function rocket_dns_prefetch($buffer)
{
$dns_link_tags = '';
$cdn_cnames = get_rocket_cdn_cnames(array('all', 'images', 'css_and_js', 'css', 'js'));
// Don't add CNAMES if CDN is disabled HTTPS pages or on specific posts
if (!is_rocket_cdn_on_ssl() || is_rocket_post_excluded_option('cdn')) {
$cdn_cnames = array();
}
$domains = array_merge($cdn_cnames, (array) get_rocket_option('dns_prefetch'));
/**
* Filter list of domains to prefetch DNS
*
* @since 1.1.0
*
* @param array $domains List of domains to prefetch DNS
*/
$domains = apply_filters('rocket_dns_prefetch', $domains);
if (count($domains)) {
foreach ($domains as $domain) {
$dns_link_tags .= '<link rel="dns-prefetch" href="' . esc_url($domain) . '" />';
}
}
// Insert all DNS prefecth tags in head
$buffer = preg_replace('/<head(.*)>/', '<head$1><!--[if IE]><![endif]-->' . $dns_link_tags, $buffer, 1);
return $buffer;
}
function rocket_cdn_css_properties($buffer)
{
$zone = array('all', 'css_and_js', 'css');
$cnames = get_rocket_cdn_cnames($zone);
/**
* Allow a "force deactivation" link to be printed, use at your own risks
*
* @since 2.0.0
*
* @param bool true will print the link
*/
$do_rocket_cdn_css_properties = apply_filters('do_rocket_cdn_css_properties', true);
if (!get_rocket_option('cdn') || !$cnames || !$do_rocket_cdn_css_properties) {
return $buffer;
}
preg_match_all('/url\\((?![\'"]?data)([^\\)]+)\\)/i', $buffer, $matches);
if (is_array($matches)) {
$i = 0;
foreach ($matches[1] as $url) {
$url = trim($url, " \t\n\r\v\"'");
$url = get_rocket_cdn_url($url, $zone);
$property = str_replace($matches[1][$i], $url, $matches[0][$i]);
$buffer = str_replace($matches[0][$i], $property, $buffer);
$i++;
}
}
return $buffer;
}
function rocket_cdn_enqueue($src)
{
// Don't use CDN if in admin, in login page, in register page or in a post preview
if (is_admin() || is_preview() || in_array($GLOBALS['pagenow'], array('wp-login.php', 'wp-register.php'))) {
return $src;
}
$src = set_url_scheme($src);
$zone = array('all', 'css_and_js');
// Add only CSS zone
if (current_filter() == 'style_loader_src') {
$zone[] = 'css';
}
// Add only JS zone
if (current_filter() == 'script_loader_src') {
$zone[] = 'js';
}
if ($cnames = get_rocket_cdn_cnames($zone)) {
list($src_host, $src_path) = get_rocket_parse_url($src);
// Check if the link isn't external
if ($src_host == parse_url(home_url(), PHP_URL_HOST) && trim($src_path, '/') != '') {
$src = get_rocket_cdn_url($src, $zone);
}
}
return $src;
}
public function tm_image_url($url = "")
{
// WP Rocket cdn
if (defined('WP_ROCKET_VERSION') && function_exists('get_rocket_cdn_cnames') && function_exists('get_rocket_cdn_url')) {
$zone = array('all', 'images');
if (is_array($url)) {
foreach ($url as $key => $value) {
$ext = pathinfo($value, PATHINFO_EXTENSION);
if (is_admin() && $ext != 'php') {
continue;
}
if ($cnames = get_rocket_cdn_cnames($zone)) {
$url[$key] = get_rocket_cdn_url($value, $zone);
}
}
} else {
$ext = pathinfo($url, PATHINFO_EXTENSION);
if (is_admin() && $ext != 'php') {
//skip
} else {
if ($cnames = get_rocket_cdn_cnames($zone)) {
$url = get_rocket_cdn_url($url, $zone);
}
}
}
}
return $url;
}
