Function getGroupMessages

sum/sum.ts:508–553

(chatId: string, count: number)

      return callAnthropic(
        provider.api_key,
        provider.base_url,
        provider.model,
        input,
        timeout,
      );
    default:
      return callChatCompletions(
        provider.api_key,
        provider.base_url,
        provider.model,
        input,
        timeout,
      );
  }
}

function canTryFallback(error: unknown): boolean {
  if (!axios.isAxiosError(error)) return false;
  if (error.response?.status === 404) return true;
  if (error.response?.status !== 400) return false;

  const detail = JSON.stringify(error.response.data).toLowerCase();
  return (
    detail.includes("unsupported_upstream") ||
    detail.includes("endpoint") ||
    detail.includes("not supported")
  );
}

async function callAI(
  provider: CustomProvider,
  messages: string,
  prompt: string,
  timeout: number,
): Promise<string> {
  const input = `${prompt}\n\n${messages}`;
  const protocol = detectProtocol(provider);

  try {
    return await callWithProtocol(protocol, provider, input, timeout);
  } catch (error) {
    // 仅在网关明确不支持当前端点时，尝试 OpenAI 兼容接口。
    if (
      provider.type === "auto" &&
      protocol !== "chat" &&
      canTryFallback(error)
    ) {
      return callWithProtocol("chat", provider, input, timeout);
    }