def create_app(config):
    """
    创建app
    """
    # 添加配置
    app.config.from_object(config)
    # 解决跨域
    app.after_request(_access_control)
    # 自定义abort 400 响应数据格式
    flask_restful.abort = _custom_abort
    # 数据库初始化
    db.init_app(app)
    # 注册蓝图
    from routes import api_v1
    app.register_blueprint(api_v1, url_prefix='/api/v1')
    # 使用flask原生异常处理程序
    app.handle_exception = handle_exception
    app.handle_user_exception = handle_user_exception
    return app 

def register_exts(app: Flask):
    # flask-sqlalchemy
    db.init_app(app)

    # flask-login
    login = LoginManager(app)
    login.login_message = None
    login.login_view = 'admin.login'
    login.user_loader(lambda user_id: get_user(user_id))

    # exts.library
    from . import library
    LibraryManager(app, library)

    # exts.message
    Message(app)