Turn on expire headers in Apache

Turn on expire headers in Apache

Answer:

By turning on the expire headers, browser will cache the files serving from Apache more aggressively, so as to reduce traffic loading to the Apache web server.

Steps:

Add the following lines to the Apache configuration (httpd.conf)

<IfModule mod_expires.c>
    ExpiresActive On

    # Cache all files for 2 weeks after access (A).
    ExpiresDefault A1209600
    
    # Do not cache dynamically generated pages.
    ExpiresByType text/html A1
</IfModule>

Restart Apache to take effect

# apachectl -k graceful

Assume the module mod_expires is enabled