nginx 缓存设置

Posted 2022-02-04 wenyule

浏览器缓存原理

浏览器缓存

HTTP协议定义的缓存机制（如：Expires；Cache-control等）

2、浏览器无缓存

3、客户端有缓存

校验过期机制

校验是否过期                Expires、Cache-Control（max-age）

协议中Etag头信息校验        Etag

Last-Modified头信息校验     Last-Modified

5、配置语法-expires

添加    Cache-Control、Expires头

Syntax:    expires [modified]  time；

           expires epoch|max|off；

Default:   expires off；                 # 静态缓存

Context:   http，server，location，if in location

    location ~ .*\\.(htm|html)$ 
        expires 24h;
        root  /opt/app/code;
    

动态缓存设置

    upstream imooc 
        server 116.62.103.228:8001;
        server 116.62.103.228:8002;
        server 116.62.103.228:8003;
    

    proxy_cache_path /opt/app/cache levels=1:2 keys_zone=imooc_cache:10m max_size=10g inactive=60m use_temp_path=off;

server 
    listen       80;
    server_name  web01.fadewalk.com;

    access_log  /var/log/nginx/test_proxy.access.log  main;


    location / 
        proxy_cache off;
        proxy_pass http://imooc;

        proxy_cache_valid 200 304 12h;
        proxy_cache_valid any 10m;
        proxy_cache_key $host$uri$is_args$args;
        add_header  Nginx-Cache "$upstream_cache_status";

        proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
        include proxy_params;
    

查看

304 Not Modified