nginx反向代理+缓存+添加Cache头

nginx.conf http块中添加

map $upstream_cache_status $tianyuanzhiyi_cache_status {
    default "MISS";
    "HIT"   "HIT";
}

修改站点配置

# /etc/nginx/conf.d/your-site.conf

server {
    listen 80 ; 
    server_name d19lv7tp.cn-nb1.rainapp.top; 
    
    index index.php index.html index.htm default.php default.htm default.html; 

    # --- 日志文件路径保持不变 ---
    access_log /www/d19lv7tp.cn-nb1.rainapp.top/log/access.log main; 
    error_log /www/d19lv7tp.cn-nb1.rainapp.top/log/error.log; 

    location / {
        # --- 新增：添加自定义缓存状态头 ---
        # 它的值来自您在 http 块中定义的 map
        add_header X-Cache-Tianyuanzhiyi-NodeXXX $tianyuanzhiyi_cache_status; 
        
        # --- 修改：将 proxy_pass 指向后端服务器 IP ---
        # 注意：因为后端是HTTPS，所以这里是 https://
        proxy_pass https://7.0.2.4; 

        # --- 基础代理头设置 ---
        # Host 头保持不变，让后端服务器知道请求的是哪个域名
        proxy_set_header Host xxx.net;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; 
        proxy_set_header X-Real-IP $remote_addr; 
        proxy_http_version 1.1; 
        # 清除 Connection 头，以便 Nginx 可以管理与后端的 keep-alive 连接
        proxy_set_header Connection ""; 

        # --- 缓存配置 ---
        proxy_ignore_headers Set-Cookie Cache-Control expires; 
        proxy_cache proxy_cache_common; 
        proxy_cache_key $host$uri$is_args$args; 
        
        # 服务器端缓存时间为 365 天
        proxy_cache_valid 200 304 301 302 365d; 
        
        # --- 浏览器端缓存设置 ---
        if ( $uri ~* "\.(gif|png|jpg|webp|css|js|woff|woff2)$" ) {
            # 浏览器缓存 30 天
            expires 30d; 
        }
    }
}