add these lines to your httpd.conf
/usr/local/apache/conf/httpd.conf
LoadModule deflate_module modules/mod_deflate.so
#set compression level
DeflateCompressionLevel 9
<IfModule mod_deflate.c>
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE text/javascript
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE image/x-icon
AddOutputFilterByType DEFLATE image/svg+xml
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/javascript
AddOutputFilterByType DEFLATE application/x-javascript
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE application/x-font
AddOutputFilterByType DEFLATE application/x-font-truetype
AddOutputFilterByType DEFLATE application/x-font-ttf
AddOutputFilterByType DEFLATE application/x-font-otf
AddOutputFilterByType DEFLATE application/x-font-opentype
AddOutputFilterByType DEFLATE application/vnd.ms-fontobject
AddOutputFilterByType DEFLATE font/ttf
AddOutputFilterByType DEFLATE font/otf
AddOutputFilterByType DEFLATE font/opentype
# For Olders Browsers Which Can't Handle Compression
BrowserMatch ^Mozilla/4 gzip-only-text/html
BrowserMatch ^Mozilla/4\.0[678] no-gzip
BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
</IfModule>
# Cache 480 weeks
<FilesMatch "\.(ico|pdf|flv|jpg|jpeg|png|gif|js|css|swf|mp4|mp3|eot|woff|ttf|svg|iefix)$">
Header set Cache-Control "max-age=290304000, public"
</FilesMatch>
<IfModule mod_expires.c>
# Enable expirations
ExpiresActive On
# Default directive
ExpiresDefault "access plus 1 month"
# My favicon
ExpiresByType image/x-icon "access plus 1 year"
# Media: images, video, audio
ExpiresByType image/gif "access plus 1 year"
ExpiresByType image/png "access plus 1 year"
ExpiresByType image/jpg "access plus 1 year"
ExpiresByType image/jpeg "access plus 1 year"
ExpiresByType video/ogg "access plus 1 year"
ExpiresByType audio/ogg "access plus 1 year"
ExpiresByType video/mp4 "access plus 1 year"
ExpiresByType video/webm "access plus 1 year"
# Webfonts
ExpiresByType font/truetype "access plus 1 year"
ExpiresByType font/opentype "access plus 1 year"
ExpiresByType application/x-font-woff "access plus 1 year"
ExpiresByType image/svg+xml "access plus 1 year"
ExpiresByType application/vnd.ms-fontobject "access plus 1 year"
# CSS and JavaScript
ExpiresByType text/css "access plus 1 year"
ExpiresByType application/javascript "access plus 1 year"
ExpiresByType text/javascript "access plus 1 year"
</IfModule>
<IfModule mod_headers.c>
Header append Cache-Control "public"
</IfModule>
# Disable Folder Files Listing
Options -Indexes
#Prevent acess to php.ini
<FilesMatch "^php5?\.(ini|cgi)$">
Order Deny,Allow
Deny from All
Allow from env=REDIRECT_STATUS
</FilesMatch>
explanation:
- mod_deflate.so is disabled by default, you should enable it
- all media files(images, css, js...) will be cached and have a long expiration. no worry, this is based on last modified date of a file and if you replace those images on server, new file will be loaded on client.