rocket-dreampress-expires.php

<?php

add_filter('rocket_htaccess_mod_expires', 'wp_rocket_remove_html_expire_dreampress');
/**
 * Remove expiration on HTML to prevent issue with Varnish cache
 *
 * @param string $rules htaccess rules.
 * @return Updated htaccess rules
 */
function wp_rocket_remove_html_expire_dreampress( $rules ) {
	$rules = <<<HTACCESS
# Expires headers (for better cache control)
<IfModule mod_expires.c>
	ExpiresActive on
	# Perhaps better to whitelist expires rules? Perhaps.
	ExpiresDefault                          "access plus 1 month"
	# cache.appcache needs re-requests in FF 3.6 (thanks Remy ~Introducing HTML5)
	ExpiresByType text/cache-manifest       "access plus 0 seconds"
	# Data
	ExpiresByType text/xml                  "access plus 0 seconds"
	ExpiresByType application/xml           "access plus 0 seconds"
	ExpiresByType application/json          "access plus 0 seconds"
	# Feed
	ExpiresByType application/rss+xml       "access plus 1 hour"
	ExpiresByType application/atom+xml      "access plus 1 hour"
	# Favicon (cannot be renamed)
	ExpiresByType image/x-icon              "access plus 1 week"
	# Media: images, video, audio
	ExpiresByType image/gif                 "access plus 1 month"
	ExpiresByType image/png                 "access plus 1 month"
	ExpiresByType image/jpeg                "access plus 1 month"
	ExpiresByType video/ogg                 "access plus 1 month"
	ExpiresByType audio/ogg                 "access plus 1 month"
	ExpiresByType video/mp4                 "access plus 1 month"
	ExpiresByType video/webm                "access plus 1 month"
	# HTC files  (css3pie)
	ExpiresByType text/x-component          "access plus 1 month"
	# Webfonts
	ExpiresByType application/x-font-ttf    "access plus 1 month"
	ExpiresByType font/opentype             "access plus 1 month"
	ExpiresByType application/x-font-woff   "access plus 1 month"
	ExpiresByType application/x-font-woff2  "access plus 1 month"
	ExpiresByType image/svg+xml             "access plus 1 month"
	ExpiresByType application/vnd.ms-fontobject "access plus 1 month"
	# CSS and JavaScript
	ExpiresByType text/css                  "access plus 1 year"
	ExpiresByType application/javascript    "access plus 1 year"
</IfModule>

HTACCESS;

	return $rules;
}