Significant-Gravitas/AutoGPT · warning · HTTPException

Failed to read uploaded file

Error message

Failed to read uploaded file

What it means

Returned (400) when reading the multipart file body raises an exception (await file.read() fails). The underlying error is logged server-side; the client only sees the generic message. Causes are typically aborted/truncated uploads or framework-level read errors.

Source

Thrown at autogpt_platform/backend/backend/api/features/oauth.py:718

        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Media storage is not configured",
        )

    # Validate content type
    content_type = file.content_type
    if content_type not in LOGO_ALLOWED_TYPES:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=f"Invalid file type. Allowed: JPEG, PNG, WebP. Got: {content_type}",
        )

    # Read file content
    try:
        file_bytes = await file.read()
    except Exception as e:
        logger.error(f"Error reading logo file: {e}")
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Failed to read uploaded file",
        )

    # Check file size
    if len(file_bytes) > LOGO_MAX_FILE_SIZE:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=(
                "File too large. "
                f"Maximum size is {LOGO_MAX_FILE_SIZE // 1024 // 1024}MB"
            ),
        )

    # Validate image dimensions
    try:
        image = Image.open(io.BytesIO(file_bytes))
        width, height = image.size

View on GitHub (pinned to 9c8bb5550f)

Solutions

1. Retry the upload over a stable connection
2. Check reverse proxy client_max_body_size / request buffering settings
3. Inspect backend logs for the logged underlying exception to identify the real cause

if file.size is not None and file.size <= 0:
    raise ValueError("empty or unreadable file")

if resp.status_code == 400 and "Failed to read" in resp.text:
    backoff_and_retry(max_attempts=2)

When it happens

Trigger: Client disconnects mid-upload, connection reset while streaming the multipart body, malformed multipart encoding, or upstream proxy truncating the request.

Common situations: Reverse proxy (nginx/traefik) with a body size limit cutting the stream; flaky mobile networks aborting uploads; hand-rolled multipart payloads with wrong part boundaries.

Related errors

• Invalid file type. Allowed: JPEG, PNG, WebP. Got: {content_t
• File too large. Maximum size is {LOGO_MAX_FILE_SIZE // 1024
• Logo must be square. Got {width}x{height}
• Logo too small. Minimum {LOGO_MIN_SIZE}x{LOGO_MIN_SIZE}. Got
• Logo too large. Maximum {LOGO_MAX_SIZE}x{LOGO_MAX_SIZE}. Got

AI-assisted analysis of Significant-Gravitas/AutoGPT@9c8bb5550f (2026-08-14). Data as JSON: /api/errors/84a7ba291a5b33b8. Report an issue: GitHub.