Function quickPingTest

speedtest/speedtest.ts:812–865

* 轻量级服务器ping测试

(serverId: number)

 * 轻量级服务器ping测试
 */
async function quickPingTest(serverId: number): Promise<{ available: boolean; ping?: number; error?: string }> {
  try {
    if (!fs.existsSync(SPEEDTEST_PATH)) {
      await downloadCli();
    }

    // 只进行ping测试，不执行完整的速度测试
    const command = `"${SPEEDTEST_PATH}" --accept-license --accept-gdpr -f json -s ${serverId} --progress=no --selection-details`;
    const { stdout, stderr } = await execAsync(command, {
      timeout: 8000 // 8秒超时，只需要ping测试
    });

    if (stderr) {
      if (stderr.includes("NoServersException") || stderr.includes("Server not found")) {
        return { available: false, error: "服务器不存在" };
      }
      if (stderr.includes("Timeout") || stderr.includes("timeout")) {
        return { available: false, error: "连接超时" };
      }
      if (stderr.includes("Cannot read from socket")) {
        return { available: false, error: "网络连接失败" };
      }
    }

    // 如果能获取到输出，说明服务器基本可用
    if (stdout && stdout.trim()) {
      try {
        const result = JSON.parse(stdout);
        if (result.ping && result.ping.latency) {
          return { available: true, ping: result.ping.latency };
        }
        if (result.server && result.server.id === serverId) {
          return { available: true };
        }
      } catch (parseError) {
        // JSON解析失败，但有输出说明服务器响应了
        return { available: true };
      }
    }

    return { available: true };
  } catch (error: any) {
    console.error(`Server ${serverId} ping test failed:`, error);

    if (error.code === 'ETIMEDOUT') {
      return { available: false, error: "连接超时" };
    }
    if (error.message?.includes('NoServersException')) {
      return { available: false, error: "服务器不可用" };
    }

    return { available: false, error: error.message || "未知错误" };
  }
}

/**
 * 简化的服务器可用性检测 - 仅检查服务器是否在列表中