apiErr := errorCodes.ToAPIErr(ErrMalformedPOSTRequest)
		apiErr.Description = fmt.Sprintf("%s (%v)", apiErr.Description, err)
		writeErrorResponse(ctx, w, apiErr, r.URL)
		return
	}

	const mapEntryOverhead = 200

	var (
		reader        io.Reader
		fileSize      int64 = -1
		fileName      string
		fanOutEntries = make([]minio.PutObjectFanOutEntry, 0, 100)
	)

	maxParts := 1000