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<?php
defined( 'ABSPATH' ) or die( 'Cheatin’ uh?' );
/**
* Get CNAMES hosts
*
* @since 2.3
*
* @param string $zones CNAMES zones.
* @return array $hosts CNAMES hosts
*/
function get_rocket_cnames_host( $zones = array( 'all' ) ) {
$hosts = array();
if ( $cnames = get_rocket_cdn_cnames( $zones ) ) {
foreach ( $cnames as $cname ) {
$cname = rocket_add_url_protocol( $cname );
$hosts[] = parse_url( $cname, PHP_URL_HOST );
}
}
return $hosts;
}
/**
* Get an URL with one of CNAMES added in options
*
* @since 2.1
*
* @param string $url The URL to parse.
* @param array $zone (default: array( 'all' )).
* @return string $url The URL with one of CNAMES
*/
function get_rocket_cdn_url( $url, $zone = array( 'all' ) ) {
$cnames = get_rocket_cdn_cnames( $zone );
$wp_content_dirname = ltrim( str_replace( home_url(), '', WP_CONTENT_URL ), '/' ) . '/';
$home = home_url();
if ( ( defined( 'DONOTCDN' ) && DONOTCDN ) || (int) get_rocket_option( 'cdn' ) === 0 || empty( $cnames ) || ! is_rocket_cdn_on_ssl() || is_rocket_post_excluded_option( 'cdn' ) ) {
return $url;
}
list( $host, $path, $scheme, $query ) = get_rocket_parse_url( $url );
$query = ! empty( $query ) ? '?' . $query : '';
// Exclude rejected & external files from CDN.
$rejected_files = get_rocket_cdn_reject_files();
if ( ( ! empty( $rejected_files ) && preg_match( '#(' . $rejected_files . ')#', $path ) ) || ( ! empty( $scheme ) && parse_url( home_url(), PHP_URL_HOST ) !== $host && ! in_array( $host, get_rocket_i18n_host(), true ) ) ) {
return $url;
}
if ( empty( $scheme ) ) {
// Check if the URL is external.
if ( strpos( $path, $home ) === false && ! preg_match( '#(' . $wp_content_dirname . '|wp-includes)#', $path ) ) {
return $url;
} else {
$path = str_replace( $home, '', ltrim( $path, '//' ) );
}
}
$url = untrailingslashit( $cnames[ ( abs( crc32( $path ) ) % count( $cnames ) ) ] ) . '/' . ltrim( $path, '/' ) . $query;
$url = rocket_add_url_protocol( $url );
return $url;
}
/**
* Wrapper of get_rocket_cdn_url() and print result
*
* @since 2.1
*
* @param string $url The URL to parse.
* @param array $zone (default: array( 'all' )).
*/
function rocket_cdn_url( $url, $zone = array( 'all' ) ) {
echo get_rocket_cdn_url( $url, $zone );
}
/**
* Apply CDN on CSS properties (background, background-image, @import, src:url (fonts))
*
* @since 2.6
*
* @param string $buffer file content.
* @return string modified file content
*/
function rocket_cdn_css_properties( $buffer ) {
$zone = array(
'all',
'images',
'css_and_js',
'css',
);
$cnames = get_rocket_cdn_cnames( $zone );
/**
* Filters the application of the CDN on CSS properties
*
* @since 2.6
*
* @param bool true to apply CDN to properties, false otherwise
*/
$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\0\x0B\"'" );
/**
* Filters the URL of the CSS property
*
* @since 2.8
*
* @param string $url URL of the CSS property
*/
$url = get_rocket_cdn_url( apply_filters( 'rocket_cdn_css_properties_url', $url ), $zone );
$property = str_replace( $matches[1][ $i ], $url, $matches[0][ $i ] );
$buffer = str_replace( $matches[0][ $i ], $property, $buffer );
$i++;
}
}
return $buffer;
}
/**
* Apply CDN on custom data attributes.
*
* @since 2.5.5
*
* @param string $html Original Output.
* @return string $html Output that will be printed
*/
function rocket_add_cdn_on_custom_attr( $html ) {
if ( preg_match( '/(data-lazy-src|data-lazyload|data-src|data-retina)=[\'"]?([^\'"\s>]+)[\'"]/i', $html, $matches ) ) {
$html = str_replace( $matches[2], get_rocket_cdn_url( $matches[2], array( 'all', 'images' ) ), $html );
}
return $html;
}