对话系统限时秒杀

import time
from flask import Flask, request, jsonify
from flask_sqlalchemy import SQLAlchemy
from sqlalchemy import Column, Integer, String, DateTime
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from datetime import datetime

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///秒杀.db'
db = SQLAlchemy(app)
Base = declarative_base()

class Product(Base):
    __tablename__ = 'products'
    id = Column(Integer, primary_key=True)
    name = Column(String)
    stock = Column(Integer)

engine = db.engine
Session = sessionmaker(bind=engine)
session = Session()

@app.route('/seckill', methods=['POST'])
def seckill():
    product_id = request.json.get('product_id')
    product = session.query(Product).filter_by(id=product_id).first()
    if not product or product.stock <= 0:
        return jsonify({'status': 'fail', 'message': '商品已售罄'})
    
    product.stock -= 1
    session.commit()
    return jsonify({'status': 'success', 'message': '秒杀成功'})

if __name__ == '__main__':
    Base.metadata.create_all(engine)
    app.run(debug=True)