Complete project files including setup.sh

config.py

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+import os
+from datetime import timedelta
+
+class Config:
+    """应用配置类"""
+    
+    # 基础配置
+    SECRET_KEY = os.environ.get('SECRET_KEY') or 'dev-secret-key-change-in-production'
+    
+    # 数据库配置
+    BASE_DIR = os.path.abspath(os.path.dirname(__file__))
+    SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL') or \
+        'sqlite:///' + os.path.join(BASE_DIR, 'forum.db')
+    SQLALCHEMY_TRACK_MODIFICATIONS = False
+    
+    # 文件上传配置
+    UPLOAD_FOLDER = os.path.join(BASE_DIR, 'uploads')
+    MAX_CONTENT_LENGTH = 16 * 1024 * 1024  # 16MB 最大文件大小
+    ALLOWED_EXTENSIONS = {'png', 'jpg', 'jpeg', 'gif', 'webp'}
+    
+    # 会话配置
+    PERMANENT_SESSION_LIFETIME = timedelta(days=7)
+    
+    # 分页配置
+    POSTS_PER_PAGE = 20
+    
+    @staticmethod
+    def init_app(app):
+        """初始化应用配置"""
+        # 确保上传目录存在
+        os.makedirs(app.config['UPLOAD_FOLDER'], exist_ok=True)
+        os.makedirs(os.path.join(app.config['UPLOAD_FOLDER'], 'student_ids'), exist_ok=True)
+        os.makedirs(os.path.join(app.config['UPLOAD_FOLDER'], 'posts'), exist_ok=True)