Function _append_openai_reference_images

src/api/routes.py:325–360

(
    model: str,
    messages: List[ChatMessage],
    images: List[bytes],
)

async def _append_openai_reference_images(
    model: str,
    messages: List[ChatMessage],
    images: List[bytes],
) -> List[bytes]:
    model_config = MODEL_CONFIG.get(model)
    if not model_config or model_config["type"] != "image" or len(messages) <= 1:
        return images

    debug_logger.log_info(f"[CONTEXT] 开始查找历史参考图，消息数量: {len(messages)}")

    for msg in reversed(messages[:-1]):
        if msg.role == "assistant" and isinstance(msg.content, str):
            matches = MARKDOWN_IMAGE_RE.findall(msg.content)
            if not matches:
                continue

            for image_url in reversed(matches):
                if not image_url.startswith("http") and "/tmp/" not in image_url:
                    continue
                try:
                    downloaded_bytes = await retrieve_image_data(image_url)
                    if downloaded_bytes:
                        images.insert(0, downloaded_bytes)
                        debug_logger.log_info(
                            f"[CONTEXT] ✅ 添加历史参考图: {image_url}"
                        )
                        return images
                    debug_logger.log_warning(
                        f"[CONTEXT] 图片下载失败或为空，尝试下一个: {image_url}"
                    )
                except Exception as exc:
                    debug_logger.log_error(
                        f"[CONTEXT] 处理参考图时出错: {str(exc)}"
                    )
    return images


async def _extract_prompt_and_images_from_gemini_contents(