# Nginx WebSocket 代理配置示例
# 用于将 /api/socket.io 请求代理到后端的 Socket.IO 服务器

server {
    listen 80;
    server_name d1kt.cn;
    
    # 重定向 HTTP 到 HTTPS
    return 301 https://$server_name$request_uri;
}

server {
    listen 443 ssl http2;
    server_name d1kt.cn;
    
    # SSL 证书配置
    ssl_certificate /etc/letsencrypt/live/d1kt.cn/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/d1kt.cn/privkey.pem;
    
    # SSL 优化配置
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers ECDHE-RSA-AES256-GCM-SHA512:DHE-RSA-AES256-GCM-SHA512:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384;
    ssl_prefer_server_ciphers off;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;
    
    # 根目录静态文件服务
    root /var/www/typing_practiceweb/build;
    index index.html index.htm;
    
    # 静态资源缓存
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }
    
    # API 请求代理配置
    location /api/ {
        proxy_pass http://localhost:5001/;  # 注意：末尾的斜杠很重要！
        proxy_http_version 1.1;
        
        # WebSocket 代理头
        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;
        proxy_set_header X-Forwarded-Proto $scheme;
        
        # 超时设置
        proxy_read_timeout 86400;  # WebSocket 长连接需要较长的超时时间
        proxy_send_timeout 86400;
        proxy_connect_timeout 30;
        
        # 缓冲区设置
        proxy_buffering off;
        proxy_buffer_size 16k;
        proxy_buffers 4 32k;
    }
    
    # SPA 回退路由
    location / {
        try_files $uri $uri/ /index.html;
    }
}