Enable Browser Caching for Apache on Centos

apache-2.2cachecentos6

I am having an issue trying to get browser caching enabled for a website which is served by Apache on a Centos server.

I have done all the usual steps which have worked for me before with Ubuntu installations so at this point I am a bit stumped. I have been googling around but have yet to find a reason why they might require different setups on Centos to Ubuntu. Might be worth mentioning that mod_deflate works fine, any help would be greatly appreciated.

Centos Version

rpm -q centos-release
centos-release-6-9.el6.12.3.x86_64

Apache Version

rpm -q httpd
httpd-2.2.15-59.el6.centos.x86_64

No AllowOveride None's in httpd.conf

grep 'AllowOverride' httpd.conf
AllowOverride All
# AllowOverride controls what directives may be placed in .htaccess files.
AllowOverride All
#    AllowOverride FileInfo AuthConfig Limit
# for additional configuration directives.  See also the AllowOverride
AllowOverride All
AllowOverride All
AllowOverride All

No AllowOverride None's in website VHost.conf

grep 'AllowOverride' /etc/httpd/conf.d/website-in-question.com.conf
AllowOverride All

Modules are enabled

apachectl -M | grep expires
expires_module (shared)
Syntax OK
apachectl -M | grep headers
headers_module (shared)
Syntax OK

.htaccess content:

#SERVER COMPRESSION
<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>

## EXPIRES CACHING ##
<IfModule mod_expires.c>
 ExpiresActive On
 ExpiresByType image/jpg "access 1 year"
 ExpiresByType image/jpeg "access 1 year"
 ExpiresByType image/gif "access 1 year"
 ExpiresByType image/png "access 1 year"
 ExpiresByType image/svg "access 1 year"
 ExpiresByType text/css "access 1 month"
 ExpiresByType text/html "access 1 month"
 ExpiresByType application/pdf "access 1 month"
 ExpiresByType text/x-javascript "access 1 month"
 ExpiresByType application/x-shockwave-flash "access 1 month"
 ExpiresByType image/x-icon "access 1 year"
 ExpiresDefault "access 1 month"
</IfModule>

<ifModule mod_headers.c>

 Header set Connection keep-alive

 <filesMatch ".(css|jpg|jpeg|png|gif|js|ico|svg)$">
  Header set Cache-Control "max-age=60, public"
 </filesMatch>

</ifModule>

Best Answer

Turns out if I removed the following lines from .htaccess it will work:

 <filesMatch ".(css|jpg|jpeg|png|gif|js|ico|svg)$">
  Header set Cache-Control "max-age=60, public"
 </filesMatch>

Feel like a bit of an idiot now but hey ho at least its working!

Related Solutions

Windows – Content Encoding Error when trying to use GZip on Apache

The first issue is that you have the element with a directory from the file system...

This is from the Apache manual:

When to use <Location>. Use <Location> to apply directives to content that lives outside the filesystem. For content that lives in the filesystem, use <Directory> and <Files>. An exception is <Location />, which is an easy way to apply a configuration to the entire server.

When I setup mod_deflate on Apache I use this setup:

# --------------------------------------------------------
# Deflate Module Configuration
# --------------------------------------------------------
<IfModule deflate_module>
  # Set the location to webservers root
  <Location />
    # Insert the filters
    SetOutputFilter DEFLATE

    # Netscape 4.x has some problems
    BrowserMatch ^Mozilla/4 gzip-only-text/html
    # Netscape 4.06-4.08 have some more problems
    BrowserMatch ^Mozilla/4.0[678] no-gzip
    # MSIE masquerades as Netscape, but it is fine
    BrowserMatch \bMSIE !no-gzip !gzip-only-text/html

    # Make sure proxies don't deliver the wrong content
    Header append Vary User-Agent env=!dont-vary

    # Make sure to never zip binaries (ie6 and chrome has issues with this.)
    SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png)$ no-gzip dont-vary
    SetEnvIfNoCase Request_URI \.(?:exe|t?gz|zip|bz2|sit|rar)$ no-gzip dont-vary
    SetEnvIfNoCase Request_URI \.pdf$ no-gzip dont-vary
  </Location>

    # Enable mod_deflate logging by uncommenting these lines
    #DeflateFilterNote Input instream
    #DeflateFilterNote Output outstream
    #DeflateFilterNote Ratio ratio

    #LogFormat '"%r" %{outstream}n/%{instream}n (%{ratio}n%%)' deflate
    #CustomLog logs/deflate_log deflate 
</IfModule>

Tomcat – Apache2 – mod_expire and mod_rewrite not working in httpd.conf – serving content from tomcat

Probably the ProxyPass / directive you have in your config routes all requests to the Tomcat backend, bypassing all your mod_rewrite directives. You can try to remove the ProxyPass directive and use RewriteRule with the [P] flag after your other rewrites:

mod_rewrite: P|proxy

For the expire headers the situation is worse — in another similar question a solution was not found.

Option +FollowSymLinks would be needed for using mod_rewrite in .htaccess files; in your case it is not required, because you can put everything in the Apache config. Moving rules from config to .htaccess is pointless and can only make things slower. However, there is an important difference between .htaccess and the Apache config — in .htaccess patterns in RewriteRule are matched against relative filesystem paths (which never start with /), while in the VirtualHost context these patterns are matched against the URL path after the hostname, which always starts with /. Therefore at least one of your rules is incorrect:

RewriteRule ^content/(js|css)/([a-z]+)-([0-9]+)\.(js|css)$ /content/$1/$2.$4

should be

RewriteRule ^/content/(js|css)/([a-z]+)-([0-9]+)\.(js|css)$ /content/$1/$2.$4

(note the additional slash in the beginning).

Best Answer

Related Solutions

Windows – Content Encoding Error when trying to use GZip on Apache

Tomcat – Apache2 – mod_expire and mod_rewrite not working in httpd.conf – serving content from tomcat

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