server {
    listen 80;
    server_name localhost;

    # 设置最大上传文件大小为10GB
    client_max_body_size 10G;

    # 安全响应头
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header Referrer-Policy "no-referrer-when-downgrade" always;

    # 隐藏Nginx版本
    server_tokens off;

    # 禁止访问隐藏文件和敏感文件
    location ~ /\. {
        deny all;
        return 404;
    }

    location ~ \.(env|git|config|key|pem|crt)$ {
        deny all;
        return 404;
    }

    # 前端静态文件
    location / {
        root /usr/share/nginx/html;
        index index.html;
        try_files $uri $uri/ =404;
    }

    # 后端API反向代理
    location /api/ {
        proxy_pass http://backend:40001;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        # 修复：使用当前请求协议（http或https），适用于直接IP访问
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_cache_bypass $http_upgrade;

        # Cookie传递配置（验证码session需要）
        proxy_set_header Cookie $http_cookie;
        proxy_pass_header Set-Cookie;

        # 增加超时时间支持大文件上传
        proxy_connect_timeout 300;
        proxy_send_timeout 300;
        proxy_read_timeout 300;
    }

    # 分享链接重定向
    location /s/ {
        proxy_pass http://backend:40001;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        # 修复：使用当前请求协议（http或https），适用于直接IP访问
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}