70 lines
1.9 KiB
Python
70 lines
1.9 KiB
Python
import logging
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from flask import Flask
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from .config import Config
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from .extensions import init_extensions, register_namespaces, close_extensions
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from .views import register_blueprints
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import atexit
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import logging
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import signal
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import eventlet
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eventlet.monkey_patch()
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import threading
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_shutdown_once = threading.Event()
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def _graceful_shutdown(app: Flask, signum: str = "atexit"):
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# 防止重复执行
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if _shutdown_once.is_set():
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return
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_shutdown_once.set()
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app.logger.info("Shutting down gracefully (%s)...", signum)
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try:
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close_extensions()
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finally:
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app.logger.info("Cleanup finished (%s).", signum)
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def _bind_signals(app: Flask):
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def handler(sig, frame):
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_graceful_shutdown(app, signum=sig)
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# 不要在这里强行 os._exit(0)，让外层管理器决定何时真正退出
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for s in (signal.SIGINT, signal.SIGTERM, getattr(signal, "SIGQUIT", None)):
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if s is not None:
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try:
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signal.signal(s, handler)
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except Exception:
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# 某些环境不能重绑定（如部分 WSGI 容器内），忽略
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pass
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def create_app(config_object: type = Config) -> Flask:
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app = Flask(__name__, template_folder="templates", static_folder="static")
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app.config.from_object(config_object)
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# secret_key 从 config 里来
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app.secret_key = app.config["SECRET_KEY"]
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# logging
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app.logger.setLevel(logging.DEBUG)
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register_namespaces(app)
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# 1) 初始化第三方扩展（db、cache、jwt、cors 等）
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init_extensions(app)
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# 2) 注册蓝图（把子文件暴露的蓝图统一挂到 app 上）
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register_blueprints(app)
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# 3) 其他钩子/命令/错误处理
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@app.route("/healthz")
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def healthz():
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return {"status": "ok"}
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# 绑定退出钩子（开发/简单部署环境很有用）
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atexit.register(_graceful_shutdown, app, "atexit")
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_bind_signals(app)
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return app
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