nginx 牛刀小试（第二弹） 静态元素缓存
原文地址：http://balzac.iyunv.com/blog/20337831、步骤紧接第一弹。只是稍微在 nginx.conf 里添加了一点配置.
2、添加代码如下：
a、http标签内添加
##cache##
proxy_connect_timeout 5;
proxy_read_timeout 60;
proxy_send_timeout 5;
proxy_buffer_size 16k;
proxy_buffers 4 64k;
proxy_busy_buffers_size 128k;
proxy_temp_file_write_size 128k;
proxy_cache_key $host$server_port$request_uri;
proxy_temp_path html/temp;
proxy_cache_path html/cache/yy levels=1:2 keys_zone=yy:200m inactive=1d max_size=30g;
##end##
b、配置静态元素url
location ~ .*\.(gif|jpg|png|jpeg|bmp|css|js|flv|ico|swf|zip|html|htm|txt)(.*) {
proxy_pass http://big_server_com;
proxy_redirect off;
proxy_set_header Host $host;
proxy_cache yy;
proxy_cache_valid 200 302 6h;
proxy_cache_valid 301 1d;
proxy_cache_valid any 1m;
expires 30d;
}
3、添加一行add_header X-Cache $upstream_cache_status 。添加位置如下图
server {
listen 80;
server_namelocalhost;
#charset koi8-r;
#access_loglogs/host.access.logmain;
add_header X-Cache $upstream_cache_status; #添加这行即可
4、测试。首次打开项目中的图片url时，打开Google Chrome浏览器开发工具，点击NETWORK选项。
首次输入 http://localhost/demo/photo/20140413/2147e26b7d5a45a5ba9a876dbc5a3234.jpg,
Cache-Control:max-age=120
Connection:keep-alive
Date:Sun, 13 Apr 2014 04:36:21 GMT
ETag:W/"384534-1397362175350"
Expires:Sun, 13 Apr 2014 04:38:21 GMT
Last-Modified:Sun, 13 Apr 2014 04:09:35 GMT
Server:nginx/1.4.6-win64
X-Cache:MISS
继续刷新看到
Cache-Control:max-age=120
Connection:keep-alive
Date:Sun, 13 Apr 2014 04:37:30 GMT
ETag:W/"384534-1397362175350"
Expires:Sun, 13 Apr 2014 04:39:30 GMT
Last-Modified:Sun, 13 Apr 2014 04:09:35 GMT
Server:nginx/1.4.6-win64
X-Cache:HIT
如果删除nginx下的缓存文件，刷新url，可看到：
Cache-Control:max-age=120
Connection:keep-alive
Date:Sun, 13 Apr 2014 04:38:55 GMT
ETag:W/"384534-1397362175350"
Expires:Sun, 13 Apr 2014 04:40:55 GMT
Last-Modified:Sun, 13 Apr 2014 04:09:35 GMT
Server:nginx/1.4.6-win64
X-Cache:MISS
至此，该图片缓存已配置成功。
ps：如有不对，欢迎批评指正。
http://balzac.iyunv.com/blog/2033783
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