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feat: #1208 AI封面接入MediaKit视频截帧 (#1214)
2026-08-02 01:14:02 +08:00

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"""统一配置基类 — 所有服务共享的基础配置。
数据库/Redis/OSS/Celery/AI服务等通用配置统一定义在此。
API 和 Worker 各自的 Settings 类继承本类,只追加服务特有字段。
单例模式和 env 文件加载逻辑也统一在这里实现。
"""
import os
from typing import Optional, Type, TypeVar
from pydantic_settings import BaseSettings, SettingsConfigDict
T = TypeVar("T", bound=BaseSettings)
class SharedSettings(BaseSettings):
"""所有服务共享的基础配置。
API 和 Worker 都继承本类,确保:
1. 数据库/Redis/OSS/Celery 等核心配置默认值一致
2. 环境变量命名统一(snake_casepydantic-settings 自动兼容大写)
3. env 文件加载逻辑只实现一次
"""
# ── 环境 ──────────────────────────────────────────────────────────────
environment: str = "development"
debug: bool = True
auto_create_schema: bool = False
# ── 数据库 ────────────────────────────────────────────────────────────
database_url: str = "postgresql+psycopg://postgres:postgres@localhost:5432/xiaoxia_saas"
database_pool_size: int = 20
database_max_overflow: int = 10 # pool_size(20) + max_overflow(10) = 最大30连接
database_pool_timeout: int = 30
database_pool_recycle: int = 3600
# 测试用:使用 SQLite 内存数据库(CI 环境无需 PostgreSQL
use_in_memory_db: bool = False
# ── Redis ────────────────────────────────────────────────────────────
redis_url: str = "redis://localhost:6379/0"
# ── Celery ───────────────────────────────────────────────────────────
celery_broker_url: str = "redis://localhost:6379/0"
celery_result_backend: str = "redis://localhost:6379/1"
# ── OSS 阿里云 ──────────────────────────────────────────────────────
oss_endpoint: str = "oss-cn-hangzhou.aliyuncs.com"
oss_access_key_id: str = ""
oss_access_key_secret: str = ""
oss_bucket_name: str = "xiaoxia-autocut"
oss_direct_upload_max_mb: int = 2000
oss_direct_upload_expire_seconds: int = 900
# ── CosyVoice (阿里云百炼语音合成) ───────────────────────────────────
cosyvoice_api_key: str = ""
cosyvoice_base_url: str = "https://dashscope.aliyuncs.com/api/v1"
cosyvoice_model: str = "cosyvoice-v3-flash"
cosyvoice_voice: str = "longxiaochun_v3" # 默认音色(v3 系列系统音色带 _v3 后缀)
cosyvoice_sample_rate: int = 22050
cosyvoice_format: str = "mp3" # 输出格式:mp3/wav/pcm
# 音色克隆模型名(固定为 voice-enrollment
cosyvoice_clone_model: str = "voice-enrollment"
# ── 豆包大模型(火山引擎方舟) ────────────────────────────────────────
doubao_api_key: str = ""
doubao_model: str = "doubao-seed-1-6-250615"
doubao_base_url: str = "https://ark.cn-beijing.volces.com/api/v3"
doubao_timeout: int = 30
doubao_max_retries: int = 2
# ── MediaKit (火山引擎 AI 媒体工具) ──────────────────────────────────
mediakit_api_key: str = ""
mediakit_base_url: str = "https://mediakit.cn-beijing.volces.com/api/v1"
mediakit_timeout: int = 60
@property
def effective_database_url(self) -> str:
"""返回实际使用的数据库 URL。
当 USE_IN_MEMORY_DB=True 时返回 SQLite 内存 URL,否则返回 database_url。
"""
if self.use_in_memory_db:
return "sqlite:///./test.db"
return self.database_url
model_config = SettingsConfigDict(
env_file=".env",
env_file_encoding="utf-8",
case_sensitive=False,
extra="ignore",
)
# ── 统一单例管理 ────────────────────────────────────────────────────────
# 所有 Settings 类的单例缓存都在这里,消除每处各自实现的重复代码
_settings_cache: dict[str, BaseSettings] = {}
def _get_env_file() -> str:
"""根据 APP_ENV 决定读取哪个 env 文件。"""
env = os.getenv("APP_ENV", "development")
env_file = f".env.{env}" if env != "development" else ".env"
return env_file if os.path.exists(env_file) else ".env"
def get_cached_settings(settings_class: Type[T], cache_key: Optional[str] = None) -> T:
"""统一的 Settings 单例获取函数。
所有服务都通过这个函数获取配置,消除重复的单例实现。
按类名缓存,同一类只初始化一次。
"""
key = cache_key or settings_class.__name__
if key not in _settings_cache:
env_file = _get_env_file()
_settings_cache[key] = settings_class(_env_file=env_file)
return _settings_cache[key] # type: ignore[return-value]
def reload_settings_cache() -> None:
"""清空配置缓存,下次获取时重新加载。测试用。"""
_settings_cache.clear()
def get_shared_settings() -> SharedSettings:
"""获取共享配置单例(统一入口)。"""
return get_cached_settings(SharedSettings)