\Lib\\site-packages\\rest_framework\\request.py", line 283, in _load_data_and_files\n self._data, self._files = self._parse()\n ^^^^^^^^^^^^^\n File "C:\\Users\\Sarah\\AppData\\Local\\Programs\\Python\\Python312\\Lib\\site-packages\\rest_framework\\request.py", line 333, in _parse\n stream = self.stream\n ^^^^^^^^^^^\n File "C:\\Users\\Sarah\\AppData\\Local\\Programs\\Python\\Python312\\Lib\\site-packages\\rest_framework\\request.py", line 207, in stream\n self._load_stream()\n File "C:\\Users\\Sarah\\AppData\\Local\\Programs\\Python\\Python312\\Lib\\site-packages\\rest_framework\\request.py", line 313, in _load_stream\n self._stream = io.BytesIO(self.body)\n ^^^^^^^^^\n File "C:\\Users\\Sarah\\AppData\\Local\\Programs\\Python\\Python312\\Lib\\site-packages\\rest_framework\\request.py", line 421, in __getattr__\n return getattr(_request, attr)\n ^^^^^^^^^^^^^^^^^^^^^^^\n File "C:\\Users\\Sarah\\AppData\\Local\\Programs\\Python\\Python312\\Lib\\site-packages\\django\\http\\request.py", line 327, in body\n raise RawPostDataException(\ndjango.http.request.RawPostDataException: You cannot access body after reading from request's data stream\n }"

When importing files.

[c2b17384-3845-4728-953c-2f25b8dfc8d9] Validation error ('content-length')

When adding url

Environment (please complete the following information):

• OS: Win11
• Label Studio Version 1.15.0
• Python 3.12.8