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xiaoxia-saas/tests/unit
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fix(scripts): extract-from-douyin 异常路径全部返回业务码,杜绝 500 INTERNAL_ERROR
问题:POST /api/v1/scripts/extract-from-douyin 在抖音短链无效/网络异常/ASR 兜底异常等
场景下冒泡未捕获 Exception,被全局 general_exception_handler 吞成 500 INTERNAL_ERROR,
前端无法区分业务错误。

修复(apps/api/app/api/routes/scripts_ai.py):
1. yt-dlp 导入失败(缺依赖)→ 503(提示功能不可用)
2. yt_dlp.utils.DownloadError 单独捕获:
   - 含 404/not found/unable to download/unsupported url → 400「无法解析该抖音链接」
   - 其它网络/上游异常 → 502「视频下载失败」
3. 下载 info 成功但文件未落地(isfile False / size 0)→ 502「未获取到有效文件」
4. duration 非数字(TypeError/ValueError)→ 安全降级为 0
5. ASR 转写兜底 catch Exception → 502「语音识别失败」(原只 catch 两个自定义异常)
6. 最外层兜底 catch Exception → 500 但带具体 detail(不再是通用 INTERNAL_ERROR)
7. text/duration 提前初始化,避免异常路径 UnboundLocalError

测试:
- 新增 tests/unit/test_extract_from_douyin_errors.py,覆盖 8 个失败场景
- 更新 tests/unit/test_scripts_ai.py 三个成功/ASR 路径测试,mock os.path.isfile/getsize
- 全量单测 15531 passed
2026-09-16 13:16:45 +08:00
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