I have been trying to write code either via

POST /d2l/api/le/(version)/(orgUnitId)/dropbox/folders/(folderId)/feedback/(entityType)/(entityId)/attach or

POST /d2l/api/le/(version)/(orgUnitId)/dropbox/folders/(folderId)/feedback/(entityType)/(entityId)/upload

I've been trying to upload a specific small file as a test, and have been receiving a 400, 404, or 416 error when trying to upload. In contrast, I have been able to use my Python script to post grades, dropbox score, and text/html feedback. Would you be able to provide some pointers as to the form of the payload required? Also, my admin has enabled the current scopes:

SCOPE = "core:*.* : dropbox:access:read dropbox:folders:read,write enrollment:orgunit:read grades:access:read grades:gradecategories:read grades:gradeobjects:read grades:gradevalues:read,write quizzing:access:read quizzing:attempts:read quizzing:quizzes:read managefiles:*.*"

The function call below this post is what I attempted for file uploading in Python (spacing messed up in cut/paste). Do you have any suggestions? Thanks in advance for any help you can provide.

def attach_feedback_file_prototype(access_token, org_unit_id, folder_id, user_id, file_path):
"""

Attaches a feedback file by POSTing the raw file data.This function implements:

POST /d2l/api/le/(version)/(orgUnitId)/dropbox/folders/(folderId)/feedback/(entityType)/(entityId)/attach?filename=...

"""


print(f"Preparing to attach file '{file_path}' to User ID {user_id}...")


# 1. Get file details

if not os.path.exists(file_path):

    print(f"❌ ERROR: File not found: {file_path}")

    return


file_name = os.path.basename(file_path)

mime_type, _ = mimetypes.guess_type(file_path)

if mime_type is None:

    mime_type = 'application/octet-stream' # Default


entity_type = "user" 


# 2. Build API URL, Headers, and Params

api_url = (

    f"{API_BASE_URL}/d2l/api/le/{API_VERSION}/{org_unit_id}/dropbox/folders/"

    f"{folder_id}/feedback/{entity_type}/{user_id}/attach"

)


# We pass the filename as a URL parameter

params = {

    'filename': file_name

}


headers = {

    'Authorization': f'Bearer {access_token}',

    'Content-Type': mime_type # Set content-type to the file's mime type

}


# 3. Read the raw file data

try:

    with open(file_path, 'rb') as f:

        file_data = f.read()


    # 4. Print the POST call to the console

    print("\n--- Printing POST Call Details ---")

    print(f"METHOD: POST")

    print(f"URL: {api_url}")

    print(f"PARAMS: {json.dumps(params, indent=4)}")

    print(f"HEADERS:")

    print(json.dumps(headers, indent=4))

    print(f"BODY: (Raw bytes of {file_name}, {len(file_data)} bytes)")

    print("------------------------------------")


    # 5. Attempt the posting

    print("\nAttempting to POST raw file data...")


    # We use the 'data' param to send the raw bytes

    response = requests.post(

        api_url,

        headers=headers,

        params=params,

        data=file_data 

    )


    response.raise_for_status() 


    print(f"✅ SUCCESS: {response.status_code} {response.reason}")

    print("File attached successfully.")


    response_data = response.json()

    print("\n--- Server Response Data ---")

    print(json.dumps(response_data, indent=2))

    print("------------------------------")


except requests.exceptions.HTTPError as err:

    print(f"❌ API CALL FAILED: {err.response.status_code} - {err.response.reason}")

    print("--- SERVER ERROR RESPONSE ---")

    print(err.response.text)

    print("-----------------------------")

except IOError as e:

    print(f"❌ File Error: Could not read file {file_path}. {e}")

except Exception as e:

    print(f"❌ An unexpected error occurred: {e}")