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from flask import Flask, request, jsonify, send_from_directory
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import pandas as pd
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import random
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from flask_sqlalchemy import SQLAlchemy
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from flask_cors import CORS
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app = Flask(__name__)
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CORS(app) # 启用 CORS
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app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///students.db'
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app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
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app.config['MAX_CONTENT_LENGTH'] = 16 * 1024 * 1024 # 最大上传文件限制
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db = SQLAlchemy(app)
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class Student(db.Model):
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id = db.Column(db.Integer, primary_key=True)
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name = db.Column(db.String(100), nullable=False)
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student_id = db.Column(db.String(20), unique=True, nullable=False)
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points = db.Column(db.Float, default=0)
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called_count = db.Column(db.Integer, default=0)
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@app.route('/upload_students', methods=['POST'])
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def upload_students():
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if 'file' not in request.files:
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return jsonify(message="未找到文件"), 400
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file = request.files['file']
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if file.filename == '':
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return jsonify(message="没有选择文件"), 400
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if not (file.filename.endswith('.xlsx') or file.filename.endswith('.xls')):
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return jsonify(message="文件格式不支持，请上传 Excel 文件"), 400
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try:
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df = pd.read_excel(file)
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if '姓名' not in df.columns or '学号' not in df.columns:
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return jsonify(message="Excel 文件必须包含 '姓名' 和 '学号' 列"), 400
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for _, row in df.iterrows():
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student = Student(name=row['姓名'], student_id=row['学号'])
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db.session.add(student)
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db.session.commit()
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return jsonify(message="学生名单上传成功"), 200
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except Exception as e:
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print(f"Error: {e}")
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return jsonify(message=f"文件处理失败: {str(e)}"), 500
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@app.route('/call_student', methods=['POST'])
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def call_student():
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students = Student.query.all()
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total_points = sum(student.points for student in students)
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if total_points == 0:
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chosen_student = random.choice(students)
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else:
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probabilities = [(student, 1 - (student.points / total_points)) for student in students]
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total_prob = sum(prob[1] for prob in probabilities)
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chosen_student = random.choices(
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[prob[0] for prob in probabilities],
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weights=[prob[1] / total_prob for prob in probabilities]
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)[0]
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chosen_student.called_count += 1
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chosen_student.points += 1 # 点到后增加积分
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db.session.commit()
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return jsonify(name=chosen_student.name, student_id=chosen_student.student_id, index=chosen_student.id)
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@app.route('/update_points', methods=['POST'])
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def update_points():
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data = request.json
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student = Student.query.get(data['index'])
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answer = data['answer']
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score = 0
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question = "1+1=？" # 假设提问内容
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if answer == question:
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score += 0.5
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result_message = "回答正确！"
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else:
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score -= 1
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result_message = "回答错误！"
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# 模拟准确回答的情况
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if "Ezio" == answer:
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score += random.uniform(0.5, 3.0)
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result_message = "回答非常正确！"
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student.points += score
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db.session.commit()
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if student.points < 0:
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student.points = 0 # 确保积分不为负值
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db.session.commit()
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return jsonify(points=student.points, message=result_message)
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@app.route('/')
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def index():
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return send_from_directory('', 'index.html')
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if __name__ == '__main__':
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with app.app_context():
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db.create_all()
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app.run(debug=True)
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