独立站建站底层架构选型百科：Shopify SaaS vs WordPress/WooCommerce 自建站全维度深度对比与 TCO 算账

# 1. 定义 FastCGI 微缓存存储区 (100MB 内存索引，1GB 磁盘缓存)
fastcgi_cache_path /var/run/nginx-cache levels=1:2 keys_zone=WORDPRESS:100m inactive=60m max_size=1g;
fastcgi_cache_key "$scheme$request_method$host$request_uri";
fastcgi_cache_use_stale error timeout updating invalid_header http_500;
fastcgi_ignore_headers Cache-Control Expires Set-Cookie;

server {
    listen 443 ssl http2;
    server_name mybrandstore.com;
    root /var/www/wordpress;
    index index.php;

    # 2. 判定是否跳过电商动态缓存 (购物车、结算页、已登录用户绝对不缓存)
    set $skip_cache 0;

    # POST 请求与带有查询参数不缓存
    if ($request_method = POST) { set $skip_cache 1; }
    if ($query_string != "") { set $skip_cache 1; }

    # WooCommerce 核心关键页面白名单防串单
    if ($request_uri ~* "/cart/*|/checkout/*|/my-account/*|/addons/*|/wp-admin/*|xmlrpc.php") {
        set $skip_cache 1;
    }

    # 电商会话与登录状态 Cookie 判定
    if ($http_cookie ~* "comment_author|wordpress_[a-f0-9]+|wp-postpass|wordpress_no_cache|wordpress_logged_in|woocommerce_items_in_cart|woocommerce_cart_hash") {
        set $skip_cache 1;
    }

    # 3. PHP-FPM 请求代理与缓存命中响应头输出
    location ~ .php$ {
        include fastcgi_params;
        fastcgi_pass unix:/var/run/php/php8.2-fpm.sock;
        fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;

        fastcgi_cache_bypass $skip_cache;
        fastcgi_no_cache $skip_cache;
        fastcgi_cache WORDPRESS;
        fastcgi_cache_valid 200 301 302 10m; # 普通商品与文章缓存 10 分钟

        add_header X-FastCGI-Cache $upstream_cache_status;
    }
}