当用户访问网站的时候一些图片会自动缓存在电脑浏览器缓存中，当下一次访问的时候就不必要再次加载了。当超时或更新时，会重新请求加载。
1、配置虚拟主机
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
|
[root@juispan ~]
# vi /usr/local/apache2.4/conf/extra/httpd-vhosts.conf
<VirtualHost *:80>
DocumentRoot
"/data/www/abc.com"
ServerName abc.com
ServerAlias www.abc.com
ErrorLog
"logs/abc.com-error_log"
<IfModule mod_expires.c>
ExpiresActive on
##打开功能开关
ExpiresByType image
/gif
"access plus 1 days"
##定义失效时间
ExpiresByType image
/jpeg
"access plus 24 hours"
ExpiresByType image
/png
"access plus 24 hours"
ExpiresByType text
/css
"now plus 2 hour"
ExpiresByType application
/x-javascript
"now plus 2 hours"
ExpiresByType application
/javascript
"now plus 2 hours"
ExpiresByType application
/x-shockwave-flash
"now plus 2 hours"
ExpiresDefault
"now plus 0 min"
<
/IfModule
>
SetEnvIf Request_URI
".*\.gif$"
img
SetEnvIf Request_URI
".*\.jpg$"
img
SetEnvIf Request_URI
".*\.png$"
img
SetEnvIf Request_URI
".*\.bmp$"
img
SetEnvIf Request_URI
".*\.swf$"
img
SetEnvIf Request_URI
".*\.js$"
img
SetEnvIf Request_URI
".*\.css$"
img
CustomLog
"|/usr/local/apache2.4/bin/rotatelogs -l logs/abc.com-access_%Y%m%d.log 86400"
combined
env
=!img
<
/VirtualHost
>
|
2、检查重新加载
|
1
2
3
4
5
6
7
8
|
[root@juispan ~]
# /usr/local/apache2.4/bin/apachectl -t
Syntax OK
[root@juispan ~]
# /usr/local/apache2.4/bin/apachectl -M |grep -i expire
[root@juispan ~]
# vi /usr/local/apache2.4/conf/httpd.conf
LoadModule expires_module modules
/mod_expires
.so
##取消注释启用
[root@juispan ~]
# /usr/local/apache2.4/bin/apachectl -M |grep -i expire
expires_module (shared)
[root@juispan ~]
# /usr/local/apache2.4/bin/apachectl graceful
|
3、验证效果
|
1
2
3
4
5
6
7
8
9
10
11
|
[root@juispan abc.com]
# curl -x127.0.0.1:80 abc.com/123.gif -I
HTTP
/1
.1 200 OK
Date: Fri, 21 Jul 2017 11:19:21 GMT
Server: Apache
/2
.4.27 (Unix) PHP
/7
.1.6
Last-Modified: Fri, 21 Jul 2017 11:19:21 GMT
ETag: W/
"8c5-555b2e6023fc0"
Accept-Ranges: bytes
Content-Length: 2245
Cache-Control: max-age=86400
##最大老化时间86400秒，也就是1天
Expires: Sat, 22 Jul 2017 11:19:21 GMT
##过期时间
Content-Type: image
/gif
|
本文转自Grodd51CTO博客，原文链接：http://blog.51cto.com/juispan/1952835
，如需转载请自行联系原作者
