Web前端禁止缓存

1. OpenResty 中禁止缓存

http {
    # 让 Nginx 不再自动计算 Expires / Cache-Control
    expires off;

    server {
        listen 80;
        server_name example.com;

        root  /data/www;
        index index.html;

        # ---------- 核心：彻底禁止缓存 ----------
        # 所有响应（包含 4xx/5xx）都加上禁止缓存的头
        add_header Cache-Control "no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0, s-maxage=0" always;
        add_header Pragma        "no-cache" always;
        add_header Expires       "0"       always;

        # 关闭基于时间/ETag 的条件缓存
        if_modified_since off;
        etag off;
        # ------------------------------------

        location / {
            try_files $uri $uri/ /index.html;
        }
    }
}

2. 关于 HTML <meta> 禁止缓存

前端常见写法：

<meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" />
<meta http-equiv="Pragma" content="no-cache" />
<meta http-equiv="Expires" content="0" />